eclipse构建maven项目整合SSM(spring+springMVC+mybatis)框架

xiaoxiao2021-02-28  8

maven整合SSM

转载请注明出处

0x00 开发环境

Windows 7Eclipse Java EE IDE for Web Developers Mars.2 Release (4.5.2)Maven 3.2.2Spring 4.0.2Mybatis 3.2.6Tomcat 7.0Log4j 1.2.7MySQL 5.7.17

版本虽然不是太重要,建议注意一下

0x01 简介

本文是在整合SSM框架的时候的一些笔记。项目采用maven构建,整合了SSM框架,集成了log4j和mysql。

0x02 创建项目

选择菜单:

File -> New -> Other -> Maven -> Maven Project

点击 Next >,再点击Next >

然后Next >

然后点击 Finish,就生成项目了。如下图一样。

是不是发现没有 src/main/java 目录,没关系,创建一个。

选中项目 ,然后选择New -> Folder

注意选择 main 目录

小提示:如果你不小心又把 java 目录给删除了,那么上面这个方法就不行了。

创建方法:选中项目 ,然后选择New -> Source Folder

建议你删除项目重新创建,因为我没有试过这种方法。

0x03 添加pom依赖

直接上代码:

<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>cn.com.zdr</groupId> <artifactId>ssmR</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>ssmR Maven Webapp</name> <url>http://maven.apache.org</url> <properties> <!-- spring版本号 --> <spring.version>4.0.2.RELEASE</spring.version> <!-- mybatis版本号 --> <mybatis.version>3.2.6</mybatis.version> <!-- log4j日志文件管理包版本 --> <slf4j.version>1.7.7</slf4j.version> <log4j.version>1.2.17</log4j.version> </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>1.2.2</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>5.1.36</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>log4j</groupId> <artifactId>log4j</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 --> <!-- JSON --> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.13</version> </dependency> </dependencies> <build> <finalName>ssmR</finalName> </build> </project>

0x04 配置 springMVC

在resources创建spring-mvc.xml,内容如下:

<?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"> <!-- 解决中文乱码,必须放在<mvc:annotation-driven>之前 --> <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.StringHttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/plain;charset=UTF-8</value> <value>text/html;charset=UTF-8</value> <value>applicaiton/javascript;charset=UTF-8</value> </list> </property> </bean> </list> </property> </bean> <!-- 使用注解式注入 --> <context:annotation-config /> <!-- 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.zdr.ssmR" /> <!-- 扩充了注解驱动,可以将请求参数绑定到控制器参数 --> <mvc:annotation-driven/> <!--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.MappingJacksonHttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> <value>application/json; charset=UTF-8</value> <value>application/x-www-form-urlencoded; charset=UTF-8</value> </list> </property> </bean> <!-- 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" /> <!-- JSON转换器 --> </list> </property> </bean> <!-- 配置ViewResolver 。使用order属性排序。 InternalResourceViewResolver 放在最后--> <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver"> <property name="order" value="1"></property> <property name="mediaTypes"> <map> <!-- 告诉视图解析器,返回的类型为json格式 --> <entry key="json" value="application/json" /> <entry key="xml" value="application/xml" /> <entry key="htm" value="text/htm" /> </map> </property> <property name="defaultViews"> <list> <!-- ModelAndView里的数据变成JSON --> <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" /> </list> </property> <property name="ignoreAcceptHeader" value="true"></property> </bean> <!-- 定义跳转的文件的前后缀 ,视图模式配置--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 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 --> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> </beans>

需要注意 <context:component-scan base-package="com.zdr.ssmR" /> 你创建的所有包的前缀要跟这个一致(当然,也可以不一致,但是要配置多个),所以可能跟我的不一样。

我们现在创建一个包,com.zdr.ssmR.controller,创建一个Controller。 代码如下:

package com.zdr.ssmR.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.ResponseBody; @Controller public class HelloController { @RequestMapping(value = "/hello") @ResponseBody public String hello(){ return "hello world"; } }

修改 src/main/webapp/WEB-INF/web.xml 文件,内容如下:

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" > <web-app> <display-name>Archetype Created Web Application</display-name> <!-- Spring MVC servlet --> <servlet> <servlet-name>mvc</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> </servlet> <servlet-mapping> <servlet-name>mvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>

注意:classpath:spring-mvc.xml 中的classpath是刚刚创建的xml文件,文件名是你自己创建的。

启动一下,然后访问 http://localhost:8080/ssmR/hello,不出错的话会出现下面的结果:

OK!继续下一步。

0x05 添加log4j

在 src/main/resources 下创建 log4j.properties,内容如下,中文在eclipse下可能会显示不出来,不用担心,不影响项目。

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/ssmR.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

修改 HelloController.java,内容如下:

package com.zdr.ssmR.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.ResponseBody; @Controller public class HelloController { private static Logger log=LoggerFactory.getLogger(HelloController.class); @RequestMapping(value = "/hello") @ResponseBody public String hello(){ log.info("测试 log配置"); return "hello world"; } }

再运行一下,访问 http://localhost:8080/ssmR/hello,看看控制台有没有输出,配置的路径下有没有产生log文件。

0x06 配置JDBC

创建数据库:

CREATE DATABASE ssmR CHARACTER SET utf8;

创建表:

CREATE TABLE user( id INTEGER PRIMARY KEY AUTO_INCREMENT, name VARCHAR(50), money INTEGER, );

别忘了插入几条数据。

在 src/main/resources 下创建 jdbc.properties,内容如下,同样中文也是显示不出来,不影响项目。

driver=com.mysql.jdbc.Driver url=jdbc:mysql://localhost:3306/ssmR username=root password=root #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

username、password字段就不要用我的了

0x07 构建 MVC项目框架

我们开发一个通过名字查找信息的接口,入参是一个名字,出参是名字和对应的金额。

创建 com.zdr.ssmR.domain 包,在该包下创建 User.java,内容如下:

package com.zdr.ssmR.domain; import java.io.Serializable; public class User implements Serializable { /***/ private Integer id; /***/ private String name; /***/ private Integer money; private static final long serialVersionUID = 1L; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getMoney() { return money; } public void setMoney(Integer money) { this.money = money; } }

创建 com.zdr.ssmR.dao 包,在该包下创建 IUserDao.java,内容如下:

package com.zdr.ssmR.dao; import com.zdr.ssmR.domain.User; public interface IUserDao { User selectByName(String name); }

创建 com.zdr.ssmR.mapping 包,在该包下创建 UserMapper.xml,内容如下:

<?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" > <mapper namespace="com.zdr.ssmR.dao.IUserDao"> <resultMap id="BaseResultMap" type="com.zdr.ssmR.domain.User"> <id column="id" property="id" jdbcType="INTEGER" /> <result column="name" property="name" jdbcType="VARCHAR" /> <result column="money" property="money" jdbcType="INTEGER" /> </resultMap> <sql id="Base_Column_List"> id, name, money </sql> <select id="selectByName" resultMap="BaseResultMap" parameterType="java.lang.String"> select <include refid="Base_Column_List" /> from user where name = #{name,jdbcType=VARCHAR} </select> </mapper>

select id 的值要跟接口的方法一致

创建 com.zdr.ssmR.service 包,在该包下创建 UserService.java,内容如下:

package com.zdr.ssmR.service; import com.zdr.ssmR.domain.User; public interface UserService { User getUserByName(String name); }

创建 com.zdr.ssmR.service.impl 包,在该包下创建 UserServiceImpl.java,内容如下:

package com.zdr.ssmR.service.impl; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.zdr.ssmR.dao.IUserDao; import com.zdr.ssmR.domain.User; import com.zdr.ssmR.service.UserService; @Service public class UserServiceImpl implements UserService{ @Autowired IUserDao userDao; public User getUserByName(String name) { return userDao.selectByName(name); } }

修改 HelloController.java,内容如下:

package com.zdr.ssmR.controller; 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.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import com.zdr.ssmR.domain.User; import com.zdr.ssmR.service.UserService; @Controller public class HelloController { private static Logger log=LoggerFactory.getLogger(HelloController.class); @Autowired UserService userService; @RequestMapping(value = "/hello") @ResponseBody public String hello(){ log.info("测试 log配置"); return "hello world"; } @RequestMapping(value = "/user/{name}") @ResponseBody public String helloUser(@PathVariable("name")String name){ User user = userService.getUserByName(name); return "hello "+user.getName()+",金额:"+user.getMoney(); } }

我是不会告诉你 mybaits 有一个逆向生成工具叫 mybatis-generator-core-1.3.2.jar 的

0x08 创建 spring-mybaits.xml文件

在 src/main/resources 下创建 spring-mybaits.xml,内容如下:

<?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.zdr.ssmR" /> <!-- 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/zdr/ssmR/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.zdr.ssmR.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>

修改 src/main/webapp/WEB-INF/web.xml 文件,内容如下:

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" > <web-app> <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> <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> <listener> <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> </listener> <!-- Spring MVC servlet --> <servlet> <servlet-name>mvc</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> </servlet> <servlet-mapping> <servlet-name>mvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>

访问http://localhost:8080/ssmR/user/zdr 试试吧。 结果如下:


0x09 Other

完整项目在这里

不采用maven构建的ssm例子在这里

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