springMVC+spring+Mybatis集成

8gw234 9年前發布 | 59K 次閱讀 SpringMVC JEE框架

一、小工具:

fastJson：溫少的json小工具，打印非常好用

JsonView: json查看工具

二、項目配置

1.pom.xml

注意：spring包盡量置前，防止包依賴舊版本

<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>字符集過濾器</description>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <description>字符集編碼</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監聽器</description>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- 防止spring內存溢出監聽器 -->
    <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超時時間，單位分鐘 -->
    <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/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">

    <!-- 引入屬性文件 -->
    <context:property-placeholder location="classpath:config.properties" />

    <!-- 自動掃描(自動注入) -->
    <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.xsd
http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
">

    <!-- JNDI方式配置數據源 -->
    <!-- <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName" value="${jndiName}"></property> </bean> -->

    <!-- 配置數據源 -->
    <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}" />

        <!-- 初始化連接大小 -->
        <property name="initialSize" value="0" />
        <!-- 連接池最大使用連接數量 -->
        <property name="maxActive" value="20" />
        <!-- 連接池最大空閑 -->
        <property name="maxIdle" value="20" />
        <!-- 連接池最小空閑 -->
        <property name="minIdle" value="0" />
        <!-- 獲取連接最大等待時間 -->
        <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" />

        <!-- 配置間隔多久才進行一次檢測，檢測需要關閉的空閑連接，單位是毫秒 -->
        <property name="timeBetweenEvictionRunsMillis" value="60000" />
        <!-- 配置一個連接在池中最小生存的時間，單位是毫秒 -->
        <property name="minEvictableIdleTimeMillis" value="25200000" />

        <!-- 打開removeAbandoned功能 -->
        <property name="removeAbandoned" value="true" />
        <!-- 1800秒，也就是30分鐘 -->
        <property name="removeAbandonedTimeout" value="1800" />
        <!-- 關閉abanded連接時輸出錯誤日志 -->
        <property name="logAbandoned" value="true" />

        <!-- 監控數據庫 -->
        <!-- <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" />
        <!-- 自動掃描entity目錄, 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>

    <!-- 配置事務管理器 -->
    <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" /> -->

    <!-- 攔截器方式配置事物 -->
    <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監控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">

    <!-- 自動掃描controller包下的所有類，使其認為spring mvc的控制器 -->
    <context:component-scan base-package="sy.controller" />

    <!-- 避免IE執行AJAX時,返回JSON出現下載文件 -->
    <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>text/html;charset=UTF-8</value>
            </list>
        </property>
    </bean>

    <!-- 啟動Spring MVC的注解功能，完成請求和注解POJO的映射 -->
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="mappingJacksonHttpMessageConverter" /><!-- json轉換器 -->
            </list>
        </property>
    </bean>

    <!-- 對模型視圖名稱的解析，即在模型視圖名稱添加前后綴 -->
    <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> <!-- 上傳文件大小限制為31M，31*1024*1024 -->
        </property>
        <property name="maxInMemorySize">
            <value>4096</value>
        </property>
    </bean>
</beans>

三、mybatis使用：crud操作及如何獲取關聯對象（用戶和角色通過中間表多對多關聯）

1.mybatis generator使用

1.1 generator配置：

<generatorConfiguration>
    <!-- 數據庫驅動包位置 -->
    <!-- <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>
        <!-- 數據庫鏈接URL、用戶名、密碼 -->
        <!-- <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 tuser
        where ID = #{id,jdbcType=VARCHAR}
    </select>
    <delete id="deleteByPrimaryKey" parameterType="java.lang.String">
        delete from tuser
        where 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 tuser
        set 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查詢問題 -->
    <select id="selectUserRole" parameterType="java.lang.String" resultType="sy.model.UserRole">
        SELECT
        tuser_trole.ID,
        tuser_trole.ROLE_ID,
        tuser_trole.USER_ID
        FROM
        tuser_trole
        where 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">
        SELECT
        tuser.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
        FROM
        tuser
        JOIN tuser_trole ON tuser.ID = tuser_trole.USER_ID
    </select>

    <!-- 通過中間表對象UserRole獲取角色 -->
    <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">
        SELECT
        tuser.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_text
        FROM
        tuser
        JOIN tuser_trole ON tuser.ID = tuser_trole.USER_ID
        JOIN trole ON tuser_trole.ROLE_ID = trole.ID
    </select>

    <!-- 直接獲取角色，中間表對象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">
        SELECT
        tuser.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_text
        FROM
        tuser
        JOIN tuser_trole ON tuser.ID = tuser_trole.USER_ID
        JOIN trole ON tuser_trole.ROLE_ID = trole.ID
    </select>

</mapper>

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