springMVC+spring+Mybatis集成

一、工具:

fastJson：温少的json小工具，打印非常好用

JsonView: json查看工具

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二、项目配置

    1.pom.xml

    注意：spring包尽量置前，防止包依赖旧版本

<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>sy.testmybatis</groupId><artifactId>testmybatis</artifactId><packaging>war</packaging><version>0.0.1-SNAPSHOT</version><name>testmybatis Maven Webapp</name><url>http://maven.apache.org</url><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>3.2.0.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>3.2.0.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>3.2.0.RELEASE</version></dependency><dependency>            <groupId>org.apache.maven.plugins</groupId>            <artifactId>maven-surefire-plugin</artifactId>            <version>2.17</version>            <!-- <configuration>                <testFailureIgnore>true</testFailureIgnore>            </configuration> -->        </dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.1.1</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.1.1</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.21</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version><scope>test</scope></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>0.2.9</version></dependency><dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.7.1</version></dependency><dependency><groupId>org.codehaus.jackson</groupId><artifactId>jackson-mapper-asl</artifactId><version>1.9.11</version></dependency><dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.2.2</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>3.0-alpha-1</version></dependency><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>1.2.17</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.1.26</version></dependency></dependencies><build></build></project>

2.web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"><display-name>mybatis</display-name><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring.xml,classpath:spring-mybatis.xml</param-value></context-param><filter><description>字符集过滤器</description><filter-name>encodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><description>字符集编码</description><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><listener><description>spring监听器</description><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><!-- spring mvc servlet --><servlet><description>spring mvc servlet</description><servlet-name>springMvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><description>spring mvc 配置文件</description><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>springMvc</servlet-name><url-pattern>*.do</url-pattern></servlet-mapping><welcome-file-list><welcome-file>/index.jsp</welcome-file></welcome-file-list><!-- 配置session超时时间，单位分钟 --><session-config><session-timeout>15</session-timeout></session-config></web-app>

3.spring.xml

<?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" xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.2.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-3.2.xsd"><!-- 引入属性文件 --><context:property-placeholder location="classpath:config.properties" /><!-- 自动扫描(自动注入) --><context:component-scan base-package="sy.service" /></beans>

4.spring-mybatis.xml

<?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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd"><!-- JNDI方式配置数据源 --><!-- <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName" value="${jndiName}"></property> </bean> --><!-- 配置数据源 --><bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"><property name="url" value="${jdbc_url}" /><property name="username" value="${jdbc_username}" /><property name="password" value="${jdbc_password}" /><!-- 初始化连接大小 --><property name="initialSize" value="0" /><!-- 连接池最大使用连接数量 --><property name="maxActive" value="20" /><!-- 连接池最大空闲 --><property name="maxIdle" value="20" /><!-- 连接池最小空闲 --><property name="minIdle" value="0" /><!-- 获取连接最大等待时间 --><property name="maxWait" value="60000" /><!-- <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="33" /> --><property name="validationQuery" value="${validationQuery}" /><property name="testOnBorrow" value="false" /><property name="testOnReturn" value="false" /><property name="testWhileIdle" value="true" /><!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 --><property name="timeBetweenEvictionRunsMillis" value="60000" /><!-- 配置一个连接在池中最小生存的时间，单位是毫秒 --><property name="minEvictableIdleTimeMillis" value="25200000" /><!-- 打开removeAbandoned功能 --><property name="removeAbandoned" value="true" /><!-- 1800秒，也就是30分钟 --><property name="removeAbandonedTimeout" value="1800" /><!-- 关闭abanded连接时输出错误日志 --><property name="logAbandoned" value="true" /><!-- 监控数据库 --><!-- <property name="filters" value="stat" /> --><property name="filters" value="mergeStat" /></bean><!-- myBatis文件 --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource" /><!-- 自动扫描entity目录, 省掉Configuration.xml里的手工配置 --><property name="mapperLocations" value="classpath:sy/mapping/*.xml" /></bean><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="sy.dao" /><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /></bean><!-- 配置事务管理器 --><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource" /></bean><!-- 注解方式配置事物 --><!-- <tx:annotation-driven transaction-manager="transactionManager" /> --><!-- 拦截器方式配置事物 --><tx:advice id="transactionAdvice" transaction-manager="transactionManager"><tx:attributes><tx:method name="add*" propagation="REQUIRED" /><tx:method name="append*" propagation="REQUIRED" /><tx:method name="insert*" propagation="REQUIRED" /><tx:method name="save*" propagation="REQUIRED" /><tx:method name="update*" propagation="REQUIRED" /><tx:method name="modify*" propagation="REQUIRED" /><tx:method name="edit*" propagation="REQUIRED" /><tx:method name="delete*" propagation="REQUIRED" /><tx:method name="remove*" propagation="REQUIRED" /><tx:method name="repair" propagation="REQUIRED" /><tx:method name="delAndRepair" propagation="REQUIRED" /><tx:method name="get*" propagation="SUPPORTS" /><tx:method name="find*" propagation="SUPPORTS" /><tx:method name="load*" propagation="SUPPORTS" /><tx:method name="search*" propagation="SUPPORTS" /><tx:method name="datagrid*" propagation="SUPPORTS" /><tx:method name="*" propagation="SUPPORTS" /></tx:attributes></tx:advice><aop:config><aop:pointcut id="transactionPointcut" expression="execution(* sy.service..*Impl.*(..))" /><aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" /></aop:config><!-- 配置druid监控spring jdbc --><bean id="druid-stat-interceptor" class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor"></bean><bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut" scope="prototype"><property name="patterns"><list><value>sy.service.*</value></list></property></bean><aop:config><aop:advisor advice-ref="druid-stat-interceptor" pointcut-ref="druid-stat-pointcut" /></aop:config></beans>

5. spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"     xmlns:mvc="http://www.springframework.org/schema/mvc"     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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd"><!-- 自动扫描controller包下的所有类，使其认为spring mvc的控制器 --><context:component-scan base-package="sy.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.MappingJacksonHttpMessageConverter"><property name="supportedMediaTypes"><list><value>text/html;charset=UTF-8</value></list></property></bean><!-- 启动Spring MVC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><!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/" p:suffix=".jsp" /><bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"><property name="defaultEncoding"><value>UTF-8</value></property><property name="maxUploadSize"><value>32505856</value> <!-- 上传文件大小限制为31M，31*1024*1024 --></property><property name="maxInMemorySize"><value>4096</value></property></bean></beans>

三、mybatis使用：crud操作及如何获取关联对象（用户和角色通过中间表多对多关联）

    1.mybatis generator使用

      1.1 generator配置：

<generatorConfiguration><!-- 数据库驱动包位置 --><!-- <classPathEntry location="D:\software\lib\mysql-connector-java-5.1.21.jar" /> --><classPathEntry location="C:\oracle\product\10.2.0\db_1\jdbc\lib\ojdbc14.jar" /><context id="DB2Tables" targetRuntime="MyBatis3"><commentGenerator><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://localhost:3306/sy" userId="sypro" password="sypro"> --><jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver" connectionURL="jdbc:oracle:thin:@localhost:1521:orcl" userId="msa" password="msa"></jdbcConnection><javaTypeResolver><property name="forceBigDecimals" value="false" /></javaTypeResolver><!-- 生成模型的包名和位置 --><javaModelGenerator targetPackage="sy.model" targetProject="D:\study\mybatis\src"><property name="enableSubPackages" value="true" /><property name="trimStrings" value="true" /></javaModelGenerator><!-- 生成的映射文件包名和位置 --><sqlMapGenerator targetPackage="sy.mapping" targetProject="D:\study\mybatis\src"><property name="enableSubPackages" value="true" /></sqlMapGenerator><!-- 生成DAO的包名和位置 --><javaClientGenerator type="XMLMAPPER" targetPackage="sy.dao" targetProject="D:\study\mybatis\src"><property name="enableSubPackages" value="true" /></javaClientGenerator><!-- 要生成那些表(更改tableName和domainObjectName就可以) --><table tableName="trole" domainObjectName="Role" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" /><table tableName="tuser" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" /><table tableName="tuser_trole" domainObjectName="UserRole" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" /></context></generatorConfiguration>

    1.2 generater 生成

        java -jar mybatis-generator-core-1.3.2.jar -configfile generator.xml -overwrite

    2.映射文件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" ><mapper namespace="sy.dao.UserMapper"><resultMap id="BaseResultMap" type="sy.model.User"><id column="ID" property="id" jdbcType="VARCHAR" /><result column="CREATEDATETIME" property="createdatetime" jdbcType="TIMESTAMP" /><result column="MODIFYDATETIME" property="modifydatetime" jdbcType="TIMESTAMP" /><result column="NAME" property="name" jdbcType="VARCHAR" /><result column="PWD" property="pwd" jdbcType="VARCHAR" /><result column="CREATE_TIME" property="createTime" jdbcType="DATE" /><result column="UPDATE_TIME" property="updateTime" jdbcType="DATE" /></resultMap><sql id="Base_Column_List">ID, CREATEDATETIME, MODIFYDATETIME, NAME, PWD, CREATE_TIME, UPDATE_TIME</sql><select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String">select<include refid="Base_Column_List" />from tuserwhere ID = #{id,jdbcType=VARCHAR}</select><delete id="deleteByPrimaryKey" parameterType="java.lang.String">delete from tuserwhere ID = #{id,jdbcType=VARCHAR}</delete><insert id="insert" parameterType="sy.model.User">insert into tuser (ID, CREATEDATETIME, MODIFYDATETIME,NAME, PWD, CREATE_TIME,UPDATE_TIME)values (#{id,jdbcType=VARCHAR}, #{createdatetime,jdbcType=TIMESTAMP}, #{modifydatetime,jdbcType=TIMESTAMP},#{name,jdbcType=VARCHAR}, #{pwd,jdbcType=VARCHAR}, #{createTime,jdbcType=DATE},#{updateTime,jdbcType=DATE})</insert><insert id="insertSelective" parameterType="sy.model.User">insert into tuser<trim prefix="(" suffix=")" suffixOverrides=","><if test="id != null">ID,</if><if test="createdatetime != null">CREATEDATETIME,</if><if test="modifydatetime != null">MODIFYDATETIME,</if><if test="name != null">NAME,</if><if test="pwd != null">PWD,</if><if test="createTime != null">CREATE_TIME,</if><if test="updateTime != null">UPDATE_TIME,</if></trim><trim prefix="values (" suffix=")" suffixOverrides=","><if test="id != null">#{id,jdbcType=VARCHAR},</if><if test="createdatetime != null">#{createdatetime,jdbcType=TIMESTAMP},</if><if test="modifydatetime != null">#{modifydatetime,jdbcType=TIMESTAMP},</if><if test="name != null">#{name,jdbcType=VARCHAR},</if><if test="pwd != null">#{pwd,jdbcType=VARCHAR},</if><if test="createTime != null">#{createTime,jdbcType=DATE},</if><if test="updateTime != null">#{updateTime,jdbcType=DATE},</if></trim></insert><update id="updateByPrimaryKeySelective" parameterType="sy.model.User">update tuser<set><if test="createdatetime != null">CREATEDATETIME = #{createdatetime,jdbcType=TIMESTAMP},</if><if test="modifydatetime != null">MODIFYDATETIME = #{modifydatetime,jdbcType=TIMESTAMP},</if><if test="name != null">NAME = #{name,jdbcType=VARCHAR},</if><if test="pwd != null">PWD = #{pwd,jdbcType=VARCHAR},</if><if test="createTime != null">CREATE_TIME = #{createTime,jdbcType=DATE},</if><if test="updateTime != null">UPDATE_TIME = #{updateTime,jdbcType=DATE},</if></set>where ID = #{id,jdbcType=VARCHAR}</update><update id="updateByPrimaryKey" parameterType="sy.model.User">update tuserset CREATEDATETIME = #{createdatetime,jdbcType=TIMESTAMP},MODIFYDATETIME = #{modifydatetime,jdbcType=TIMESTAMP},NAME = #{name,jdbcType=VARCHAR},PWD = #{pwd,jdbcType=VARCHAR},CREATE_TIME = #{createTime,jdbcType=DATE},UPDATE_TIME = #{updateTime,jdbcType=DATE}where ID = #{id,jdbcType=VARCHAR}</update><!-- N+1查询问题 --><select id="selectUserRole" parameterType="java.lang.String" resultType="sy.model.UserRole">SELECTtuser_trole.ID,tuser_trole.ROLE_ID,tuser_trole.USER_IDFROMtuser_trolewhere tuser_trole.user_id=#{id,jdbcType=VARCHAR}</select><resultMap type="sy.model.User" id="userResultMap" extends="BaseResultMap"><collection property="userRoles" column="ID" javaType="list" select="selectUserRole" /></resultMap><select id="getAll" resultMap="userResultMap">select ID, CREATEDATETIME, MODIFYDATETIME, NAME, PWD from tuser</select><resultMap type="sy.model.User" id="userResultMap2" extends="BaseResultMap"><collection property="userRoles" javaType="list" ofType="sy.model.UserRole"><id property="id" column="userrole_id" /><result column="role_id" property="roleId" /><result property="userId" column="user_id" /></collection></resultMap><select id="getAll2" resultMap="userResultMap2">SELECTtuser.ID,tuser.CREATEDATETIME,tuser.MODIFYDATETIME,tuser.`NAME`,tuser.PWD,tuser.CREATE_TIME,tuser.UPDATE_TIME,tuser_trole.ID userrole_id,tuser_trole.ROLE_ID role_id,tuser_trole.USER_ID user_idFROMtuserJOIN tuser_trole ON tuser.ID = tuser_trole.USER_ID</select><!-- 通过中间表对象UserRole获取角色 --><resultMap type="sy.model.User" id="userResultMap3" extends="BaseResultMap"><collection property="userRoles" javaType="list" ofType="sy.model.UserRole"><id property="id" column="userrole_id" /><result column="role_id" property="roleId" /><result property="userId" column="user_id" /><association property="role" javaType="sy.model.Role"><id property="id" column="role_id" /><result property="text" column="role_text" /></association></collection></resultMap><select id="getAll3" resultMap="userResultMap3">SELECTtuser.ID,tuser.CREATEDATETIME,tuser.MODIFYDATETIME,tuser.`NAME`,tuser.PWD,tuser.CREATE_TIME,tuser.UPDATE_TIME,tuser_trole.ID userrole_id,tuser_trole.ROLE_ID role_id,tuser_trole.USER_ID user_id,trole.ID role_id,trole.TEXT role_textFROMtuserJOIN tuser_trole ON tuser.ID = tuser_trole.USER_IDJOIN trole ON tuser_trole.ROLE_ID = trole.ID</select><!-- 直接获取角色，中间表对象UserRole --><resultMap type="sy.model.User" id="userResultMap4" extends="BaseResultMap"><collection property="roles" javaType="list" ofType="sy.model.Role"><id property="id" column="role_id" /><result property="text" column="role_text" /></collection></resultMap><select id="getAll4" resultMap="userResultMap4">SELECTtuser.ID,tuser.CREATEDATETIME,tuser.MODIFYDATETIME,tuser.`NAME`,tuser.PWD,tuser.CREATE_TIME,tuser.UPDATE_TIME,tuser_trole.ID userrole_id,tuser_trole.ROLE_ID,tuser_trole.USER_ID,trole.ID role_id,trole.TEXT role_textFROMtuserJOIN tuser_trole ON tuser.ID = tuser_trole.USER_IDJOIN trole ON tuser_trole.ROLE_ID = trole.ID</select></mapper>