java解析json与map,list相互之间的转换
运行这个类需要加载jar包:ezmorph-1.0.6.jar、json-lib-2.4-jdk15.jar、jsoup-1.6.1.jar、commons-beanutils-1.8.0.jar、commons-collectio.jar、commons-lang-2.4.jar、commons-logging-1.1.1.jar。
点击下载所需夹包 http://download.csdn.net/detail/weizunde/7233825
package com.jjinfo.action; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.Reader; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletResponse; import net.sf.json.JSONArray; import net.sf.json.JSONObject; import org.apache.struts2.ServletActionContext; public class TestAction { public void sendMessage(String content) throws IOException { HttpServletResponse response = ServletActionContext.getResponse(); response.setCharacterEncoding("UTF-8"); //response.setCharacterEncoding("GBK"); response.getWriter().write(content); } private static List<Map<String, String>> jsonStringToList(String rsContent) throws Exception { JSONArray arry = JSONArray.fromObject(rsContent); System.out.println("json字符串内容如下"); System.out.println(arry); List<Map<String, String>> rsList = new ArrayList<Map<String, String>>(); for (int i = 0; i < arry.size(); i++) { JSONObject jsonObject = arry.getJSONObject(i); Map<String, String> map = new HashMap<String, String>(); for (Iterator<?> iter = jsonObject.keys(); iter.hasNext();) { String key = (String) iter.next(); String value = jsonObject.get(key).toString(); map.put(key, value); } rsList.add(map); } return rsList; } public String query() throws Exception{ String str=""; //获取xml,读入xml文件 SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); System.out.println("----start----"+sdf.format(new Date())); URL url; url = new URL("http://star.sgst.cn/starInfoForZSCQ.do?systemName=ZSCQ&pageNum=6"); URLConnection uc = url.openConnection(); InputStream in = uc.getInputStream(); Reader rd = new InputStreamReader(in,"UTF-8"); byte[] ch=new byte[1024]; StringBuilder sb=new StringBuilder(); int c=0; StringBuffer temp=new StringBuffer(); while ((c = rd.read()) != -1) { temp.append((char) c); } in.close(); str=temp.toString(); System.out.println(temp.toString()); System.out.println("----zhong----"+sdf.format(new Date())); List<Map<String, String>> list1 = jsonStringToList(str); System.out.println("json字符串成map"); for (Map<String, String> m : list1) { System.out.println(m); } return null; } }