Mybatis-Plus通用枚举

• Mybatis+Mybatis-Plus
• Spring+Mybatis+Mybatis-Plus
• Spring Boot+Mybatis+Mybatis-Plus
• Mybatis-Plus通用CRUD
• Mybatis-Plus配置
• Mybatis-Plus条件构造器
• Mybatis-Plus ActiveRecord模式CRUD
• Mybatis-Plus Oracle 主键Sequence
• Mybatis-Plus插件
• Mybatis-Plus Sql 注入器
• Mybatis-Plus自动填充功能
• Mybatis-Plus逻辑删除

解决了繁琐的配置，让 mybatis 优雅的使用枚举属性！

修改表结构

ALTER TABLE `tb_user` ADD COLUMN `sex` INT ( 1 ) NULL DEFAULT 1 COMMENT '1-男，2-女' AFTER `deleted`;

定义枚举

public enum SexEnum implements IEnum<Integer> {

	MAN(1, "男"), WOMAN(2, "女");

	private int value;
	private String desc;

	SexEnum(int value, String desc) {
		this.value = value;
		this.desc = desc;
	}

	@Override
	public Integer getValue() {
		return this.value;
	}

	@Override
	public String toString() {
		return this.desc;
	}

}

配置

# 枚举包扫描
mybatis-plus.type-enums-package=cn.com.javakf.enums

修改实体

private SexEnum sex; // 性别，枚举类型

测试

插入

@Test
public void testInsert() {
	User user = new User();
	user.setUserName("diaochan");
	user.setPassword("123456");
	user.setAge(20);
	user.setName("貂蝉");
	user.setMail("[email protected]");
	user.setVersion(1);
	user.setSex(SexEnum.WOMAN); // 使用的是枚举

	// 调用AR的insert方法进行插入数据
	boolean insert = user.insert();
	System.out.println("result => " + insert);
}

SQL

[main] [cn.com.javakf.mapper.UserMapper.insert]-[DEBUG] ==>  Preparing: INSERT INTO tb_user ( user_name, password, name, age, email, version, sex ) VALUES ( ?, ?, ?, ?, ?, ?, ? ) 
[main] [cn.com.javakf.mapper.UserMapper.insert]-[DEBUG] ==> Parameters: diaochan(String), 123456(String), 貂蝉(String), 20(Integer), diaochan@163.com(String), 1(Integer), 2(Integer)
[main] [cn.com.javakf.mapper.UserMapper.insert]-[DEBUG] <==    Updates: 1
 Time：43 ms - ID：cn.com.javakf.mapper.UserMapper.insert
Execute SQL：
    INSERT 
    INTO
        tb_user
        ( user_name, password, name, age, email, version, sex ) 
    VALUES
        ( 'diaochan', '123456', '貂蝉', 20, '[email protected]', 1, 2 )

[main] [org.mybatis.spring.SqlSessionUtils]-[DEBUG] Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@44550792]
result => true

查询

@Test
public void testSelectById() {
	User user = new User();
	user.setId(11L);

	User user1 = user.selectById();
	System.out.println(user1);
}

SQL

[main] [cn.com.javakf.mapper.UserMapper.selectById]-[DEBUG] ==>  Preparing: SELECT id,user_name,name,age,email AS mail,version,deleted,sex FROM tb_user WHERE id=? AND deleted=0 
[main] [cn.com.javakf.mapper.UserMapper.selectById]-[DEBUG] ==> Parameters: 12(Long)
[main] [cn.com.javakf.mapper.UserMapper.selectById]-[DEBUG] <==      Total: 1
[main] [org.mybatis.spring.SqlSessionUtils]-[DEBUG] Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@474c9131]
User(id=12, userName=diaochan, password=null, name=貂蝉, age=20, mail=diaochan@163.com, address=null, version=1, deleted=0, sex=女)

从测试可以看出，可以很方便的使用枚举了。

条件查询

@Test
public void testSelectBySex() {
	User user = new User();

	QueryWrapper<User> wrapper = new QueryWrapper<>();
	wrapper.eq("sex", SexEnum.WOMAN); // 查询性别为女的数据

	List<User> users = user.selectList(wrapper);
	for (User user1 : users) {
		System.out.println(user1);
	}
}

SQL

[main] [cn.com.javakf.mapper.UserMapper.selectList]-[DEBUG] ==>  Preparing: SELECT id,user_name,name,age,email AS mail,version,deleted,sex FROM tb_user WHERE deleted=0 AND sex = ? 
[main] [cn.com.javakf.mapper.UserMapper.selectList]-[DEBUG] ==> Parameters: 2(Integer)
[main] [cn.com.javakf.mapper.UserMapper.selectList]-[DEBUG] <==      Total: 1
 Time：15 ms - ID：cn.com.javakf.mapper.UserMapper.selectList
Execute SQL：
    SELECT
        id,
        user_name,
        name,
        age,
        email AS mail,
        version,
        deleted,
        sex 
    FROM
        tb_user 
    WHERE
        deleted=0 
        AND sex = 2

[main] [org.mybatis.spring.SqlSessionUtils]-[DEBUG] Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@3a3b10f4]
User(id=12, userName=diaochan, password=null, name=貂蝉, age=20, mail=diaochan@163.com, address=null, version=1, deleted=0, sex=女)