Json-lib---> Getting Started

jsonobject This object can be seen as a map

Two methods of construction:

Jsonobject Jo = new Jsonobject ();

jsonobject Jo = Jsonobject.fromobject ( requires a Map object or JavaBean object here ) ;

Convert to JSON string: string json = jo.tostring ();

Jsonarray This object can be seen as a list

Two methods of construction:

Jsonarray ja = jsonarray.fromobject ();

Jsonarray ja = jsonarray.fromobject ( A Collection collection object is required here);

Convert to JSON string: string json = ja.tostring ();

Case Analysis:

---> Entity class Person.java

Requirements: ① must be public modified ② has getter and setter methods

1  PackageJSON;2 3  Public classPerson {4     PrivateString name;5     Private intAge ;6     PrivateString sex;7     8      PublicString GetName () {9         returnname;Ten     } One      Public voidsetName (String name) { A          This. Name =name; -     } -      Public intGetage () { the         returnAge ; -     } -      Public voidSetage (intAge ) { -          This. Age =Age ; +     } -      PublicString Getsex () { +         returnsex; A     } at      Public voidsetsex (String sex) { -          This. Sex =sex; -     } -      PublicPerson () {} -      PublicPerson (String name,intAge , String Sex) { -         Super(); in          This. Name =name; -          This. Age =Age ; to          This. Sex =sex; +     } -  the}

---> Test class Testjson.java

1  PackageJSON;2 3 Importjava.util.ArrayList;4 ImportJava.util.HashMap;5 Importjava.util.List;6 ImportJava.util.Map;7 8 ImportNet.sf.json.JSONArray;9 ImportNet.sf.json.JSONObject;Ten  One Importorg.junit.Test; A  -  Public classTestjson { -  the @Test -      Public voidFun () { -Jsonobject Jo =NewJsonobject ();//Create a Map object -Jo.put ("name", "Zhang San"); +Jo.put ("Age", 23); -Jo.put ("Sex", "male"); +String JSON =jo.tostring (); A         //{"name": "Zhang San", "age": +, "sex": "Male"} at System.out.println (JSON);  -     } - @Test -      Public voidfun1 () { -person P1 =NewPerson ("John Doe", "male"); -person P2 =NewPerson ("Harry", "female"); inmap<string,person> map =NewHashmap<string,person>(); -Map.put ("1", p1); toMap.put ("2", p2); +          -Jsonobject Mapjson = jsonobject.fromobject (map);//Create Mapjson the          * //{"2": {"age": +, "name": "Harry", "Sex": "Female"}, "1": {"Age": $, "name": "John Doe", "Sex": "Male"}} $ System.out.println (mapjson.tostring ());Panax Notoginseng          -          thePerson person =NewPerson ("LiSi", "female"); +Jsonobject Beanjson = jsonobject.fromobject (person);//Create Beanjson A          the         //{"Age": +, "name": "LiSi", "Sex": "Female"} + System.out.println (beanjson.tostring ()); -          $     } $      - @Test -      Public voidfun2 () { theperson P1 =NewPerson ("John Doe", "male"); -person P2 =NewPerson ("Harry", "female");Wuyilist<person> list =NewArraylist<person>(); the List.add (p1); - List.add (p2); WuJsonarray ja = jsonarray.fromobject (list);//To create an object from the list -String JSON =ja.tostring (); About //[{"Age": "" Name ":" John Doe "," Sex ":" Male "},{" age ":" Name ":" Harry "," Sex ":" Female "}] $ System.out.println (JSON);  -          -Jsonarray jsonlist =NewJsonarray (); - Jsonlist.add (p1); A Jsonlist.add (p2); + //[{"Age": "" Name ":" John Doe "," Sex ":" Male "},{" age ":" Name ":" Harry "," Sex ":" Female "}] the System.out.println (jsonlist.tostring ()); -     } $  the}

Json-lib---> Getting Started