Examples of how JSON is used

Example 1:

1 ImportNet.sf.json.JSONArray;2 ImportNet.sf.json.JSONObject;3 4 /**5 * Created by Leiqiang on 2014/7/25.6  */7  Public classJsonobjectsample {8     //Create a Jsonobject object9     Private Staticjsonobject Createjsonobject () {TenJsonobject Jsonobject =NewJsonobject (); OneJsonobject.put ("username", "Leiqiang"); AJsonobject.put ("Sex", "male"); -Jsonobject.put ("nickname", "Lqproplus"); -         returnJsonobject; the     } -  -      Public Static voidMain (string[] args) { -Jsonobject jsonobject = Jsonobjectsample.createjsonobject ();//static method, directly through the class name + method call +         //Output Jsonobject Object -System.out.println ("Jsonobject:" +jsonobject); +  A         //interpreting the type of the output object at         BooleanIsArray =Jsonobject.isarray (); -         BooleanIsEmpty =jsonobject.isempty (); -         BooleanIsnullobject =Jsonobject.isnullobject (); -System.out.println ("is an array:" + IsArray + ", is empty:" +IsEmpty -+ ", Isnullobject:" +isnullobject); -  in         //adds an attribute, appending an element after jsonobject.  -Jsonobject.element ("Address", "Beijing"); toSystem.out.println ("Object after adding a property:" +jsonobject); +  -         //returns a Jsonarray object theJsonarray Jsonarray =NewJsonarray (); *Jsonarray.add (0, "This is a Jsonarray value"); $Jsonarray.add (1, "another Jsonarray value");Panax NotoginsengJsonobject.element ("Jsonarray", Jsonarray); -         //Add a jsonarray behind the Jsonobject . theJsonarray array = Jsonobject.getjsonarray ("Jsonarray"); +         //System.out.println ("Object after joining Jsonarray:" +jsonobject); A  the  +System.out.println ("Returns a Jsonarray object:" +array); -         //value after adding Jsonarray $SYSTEM.OUT.PRINTLN ("result =" +jsonobject); $  -         //returns a string based on key -String username = jsonobject.getstring ("username"); theSystem.out.println ("username=" +username); - Wuyi         //convert characters to Jsonobject theString temp =jsonobject.tostring (); -Jsonobject Object =Jsonobject.fromobject (temp); Wu  -         //return value after conversion based on key AboutSystem.out.println ("nickname=" + object.get ("nickname"))); $  -     } -}

Operation Result:

1jsonobject:{"username": "Leiqiang", "Sex": "Male", "nickname": "Lqproplus"}2is an array:false, whether it is empty:false, Isnullobject:false3Object after adding the attribute: {"username": "Leiqiang", "Sex": "Male", "nickname": "Lqproplus", "Address": "Beijing"}4Returns a Jsonarray object: ["This is a Jsonarray value", "another Jsonarray value")]5Results ={"username": "Leiqiang", "Sex": "Male", "nickname": "Lqproplus", "Address": "Beijing", "Jsonarray": ["This is a Jsonarray value "," another Jsonarray value "]}6Username==>Leiqiang7Nickname=lqproplus

Example 2:

1 ImportNet.sf.json.JSONArray;2 ImportNet.sf.json.JSONObject;3 4 /**5 * Created by Leiqiang on 2014/7/25.6  */7  Public classJsontest {8      Public Static voidMain (String args[]) {9Jsonobject jsonObj0 =NewJsonobject ();TenJsonobject jsonObj1 =NewJsonobject (); OneJsonobject JsonObj2 =NewJsonobject (); AJsonobject jsonObj3 =NewJsonobject (); -Jsonarray Jsonarray =NewJsonarray (); -  the         //Create JsonObj0 -Jsonobj0.put ("NAME0", "Zhangsan"); -Jsonobj0.put ("Sex1", "female"); -System.out.println ("JsonObj0:" +jsonObj0); +  -         //Create JsonObj1 +Jsonobj1.put ("name", "Lisi"); AJsonobj1.put ("Sex", "male"); atSystem.out.println ("Jsonobj:" +jsonObj1); -  -         //Create a jsonObj2 with two entries with entries of Jsonobj0,jsonobj1 -Jsonobj2.put ("Item0", jsonObj0); -Jsonobj2.put ("Item1", jsonObj1); -System.out.println ("JsonObj2:" +jsonObj2); in  -         //Create jsonObj3 with only one entry with content JsonObj2 toJsonobj3.element ("J3", jsonObj2); +System.out.println ("JsonObj3:" +jsonObj3); -  the         //Add the Jsonobject object to the Jsonarray. The difference between Jsonarray and Jsonobject is that Jsonarray is more than jsonobject square brackets [] * Jsonarray.add (jsonObj1); $System.out.println ("Jsonarray:" +Jsonarray);Panax Notoginseng  -Jsonobject JsonObj4 =NewJsonobject (); theJsonobj4.element ("Weather", Jsonarray); +System.out.println ("JsonObj4:" +jsonObj4); A     } the}

Operation Result:

1 jsonobj0:{"NAME0": "Zhangsan", "sex1": "Female"}2 jsonobj:{"name": "Lisi", "Sex": "Male" }3 jsonobj2:{"item0": {"NAME0": "Zhangsan", "sex1": "Female"}, "Item1": {"name": "Lisi", "Sex": "Male" }}4 jsonobj3:{"J3": {"item0": {"NAME0": "Zhangsan", "sex1": "Female"}, "Item1": {"name": "Lisi", "sex" : "Male"}}}5 jsonarray:[{"name": "Lisi", "Sex": "Male"}]6 jsonobj4:{"Weather": [{"Name": "Lisi", "Sex": "Male"}]}

Example 3:

1 ImportNet.sf.json.JSONObject;2 3 /**4 * Created by Leiqiang on 2014/7/25.5  */6  Public classJsonfromobject {7      Public Static voidMain (string[] args) {8 9Jsonobject object = Jsonobject.fromobject ("{\" username\ ": \" leiqiang\ ", \" sex\ ": \" male \ ", \" nickname\ ": \" Lqproplus\ "}");TenSystem.out.println ("nickname=" + object.get ("nickname"))); One  ASystem.out.println (object.getstring ("username")); -  -Jsonobject Object1 =NewJsonobject (); theObject1.put ("a", object); - System.out.println (object1); -     } -  +}

Operation Result:

1 nickname=lqproplus2leiqiang3 {"A": {"username": "Leiqiang", " Sex ":" Male "," nickname ":" Lqproplus "}}