Batis MyBatis关联查询示例

MyBatis关联查询示例：
 
[html] 
<resultMap type="UserView" id="userAndRoleViewResultMap"> 
    <id column="user_id" property="userId"/> 
    <result column="loginname" property="loginname"/> 
    <result column="username" property="username"/> 
    <result column="password" property="password"/> 
    <result column="user_rights" property="rights"/> 
    <result column="status" property="status"/> 
    <result column="last_login" property="lastLogin"/> 
    <association property="role" column="role_id" javaType="Role"> 
        <id column="role_id" property="roleId"/> 
        <result column="role_name" property="roleName"/> 
        <result column="role_rights" property="rights"/> 
    </association> 
</resultMap> 

[sql] 
<select id="listPageUser" parameterType="User" resultMap="userAndRoleResultMap"> 
        select u.user_id,u.username,u.loginname,u.password,r.role_id,r.role_name ,u.last_login 
        from tb_user u  
        left join tb_role r on u.role_id=r.role_id  
        where u.status=0  
        <if test="loginname!=null and loginname!=''"> 
            and u.loginname like "%"#{loginname}"%"  
        </if> 
        <if test="roleId!=null and roleId!=0"> 
            and u.role_id=#{roleId}  
        </if> 
        <if test="lastLoginStart!=null"> 
        and u.last_login>=#{lastLoginStart}  
        </if> 
        <if test="lastLoginEnd!=null"> 
        and u.last_login<=#{lastLoginEnd}  
        </if> 
    </select>