ssm实现crud

1、创建maven项目

创建maven的java web空项目后配置maven的xml文件，需要的相关jar包信息可通过https://mvnrepository.com/进行搜索。配置文件完整内容如下：

<?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>www.mk95.cn</groupId> <artifactId>ssm_crud</artifactId> <version>1.0-SNAPSHOT</version> <dependencies> <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.9.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>4.3.9.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>4.3.9.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.2</version> </dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.1</version> </dependency> <!-- https://mvnrepository.com/artifact/c3p0/c3p0 --> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>0.9.1.2</version> </dependency> <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.38</version> </dependency> <!-- https://mvnrepository.com/artifact/jstl/jstl --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> <!-- https://mvnrepository.com/artifact/junit/junit --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> </dependencies> </project>

下载jar包的时候发现很慢，将maven的conf目录下的settings.xml中<mirrors>标签内容设置如下：

<mirror> <id>alimaven</id> <name>aliyun maven</name> <url>http://maven.aliyun.com/nexus/content/groups/public/</url> <mirrorOf>central</mirrorOf> </mirror>

2、相关的配置文件

web.xml完整内容如下：

<!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配置文件--> <context-param> <param-name>contextConfigLocation</param-name> <param-value>WEB-INF/springContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!--spring MVC前端控制器--> <servlet> <servlet-name>springDispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>WEB-INF/springDispatcherServlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springDispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!--字符编码过滤器,存在多个过滤器时，这个应该在第一个--> <filter> <filter-name>CharacterEncodingFilter</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> <init-param> <param-name>forceRequestEncoding</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>forceResponseEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/</url-pattern> </filter-mapping> <!--REST风格URI--> <filter> <filter-name>HiddenHttpMethodFilter</filter-name> <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class> </filter> <filter-mapping> <filter-name>HiddenHttpMethodFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>

spring MVC配置文件完整内容如下：

<?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: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.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--spring MVC配置文件，包含网站跳转逻辑的控制--> <context:component-scan base-package="cn.mk95.www.ssm_crud.controller" use-default-filters="false"> <!--只扫描控制器--> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!--配置视图解析器，方便页面返回--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/views"/> <property name="suffix" value=".jsp"/> </bean> <!--将spring不能处理的交给tomcat，比如静态资源--> <mvc:default-servlet-handler/> <!--支持pring MVC更高级的功能，比如JSR303校验、快捷的ajac请求。。。--> <mvc:annotation-driven/> </beans>

spring 配置文件完整内容如下：

<?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:content="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!--加载数据库相关的配置文件--> <content:property-placeholder location="classpath:dbconfig.properties"/> <bean id="pooledDAtaSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.user}"/> <property name="password" value="${jdbc.password}"/> <property name="driverClass" value="${jdbc.driver}"/> </bean> <content:component-scan base-package="cn.mk95.www.ssm_crud"> <!--不扫描控制器--> <content:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </content:component-scan> <!--控制和MyBatis整合--> <bean class="org.mybatis.spring.SqlSessionFactoryBean"> <!--指定Mybatis全局配置文件路径--> <property name="configLocation" value="classpath:mybatis-config.xml"/> <property name="dataSource" ref="pooledDAtaSource"/> <!--指定mybatis的mapper文件路径--> <property name="mapperLocations" value="classpath*:/mapper/*Mapper.xml"/> </bean> <!--配置扫描器，将mybatis的接口实现加入到ioc容器--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="cn.mk95.www.ssm_crud.dao"/> </bean> <!--事务控制的配置--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="pooledDAtaSource"/> </bean> <!--基于配置的事务管理--> <aop:config> <!--切入点表达式--> <aop:pointcut id="txPoint" expression="execution(* cn.mk95.www.ssm_crud.dao..*(..))"/> <!--配置事务增强--> <aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"/> </aop:config> <!--事务增强规则--> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="*"/> <tx:method name="find*" read-only="true"/> </tx:attributes> </tx:advice> </beans>

mybatis配置文件的编写：

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <settings> <!--开启自动驼峰命名规则（camel case）映射--> <setting name="mapUnderscoreToCamelCase" value="true"/> </settings> <!--bean的别名--> <typeAliases> <package name="cn.mk95.www.ssm_crud.bean"/> </typeAliases> </configuration>

3、使用MyBatis逆向工程

在maven配置文件添加使用MyBatis逆向工程需要的jar包：

<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core --> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.5</version> </dependency>

配置逆向需要的xml文件：

<?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"> <generatorConfiguration> <context id="DB2Tables" targetRuntime="MyBatis3"> <!--配置数据库连接信息--> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/ssm_crud" userId="yyh" password="123456"> </jdbcConnection> <javaTypeResolver > <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!--指定java bean生成的位置--> <javaModelGenerator targetPackage="cn.mk95.www.ssm_crud.bean" targetProject=".\src\main\java"> <property name="enableSubPackages" value="true" /> <property name="trimStrings" value="true" /> </javaModelGenerator> <!--指定mapper文件生成位置--> <sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources"> <property name="enableSubPackages" value="true" /> </sqlMapGenerator> <!--指定dao接口生成的位置--> <javaClientGenerator type="XMLMAPPER" targetPackage="cn.mk95.www.ssm_crud.dao" targetProject=".\src\main\java"> <property name="enableSubPackages" value="true" /> </javaClientGenerator> <!--指定每个表的生成策略--> <table tableName="user" domainObjectName="User"></table> <table tableName="team" domainObjectName="Team"></table> </context> </generatorConfiguration>

运行代码生成相关文件：

package cn.mk95.www.ssm_crud.test; import org.mybatis.generator.api.MyBatisGenerator; import org.mybatis.generator.config.Configuration; import org.mybatis.generator.config.xml.ConfigurationParser; import org.mybatis.generator.exception.InvalidConfigurationException; import org.mybatis.generator.exception.XMLParserException; import org.mybatis.generator.internal.DefaultShellCallback; import java.io.File; import java.io.IOException; import java.sql.SQLException; import java.util.ArrayList; import java.util.List; public class MbgTest { public static void main(String[] args) { List<String> warnings = new ArrayList<String>(); boolean overwrite = true; File configFile = new File("mbg.xml"); ConfigurationParser cp = new ConfigurationParser(warnings); Configuration config = null; try { config = cp.parseConfiguration(configFile); } catch (IOException e) { e.printStackTrace(); } catch (XMLParserException e) { e.printStackTrace(); } DefaultShellCallback callback = new DefaultShellCallback(overwrite); MyBatisGenerator myBatisGenerator = null; try { myBatisGenerator = new MyBatisGenerator(config, callback, warnings); } catch (InvalidConfigurationException e) { e.printStackTrace(); } try { myBatisGenerator.generate(null); } catch (SQLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } } }

以上代码可通过mybatis generator官网查询。

最终生成的项目结构：