package com.test; import net.sf.json.JSONArray; import net.sf.json.JSONObject; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; public class FileDemo05{ // json字符串转 private static String diskListContent = "[{\"n1\":\"asd\",\"n2\":22,\"n3\":\"45.40GB\"," + "\"n4\":\"qwerty\",\"n5\":\"asd\",}," + "{\"n1\":\"local\"," + "\"n2\":1,\"n3\":\"279.40GB\",\"n4\":\"ST3300656SS\",\"n5\":\"\\/devm\\/d0\"}]"; /*** * json字符串转java List * * @param rsContent * @return * @throws Exception */ 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; } /** * @param args * @throws Exception */ public static void main(String[] args) throws Exception { List<Map<String, String>> list1 = jsonStringToList(diskListContent); System.out.println("json字符串成map"); for (Map<String, String> m : list1) { System.out.println(m); } System.out.println("map转换成json字符串"); for (Map<String, String> m : list1) { JSONArray jsonArray = JSONArray.fromObject(m); System.out.println(jsonArray.toString()); } System.out.println("list转换成json字符串"); JSONArray jsonArray2 = JSONArray.fromObject(list1); System.out.println(jsonArray2.toString()); } }
输出结果:
json字符串内容如下
[{"n1":"asd","n2":22,"n3":"45.40GB","n4":"qwerty","n5":"asd"},{"n1":"local","n2":1,"n3":"279.40GB","n4":"ST3300656SS","n5":"/devm/d0"}]
json字符串成map
{n1=asd, n5=asd, n4=qwerty, n3=45.40GB, n2=22}
{n1=local, n5=/devm/d0, n4=ST3300656SS, n3=279.40GB, n2=1}
map转换成json字符串
[{"n1":"asd","n5":"asd","n4":"qwerty","n3":"45.40GB","n2":"22"}]
[{"n1":"local","n5":"/devm/d0","n4":"ST3300656SS","n3":"279.40GB","n2":"1"}]
list转换成json字符串
[{"n1":"asd","n5":"asd","n4":"qwerty","n3":"45.40GB","n2":"22"},{"n1":"local","n5":"/devm/d0","n4":"ST3300656SS","n3":"279.40GB","n2":"1"}]