mybatis框架使用resultMap实现高级结果映射，collection属性的使用

需求：获取指定用户的用户信息和地址列表  

修改user实体类  添加集合的引用。

/**
* 根绝用户id,获取该角色下的地址信息
* @param userID
* @return
*/
public User getUserListAddressByUserID(@Param("userID")Integer userID);

<resultMap type="User" id="userAddressList">
<id property="id" column="id"/>
<result property="userCode" column="userCode" />
<result property="userName" column="userName" />
<result property="userRole" column="userRole" />
<!--User类中引用的List集合类 同样为了复用，也可以将collection的映射结果使用resultMap元素提到外边，这个和association的用法是相同的 -->
<collection property="addressList" ofType="Address">
<id property="id" column="b_id"/>
<result property="contact" column="contact" />
<result property="addressDesc" column="addressDesc" />
<result property="tel" column="tel" />
</collection>
</resultMap>
<select id="getUserListAddressByUserID" resultMap="userAddressList" parameterType="Integer">
SELECT a.*,b.id as b_id,b.contact,b.addressdesc,b.tel from smbms_user a,smbms_address b where a.id=b.userid and a.id=#{userID}
</select>

package cn.smbms.pojo;

import java.util.Date;
import java.util.List;

public class User {
    private Integer id; //id 
    private String userCode; //用户编码
    private String userName; //用户名称
    private String userPassword; //用户密码
    private Integer gender;  //性别
    private Date birthday;  //出生日期
    private String phone;   //电话
    private String address; //地址
    private Integer userRole;    //用户角色
    private Integer createdBy;   //创建者
    private Date creationDate; //创建时间
    private Integer modifyBy;     //更新者
    private Date modifyDate;   //更新时间
    private Role role;//用户角色
    private List<Address> addressList;//一个用户有多个地址列表
    
    
    
    public List<Address> getAddressList() {
        return addressList;
    }
    public void setAddressList(List<Address> addressList) {
        this.addressList = addressList;
    }
    public Role getRole() {
        return role;
    }
    public void setRole(Role role) {
        this.role = role;
    }
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getUserCode() {
        return userCode;
    }
    public void setUserCode(String userCode) {
        this.userCode = userCode;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getUserPassword() {
        return userPassword;
    }
    public void setUserPassword(String userPassword) {
        this.userPassword = userPassword;
    }
    public Integer getGender() {
        return gender;
    }
    public void setGender(Integer gender) {
        this.gender = gender;
    }
    public Date getBirthday() {
        return birthday;
    }
    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public Integer getUserRole() {
        return userRole;
    }
    public void setUserRole(Integer userRole) {
        this.userRole = userRole;
    }
    public Integer getCreatedBy() {
        return createdBy;
    }
    public void setCreatedBy(Integer createdBy) {
        this.createdBy = createdBy;
    }
    public Date getCreationDate() {
        return creationDate;
    }
    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }
    public Integer getModifyBy() {
        return modifyBy;
    }
    public void setModifyBy(Integer modifyBy) {
        this.modifyBy = modifyBy;
    }
    public Date getModifyDate() {
        return modifyDate;
    }
    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }
}

@Test
    public void testGetUserListAddressByUserId(){
        SqlSession sqlSession = null;
        List<User> userList = new ArrayList<User>();
        User user=new User();
        try {
            sqlSession = MyBatisUtil.createSqlSession();
            
        
            user = sqlSession.getMapper(UserMapper.class).getUserListAddressByUserID(1);
            
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }finally{
            MyBatisUtil.closeSqlSession(sqlSession);
        }
        //去掉role类的属性是可以的
19         logger.debug("testGetUserListByRoleId roleid: " + user.getUserCode() + " and userName: " + user.getUserName()+"and userRoleName:"+11111111);
20         //这种写法控制台一行日志是输不出来的，因为用到了Role类中的属性
21         //    logger.debug("testGetUserListByRoleId roleid: " + user.getUserCode() + " and userName: " + user.getUserName()+"and userRoleName:"+user.getRole().getRoleName());
22             for(Address address: user.getAddressList()){
23                 logger.debug("testGetUserListAddressByUserId contact: " + address.getContact() + " and addressDesc: " + address.getAddressDesc()+"and tel:"+address.getTel());
24             }
        
    }