json的使用簡介

json 所依賴的jar包   均可在 jar114.com 下載到

1. commons-beanutils.jar
   
2. commons-collections-3.2.1.jar
   
3. commons-lang-2.5.jar
   
4. commons-logging-1.1.1.jar
   
5. ezmorph-1.0.6.jar
   
6. json-lib-2.2.3-jdk15.jar
   
   
   一般使用方法
   </span>

   
   

   JSONArray jsonArray = JSONArray.fromObject(getList());

   System.out.println(jsonArray);

   
   

    轉化數組和集合
       

   boolean[] boolArray = new boolean[]{true,false,true};
          JSONArray jsonArray = JSONArray.fromObject(boolArray);
          System.out.println(jsonArray);
      輸出：[true,false,true]
       List list = new ArrayList();
          list.add(“第一個”);
          list.add(“第二個”);
          JSONArray jsonArray = JSONArray.fromObject(list);
       System.out.println(jsonArray);
      輸出：[“第一個”, “第二個”]
         
          JSONArray jsonArray3 = JSONArray.fromObject("['json','is','easy']");
       System.out.println(jsonArray3);
      輸出：[“json”, “is”, “'easy'”]
     

   轉化對象

   轉化Map
   

   
   

   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);
   System.out.println(json);
   輸出：[“name”: “json”, “bool”:true, “int”,1, “arr”:[ “a”, “b”], “func”:function(i){return this.arr[i];}]
   
   

   轉化Bean
   
   

   MyBean.java
   public class MyBean {
       private String name = "json";
     private int pojoId = 1;
       private String func1 = "function(i){return this.options[i]}";
       private JSONFunction func2 = new JSONFunction(new String[]{"i"},"return this.options[i];");
      
       //以下為get、set方法
   }
   MyBean bean = new MyBean();
   JSONObject jsonObject = JSONObject.fromObject(bean);
   System.out.println(jsonObject);
   輸出：
   {"func1":function(i){return this.options[i]},"pojoId":1,"name":"json","func2":function(i){ return this.options[i]; }
   
   

   從JSON到Beans
   
   

   //轉化為動態bean
   String myjson = "{name=\"json\",bool:true,int:1,double:2.2,function:function(a){return a;},array:[1,2]}";
   JSONObject json1 = JSONObject.fromString(myjson);
   Object bean1 = JSONObject.toBean(json1);
   由JSON生成XML
   JSONObject json = new JSONObject(true);
   XMLSerializer xmlSerializer = new XMLSerializer();
   String xml = xmlSerializer.write(json);
   System.out.println("xml:" + xml);
   輸出：xml:<?xml version="1.0" encoding="UTF-8"?>
   <o null="true"/>
   JSONObject json2 = JSONObject.fromObject("{\"name\":\"json\",\"bool\":true,\"int\":1}");
   String xml2 = xmlSerializer.write(json2);
   System.out.println("xml2:" + xml2);
   輸出：xml2:<?xml version="1.0" encoding="UTF-8"?>
   <o><bool type="boolean">true</bool><int type="number">1</int><name type="string">json</name></o>
   JSONArray json3 = JSONArray.fromObject("[1,2,3]");
   String xml3 = xmlSerializer.write(json3);
   System.out.println("xml3:" + xml3);
   輸出：xml3:<?xml version="1.0" encoding="UTF-8"?>
   <a><e type="number">1</e><e type="number">2</e><e type="number">3</e></a>