json相关_${json.}-优快云博客

本文链接：https://blog.youkuaiyun.com/aaaliuwei/article/details/82116188

本文介绍了JSON与对象的相互转换方法，包括将JSON字符串转为JavaScript对象、Java对象转JSON、JS对象转JSON等，还给出了JSON.parse()和JSON.stringify()的使用示例，最后展示了SpringMVC从前台ajax传值取得JSON数据并解析的具体代码。

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1.jQuery.parseJSON()函数用于将格式完好的JSON字符串转为与之对应的JavaScript对象。

var micDeviceList = $.parseJSON($('#micDeviceListPar').val());

2.java对象转json

List<TalkDataListDto> talk = new ArrayList<TalkDataListDto>();

JSON.toJSON(talk).toString()

3.js对象转json

//　画面のデータ数组
   var arraydDate = [];
   for (var i=0;i<dateList.length;i++) {
       arraydDate.push(dateList[i]);
   }

JSON.stringify(arraydDate );

JSON.parse()用于从一个字符串中解析出json对象，如

var str ='{"name":"zyc","age":"23"}';

结果:

JSON.parse(str);

Object

age:'23'

name:'zyc'

JOSN.stringify()用于从一个对象解析出字符串，如

var a={a:'1',b:'2'};

结果:

JSON.stringify(a);

"{'a':'1','b':'2'}";

6.springMVC 从前台ajax传值取得json

（01）// 画面data
       String jsonStr = request.getParameter("dateList");
       List<TalkDataListDto> talkDataListDtoList = new ArrayList<TalkDataListDto>();
       TalkDataListDto talkDataListDto = null;

       JSONArray jsonArray = JSON.parseArray(jsonStr);
for(Object ob : jsonArray){
JSONObject jObject = (JSONObject) ob;
talkDataListDto = new TalkDataListDto();

talkDataListDto.setTalkIndex(jObject.getInteger("talkIndex"));
talkDataListDto.setStartTime(jObject.getString("startTime"));
talkDataListDto.setEndTime(jObject.getString("endTime"));
talkDataListDto.setMicDeviceID(jObject.getString("micDeviceID"));
talkDataListDto.setMicNo(jObject.getInteger("micNo"));
talkDataListDto.setVoiceAngle(jObject.getInteger("voiceAngle"));
talkDataListDto.setTalker(jObject.getString("talker"));
talkDataListDto.setVoiceText(jObject.getString("voiceText"));
talkDataListDto.setEditText(jObject.getString("editText"));
talkDataListDto.setValidFlag(jObject.getInteger("validFlag"));
talkDataListDto.setEditFlag(jObject.getInteger("editFlag"));
talkDataListDto.setPreTalkIndex(jObject.getInteger("preTalkIndex"));
talkDataListDto.setNextTalkIndex(jObject.getInteger("nextTalkIndex"));
talkDataListDto.setStartTimeP(jObject.getString("startTimeP"));
talkDataListDto.setEndTimeP(jObject.getString("endTimeP"));
talkDataListDto.setVoiceTextP(jObject.getString("voiceTextP"));
talkDataListDtoList.add(talkDataListDto);
}

（02）

var formData = new FormData();
   formData.append("dateList",JSON.stringify(micDeviceList));
   formData.append("conferenceId",conferenceId);
   $.ajax({
       type : "POST",
       url : path + "/textEdit/talkerAllEdit.action",
       data : formData,
       dataType : 'json',
      async : false,
cache : false,
contentType: false,
processData: false,
       success : function(data) {}

String jsonStr = request.getParameter("dateList");
List<MicDeviceListDto> micDeviceList = JSON.parseArray(jsonStr,MicDeviceListDto.class);