The use of Jsonobject and Jsonarray

The use of Jsonobject and Jsonarray

First, the jar package simple Introduction

To enable the program to execute must introduce the Json-lib package, the Json-lib package is dependent on the following jar package at the same time:

1.commons-lang.jar

2.commons-beanutils.jar

3.commons-collections.jar

4.commons-logging.jar

5.ezmorph.jar

6.json-lib-2.2.2-jdk15.jar

Second, Jsonobject Object Use

The Json-lib package is a Beans,collections,maps,java arrays and XML and JSON transforms each other's packages. In this example, we will use the Jsonobject class to create the Jsonobject object, and then we print the values of those objects. In order to use the Jsonobject object, we will introduce the "Net.sf.json" package. To add an element to an object, we use the put () method.

Package Com.hwy;

Import Net.sf.json.JSONArray;
Import Net.sf.json.JSONObject;

public class Jsonobjectsample {

Create a Jsonobject object
private static Jsonobject Createjsonobject () {
Jsonobject jsonobject = new Jsonobject ();
Jsonobject.put ("username", "Huangwuyi");
Jsonobject.put ("Sex", "male");
Jsonobject.put ("QQ", "999999999");
Jsonobject.put ("Min.score", New Integer (99));
Jsonobject.put ("nickname", "Mood in the Dream");
return jsonobject;
}
public static void Main (string[] args) {
Jsonobject jsonobject = Jsonobjectsample.createjsonobject ();
Output Jsonobject Object
System.out.println ("jsonobject==>" +jsonobject);

Interpreting the type of the output object
Boolean IsArray = Jsonobject.isarray ();
Boolean isEmpty = Jsonobject.isempty ();
Boolean isnullobject = Jsonobject.isnullobject ();
System.out.println ("IsArray:" +isarray+ "IsEmpty:" +isempty+ "Isnullobject:" +isnullobject ");

Join? properties
Jsonobject.element ("Address", "Xiamen, Fujian Province");
System.out.println ("==>" object after adding the attribute); +jsonobject

Returns a Jsonarray object
Jsonarray Jsonarray = new Jsonarray ();
Jsonarray.add (0, "This is a Jsonarray value");
Jsonarray.add (1, "another Jsonarray value");
Jsonobject.element ("Jsonarray", Jsonarray);
Jsonarray array = Jsonobject.getjsonarray ("Jsonarray");
System.out.println ("Returns a Jsonarray object:" +array);
Join? The value after Jsonarray
{"username": "Huangwuyi", "Sex": "Male", "QQ": "999999999"," Min.score ":" nickname ":" The Mood in the dream "," Address ":" Xiamen, Fujian Province "," Jsonarray ": [" This is a Jsonarray value "," another Jsonarray Value "]}
SYSTEM.OUT.PRINTLN ("result =" +jsonobject);

Returns a string based on key
String username = jsonobject.getstring ("username");
System.out.println ("username==>" +username);

Convert characters to Jsonobject
String temp=jsonobject.tostring ();
Jsonobject object = jsonobject.fromobject (temp);
Return value by key after conversion
System.out.println ("qq=" +object.get ("QQ"));

}

}

jsonobject Online API: http://json-lib.sourceforge.net/apidocs/jdk15/index.html

The use of Jsonobject and Jsonarray