Convert JSON format using Fastjson

1. Download the jar Package

http://repo1.maven.org/maven2/com/alibaba/fastjson/

2. Importing a jar package into a project 3. Example

 PackageNc.testfastjson;Importjava.util.ArrayList;ImportJava.util.HashMap;Importjava.util.LinkedList;Importjava.util.List;ImportJava.util.Map;ImportJava.util.Map.Entry;ImportJava.util.Set;ImportCom.alibaba.fastjson.JSON;ImportCom.alibaba.fastjson.JSONObject;Importcom.alibaba.fastjson.TypeReference; Public classTestfastjson { Public Static voidMain (string[] args) { //  Java object to JSON People p1 =NewPeople ("People_1", "Male", 1); String P1_json=json.tojsonstring (p1);                System.out.println (P1_json.tostring ());  //  JSON to Java object String P2_json = "{' name ': ' people_2 ', ' sex ': ' Male ', ' Age ': 2}"; People P2= Json.parseobject (P2_json, people.class);                System.out.println (P2.tostring ());  //  Java Object LinkedList Collection goto JSON Linkedlist<people> p_list =NewLinkedlist<>(); People P3=NewPeople ("People_3", "Male", 3); People P4=NewPeople ("People_4", "Male", 4); People P5=NewPeople ("People_5", "Male", 5);        P_list.add (p3);        P_list.add (p4);                P_list.add (p5); String P_list_json=json.tojsonstring (p_list);                System.out.println (P_list_json);  //  JSON to Java Object List collection list<people> p_list_2 = Json.parsearray (P_list_json, people.class);  for(People people:p_list_2) {System.out.println (people.tostring ()); }                 //  Java object ArrayList to JSON Arraylist<people> ArrayList =NewArraylist<>();        Arraylist.add (p3);        Arraylist.add (p4);                Arraylist.add (p5); String Arrays_json=json.tojsonstring (arrayList);                System.out.println (Arrays_json); // JSON to Java Object List collection list<people> arrayList2 = Json.parsearray (Arrays_json, people.class);  for(People people:arraylist2) {System.out.println (people.tostring ()); }                 //  map to JSON HashMap<string,people> map =NewHashmap<>(); Map.put ("P3", p3); Map.put ("P4", p4); Map.put ("P5", p5); String Map_json=json.tojsonstring (map);                System.out.println (Map_json);  //  JSON to map Map<string, string> map2 = Jsonobject.parseobject (map_json.tostring (),NewTypereference<map<string, string>>(){}); Set<entry<string, string>> entryset =Map2.entryset ();  for(Entry<string, string>Entry:entryset) {String key=Entry.getkey (); String value=Entry.getvalue (); People p= Json.parseobject (value, people.class); SYSTEM.OUT.PRINTLN (Key+":"+p.tostring ()); }            }}

 PackageNc.testfastjson; Public classpeople {PrivateString name; PrivateString sex; Private intAge ;  PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; }     PublicString Getsex () {returnsex; }     Public voidsetsex (String sex) { This. Sex =sex; }     Public intGetage () {returnAge ; }     Public voidSetage (intAge ) {         This. Age =Age ; } @Override PublicString toString () {return"People [name=" + name + ", sex=" + Sex + ", age=" + Age + "]"; }         Publicpeople () {Super(); }     PublicPeople (string name, String sex,intAge ) {        Super();  This. Name =name;  This. Sex =sex;  This. Age =Age ; }    }

Convert JSON format using Fastjson