MyBatis中解决实体类属性和数据库表的列名不一致的操作

package com.domain;
import java.io.Serializable;
import java.util.Date;
public class User implements Serializable{
    private Integer userId;
    private String userName;
    private Date userBirthday;
    private String userSex;
    private String userAddress;
    public Integer getUserId() {
        return userId;
    }
    public void setUserId(Integer userId) {
        this.userId = userId;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public Date getUserBirthday() {
        return userBirthday;
    }
    public void setUserBirthday(Date userBirthday) {
        this.userBirthday = userBirthday;
    }
    public String getUserSex() {
        return userSex;
    }
    public void setUserSex(String userSex) {
        this.userSex = userSex;
    }
    public String getUserAddress() {
        return userAddress;
    }
    public void setUserAddress(String userAddress) {
        this.userAddress = userAddress;
    }
    @Override
    public String toString() {
        return "User [userId=" + userId + ", userName=" + userName + ", userBirthday="
                + userBirthday + ", userSex="
                + userSex + ", userAddress=" + userAddress + "]";
    }
}

使用别名查询
<!-- 配置查询所有操作 -->
<select id="findAll" resultType="com.itheima.domain.User">
select id as userId,username as userName,birthday as userBirthday,
sex as userSex,address as userAddress from user
</select>

<resultMap type="com.itheima.domain.User" id="userMap">
<id column="id" property="userId"/>
<result column="username" property="userName"/>
<result column="sex" property="userSex"/>
<result column="address" property="userAddress"/>
<result column="birthday" property="userBirthday"/>
</resultMap>

<select id="findAll" resultMap="userMap">
select * from user
</select>