JSON是一種很簡潔很重要的資料格式，通常用來交換傳輸資料，廣泛使用于JavaScript技術中，并逐漸在各種流行程式設計語言中火了起來。
在Java中也有一個JSON的庫，用來重要作用就是Java對象與JSON、XML資料的互相轉換，有着重要的應用。
本開源項目的文檔非常好，一下是我看快速起步文檔所寫，原快速上手文檔有一些錯誤和問題，這裡都處理過了。
環境：
JDK5
json-lib-2.3-jdk15
測試所依賴的包：
json-lib-2.3-jdk15.jar
commons-collections.jar
commons-lang.jar
commons-logging.jar
commons-beanutils.jar
ezmorph-1.0.6.jar
xom-1.1.jar
測試代碼：
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.xml.XMLSerializer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* JSON for Java測試代碼
*
* @author leizhimin 2009-12-28 13:15:25
*/
public class TestJSON {
public static void main(String[] args) {
test1();
test2();
test3();
test4();
test5();
}
/**
* 數組或集合-->JSON串
*/
public static void test1() {
System.out.println("------------數組或集合-->JSON串----------");
boolean[] boolArray = new boolean[]{true, false, true};
JSONArray jsonArray1 = JSONArray.fromObject(boolArray);
System.out.println(jsonArray1);
//[true,false,true]
List list = new ArrayList();
list.add("first");
list.add("second");
JSONArray jsonArray2 = JSONArray.fromObject(list);
System.out.println(jsonArray2);
//["first","second"]
JSONArray jsonArray3 = JSONArray.fromObject("['json','is','easy']");
System.out.println(jsonArray3);
// ["json","is","easy"]
* Object|Map-->JSON串
public static void test2() {
System.out.println("------------Object|Map-->JSON串----------");
Map map = new HashMap();
map.put("name", "json");
map.put("bool", Boolean.TRUE);
map.put("int", new Integer(1));
map.put("arr", new String[]{"a", "b"});
map.put("func", "function(i){ return this.arr[i]; }");
JSONObject jsonObject1 = JSONObject.fromObject(map);
System.out.println(jsonObject1);
//{"func":function(i){ return this.arr[i]; },"arr":["a","b"],"int":1,"bool":true,"name":"json"}
JSONObject jsonObject2 = JSONObject.fromObject(new MyBean());
System.out.println(jsonObject2);
//{"func1":function(i){ return this.options[i]; },"func2":function(i){ return this.options[i]; },"name":"json","options":["a","f"],"pojoId":1}
* JSON串-->Object
public static void test3() {
System.out.println("------------JSON串-->Object----------");
String json1 = "{name=\"json\",bool:true,int:1,double:2.2,func:function(a){ return a; },array:[1,2]}";
JSONObject jsonObject1 = JSONObject.fromObject(json1);
Object bean1 = JSONObject.toBean(jsonObject1);
System.out.println(bean1);
//net.sf.ezmorph.bean.MorphDynaBean@10dd1f7[
// {double=2.2, func=function(a){ return a; }, int=1, name=json, bool=true, array=[1, 2]}
//]
String json2 = "{bool:true,integer:1,string:\"json\"}";
JSONObject jsonObject2 = JSONObject.fromObject(json2);
BeanA bean2 = (BeanA) JSONObject.toBean(jsonObject2, BeanA.class);
System.out.println(bean2);
// BeanA{bool=true, integer=1, string='json'}
* JSON串-->XML
public static void test4() {
System.out.println("------------JSON串-->XML----------");
JSONObject json = new JSONObject(true);
String xml = new XMLSerializer().write(json);
System.out.println(xml);
JSONObject json1 = JSONObject.fromObject("{\"name\":\"json\",\"bool\":true,\"int\":1}");
String xml1 = new XMLSerializer().write(json1);
System.out.println(xml1);
JSONArray json2 = JSONArray.fromObject("[1,2,3]");
String xml2 = new XMLSerializer().write(json2);
System.out.println(xml2);
* XML-->JSON串
public static void test5() {
System.out.println("------------XML-->JSON串----------");
String xml = "" +
"<a class=\"array\">\n" +
" <e type=\"function\" params=\"i,j\">\n" +
" return matrix[i][j];\n" +
" </e>\n" +
"</a>";
JSONArray json = (JSONArray) new XMLSerializer().read(xml);
System.out.println(json);
}
import net.sf.json.JSONFunction;
* 測試Bean
* @author leizhimin 2009-12-28 13:55:09
public class MyBean {
private String name = "json";
private int pojoId = 1;
private char[] options = new char[]{'a', 'f'};
private String func1 = "function(i){ return this.options[i]; }";
private JSONFunction func2 = new JSONFunction(new String[]{"i"}, "return this.options[i];");
public String getName() {
return name;
public void setName(String name) {
this.name = name;
public int getPojoId() {
return pojoId;
public void setPojoId(int pojoId) {
this.pojoId = pojoId;
public char[] getOptions() {
return options;
public void setOptions(char[] options) {
this.options = options;
public String getFunc1() {
return func1;
public void setFunc1(String func1) {
this.func1 = func1;
public JSONFunction getFunc2() {
return func2;
public void setFunc2(JSONFunction func2) {
this.func2 = func2;
* @author leizhimin 2009-12-28 14:18:18
public class BeanA {
// String json2 = "{bool:true,integer:1,string:\"json\"}";
private boolean bool;
private Integer integer;
private String string;
public boolean isBool() {
return bool;
public void setBool(boolean bool) {
this.bool = bool;
public Integer getInteger() {
return integer;
public void setInteger(Integer integer) {
this.integer = integer;
public String getString() {
return string;
public void setString(String string) {
this.string = string;
@Override
public String toString() {
return "BeanA{" +
"bool=" + bool +
", integer=" + integer +
", string='" + string + '\'' +
'}';
運作結果：
------------數組或集合-->JSON串----------
[true,false,true]
["first","second"]
["json","is","easy"]
------------Object|Map-->JSON串----------
{"func":function(i){ return this.arr[i]; },"arr":["a","b"],"int":1,"bool":true,"name":"json"}
{"func1":function(i){ return this.options[i]; },"func2":function(i){ return this.options[i]; },"name":"json","options":["a","f"],"pojoId":1}
------------JSON串-->Object----------
net.sf.ezmorph.bean.MorphDynaBean@bd0108[
{double=2.2, func=function(a){ return a; }, int=1, name=json, bool=true, array=[1, 2]}
]
BeanA{bool=true, integer=1, string='json'}
------------JSON串-->XML----------
<?xml version="1.0" encoding="UTF-8"?>
<o null="true"/>
<o><bool type="boolean">true</bool><int type="number">1</int><name type="string">json</name></o>
<a><e type="number">1</e><e type="number">2</e><e type="number">3</e></a>
------------XML-->JSON串----------
2009-12-28 15:20:39 net.sf.json.xml.XMLSerializer getType
資訊: Using default type string
[function(i,j){ return matrix[i][j]; }]
Process finished with exit code 0
特别注意：
1、所有的Bean都應該定義為public，否則會出現
net.sf.json.JSONException: java.lang.NoSuchMethodException: Property '***' has no getter method
的錯誤。
2、必須引入xom-1.1.jar包，否則抛出
java.lang.NoClassDefFoundError: nu/xom/Serializer
的異常。
本文轉自 leizhimin 51CTO部落格，原文連結：http://blog.51cto.com/lavasoft/251179，如需轉載請自行聯系原作者
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