实体对象 主键IdType要设置为AUTO 表示数据库ID自增

@Data@EqualsAndHashCode(callSuper = false)@Accessors(chain = true)public class Employee implements Serializable { private static final long serialVersionUID = 1L; @TableId(value = "id", type = IdType.AUTO) private Integer id; private String lastName; private String email; private Integer gender; private Integer age;}

返回的实体就会包含主键值

@PostMapping("add")@ResponseBodypublic Employee addEmployee() { Employee employee = new Employee(); employee.setLastName("chen").setAge(18).setEmail("10000@qq.com").setGender(1); employeeService.saveOrUpdate(employee); return employee;}

或者mapper层使用insert方法也会返回主键

@Overridepublic Employee saveEmp(Employee employee) { baseMapper.insert(employee); return employee;}

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