Json传递数据两种方式(json大全)

时间:2024-03-04 14:20:33
1.Json传递数据两种方式(json大全)
----------------------------字符串
       var list1 = ["number","name"];
        var param = {};
        param["list1"] = list1;
        param["test"] ="java";
        var json = JSON.stringify(param);
        $.ajax({
            type: \'POST\',
            url: CTX + \'双击查看原图eckInvoice双击查看原图st\',
            data: {
                ids: json
            },
            dataType: "json",
            async:false,
            success: function(data){
                if(data.success) {
                    value = \'success\';
                    $("#table").bootstrapTable(\'refresh\');
                } else {
                    value = \'fail\';
                }
                showAlertFrame(value, data.message);
            },
            error: function (e) {
            }
        });
    };

 

    @PostMapping(value = "/list")
    @ResponseBody
    public void invoiceDetail2(String ids) {
        JSONObject jsonobject = JSONObject.parseObject(ids);
        JSONArray jsonArray = JSONArray.parseArray(jsonobject.get("list1").toString());
        List<String> list = jsonArray.toJavaList(String.class);
    }

    @PostMapping(value = "/list2")
    @ResponseBody
    public void list2(@RequestBody ScannerVo vo) {
        List<String> list = vo.getList1();
//        JSONArray jsonArray = JSONArray.parseArray(vo.getList1());
//        List<String> list = jsonArray.toJavaList(String.class);
    }

-------------------------------------对象



public class ScannerVo {

private List list1;


public List getList1() {
return list1;
}

public void setList1(List list1) {
this.list1 = list1;
}

public String getTest() {
return test;
}

public void setTest(String test) {
this.test = test;
}

private String test;


}

var getInvoice = function (invoiceCode,invoiceNum) {
var list1 = ["number","name"];
var param = {};
param["list1"] = list1;
param["test"] ="java";
var json = JSON.stringify(param);
$.ajax({
type: \'POST\',
url: CTX + \'/checkInvoice/list2\',
data: json,
dataType: "json",
async:false,
contentType: \'application/json\',
success: function(data){
if(data.success) {
value = \'success\';
$("#table").bootstrapTable(\'refresh\');
} else {
value = \'fail\';
}
showAlertFrame(value, data.message);
},
error: function (e) {

}
});

};
    @PostMapping(value = "双击查看原图st2")
    @ResponseBody
    public void list2(@RequestBody ScannerVo vo) {
        List<String> list = vo.getList1();
//        JSONArray jsonArray = JSONArray.parseArray(vo.getList1());
//        List<String> list = jsonArray.toJavaList(String.class);
    }

 





springmvc接收json数据的4种方式

ajax我经常用到,传的数据是json数据,json数据又有对象,数组。所有总结下springmvc获取前端传来的json数据方式:

1、以RequestParam接收

前端传来的是json数据不多时:[id:id],可以直接用@RequestParam来获取值

@Autowired
private AccomodationService accomodationService;

@RequestMapping(value = "/update")
@ResponseBody
public String updateAttr(@RequestParam ("id") int id) {
    int res=accomodationService.deleteData(id);
    return "success";
}

2、以实体类方式接收

前端传来的是一个json对象时:{【id,name】},可以用实体类直接进行自动绑定

@Autowired
private AccomodationService accomodationService;

    @RequestMapping(value = "/add")
    @ResponseBody
    public String addObj(@RequestBody Accomodation accomodation) {
        this.accomodationService.insert(accomodation);
        return "success";
    }
!

3、以Map接收

 

前端传来的是一个json对象时:{【id,name】},可以用Map来获取

@Autowired
private AccomodationService accomodationService;

@RequestMapping(value = "/update")
@ResponseBody
public String updateAttr(@RequestBody Map<String, String> map) {
    if(map.containsKey("id"){
        Integer id = Integer.parseInt(map.get("id"));
    }
    if(map.containsKey("name"){
        String objname = map.get("name").toString();
    }
    // 操作 ...
    return "success";
}

4、以List接收

当前端传来这样一个json数组:[{id,name},{id,name},{id,name},...]时,用List<E>接收

@Autowired
private AccomodationService accomodationService;

@RequestMapping(value = "/update")
@ResponseBody
public String updateAttr(@RequestBody List<Accomodation> list) {
    for(Accomodation accomodation:list){
        System.out.println(accomodation.toString());
    }
    return "success";
}

 


 


 


 


 

 

Springmvc接受json参数总结

关于springmvc的参数我觉得是个头痛的问题,特别是在测试的时候,必须要正确的注解和正确的contype-type 后端才能被正确的请求到,否则可能报出400,415等等bad request。
1,最简单的GET方法,参数在url里面,比如:
@RequestMapping(value = “/artists/{artistId}”, method = {RequestMethod.GET})
@PathVariable去得到url中的参数。
public Artist getArtistById(@PathVariable String artistId)
2,GET方法,参数接在url后面。

@RequestMapping(value = "/artists", method = {RequestMethod.GET})
  public ResponseVO getAllArtistName(
                         @RequestParam(name = "tagId", required = false) final String tagId) 

访问的时候/artists?tagId=1
@RequestParam相当于request.getParameter(“”)

3,POST方法,后端想得到一个自动注入的对象

@RequestMapping(value = "/addUser", method = {RequestMethod.POST})
    public void addUser(@RequestBody UserPO users){

 

 

这里要注意@RequestBody,它是用来处理前台定义发来的数据Content-Type: 不是application/x-www-form-urlencoded编码的内容,例如application/json, application/xml等;我们使用@RequestBody注解的时候,前台的Content-Type必须要改为application/json,如果没有更改,前台会报错415(Unsupported Media Type)。后台日志就会报错Content type ‘application/x-www-form-urlencoded;charset=UTF-8’ not supported
如果是表单提交 Contenttype 会是application/x-www-form-urlencoded,可以去掉@RequestBody注解
---------------------

 

这时聪明的spring会帮我按照变量的名字自动注入,但是这是很容易遇到status=400
 
<html><body><h1>Whitelabel Error Page</h1><p>This application has no explicit mapping for /error, so you are seeing this as a fallback.</p><div id=\'created\'>Tue Feb 06 16:49:34 GMT+08:00 2018</div><div>There was an unexpected error (type=Bad Request, status=400).</div><div>Validation failed for object=&#39;user&#39;. Error count: 1</div></body></html>1
这是springboot的报错,原因是bean中有不能注入的变量,因为类型的不一样,一般是date和int的变量,所以在使用的时候要特别注意。
---------------------

 

如果前端使用的$.ajax来发请求,希望注入一个bean。这时又有坑了,代码如下:

$.ajax({
                headers: {
                    Accept: "application/json; charset=utf-8"
                },
                method : \'POST\',
                url: "http://localhost:8081/user/saveUser",
                contentType: \'application/json\',
                dataType:"json",
                data: json,
                //async: false, //true:异步,false:同步
                //contentType: false,
                //processData: false,
                success: function (data) {
                    if(data.code == "000000"){
                        alert(data.desc);
                        window.location.href="http://localhost:8081/login.html";
                    }
                },
                error: function (err) {
                    alert("error");

                }});
--------------------- 

马上就报错了:
**error
:
“Bad Request”
exception
:
“org.springframework.http.converter.HttpMessageNotReadableException”
message
:
“JSON parse error: Unrecognized token ‘name’: was expecting ‘null’, ‘true’, ‘false’ or NaN; nested exception is com.fasterxml.jackson.core.JsonParseException: Unrecognized token ‘name’: was expecting ‘null’, ‘true’, ‘false’ or NaN↵ at [Source: java.io.PushbackInputStream@7fc056ba; line: 1, column: 6]”
path
:
“/user/saveUser”
status
:
400
timestamp
:
1518094430114**
这是看看发送的参数:

 


 
居然不是我拼装好的json,
data: json,  改成 data: JSON.stringify(json),后端接收json String,json只是个对象,所以解析不了!
---------------------

 4,POST方法,需要得到一个List的类型
@RequestMapping(value = “/addUser”, method = {RequestMethod.POST})
    public void addUser(@RequestBody List users){
---------------------

5,POST方法,后台需要得到一个List类型。

@RequestMapping(value = "/getPlayURL", method = {RequestMethod.POST})
    @ResponseBody
    public List<Song> getPlayUrlBySongIds(
            @RequestParam(name = "songId",required = false) List<String> songIdList) {
--------------------- 

 

 








004-SpringMVC-如何接收各种参数(普通参数,对象,JSON, URL)

在交互的过程中,其中一个关键的节点就是获取到客户端发送过来的请求参数,本篇文章,我们来罗列下SpringMVC对于各种数据的获取方式:说明:以下重点在讲解如何获取参数上,所以返回的数据不是重点1,普通方式,请求参数名跟Controller的方法参数一致1.1 创建Controller
--------------------- 

1.2 发送请求做测试(由于方法没有限制请求方式,所以get和post均可)

 

2,当请求参数过多时,以对象的方式传递

2.1 创建一个类,包含多个参数(简单不附带图了)

2.2 前台传递参数的方式不变

2.3 后台接收参数的方法

 

原因很简单,是因为SpringMVC默认是没有对象转换成json的转换器,所以需要手动添加jackson依赖。<dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.8.8</version></dependency>
---------------------

3,当请求参数名跟方法参数名不一致时,@RequestParam

4,当需要传递Json格式的数据是,@RequestBody

4.1 前台传递的方式是json

 

 

 5,通过URL的方式传递参数