mybatis将指定列赋值到实体的HashMap属性中

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需求：将一个表中的部分列值存入到实体的HashMap属性中
表结构： 

/*
Navicat MySQL Data Transfer

Source Server Version : 50533

Target Server Type    : MYSQL
Target Server Version : 50533
File Encoding         : 65001

Date: 2013-11-01 15:34:47
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for `TEST_MAP`
-- ----------------------------
DROP TABLE IF EXISTS `TEST_MAP`;
CREATE TABLE `TEST_MAP` (
  `id` int(11) DEFAULT NULL,
  `name` varchar(20) DEFAULT NULL,
  `address` varchar(100) DEFAULT NULL,
  `telephone` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of TEST_MAP
-- ----------------------------
INSERT INTO `TEST_MAP` VALUES ('1', 'name1', 'address1', '1111');
INSERT INTO `TEST_MAP` VALUES ('2', 'name2', 'address2', '2222');

实体类：

import java.util.Map;

public class TestMap {
    private Integer id;
    private String name;
    private Map attributes;//将address和telephone的值放入其中
    
    
    public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

    public Map getAttributes() {
		return attributes;
	}

	public void setAttributes(Map attributes) {
		this.attributes = attributes;
	}

	public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

}

mapper.xml配置：

配置:

测试类：

public class TestMapServiceTest extends BaseTest {
	TestMapMapper testMapMapper = null;

	@Before
	public void setUp() {
		testMapMapper = (TestMapMapper) ctx.getBean(TestMapMapper.class);
	}

	@Test
	public void select() {
		TestMap map = testMapMapper.selectByPrimaryKey(1);
		System.out.println("name："+map.getName());
     	System.out.println("name："+map.getAttributes().get("name"));
		System.out.println("address："+map.getAttributes().get("address"));
		System.out.println("telephone："+map.getAttributes().get("telephone"));
	}

}

测试结果：

name：name1
name：null
address：address1
telephone：1111

转载于:https://my.oschina.net/ydsakyclguozi/blog/173500