JSONObject

[html]
<PRE class=html name="code">JSONObject_1_3 
 package json; 
  
 import net.sf.json.JSON; 
 import net.sf.json.JSONObject; 
 import net.sf.json.xml.XMLSerializer; 
  
 public class JSONObject_1_3 { 
 public static void javaToJSON() { 
 System.out.println("java代码封装为json字符串"); 
 JSONObject jsonObj = new JSONObject(); 
 jsonObj.put("username", "张三"); 
 jsonObj.put("password", "123456"); 
 System.out.println("java--->json \n" + jsonObj.toString()); 
 } 
  
 public static void jsonToJAVA() { 
 System.out.println("json字符串转java代码"); 
 String jsonStr = "{\"password\":\"123456\",\"username\":\"张三\"}"; 
 JSONObject jsonObj = JSONObject.fromString(jsonStr); 
 String username = jsonObj.getString("username"); 
 String password = jsonObj.optString("password"); 
 System.out.println("json--->java\n username=" + username 
 + "\t password=" + password); 
 } 
  
 public static void jsonToXML() { 
 System.out.println("json字符串转xml字符串"); 
 String jsonStr = "{\"password\":\"123456\",\"username\":\"张三\"}"; 
 JSONObject json = JSONObject.fromString(jsonStr); 
 XMLSerializer xmlSerializer = new XMLSerializer(); 
 xmlSerializer.setRootName("user_info"); 
 xmlSerializer.setTypeHintsEnabled(false); 
 String xml = xmlSerializer.write(json); 
 System.out.println("json--->xml \n" + xml); 
 } 
  
 public static void javaBeanToJSON() { 
 System.out.println("javabean转json字符串"); 
 UserInfo userInfo = new UserInfo(); 
 userInfo.setUsername("张三"); 
 userInfo.setPassword("123456"); 
 JSONObject json = JSONObject.fromBean(userInfo); 
 System.out.println("javabean--->json \n" + json.toString()); 
 } 
  
 public static void javaBeanToXML() { 
 System.out.println("javabean转xml字符串"); 
 UserInfo userInfo = new UserInfo(); 
 userInfo.setUsername("张三"); 
 userInfo.setPassword("123456"); 
 JSONObject json = JSONObject.fromBean(userInfo); 
 XMLSerializer xmlSerializer = new XMLSerializer(); 
 String xml = xmlSerializer.write(json, "UTF-8"); 
 System.out.println("javabean--->xml \n" + xml); 
 } 
  
 public static void xmlToJSON(){ 
 System.out.println("xml字符串转json字符串"); 
 String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><user_info><password>123456</password><username>张三</username></user_info>"; 
 JSON json=XMLSerializer.read(xml); 
 System.out.println("xml--->json \n"+json.toString()); 
 } 
  
 public static void main(String args[]) { 
 // javaToJSON(); 
 // jsonToJAVA(); 
 // jsonToXML(); 
 // javaBeanToJSON(); 
 // javaBeanToXML(); 
 xmlToJSON(); 
 } 
 }</PRE><BR> 
json.jarjson_new.jar 
<PRE></PRE> 
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补充：web前端 , JavaScript ,