Conversion of json,string and object __js

Now the interface data for the mainstream platform is already in JSON format. A simple introduction to centralized conversion is the use of Third-party jar packages.

1. Jackson.

Official website: http://jackson.codehaus.org/The Jackson-all-1.9.1.jar http://pan.baidu.com/s/1gd87aGr usage I'm using

private static Objectmapper Objectmapper = new Objectmapper ();
    static{        Objectmapper.setdateformat (New SimpleDateFormat ("Yyyy-mm-dd"));         Objectmapper.setdeserializationconfig (Objectmapper.getdeserializationconfig (). Without (                                   Des
ErializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES));
   }    /**      * using objects for JSON deserialization.      * @param json JSON string      * @param pojoclass class type JSON string type to class      *  /    public static Object Decodejson (String json, Class Pojoclass) throws exception{             try{            return Objectmapper.readvalue (JSON, pojoclass); &nbsp ;      }catch (Exception e) {            Throw E
       }     {   /**      * serialization of objects. 
     * @param o entity object      * @return serialized JSON object to string, convert map and other types      */     public static String Encodejson (Object o) throws exception{        try{   
        return objectmapper.writevalueasstring (o);        }catch (Exception e) {            throw e;       & nbsp
 }    }

2. Fastjson

Alibaba Fastjson is also a Json toolkit, the fastest package, is said to test beyond other Java JSON parser, beyond the Jackjson, support Java beans, collections, maps, dates, enums, support generics support introspection ; able to run directly in the Java environment, support Android, and open source.

API entry classes are Com.alibaba.fastjson.JSON common operations

public static final Object parse (String text); Parse the JSON text to Jsonobject or Jsonarray public 
static final Jsonobject parseobject (String text); Parse the JSON text into Jsonobject public    
static final  T parseobject (String text, Class clazz);//parse JSON text as javabean< C3/>public static final Jsonarray Parsearray (String text); Parse the JSON text into Jsonarray public 
static final  List Parsearray (String text, Class clazz); Parse the JSON text into the JavaBean collection public 
static final String tojsonstring (object);//convert JavaBean to JSON text public 
Static final String tojsonstring (Object object, Boolean Prettyformat); Serializes the JavaBean to the formatted JSON text public 
static final object Tojson (object javaobject); Converts the JavaBean to Jsonobject or Jsonarray.

My jar package: http://pan.baidu.com/s/1dDxfK21 plus a request parsing, parsing is done directly into Java classes,

private string Getrequestbody (HttpServletRequest request) throws IOException {
string postbody = new string ();
BufferedReader Breader = Request.getreader ();
        String line = null;
        while (line = Breader.readline ())!= null) {
            postbody + = line;
        }
return postbody;
}
Pay Ucreq = Json.parseobject (Postbody, Pay.class);

3.Gson

Google's Gson package, my jar bag.

	    Jsonparser json = new Jsonparser ();
            Jsonobject obj = (jsonobject) json.parse (content);
            String orderId = Obj.get ("OrderId"). toString ();
            String money = obj.get (' money '). toString ();

4.json.

Two packages required Json-smart.jarjson-lib-2.4-jdk15.jar

Jsonparser jsonparser = new Jsonparser (jsonparser.default_permissive_mode);
   Jsonobject obj;
   try {
       obj = (jsonobject) jsonparser.parse (JSONSTR);
   } catch (ParseException e) {
       throw new qexception ( Qexception.code_json_error, jsonstr);
   catch (Exception E1) {
       throw new Qexception (Qexception.code_json_error, jsonstr);
   }

   String errorcode = (string) obj.get ("Error_code");