1.mybatis高階查詢

當實體類與表中欄位完全一致時，mapper檔案裡返回型別用resultType，否則要用resultMap,並且建立resultMap對映

package com.rf.domain;

import java.util.Date;

public class User {
//    `id` INT(11) NOT NULL AUTO_INCREMENT,
    private  int id;
//`username` VARCHAR(32) NOT NULL COMMENT '使用者名稱稱',
    private String usernameabc;
//`birthday` DATETIME DEFAULT NULL COMMENT '生日',
 

    private Date birthdayabc;
//`sex` CHAR(1) DEFAULT NULL COMMENT '性別',
    private String sexabc;
//`address` VARCHAR(256) DEFAULT NULL COMMENT '地址',PRIMARY KEY (`id`)
    private String addressbc;

   //getter and setter 省略
}

public interface UserMapper {
public List<User> findAllResultMap();
}
 

<resultMap id="userResultMap" type="user">
<id column="uid" property="id"></id>
<result column="NAME" property="username"></result>
<result column="PASSWORD" property="username"></result>
</resultMap>
<select id="findAllResultMap" resultMap="userResultMap">
SELECT id AS uid,username AS NAME,password AS PASSWORD FROM USER
 
</select>