List list = new ArrayList();
list.add( "first" );
list.add( "second" );
JSONArray jsonArray2 = JSONArray.fromObject( list );

Map map = new HashMap();
map.put("name", "json");
map.put("bool", Boolean.TRUE);
map.put("int", new Integer(1));
map.put("arr", new String[] { "a", "b" });
map.put("func", "function(i){ return this.arr[i]; }");
JSONObject json = JSONObject.fromObject(map);

JSONObject jsonObject = JSONObject.fromObject(new JsonBean());

boolean[] boolArray = new boolean[] { true, false, true };
JSONArray jsonArray1 = JSONArray.fromObject(boolArray);

JSONArray jsonArray3 = JSONArray.fromObject("['json','is','easy']" );

List list = new ArrayList();
JsonBean2 jb1 = new JsonBean2();
jb1.setCol(1);
jb1.setRow(1);
jb1.setValue("xx");JsonBean2 jb2 = new JsonBean2();
jb2.setCol(2);
jb2.setRow(2);
jb2.setValue("");list.add(jb1);
list.add(jb2);
JSONArray ja = JSONArray.fromObject(list);

package com.json;import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;import net.sf.json.JSONArray;
import net.sf.json.JSONObject;/*** 使用json-lib构造和解析Json数据* * @author Alexia* @date 2013/5/23**/
public class JsonTest {/*** 构造Json数据* * @return*/public static String BuildJson() {// JSON格式数据解析对象JSONObject jo = new JSONObject();// 下面构造两个map、一个list和一个Employee对象Map<String, String> map1 = new HashMap<String, String>();map1.put("name", "Alexia");map1.put("sex", "female");map1.put("age", "23");Map<String, String> map2 = new HashMap<String, String>();map2.put("name", "Edward");map2.put("sex", "male");map2.put("age", "24");List<Map> list = new ArrayList<Map>();list.add(map1);list.add(map2);Employee employee = new Employee();employee.setName("wjl");employee.setSex("female");employee.setAge(24);// 将Map转换为JSONArray数据JSONArray ja1 = JSONArray.fromObject(map1);// 将List转换为JSONArray数据JSONArray ja2 = JSONArray.fromObject(list);// 将Bean转换为JSONArray数据JSONArray ja3 = JSONArray.fromObject(employee);System.out.println("JSONArray对象数据格式：");System.out.println(ja1.toString());System.out.println(ja2.toString());System.out.println(ja3.toString());// 构造Json数据，包括一个map和一个Employee对象jo.put("map", ja1);jo.put("employee", ja2);System.out.println("\n最终构造的JSON数据格式：");System.out.println(jo.toString());return jo.toString();}/*** 解析Json数据* * @param jsonString Json数据字符串*/public static void ParseJson(String jsonString) {// 以employee为例解析，map类似JSONObject jb = JSONObject.fromObject(jsonString);JSONArray ja = jb.getJSONArray("employee");List<Employee> empList = new ArrayList<Employee>();// 循环添加Employee对象（可能有多个）for (int i = 0; i < ja.size(); i++) {Employee employee = new Employee();employee.setName(ja.getJSONObject(i).getString("name"));employee.setSex(ja.getJSONObject(i).getString("sex"));employee.setAge(ja.getJSONObject(i).getInt("age"));empList.add(employee);}System.out.println("\n将Json数据转换为Employee对象：");for (int i = 0; i < empList.size(); i++) {Employee emp = empList.get(i);System.out.println("name: " + emp.getName() + " sex: "+ emp.getSex() + " age: " + emp.getAge());}}/*** @param args*/public static void main(String[] args) {// TODO Auto-generated method stub
ParseJson(BuildJson());}}