⭐MybatisPlus学习笔记⭐（七）实现自动填充功能

2、实现自动填充功能

==1、为需要自动填充的属性添加注解 @TableField==

@TableField(fill = FieldFill.INSERT)  //插入时填充
private String email;

@TableField(fill = FieldFill.INSERT_UPDATE)   //插入和修改时都填充
private String lastName;

==2、实现字段填充控制器，编写自定义填充规则==

实现元对象处理器接口：com.baomidou.mybatisplus.core.handlers.MetaObjectHandler

@Component
public class MyHandler implements MetaObjectHandler {

    //insert
    @Override
    public void insertFill(MetaObject metaObject) {
        this.setFieldValByName("lastName","lastName自动填充插入",metaObject);
        this.setFieldValByName("email","email自动填充插入",metaObject);
    }

    //update操作时要填充的字段
    @Override
    public void updateFill(MetaObject metaObject) {
        this.setFieldValByName("email","email自动填充修改",metaObject);
    }


}

=、插入测试

@Autowired
EmployeeMapper employeeMapper;


@Test
void contextLoads() {
    Employee employee = new Employee();
    employee.setAge(19);
    employee.setGender(0);

    int insert = employeeMapper.insert(employee);
    System.out.println(insert);
}

3、更新测试

@Autowired
EmployeeMapper employeeMapper;


@Test
void contextLoads() {
    Employee employee = new Employee();
    employee.setAge(19);

    int update = employeeMapper.update(employee,new QueryWrapper<Employee>().eq("gender",1));
    System.out.println(update);
}

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