java 取json_java获取json格式中的值详解

import org.json.JSONArray;

import org.json.JSONException;

public class test2 {

public static void main(String[] args) throws JSONException {

String str = "[{'columnId':5,'columnName':'人文历史'},{'columnId':2,'columnName':'商业视野'}]}";

JSONArray jsonArray = null;

jsonArray = new JSONArray(str);

System.out.println(jsonArray.getJSONObject(0).get("columnName"));

}

}

/**

* 项目变更详情

* @param request

* @param response

* @throws Exception

*/

@RequestMapping("detail")

@Action(description="编辑项目变更表")

public ModelAndView detail(HttpServletRequest request) throws Exception{

Long recordId=RequestUtil.getLong(request,"recordId",0L);

FundRecords fundRecord = fundRecordsService.getById(recordId);

FundModify fundModify = fundModifyService.getByRecordId(recordId);

String fileName = fundModify.getModifyFile();//failName = [{"id":"10000058240001","name":"附件.xls"}]

net.sf.json.JSONArray jsonArray = net.sf.json.JSONArray.fromObject(fileName);

String fileNames = "";

for (int i = 0; i < jsonArray.size(); i++) {

fileNames += jsonArray.getJSONObject(i).get("name")+",";

}

fileNames = fileNames.substring(0, fileNames.lastIndexOf(","));

return getAutoView().addObject("recordId", recordId).addObject("fundRecords", fundRecord)

.addObject("fundModify", fundModify).addObject("fileNames", fileNames);

}