JSONObject

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();
 }
 }

json.jarjson_new.jar