springboot jpa 多条件查询（多表）

前几天写的，贴上来。

实体类。

 1 package com.syl.demo.daomain;
 2 
 3 import lombok.Data;
 4 
 5 import javax.persistence.*;
 6 
 7 /**
 8  * Created by 孙义朗 on 2017/10/31.
 9  */
10 @Entity
11 @Data
12 public class User {
13     @Id
14     private String userId;
15     private String userName;
16     private String password;
17     private String gender;//性别
18     private String age;
19     @ManyToOne
20     private School school;
21     @ManyToOne
22     private Grade grade;
23 }

User