Mapper.xml中的resultMap

1.实体类

    class Company{
        private String c_id ;
        private String c_name ;
        private String c_address ;
        private String c_type ;
        private Dept dept =new Dept();//记得new 不然xml文件会报null
        private Role role =new Role();//记得new 不然xml文件会报null
        .....
    }
    class Dept{
        private String d_id ;
        private String d_name ;
        private String d_num ;
        .....
    }
    class Role{
        private String r_id ;
        private String r_name ;
        private String r_num ;
        .....
    }
    

2.xxMapper.xml中的Map写法

　　<resultMap ik="companyMap" type="com.ss.syf.domain.Company">
                <id column="c_id" property="c_id"/>                 
                <result column="c_name" property="c_name"/>    
                <result column="c_address" property="c_address"/>    
                <result column="c_type" property="c_type"/>       
        <collection property="dept" ofType="com.ss.syf.domain.Dept">
                <id column="d_id" property="d_id"/>
                <result column="d_name" property="d_name"/>
                <result column="d_num" property="d_num"/>
        </collection>
        <collection property="role" ofType="com.ss.syf.domain.Role">
                <id column="r_id" property="r_id"/>
                <result column="r_name" property="r_name"/>
                <result column="r_num" property="r_num"/>
        </collection>
    </resultMap>