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Jpa 报错：HTTP Status 400

一、问题描述

使用Springboot JPA 做分页查询，报错Required String parameter 'xx' is not present，后端未接受到请求

二、解决方案：

使用的请求方法是GetMapping，这时候传不了参数，需要改为PostMapping才会有效

错误源码：

注意注解：@GetMapping

 1 package com.easylab.rentshop.controller;
 2 
 3 import com.easylab.rentshop.base.BaseResource;
 4 import com.easylab.rentshop.service.DepartmentService;
 5 import org.springframework.beans.factory.annotation.Autowired;
 6 import org.springframework.data.domain.Page;
 7 import org.springframework.web.bind.annotation.*;
 8 
 9 import java.util.Map;
10 
11 /******************************
12  * @author : liuyang
13  * <p>ProjectName:rent-shop  </p>
14  * @ClassName :  DepartmentController
15  * @date : 2018/6/13 0013
16  * @time : 15:31
17  * @createTime 2018-06-13 15:31
18  * @version : 2.0
19  * @description :
20  *
21  *
22  *
23  *******************************/
24 
25 @RestController
26 @RequestMapping("department")
27 public class DepartmentController {
28 
29 
30     @Autowired
31     private DepartmentService departmentService;
32 
33 
34     /**
35      * @param pageStr
36      * @param pageSizeStr
37      * @return Page
38      * <p>
39      * <p>
40      * required和defaultValue设置当请求没有参数的时候，默认设置参数值为1
41      * 采用String类型接受，防止传入abc这种情况导致程序死掉
42      */
43     @GetMapping("/departmentPage")
44     public Object departmentPage(@RequestParam(value = "pageStr", required = false, defaultValue = "1") String pageStr,
45                                  @RequestParam(value = "pageSizeStr") String pageSizeStr) {
46 
47         int pageNo = 1;
48 
49         try {
50             pageNo = Integer.valueOf(pageStr);
51 
52             if (pageNo < 1) {
53                 pageNo = 1;
54             }
55         } catch (Exception e) {
56         }
57 
58         int pageSize = 0;
59 
60         try {
61             pageSize = Integer.valueOf(pageSizeStr);
62 
63             if (pageSize < 1) {
64                 pageSize = 5;
65             }
66         } catch (Exception e) {
67         }
68 
69         Page page = departmentService.getPage(pageNo, pageSize);
70 
71         return new BaseResource(page);
72     }
73 
74 
75 }

View Code

修改后：

 1 package com.easylab.rentshop.controller;
 2 
 3 import com.easylab.rentshop.base.BaseResource;
 4 import com.easylab.rentshop.service.DepartmentService;
 5 import org.springframework.beans.factory.annotation.Autowired;
 6 import org.springframework.data.domain.Page;
 7 import org.springframework.web.bind.annotation.*;
 8 
 9 import java.util.Map;
10 
11 /******************************
12  * @author : liuyang
13  * <p>ProjectName:rent-shop  </p>
14  * @ClassName :  DepartmentController
15  * @date : 2018/6/13 0013
16  * @time : 15:31
17  * @createTime 2018-06-13 15:31
18  * @version : 2.0
19  * @description :
20  *
21  *
22  *
23  *******************************/
24 
25 @RestController
26 @RequestMapping("department")
27 public class DepartmentController {
28 
29 
30     @Autowired
31     private DepartmentService departmentService;
32 
33 
34     /**
35      * @param pageStr
36      * @param pageSizeStr
37      * @return Page
38      * <p>
39      * <p>
40      * required和defaultValue设置当请求没有参数的时候，默认设置参数值为1
41      * 采用String类型接受，防止传入abc这种情况导致程序死掉
42      */
43     @PostMapping("/departmentPage")
44     public Object departmentPage(@RequestParam(value = "pageStr", required = false, defaultValue = "1") String pageStr,
45                                  @RequestParam(value = "pageSizeStr") String pageSizeStr) {
46 
47         int pageNo = 1;
48 
49         try {
50             pageNo = Integer.valueOf(pageStr);
51 
52             if (pageNo < 1) {
53                 pageNo = 1;
54             }
55         } catch (Exception e) {
56         }
57 
58         int pageSize = 0;
59 
60         try {
61             pageSize = Integer.valueOf(pageSizeStr);
62 
63             if (pageSize < 1) {
64                 pageSize = 5;
65             }
66         } catch (Exception e) {
67         }
68 
69         Page page = departmentService.getPage(pageNo, pageSize);
70 
71         return new BaseResource(page);
72     }
73 
74 
75 }

View Code

使用PostMan进行接口测试：

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原文地址：https://www.cnblogs.com/liuyangfirst/p/9178664.html

Jpa 报错 ：HTTP Status 400

Jpa 报错：HTTP Status 400