版权声明：本文为博主原创文章，未经博主允许不得转载。有问题联系shouspencercjh@foxmail.com https://blog.csdn.net/weixin_40411846/article/details/81385482

使用 Spring + Spring MVC +MyBatis 搭建一个服务端

想直接看项目源码的，请移步https://gitee.com/spencercjh/shouers

欢迎大家关注我的微信公众号 spencerlife，这篇文章原本不会在这出现而仅仅是一次公众号推送，全因图文消息不能超过50000字。

第一次在微信公众号给大家写技术文章，就写最傻瓜最萌新的SSM使用教程吧。

这里只有使用方法，你可以直接复制黏贴地开始搭建自己的SSM环境，具体的实现理论我不再赘述，自己看书研究吧。但我会介绍每个文件是干什么的。

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环境准备（我自己的环境）

Intelij IDEA 2018.1.1 （IDE）

Java8 1.8.0_152 （JDK）

Apache Maven 3.5.0 （Maven）

MySQL 5.7.17 （DataBase）

Tomcat 8.5 （Local Sever）

开始

1 Create New Project

New Project左侧栏中有许许多多的选择，选择绿叶图标的Spring Initializr，SDK默认JDK，Initializr Server URL默认不变start.spring.io。

单击Next。

Group是团队名称，一般命名规则都是com.公司/团队名；Artifact是项目名称。举个例子比如我最近做了一个网站后端是给上海海洋大学用的，项目名字叫shouers，所以我的Group+Artifact就是com.shou.shouers，我不建议在这里有大小写，因为当你发现包名、项目名、XX名、XX名都不一样的时候，你会疯掉的。这是我一点人生的经验。

Type里你可以选择是Maven Project还是Gradle Projcet，Maven和Gradle简单说都是管理dependency（没有这些东西我们需要下载jar包并导入）。

Language选择Java。（但你也可以了解了解Kotlin呢【安利】）

Packaging选择War包，本人才疏学浅还只会部署war包到服务器上，还并不了解jar包怎么使用。

Java Version选择8。

Version一般不改。

Name可以改成Artifact名

单击Next。

Description可以简单写写，我从来没试过在这里写中文，我建议你也别尝试。

Package 就是包名，会根据Group+Artifact自动生成，你当然可以自己改，所以我所有的建议都是针对萌新，当你不知道会发生什么事情的时候，就要谨慎行事。

接下来选择Dependencies，制作一个我们是给网站/App/小程序/公众号做服务端，你要根据需要去勾选：我的项目非常简单，所以只勾了：Web、MySQL，JDBC，MyBatis。你仔细看上面会发现还要选择Spring Boot的版本，这个不用管它，我们不用Spring Boot，我们会在后面的Maven Pom文件中把项目改回我们要的样子，对熟悉自己在做什么事情的人来说，怎么创建SSM项目都行。（在New Project中选择Spring而不选择Spring Initializr，或者只创建Maven/Gradle项目自己手动添加Spring有关的配置，或者自己手写一个Spring框架【笑】）

单击Next。

Project Name，我建议你用Artifact名，到现在你应该一直都是小写它的。

Project Location，项目的物理位置。我建议你不要在C盘的User目录下，或者program files目录里放工程项目。（经常会因为C盘的写入权限或者文件系统让你头皮发麻的）

别的都不用你操心了。

单击Finish。

2 开始复制黏贴我的代码吧

我会介绍每个文件是干嘛的。

2.1 pom.xml

你会发现你刚刚的设置其实都体现在pom.xml里了，你可以在这里修改以颠覆刚刚的设置，改完了以后要import changes。

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.shou</groupId> <artifactId>shouers</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <name>shouers</name> <description>shouers</description> <properties> <!-- spring版本号 --> <spring.version>4.3.3.RELEASE</spring.version> <!-- mybatis版本号 --> <mybatis.version>3.1.1</mybatis.version> <!-- log4j日志文件管理包版本 --> <slf4j.version>1.7.7</slf4j.version> <log4j.version>2.5</log4j.version> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <!-- spring核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-oxm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <!-- mybatis核心包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <!-- mybatis/spring包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.1.0</version> </dependency> <!-- 导入java ee jar 包 --> <dependency> <groupId>javax</groupId> <artifactId>javaee-api</artifactId> <version>7.0</version> </dependency> <!-- 导入Mysql数据库链接jar包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.30</version> </dependency> <!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.2.2</version> </dependency> <!-- JSTL标签类 --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- 日志文件管理包 --> <!-- log start --> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>${log4j.version}</version> </dependency> <!-- 格式化对象，方便输出日志 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.1.41</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> </dependency> <!-- log end --> <!-- 映入JSON --> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.13</version> </dependency> <!-- 上传组件包 --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.9</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-email --> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-email</artifactId> <version>1.4</version> </dependency> <!-- 聊天功能相关包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-messaging</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-websocket</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>2.8.1</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.8.1</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.8.1</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.6.2</version> </dependency> <dependency> <groupId>net.sf.json-lib</groupId> <artifactId>json-lib</artifactId> <version>2.4</version> <classifier>jdk15</classifier> <scope>compile</scope> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpcore</artifactId> <version>4.4</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient --> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.3</version> </dependency> <dependency> <groupId>org.jsoup</groupId> <artifactId>jsoup</artifactId> <version>1.8.3</version> </dependency> <!-- https://mvnrepository.com/artifact/org.json/json --> <dependency> <groupId>org.json</groupId> <artifactId>json</artifactId> <version>20171018</version> </dependency> <!-- jwt token 生成相关的包 --> <dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt</artifactId> <version>0.9.0</version> </dependency> <!-- 生成二维码的图片的工具类 --> <!-- https://mvnrepository.com/artifact/com.google.zxing/core --> <dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.3.0</version> </dependency> <!-- https://mvnrepository.com/artifact/com.google.zxing/javase --> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>3.3.0</version> </dependency> <dependency> <groupId>dom4j</groupId> <artifactId>dom4j</artifactId> <version>1.6.1</version> </dependency> <dependency> <groupId>com.thoughtworks.xstream</groupId> <artifactId>xstream</artifactId> <version>1.3.1</version> </dependency> </dependencies> <build> <!--解决Intellij构建项目时，target/classes目录下不存在mapper.xml文件--> <resources> <resource> <directory>${basedir}/src/main/java</directory> <includes> <include>**/*.xml</include> </includes> </resource> </resources> <plugins> <plugin> <artifactId>maven-eclipse-plugin</artifactId> <version>2.9</version> <configuration> <additionalProjectnatures> <projectnature>org.springframework.ide.eclipse.core.springnature</projectnature> </additionalProjectnatures> <additionalBuildcommands> <buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand> </additionalBuildcommands> <downloadSources>true</downloadSources> <downloadJavadocs>true</downloadJavadocs> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.5.1</version> <configuration> <source>1.6</source> <target>1.6</target> <compilerArgument>-Xlint:all</compilerArgument> <showWarnings>true</showWarnings> <showDeprecation>true</showDeprecation> </configuration> </plugin> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>exec-maven-plugin</artifactId> <version>1.2.1</version> <configuration> <mainClass>org.test.int1.Main</mainClass> </configuration> </plugin> <!--mybatis生成插件--> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.2</version> <configuration> <configurationFile>${basedir}/src/main/resources/generatorConfig.xml</configurationFile> <overwrite>true</overwrite> <verbose>true</verbose> </configuration> </plugin> </plugins> </build> </project> 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2.2 webapp/*（eclipse里默认叫这个名，idea都不会默认创建）

在src中New->Directory，取名webapp。

打开Project Structure，在左边Modules中看有没有Web，没有就添加。

在Web Resources Directories中添加webapp这个路径。

在webapp中添加文件夹（根据你的开发习惯），我添加了resources,static,WEB-INF；在static中再添加css,js,images；在WEB-INF中添加jsp，和web.xml

2.2.1 webapp/WEB-INF/web.xml

做过JSP+Servlet+JavaBean等其他Java Web的人都知道这个web.xml是干嘛的。

<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <display-name>Archetype Created Web Application</display-name> <!-- Spring和mybatis的配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-mybatis.xml</param-value> </context-param> <!-- 编码过滤器 --> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <async-supported>true</async-supported> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- Spring监听器 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 防止Spring内存溢出监听器 --> <listener> <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> </listener> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>/static/*</url-pattern> </servlet-mapping> <!-- <servlet-com.shou.shouers.com.shou.shouers.mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-com.shou.shouers.com.shou.shouers.mapping> --> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.txt</url-pattern> </servlet-mapping> <error-page> <error-code>404</error-code> <location>/index.jsp</location> </error-page> <!-- Spring MVC servlet --> <servlet> <servlet-name>SpringMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> <async-supported>true</async-supported> </servlet> <servlet> <description> </description> <display-name>FileUploadServlet</display-name> <servlet-name>FileUploadServlet</servlet-name> <servlet-class>ttaiweb.controller.FileUploadServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>SpringMVC</servlet-name> <!-- 此处可以可以配置成*.do，对应struts的后缀习惯 --> <url-pattern>/</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>FileUploadServlet</servlet-name> <url-pattern>/FileUploadServlet</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>/index.jsp</welcome-file> </welcome-file-list> <!-- 配置SESSION超时，单位是分钟 --> <session-config> <session-timeout>15</session-timeout> </session-config> </web-app> 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687

你会发现这里面有些代码指向的类，文件，目录都不存在，但我想告诉你做服务端的时候Error并不会影响什么（除非不让你run了）

2.3 src/resouces/*

你可以把里面原来的东西全部删掉。

2.3.1 eneratorConfig.xml

SSM中dao，model，mapping都是靠这个生成出来的，具体怎么操作去生成后面会介绍。

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <!--suppress ALL --> <generatorConfiguration> <!-- 数据库驱动:选择你的本地硬盘上面的数据库驱动包--> <classPathEntry location="D:\spencercjh\programe\JAR\mysql-connector-java-5.1.44\mysql-connector-java-5.1.44-bin.jar"/> <context id="DB2Tables" targetRuntime="MyBatis3"> <commentGenerator> <property name="suppressDate" value="true"/> <!-- 是否去除自动生成的注释 true：是 ： false:否 --> <property name="suppressAllComments" value="true"/> </commentGenerator> <!--数据库链接URL，用户名、密码 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://{远程/本地服务器IP}:3306/shouers" userId="用户名" password="密码"> </jdbcConnection> <javaTypeResolver> <property name="forceBigDecimals" value="false"/> </javaTypeResolver> <!-- 生成模型的包名和位置--> <javaModelGenerator targetPackage="com.shou.shouers.model" targetProject="src/main/java"> <property name="enableSubPackages" value="true"/> <property name="trimStrings" value="true"/> </javaModelGenerator> <!-- 生成映射文件的包名和位置--> <sqlMapGenerator targetPackage="com.shou.shouers.mapping" targetProject="src/main/java"> <property name="enableSubPackages" value="true"/> </sqlMapGenerator> <!-- 生成DAO的包名和位置--> <javaClientGenerator type="XMLMAPPER" targetPackage="com.shou.shouers.dao" targetProject="src/main/java"> <property name="enableSubPackages" value="true"/> </javaClientGenerator> <!-- 要生成的表 tableName是数据库中的表名或视图名 domainObjectName是实体类名--> <table tableName="user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table> <table tableName="admin" domainObjectName="Admin" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table> <table tableName="activityinfo" domainObjectName="Activityinfo" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table> <table tableName="enroll" domainObjectName="Enroll" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table> </context> </generatorConfiguration> 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

2.3.2 jdbc.properties

这个文件是给mybatis的配置文件看的

driver=com.mysql.jdbc.Driver url=jdbc:mysql://{本地/远程服务器IP}:3306/shouers?useUnicode=true&characterEncoding=utf-8&useSSL=false username=用户名 password=密码 #定义初始连接数 initialSize=0 #定义最大连接数 maxActive=20 #定义最大空闲 maxIdle=20 #定义最小空闲 minIdle=1 #定义最长等待时间 maxWait=60000 1234567891011121314

2.3.3 log4j.properties

这个文件是维护日志的，对大规模的服务端来说，日志是很重要的。

#定义LOG输出级别 log4j.rootLogger=INFO,Console,File #定义日志输出目的地为控制台 log4j.appender.Console=org.apache.log4j.ConsoleAppender log4j.appender.Console.Target=System.out #可以灵活地指定日志输出格式，下面一行是指定具体的格式 log4j.appender.Console.layout = org.apache.log4j.PatternLayout log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n #文件大小到达指定尺寸的时候产生一个新的文件 log4j.appender.File = org.apache.log4j.RollingFileAppender #指定输出目录 log4j.appender.File.File = logs/shouers.log #定义文件最大大小 log4j.appender.File.MaxFileSize = 10MB # 输出所以日志，如果换成DEBUG表示输出DEBUG以上级别日志 log4j.appender.File.Threshold = ALL log4j.appender.File.layout = org.apache.log4j.PatternLayout log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n log4j.logger.com.ibatis=DEBUG log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=DEBUG log4j.logger.com.ibatis.common.jdbc.ScriptRunner=DEBUG log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=DEBUG log4j.logger.com.pro.mapper = DEBUG log4j.logger.java.sql.Connection=DEBUG log4j.logger.java.sql.Statement=DEBUG log4j.logger.java.sql.PreparedStatement=DEBUG 12345678910111213141516171819202122232425262728293031

2.3.4 spring-mvc.xml

这是Spring MVC的配置文件，你需要修改里面的包名，我建议你用ctrl-F,ctrl-R来做这些事情。

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <!-- 自动扫描该包，使SpringMVC认为包下用了@controller注解的类是控制器 --> <context:component-scan base-package="com.shou.shouers.controller" /> <!--避免IE执行AJAX时，返回JSON出现下载文件 --> <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> </list> </property> </bean> <mvc:annotation-driven/> <!-- 启动SpringMVC的注解功能，完成请求和注解POJO的映射 <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="mappingJacksonHttpMessageConverter" /> </list> </property> </bean> --> <!-- 配置静态资源，直接映射到对应的文件夹，不被DispatcherServlet处理，3.04新增功能，需要重新设置spring-mvc-3.0.xsd --> <mvc:resources mapping="/static/**" location="/static/" /> <mvc:resources mapping="/doc/**" location="/static/doc/"/> <!-- 定义跳转的文件的前后缀 ，视图模式配置-这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀，变成一个 可用的url地址--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> <!-- 配置文件上传，如果没有使用文件上传可以不用配置，当然如果不配，那么配置文件中也不必引入上传组件包 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="utf-8" /> <!-- 文件大小最大值 --> <property name="maxUploadSize" value="10485760000" /> <!-- 内存中的最大值 --> <property name="maxInMemorySize" value="40960" /> </bean> </beans> 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657

2.3.5 spring-mybatis.xml

mybatis就是在这里被配置的，和刚刚一样你需要修改包名，我再次建议你认真仔细地改，否则后面会出各种你看不懂的错误。

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <!-- 自动扫描 --> <context:component-scan base-package="com.shou.shouers.*" /> <!-- 引入配置文件 --> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="location" value="classpath:jdbc.properties" /> </bean> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${driver}" /> <property name="url" value="${url}" /> <property name="username" value="${username}" /> <property name="password" value="${password}" /> <!-- 初始化连接大小 --> <property name="initialSize" value="${initialSize}"></property> <!-- 连接池最大数量 --> <property name="maxActive" value="${maxActive}"></property> <!-- 连接池最大空闲 --> <property name="maxIdle" value="${maxIdle}"></property> <!-- 连接池最小空闲 --> <property name="minIdle" value="${minIdle}"></property> <!-- 获取连接最大等待时间 --> <property name="maxWait" value="${maxWait}"></property> </bean> <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!--自动扫描mapping.xml文件 --> <property name="mapperLocations" value="classpath:com/shou/shouers/mapping/*.xml"></property> </bean> <!-- DAO接口所在包名，Spring会自动查找其下的类 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.shou.shouers.dao" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean> <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> </beans> 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162

2.4 java

你应该知道SSM有以下文件结构:controller,dao,model,mapping,model,service,serviceimpl，一般的工程还会有util（工具包），common等等。建好文件目录后你还要把默认存在的Spring Boot的启动类删掉

2.4.1 使用mybatis-generator:generate

在IDEA中你不new一种运行项目的方式的话默认是不能运行的。

在这之前你应该先建好数据库了！

添加Maven运行方式。

Name随便取。

Command line里填写如下指令mybatis-generator:generate -e

具体怎么生成，都写在generatorConfig.xml中了。

运行。

你会发现dao、mapping、model中有东西了。

如果数据库被修改了，这些文件应该都会跟着变动，这个时候你要先把它们都删了，再生成一次，而不是直接运行生成插件！

2.4.2 编写service和serviceimpl

这里就举一个完整的例子：（这个例子中我已经扩充过一些SQL操作，并不是刚生成后的）

2.4.2.1 UserMapper .java

package com.shou.shouers.dao; import com.shou.shouers.model.User; import com.shou.shouers.model.UserKey; import java.util.List; /** * @author spencercjh * @version V2.0 * @date 2018年8月2日08:47:38 */ public interface UserMapper { /** * 查找所有的用户对象 * * @return 含有所有用户对象的列表 */ List<User> selectAll(); /** * 通过主键删除用户信息 * * @param key 用户主键对象 * @return 删除数量 */ int deleteByPrimaryKey(UserKey key); /** * 插入管理员记录 * * @param record 用户对象 * @return 插入数量 */ int insert(User record); /** * 插入管理员记录 * * @param record 用户对象 * @return 插入数量 */ int insertSelective(User record); /** * 根据主键查找用户 * * @param key 用户主键对象 * @return 用户对象 */ User selectByPrimaryKey(UserKey key); /** * 根据主键选择性地修改用户记录（只修改不为空的属性） * * @param record 用户对象 * @return 更新数量 */ int updateByPrimaryKeySelective(User record); /** * 根据主键更新用户记录（直接覆盖） * * @param record 用户对象 * @return 更新数量 */ int updateByPrimaryKey(User record); } 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768

2.4.2.2 UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > <!--suppress ALL --> <mapper namespace="com.shou.shouers.dao.UserMapper"> <resultMap id="BaseResultMap" type="com.shou.shouers.model.User"> <id column="id" property="id" jdbcType="INTEGER"/> <id column="userid" property="userid" jdbcType="VARCHAR"/> <result column="password" property="password" jdbcType="VARCHAR"/> <result column="username" property="username" jdbcType="VARCHAR"/> <result column="sex" property="sex" jdbcType="INTEGER"/> <result column="volunteer" property="volunteer" jdbcType="INTEGER"/> <result column="telephone" property="telephone" jdbcType="VARCHAR"/> <result column="openid" property="openid" jdbcType="VARCHAR"/> <result column="idcard" property="idcard" jdbcType="VARCHAR"/> <result column="shvolunteer" property="shvolunteer" jdbcType="VARCHAR"/> <result column="createtime" property="createtime" jdbcType="TIMESTAMP"/> <result column="createuser" property="createuser" jdbcType="VARCHAR"/> <result column="updatetime" property="updatetime" jdbcType="TIMESTAMP"/> <result column="updateuser" property="updateuser" jdbcType="VARCHAR"/> </resultMap> <sql id="Base_Column_List"> id, userid, password, username, sex, volunteer, telephone, openid, idcard, shvolunteer, createtime, createuser, updatetime, updateuser </sql> <select id="selectAll" resultMap="BaseResultMap"> select <include refid="Base_Column_List"/> from `user` </select> <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="com.shou.shouers.model.UserKey"> select <include refid="Base_Column_List"/> from `user` where id = #{id,jdbcType=INTEGER} and userid = #{userid,jdbcType=VARCHAR} </select> <delete id="deleteByPrimaryKey" parameterType="com.shou.shouers.model.UserKey"> delete from `user` where id = #{id,jdbcType=INTEGER} and userid = #{userid,jdbcType=VARCHAR} </delete> <insert id="insert" parameterType="com.shou.shouers.model.User"> insert into `user` (id, userid, password, username, sex, volunteer, telephone, openid, idcard, shvolunteer, createtime, createuser, updatetime, updateuser) values (#{id,jdbcType=INTEGER}, #{userid,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}, #{username,jdbcType=VARCHAR}, #{sex,jdbcType=INTEGER}, #{volunteer,jdbcType=INTEGER}, #{telephone,jdbcType=VARCHAR}, #{openid,jdbcType=VARCHAR}, #{idcard,jdbcType=VARCHAR}, #{shvolunteer,jdbcType=VARCHAR}, #{createtime,jdbcType=TIMESTAMP}, #{createuser,jdbcType=VARCHAR}, #{updatetime,jdbcType=TIMESTAMP}, #{updateuser,jdbcType=VARCHAR}) </insert> <insert id="insertSelective" parameterType="com.shou.shouers.model.User"> insert into `user` <trim prefix="(" suffix=")" suffixOverrides=","> <if test="id != null"> id, </if> <if test="userid != null"> userid, </if> <if test="password != null"> password, </if> <if test="username != null"> username, </if> <if test="sex != null"> sex, </if> <if test="volunteer != null"> volunteer, </if> <if test="telephone != null"> telephone, </if> <if test="openid != null"> openid, </if> <if test="idcard != null"> idcard, </if> <if test="shvolunteer != null"> shvolunteer, </if> <if test="createtime != null"> createtime, </if> <if test="createuser != null"> createuser, </if> <if test="updatetime != null"> updatetime, </if> <if test="updateuser != null"> updateuser, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides=","> <if test="id != null"> #{id,jdbcType=INTEGER}, </if> <if test="userid != null"> #{userid,jdbcType=VARCHAR}, </if> <if test="password != null"> #{password,jdbcType=VARCHAR}, </if> <if test="username != null"> #{username,jdbcType=VARCHAR}, </if> <if test="sex != null"> #{sex,jdbcType=INTEGER}, </if> <if test="volunteer != null"> #{volunteer,jdbcType=INTEGER}, </if> <if test="telephone != null"> #{telephone,jdbcType=VARCHAR}, </if> <if test="openid != null"> #{openid,jdbcType=VARCHAR}, </if> <if test="idcard != null"> #{idcard,jdbcType=VARCHAR}, </if> <if test="shvolunteer != null"> #{shvolunteer,jdbcType=VARCHAR}, </if> <if test="createtime != null"> #{createtime,jdbcType=TIMESTAMP}, </if> <if test="createuser != null"> #{createuser,jdbcType=VARCHAR}, </if> <if test="updatetime != null"> #{updatetime,jdbcType=TIMESTAMP}, </if> <if test="updateuser != null"> #{updateuser,jdbcType=VARCHAR}, </if> </trim> </insert> <update id="updateByPrimaryKeySelective" parameterType="com.shou.shouers.model.User"> update `user` <set> <if test="password != null"> password = #{password,jdbcType=VARCHAR}, </if> <if test="username != null"> username = #{username,jdbcType=VARCHAR}, </if> <if test="sex != null"> sex = #{sex,jdbcType=INTEGER}, </if> <if test="volunteer != null"> volunteer = #{volunteer,jdbcType=INTEGER}, </if> <if test="telephone != null"> telephone = #{telephone,jdbcType=VARCHAR}, </if> <if test="openid != null"> openid = #{openid,jdbcType=VARCHAR}, </if> <if test="idcard != null"> idcard = #{idcard,jdbcType=VARCHAR}, </if> <if test="shvolunteer != null"> shvolunteer = #{shvolunteer,jdbcType=VARCHAR}, </if> <if test="createtime != null"> createtime = #{createtime,jdbcType=TIMESTAMP}, </if> <if test="createuser != null"> createuser = #{createuser,jdbcType=VARCHAR}, </if> <if test="updatetime != null"> updatetime = #{updatetime,jdbcType=TIMESTAMP}, </if> <if test="updateuser != null"> updateuser = #{updateuser,jdbcType=VARCHAR}, </if> </set> where id = #{id,jdbcType=INTEGER} and userid = #{userid,jdbcType=VARCHAR} </update> <update id="updateByPrimaryKey" parameterType="com.shou.shouers.model.User"> update `user` set password = #{password,jdbcType=VARCHAR}, username = #{username,jdbcType=VARCHAR}, sex = #{sex,jdbcType=INTEGER}, volunteer = #{volunteer,jdbcType=INTEGER}, telephone = #{telephone,jdbcType=VARCHAR}, openid = #{openid,jdbcType=VARCHAR}, idcard = #{idcard,jdbcType=VARCHAR}, shvolunteer = #{shvolunteer,jdbcType=VARCHAR}, createtime = #{createtime,jdbcType=TIMESTAMP}, createuser = #{createuser,jdbcType=VARCHAR}, updatetime = #{updatetime,jdbcType=TIMESTAMP}, updateuser = #{updateuser,jdbcType=VARCHAR} where id = #{id,jdbcType=INTEGER} and userid = #{userid,jdbcType=VARCHAR} </update> </mapper> 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205

2.4.2.3 User.java

package com.shou.shouers.model; import java.util.Date; /** * @author spencercjh * @version V1.0 * @date 2018年8月1日23:50:19 */ public class User extends UserKey { private String password; private String username; private Integer sex; private Integer volunteer; private String telephone; private String openid; private String idcard; private String shvolunteer; private Date createtime; private String createuser; private Date updatetime; private String updateuser; public String getPassword() { return password; } public void setPassword(String password) { this.password = password == null ? null : password.trim(); } public String getUsername() { return username; } public void setUsername(String username) { this.username = username == null ? null : username.trim(); } public Integer getSex() { return sex; } public void setSex(Integer sex) { this.sex = sex; } public Integer getVolunteer() { return volunteer; } public void setVolunteer(Integer volunteer) { this.volunteer = volunteer; } public String getTelephone() { return telephone; } public void setTelephone(String telephone) { this.telephone = telephone == null ? null : telephone.trim(); } public String getOpenid() { return openid; } public void setOpenid(String openid) { this.openid = openid == null ? null : openid.trim(); } public String getIdcard() { return idcard; } public void setIdcard(String idcard) { this.idcard = idcard == null ? null : idcard.trim(); } public String getShvolunteer() { return shvolunteer; } public void setShvolunteer(String shvolunteer) { this.shvolunteer = shvolunteer == null ? null : shvolunteer.trim(); } public Date getCreatetime() { return createtime; } public void setCreatetime(Date createtime) { this.createtime = createtime; } public String getCreateuser() { return createuser; } public void setCreateuser(String createuser) { this.createuser = createuser == null ? null : createuser.trim(); } public Date getUpdatetime() { return updatetime; } public void setUpdatetime(Date updatetime) { this.updatetime = updatetime; } public String getUpdateuser() { return updateuser; } public void setUpdateuser(String updateuser) { this.updateuser = updateuser == null ? null : updateuser.trim(); } } 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130

2.4.2.4 UserKey.java

package com.shou.shouers.model; /** * @author spencercjh * @version V1.0 * @date 2018年8月1日23:50:32 */ public class UserKey { private Integer id; private String userid; public UserKey(String userid) { this.userid = userid; } public UserKey() { } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getUserid() { return userid; } public void setUserid(String userid) { this.userid = userid == null ? null : userid.trim(); } } 1234567891011121314151617181920212223242526272829303132333435

2.4.2.5 UserService.java

package com.shou.shouers.service; import com.shou.shouers.model.User; import com.shou.shouers.model.UserKey; import java.util.List; /** * @author spencercjh * @version V2.0 * @date 2018年8月2日08:47:29 */ public interface UserService { /** * 查找所有的用户对象 * * @return 含有所有用户对象的列表 */ List<User> selectAll(); /** * 通过主键删除用户信息 * * @param key 用户主键对象 * @return 删除数量 */ int deleteByPrimaryKey(UserKey key); /** * 插入管理员记录 * * @param record 用户对象 * @return 插入数量 */ int insert(User record); /** * 插入管理员记录 * * @param record 用户对象 * @return 插入数量 */ int insertSelective(User record); /** * 根据主键查找用户 * * @param key 用户主键对象 * @return 用户对象 */ User selectByPrimaryKey(UserKey key); /** * 根据主键选择性地修改用户记录（只修改不为空的属性） * * @param record 用户对象 * @return 更新数量 */ int updateByPrimaryKeySelective(User record); /** * 根据主键更新用户记录（直接覆盖） * * @param record 用户对象 * @return 更新数量 */ int updateByPrimaryKey(User record); } 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869

2.4.2.6 UserServiceImpl.java

package com.shou.shouers.serviceimpl; import com.shou.shouers.dao.UserMapper; import com.shou.shouers.model.User; import com.shou.shouers.model.UserKey; import com.shou.shouers.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; /** * @author spencercjh * @version V2.0 * @date 2018年8月2日08:47:22 */ @Service(value = "userService") public class UserServiceImpl implements UserService { private final UserMapper userMapper; @Autowired public UserServiceImpl(UserMapper userMapper) { this.userMapper = userMapper; } @Override public List<User> selectAll() { return userMapper.selectAll(); } @Override public int deleteByPrimaryKey(UserKey key) { return userMapper.deleteByPrimaryKey(key); } @Override public int insert(User record) { return userMapper.insert(record); } @Override public int insertSelective(User record) { return userMapper.insert(record); } @Override public User selectByPrimaryKey(UserKey key) { return userMapper.selectByPrimaryKey(key); } @Override public int updateByPrimaryKeySelective(User record) { return userMapper.updateByPrimaryKeySelective(record); } @Override public int updateByPrimaryKey(User record) { return userMapper.updateByPrimaryKey(record); } } 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364

2.4.2.7 user表

/* Navicat MySQL Data Transfer Source Server : 我 Source Server Version : 50722 Source Host : {本地/远程数据库IP}:3306 Source Database : shouers Target Server Type : MYSQL Target Server Version : 50722 File Encoding : 65001 Date: 2018-08-03 11:41:07 */ SET FOREIGN_KEY_CHECKS=0; -- ---------------------------- -- Table structure for `user` -- ---------------------------- DROP TABLE IF EXISTS `user`; CREATE TABLE `user` ( `id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '自增编号', `userid` varchar(32) NOT NULL COMMENT '用户名，唯一', `password` varchar(32) NOT NULL, `username` varchar(32) NOT NULL COMMENT '用户的姓名', `sex` int(1) unsigned NOT NULL DEFAULT '0' COMMENT '1为女性0位男性', `volunteer` int(1) unsigned NOT NULL DEFAULT '0' COMMENT '1表示是志愿者0表示不是', `telephone` varchar(32) NOT NULL COMMENT '手机号，必填', `openid` varchar(64) DEFAULT NULL COMMENT '微信公众号给每一个关注用户的openid', `idcard` varchar(32) NOT NULL COMMENT '身份证号，必填', `shvolunteer` varchar(32) DEFAULT NULL COMMENT '上海志愿者平台编号，可填可不填', `createtime` datetime DEFAULT NULL, `createuser` varchar(32) DEFAULT NULL, `updatetime` datetime DEFAULT NULL, `updateuser` varchar(32) DEFAULT NULL, PRIMARY KEY (`id`,`userid`), KEY `userid` (`userid`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='用户表'; -- ---------------------------- -- Records of user -- ---------------------------- 1234567891011121314151617181920212223242526272829303132333435363738394041424344

2.4.3 编写controller

controller里会负责网页的路由和接收请求接口，这里也举一个例子：（据说这里面也有争议，有些人不喜欢把大量的业务逻辑写在这里）

2.4.3.1 LoginController.java

package com.shou.shouers.controller; import com.alibaba.fastjson.JSON; import com.shou.shouers.model.Admin; import com.shou.shouers.model.AdminKey; import com.shou.shouers.model.User; import com.shou.shouers.model.UserKey; import com.shou.shouers.service.AdminService; import com.shou.shouers.service.UserService; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.ResponseBody; import javax.servlet.http.HttpServletRequest; import java.util.concurrent.ConcurrentHashMap; /** * 登录页面及相关API * * @author spencercjh * @version v3.0 * @date 2018年8月2日15:26:55 */ @Controller public class LoginController { private final Logger logger = LoggerFactory.getLogger(LoginController.class); private final UserService userService; private final AdminService adminService; @Autowired public LoginController(UserService userService, AdminService adminService) { this.userService = userService; this.adminService = adminService; } /** * 登陆页面 * * @return login.jsp */ @RequestMapping(value = "/login", method = RequestMethod.GET) public String login() { logger.info("进入登陆界面"); return "login"; } /** * 登陆接口<br> * code:200 message:登陆成功<br> * code:501 message:登陆signin API 参数为空<br> * code:502 message:登陆signin API 数字转换失败/用户用户组参数有误<br> * code:503 message:密码不正确<br> * * @param request HttpServletRequest <br>userid用户名 password密码 role用户组（1为管理员，0为普通用户 * @return JSON串 <br>{{message:"错误信息/登陆成功"},<br>{code:200/501/502/503}} */ @RequestMapping(value = "/signin", method = RequestMethod.POST, produces = "text/plain;charset=UTF-8") @ResponseBody public String signin(HttpServletRequest request) { ConcurrentHashMap<String, String> result = new ConcurrentHashMap<String, String>(); String userid; String password; String roleString; int role; try { userid = request.getParameter("userid"); password = request.getParameter("password"); roleString = request.getParameter("role"); //noinspection AlibabaUndefineMagicConstant,AlibabaUndefineMagicConstant,AlibabaUndefineMagicConstant if ("".equals(userid) || "".equals(password) || "null".equals(userid) || "null".equals(password) || "".equals(roleString) || "null".equals(roleString)) { throw new NullPointerException(); } else { logger.info("用户" + userid + "尝试登陆signin"); } } catch (NullPointerException e) { e.printStackTrace(); logger.info("登陆signin API 参数为空"); result.put("message", "登陆signin API 参数为空"); result.put("code", "501"); return JSON.toJSON(result).toString(); } try { role = Integer.parseInt(roleString); } catch (NumberFormatException e) { e.printStackTrace(); logger.info("登陆signin API 数字转换失败"); result.put("message", "登陆signin API 数字转换失败"); result.put("code", "502"); return JSON.toJSON(request).toString(); } if (role == 1) { result = adminSignin(result, userid, password); } else if (role == 0) { result = userSignin(result, userid, password); } else { logger.info("用户" + userid + "用户组参数有误"); result.put("message", "用户" + userid + "用户组参数有误"); result.put("code", "502"); } return JSON.toJSON(result).toString(); } @SuppressWarnings("Duplicates") private ConcurrentHashMap<String, String> userSignin(ConcurrentHashMap<String, String> result, String userid, String password) { User user = this.userService.selectByPrimaryKey(new UserKey(userid)); if (!user.getPassword().equals(password)) { result.put("message", "密码不正确"); result.put("code", "503"); } else { result.put("message", "登陆成功"); result.put("code", "200"); } return result; } @SuppressWarnings("Duplicates") private ConcurrentHashMap<String, String> adminSignin(ConcurrentHashMap<String, String> result, String userid, String password) { Admin admin = this.adminService.selectByPrimaryKey(new AdminKey(userid)); if (!admin.getPassword().equals(password)) { result.put("message", "密码不正确"); result.put("code", "503"); } else { result.put("message", "登陆成功"); result.put("code", "200"); } return result; } } 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135

3 尝试运行

3.1 准备一个index.jsp

按照我的配置，被路由的网页jsp都放在webapp/WEB-INF/jsp中

3.2 写一个默认路由

3.2.1 HomeController.java

package com.shou.shouers.controller; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; /** * 网站第一个页面 * * @author spencercjh * @version V2.0 * @date 2018年8月1日23:56:51 */ @Controller public class HomeController { private final Logger logger = LoggerFactory.getLogger(HomeController.class); /** * 网站首页 * * @return index.jsp */ @RequestMapping(value = "/", method = RequestMethod.GET) public String home() { logger.info("进入首页界面"); return "index"; } } 123456789101112131415161718192021222324252627282930313233

3.3 添加运行方法

Run/Debug Configuration中添加Tomcat。

Name随便取。

Application Sever配置一下。

Deployment中把项目添加进来，应该是demo:war。Application context默认是“/”，也就是访问localhost:8080/就能进入，但在eclipse中默认是localhost:8080/demo。我也没研究过怎么在eclipse中改动这个。

单击OK。

Run。

3.4 可能出现的问题

我简单列举几个。

3.4.1 服务器并没有在跑项目，而是空跑

[2018-08-03 12:17:03,403] Artifact shouers:war: Artifact is being deployed, please wait... 你一定要看到这句话，否则你的服务器运行配置就没有配置好。

3.4.2 mapping，sql等字样的错误信息

你的mapping文件系统被没有找到，观察target/classes/包名/中是否有mapping文件夹和对应的xml文件，我在pom中已经加入相关插件解决了IDEA不会在编译过程中自动把mapping文件放入taget的问题。

3.4.3 not mapping found for HTTP…………

[org.springframework.web.servlet.PageNotFound] - No mapping found for HTTP request with URI [/sad] in DispatcherServlet with name 'SpringMVC'

路由写好，写对了吗？

4 总结

按照我这样配置一般不会出什么岔子的。希望你能在使用SSM的过程中理解Spring IOC容器的DI（依赖注入），Spring MVC的MVC架构，MyBatis的实现过程与原理以及和Hibernate的区别。