Talking about the common use method of Fastjson _java

Source: Internet
Author: User
Tags array length generator


looks like this:

Package Demo;
Import java.util.ArrayList;
Import java.util.Collection;
Import Java.util.Date;
Import Java.util.HashMap;
Import java.util.List;

Import Java.util.Vector;

Import; Import entity.

Userinfo; /** * Fastjson is a very good Java language implementation of the JSON parser and generator, from the Alibaba engineer Development. Main Features: * 1 quick fast (faster than any other java-based parser and generator, including Jackson) strong (support for common JDK classes including any Java Bean * 2.Class, Collection, Map, date, or enum) 0 Dependencies (no other class library except JDK) */public class Testfastjson {public static void main (string[] args) {String json = ' {\
    "name\": \ "chenggang\", \ "age\": 24} ";
String Arrayayy = "[[\ Ma Yun ', 50],null,[\ ' ma Teng ', 30]]";
Entity2json ("Zhangsan", 24);
    List2json ();
Complexdata ();
Deserialization (JSON);
Dateformate (New Date ());
Json2eetity (JSON);
  String2jsonarray (ARRAYAYY); }//entity to JSON public static void Entity2json(String name, int age)
    {Userinfo info = new Userinfo (name, age); String Str_json = json.tojsonstring (info);
  System.out.println ("Convert entity to JSON" + Str_json);
    }//List turn JSON public static void List2json () {list<userinfo> list = new arraylist<userinfo> ();
    Userinfo userinfo1 = new Userinfo ("Lisi", 15);
    Userinfo Userinfo2 = new Userinfo ("Wangwu", 16);
    List.add (USERINFO1);
    List.add (Userinfo2);
    String json = json.tojsonstring (list, true);
  System.out.println ("The list set to the JSON format string:" + JSON); }//character array into JSON private static void String2jsonarray (String arrayayy) {Jsonarray array = Jsonarray.parsearray (a
    System.out.println ("array:" + array);
    SYSTEM.OUT.PRINTLN ("Array length:" + array.size ());
    Collection Nucon = new Vector ();
    Nucon.add (NULL);
    Array.removeall (Nucon);
    System.out.println ("array:" + array);
  SYSTEM.OUT.PRINTLN ("Array length:" + array.size ()); }//Complex data type public static void Complexdata () {Hashmap<string, object> map = new hashmap<string, object> ();
    Map.put ("username", "Zhangsan");
    Map.put ("Age", 24);

    Map.put ("Sex", "male");
    Map set hashmap<string, object> temp = new hashmap<string, object> ();
    Temp.put ("name", "Xiaohong");
    Temp.put ("Age", "23");

    Map.put ("Girlinfo", temp);
    List set list<string> list = new arraylist<string> ();
    List.add ("mountain climbing");
    List.add ("cycling");
    List.add ("tourism");
    Map.put ("hobby", list);
    String jsonstring = json.tojsonstring (map);
  SYSTEM.OUT.PRINTLN ("Complex data type:" + jsonstring);
    public static void deserialization (String json) {Userinfo Userinfo = Json.parseobject (JSON, userinfo.class);
  System.out.println ("name is:" + userinfo.getname () + ", Age is:" + userinfo.getage ());
    }//Format session date public static void Dateformate (date date) {System.out.println ("Output millisecond value:" + json.tojsonstring (date)); SYSTEM.OUT.PRINTLN ("Default format is:" + json.tojsonstring (date, Serializerfeature.writedateusedateformat)); SYSTEM.OUT.PRINTLN ("Custom Date:" + Json.tojsonstringwithdateformat (date, "Yyyy-mm-dd", SERIALIZERFEATURE.WR
  Itedateusedateformat)); }//JSON is converted to entity private static void Json2eetity (String json) {Userinfo Userinfo = Json.parseobject (JSON, Userinfo.
    System.out.println ("The address of the output object:" + userinfo.tostring ());
  System.out.println ("The name of the output object:" + userinfo.getname ()); }

The entity classes used in the demo above are:

Package entity;

public class Userinfo {
  private static final long serialversionuid = 1L;
  private String name;
  private int age;

  Public Userinfo () {
    super ();

  Public Userinfo (String name, int age) {
    super (); = name;
    This.age = age;

  public void SetName (String name) { = name;

  Public String GetName () {return

  public void Setage (int age) {
    this.age = age;

  public int getage () {return age

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