JSON-lib框架，转换JSON、XML不再困难

Json-lib可以将Java对象转成json格式的字符串，也可以将Java对象转换成xml格式的文档，同样可以将json字符串转换成Java对象或是将xml字符串转换成Java对象。   一、 准备工作    1、 首先要去官方下载json-lib工具包   下载地址：   http://sourceforge.net/projects/json-lib/files/json-lib/json-lib-2.4/   目前最新的是2.4的版本，本示例中使用的是v2.3；json-lib还需要以下依赖包：   jakarta commons-lang 2.5   jakarta commons-beanutils 1.8.0   jakarta commons-collections 3.2.1   jakarta commons-logging 1.1.1   ezmorph 1.0.6   官方网址： http://json-lib.sourceforge.net/   然后在工程中添加如下jar包：   当然你也可以用2.4的json-lib库   你可以在这里看看官方提供的示例：   http://json-lib.sourceforge.net/usage.html   由于本次介绍的示例需要junit工具，所以你还需要添加junit的jar文件，版本是4.8.2版本的，下载地址： https://github.com/KentBeck/junit/downloads   如果你还不了解JSON是什么？那么你应该可以看看 http://www.json.org/json-zh.html   2、 要转换的JavaBean的代码如下：   package com.hoo.entity; public class Student {     private int id;     private String name;     private String email;     private String address;     private Birthday birthday;     //setter、getter     public String toString() {         return this.name + "#" + this.id + "#" + this.address + "#" + this.birthday + "#" + this.email;     } } Birthday. java   package com.hoo.entity; public class Birthday {     private String birthday;     public Birthday(String birthday) {         super();         this.birthday = birthday;     }     //setter、getter     public Birthday() {}     @Override     public String toString() {         return this.birthday;     } } 注意，上面的getter、setter方法省略了，自己构建下。   3、 新建JsonlibTest测试类，基本代码如下：   package com.hoo.test; import java.lang.reflect.InvocationTargetException; import java.util.ArrayList; import java.util.Collection; import java.util.Date; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Set; import net.sf.json.JSON; import net.sf.json.JSONArray; import net.sf.json.JSONFunction; import net.sf.json.JSONObject; import net.sf.json.JSONSerializer; import net.sf.json.JsonConfig; import net.sf.json.processors.JsonValueProcessor; import net.sf.json.util.PropertyFilter; import net.sf.json.xml.XMLSerializer; import org.apache.commons.beanutils.PropertyUtils; import org.junit.After; import org.junit.Before; import org.junit.Test; import com.hoo.entity.Birthday; import com.hoo.entity.Student; /**  * <b>function:</b> 用json-lib转换java对象到JSON字符串  * 读取json字符串到java对象，序列化jsonObject到xml  * json-lib-version: json-lib-2.3-jdk15.jar  * 依赖包:    * commons-beanutils.jar  * commons-collections-3.2.jar  * ezmorph-1.0.3.jar  * commons-lang.jar  * commons-logging.jar  * @author hoojo  * @createDate Nov 28, 2010 2:28:39 PM  * @file JsonlibTest.java  * @package com.hoo.test  * @project WebHttpUtils  * @blog   http://blog.csdn.net/IBM_hoojo  * @email   [email protected]  * @version 1.0  */ @SuppressWarnings({ "deprecation", "unchecked" }) public class JsonlibTest {     private JSONArray jsonArray = null;     private JSONObject jsonObject = null;     private Student bean = null;     @Before     public void init() {         jsonArray = new JSONArray();           jsonObject = new JSONObject();           bean = new Student();         bean.setAddress("address");         bean.setEmail("email");         bean.setId(1);         bean.setName("haha");         Birthday day = new Birthday();         day.setBirthday("2010-11-22");         bean.setBirthday(day);     }     @After     public void destory() {         jsonArray = null;         jsonObject = null;         bean = null;         System.gc();     }     public final void fail(String string) {         System.out.println(string);     }     public final void failRed(String string) {         System.err.println(string);     } } 上面的init会在每个方法之前运行，destory会在每个方法完成后执行。分别用到了junit的@Before、@After注解，如果你对junit的这些注解不是很了解，可以看看junit官方的测试用例的example和doc；   JSONObject是将Java对象转换成一个json的Object形式，JSONArray是将一个Java对象转换成json的Array格式。   那什么是json的Object形式、Array形式？   用通俗易懂的方法将，所谓的json的Object形式就是一个花括号里面存放的如JavaMap的键值对，如：{name:’hoojo’, age: 24}；   那么json的Array形式呢？   就是中括号，括起来的数组。如：[ ‘json’, true, 22]；   如果你还想了解更多json方面的知识，请看： http://www.json.org/json-zh.html   除了上面的JSONArray、JSONObject可以将Java对象转换成JSON或是相反，将JSON字符串转换成Java对象，还有一个对象也可以完成上面的功能，它就是JSONSerializer；下面我们就来看看它们是怎么玩转Java对象和JSON的。   二、 Java对象序列化成JSON对象   1、 将JavaObject转换吃JSON字符串   在JsonlibTest中添加如下代码：   /*=========================Java Object >>>> JSON String ===========================*/ /**  * <b>function:</b>转Java Bean对象到JSON  * @author hoojo  * @createDate Nov 28, 2010 2:35:54 PM  */ @Test public void writeEntity2JSON() {     fail("==============Java Bean >>> JSON Object==================");     fail(JSONObject.fromObject(bean).toString());     fail("==============Java Bean >>> JSON Array==================");     fail(JSONArray.fromObject(bean).toString());//array会在最外层套上[]     fail("==============Java Bean >>> JSON Object ==================");     fail(JSONSerializer.toJSON(bean).toString());     fail("========================JsonConfig========================");     JsonConfig jsonConfig = new JsonConfig();         jsonConfig.registerJsonValueProcessor(Birthday.class, new JsonValueProcessor() {         public Object processArrayValue(Object value, JsonConfig jsonConfig) {             if (value == null) {                 return new Date();             }             return value;         }         public Object processObjectValue(String key, Object value, JsonConfig jsonConfig) {             fail("key:" + key);             return value + "##修改过的日期";         }     });     jsonObject = JSONObject.fromObject(bean, jsonConfig);     fail(jsonObject.toString());     Student student = (Student) JSONObject.toBean(jsonObject, Student.class);     fail(jsonObject.getString("birthday"));     fail(student.toString());     fail("#####################JsonPropertyFilter############################");     jsonConfig.setJsonPropertyFilter(new PropertyFilter() {         public boolean apply(Object source, String name, Object value) {             fail(source + "%%%" + name + "--" + value);             //忽略birthday属性             if (value != null && Birthday.class.isAssignableFrom(value.getClass())) {                 return true;             }             return false;         }     });        fail(JSONObject.fromObject(bean, jsonConfig).toString());     fail("#################JavaPropertyFilter##################");     jsonConfig.setRootClass(Student.class);         jsonConfig.setJavaPropertyFilter(new PropertyFilter() {         public boolean apply(Object source, String name, Object value) {             fail(name + "@" + value + "#" + source);             if ("id".equals(name) || "email".equals(name)) {                 value = name + "@@";                 return true;             }             return false;         }     });         //jsonObject = JSONObject.fromObject(bean, jsonConfig);     //student = (Student) JSONObject.toBean(jsonObject, Student.class);     //fail(student.toString());     student = (Student) JSONObject.toBean(jsonObject, jsonConfig);     fail("Student:" + student.toString()); } fromObject将Java对象转换成json字符串，toBean将json对象转换成Java对象；   上面方法值得注意的是使用了JsonConfig这个对象，这个对象可以在序列化的时候对JavaObject的数据进行处理、过滤等   上面的jsonConfig的registerJsonValueProcessor方法可以完成对象值的处理和修改，比如处理生日为null时，给一个特定的值。同样setJsonPropertyFilter和setJavaPropertyFilter都是完成对转换后的值的处理。   运行上面的代码可以在控制台看到如下结果：   ==============Java Bean >>> JSON Object================== {"address":"address","birthday":{"birthday":"2010-11-22"},"email":"email","id":1,"name":"haha"} ==============Java Bean >>> JSON Array================== [{"address":"address","birthday":{"birthday":"2010-11-22"},"email":"email","id":1,"name":"haha"}] ==============Java Bean >>> JSON Object ================== {"address":"address","birthday":{"birthday":"2010-11-22"},"email":"email","id":1,"name":"haha"} ========================JsonConfig======================== key:birthday {"address":"address","birthday":"2010-11-22##修改过的日期","email":"email","id":1,"name":"haha"} 2010-11-22##修改过的日期 haha#1#address#null#email #####################JsonPropertyFilter############################ haha#1#address#2010-11-22#email%%%address--address haha#1#address#2010-11-22#email%%%birthday--2010-11-22 haha#1#address#2010-11-22#email%%%email--email haha#1#address#2010-11-22#email%%%id--1 haha#1#address#2010-11-22#email%%%name--haha {"address":"address","email":"email","id":1,"name":"haha"} #################JavaPropertyFilter################## address@address#null#0#null#null#null birthday@2010-11-22##修改过的日期#null#0#address#null#null email@email#null#0#address#null#null id@1#null#0#address#null#null name@haha#null#0#address#null#null Student:haha#0#address#null#null 2、 将JavaList集合转换吃JSON字符串   /**  * <b>function:</b>转换Java List集合到JSON  * @author hoojo  * @createDate Nov 28, 2010 2:36:15 PM  */ @Test public void writeList2JSON() {     fail("==============Java List >>> JSON Array==================");     List<Student> stu = new ArrayList<Student>();     stu.add(bean);     bean.setName("jack");     stu.add(bean);     fail(JSONArray.fromObject(stu).toString());     fail(JSONSerializer.toJSON(stu).toString()); } 运行此方法后，可以看到控制台输出：   ==============Java List >>> JSON Array================== [{"address":"address","birthday":{"birthday":"2010-11-22"},"email":"email","id":1,"name":"jack"}, {"address":"address","birthday":{"birthday":"2010-11-22"},"email":"email","id":1,"name":"jack"}] [{"address":"address","birthday":{"birthday":"2010-11-22"},"email":"email","id":1,"name":"jack"}, {"address":"address","birthday":{"birthday":"2010-11-22"},"email":"email","id":1,"name":"jack"}] 如果你是转换List集合，一定得用JSONArray或是JSONSrializer提供的序列化方法。如果你用JSONObject.fromObject方法转换List会出现异常，通常使用JSONSrializer这个JSON序列化的方法，它会自动识别你传递的对象的类型，然后转换成相应的JSON字符串。   3、 将Map集合转换成JSON对象   /**  * <b>function:</b>转Java Map对象到JSON  * @author hoojo  * @createDate Nov 28, 2010 2:37:35 PM  */ @Test public void writeMap2JSON() {     Map<String, Object> map = new HashMap<String, Object>();     map.put("A", bean);     bean.setName("jack");     map.put("B", bean);     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]; }");       fail("==============Java Map >>> JSON Object==================");     fail(JSONObject.fromObject(map).toString());     fail("==============Java Map >>> JSON Array ==================");     fail(JSONArray.fromObject(map).toString());     fail("==============Java Map >>> JSON Object==================");     fail(JSONSerializer.toJSON(map).toString()); } 上面的Map集合有JavaBean、String、Boolean、Integer、以及Array和js的function函数的字符串。   运行上面的程序，结果如下：   ==============Java Map >>> JSON Object================== {"arr":["a","b"],"A":{"address":"address","birthday":{"birthday":"2010-11-22"},"email":"email","id":1,"name":"jack"},"int":1, "B":{"address":"address","birthday":{"birthday":"2010-11-22"},"email":"email","id":1,"name":"jack"},"name":"json", "func":function(i){ return this.arr[i]; },"bool":true} ==============Java Map >>> JSON Array ================== [{"arr":["a","b"],"A":{"address":"address","birthday":{"birthday":"2010-11-22"},"email":"email","id":1,"name":"jack"},"int":1, "B":{"address":"address","birthday":{"birthday":"2010-11-22"},"email":"email","id":1,"name":"jack"},"name":"json", "func":function(i){ return this.arr[i]; },"bool":true}] ==============Java Map >>> JSON Object================== {"arr":["a","b"],"A":{"address":"address","birthday":{"birthday":"2010-11-22"},"email":"email","id":1,"name":"jack"},"int":1, "B":{"address":"address","birthday":{"birthday":"2010-11-22"},"email":"email","id":1,"name":"jack"},"name":"json", "func":function(i){ return this.arr[i]; },"bool":true} 4、 将更多类型转换成JSON   /**  * <b>function:</b>  转换更多数组类型到JSON  * @author hoojo  * @createDate Nov 28, 2010 2:39:19 PM  */ @Test public void writeObject2JSON() {     String[] sa = {"a", "b", "c"};     fail("==============Java StringArray >>> JSON Array ==================");     fail(JSONArray.fromObject(sa).toString());     fail(JSONSerializer.toJSON(sa).toString());     fail("==============Java boolean Array >>> JSON Array ==================");     boolean[] bo = { true, false, true };     fail(JSONArray.fromObject(bo).toString());     fail(JSONSerializer.toJSON(bo).toString());     Object[] o = { 1, "a", true, 'A', sa, bo };     fail("==============Java Object Array >>> JSON Array ==================");     fail(JSONArray.fromObject(o).toString());     fail(JSONSerializer.toJSON(o).toString());     fail("==============Java String >>> JSON ==================");     fail(JSONArray.fromObject("['json','is','easy']").toString());     fail(JSONObject.fromObject("{'json':'is easy'}").toString());     fail(JSONSerializer.toJSON("['json','is','easy']").toString());     fail("==============Java JSONObject >>> JSON ==================");     jsonObject = new JSONObject()             .element("string", "JSON")         .element("integer", "1")         .element("double", "2.0")         .element("boolean", "true");        fail(JSONSerializer.toJSON(jsonObject).toString());     fail("==============Java JSONArray >>> JSON ==================");     jsonArray = new JSONArray()             .element( "JSON" )             .element( "1" )             .element( "2.0" )             .element( "true" );       fail(JSONSerializer.toJSON(jsonArray).toString());     fail("==============Java JSONArray JsonConfig#setArrayMode >>> JSON ==================");     List input = new ArrayList();         input.add("JSON");     input.add("1");     input.add("2.0");     input.add("true");         JSONArray jsonArray = (JSONArray) JSONSerializer.toJSON( input );         JsonConfig jsonConfig = new JsonConfig();         jsonConfig.setArrayMode( JsonConfig.MODE_OBJECT_ARRAY );         Object[] output = (Object[]) JSONSerializer.toJava(jsonArray, jsonConfig);     System.out.println(output[0]);     fail("==============Java JSONFunction >>> JSON ==================");     String str = "{'func': function( param ){ doSomethingWithParam(param); }}";         JSONObject jsonObject = (JSONObject) JSONSerializer.toJSON(str);         JSONFunction func = (JSONFunction) jsonObject.get("func");         fail(func.getParams()[0]);         fail(func.getText() );     } 运行后结果如下：   ==============Java StringArray >>> JSON Array ================== ["a","b","c"] ["a","b","c"] ==============Java boolean Array >>> JSON Array ================== [true,false,true] [true,false,true] ==============Java Object Array >>> JSON Array ================== [1,"a",true,"A",["a","b","c"],[true,false,true]] [1,"a",true,"A",["a","b","c"],[true,false,true]] ==============Java String >>> JSON ================== ["json","is","easy"] {"json":"is easy"} ["json","is","easy"] ==============Java JSONObject >>> JSON ================== {"string":"JSON","integer":"1","double":"2.0","boolean":"true"} ==============Java JSONArray >>> JSON ================== ["JSON","1","2.0","true"] ==============Java JSONArray JsonConfig#setArrayMode >>> JSON ================== JSON ==============Java JSONFunction >>> JSON ================== param doSomethingWithParam(param); 这里还有一个JSONFunction的对象，可以转换JavaScript的function。可以获取方法参数和方法体。同时，还可以用JSONObject、JSONArray构建Java对象，完成Java对象到JSON字符串的转换。   三、 JSON对象反序列化成Java对象   1、 将json字符串转成Java对象   private String json = "{\"address\":\"chian\",\"birthday\":{\"birthday\":\"2010-11-22\"}," +         "\"email\":\" [email protected]\",\"id\":22,\"name\":\"tom\"}"; /**  * <b>function:</b>将json字符串转化为java对象  * @author hoojo  * @createDate Nov 28, 2010 3:01:16 PM  */ @Test public void readJSON2Bean() {     fail("==============JSON Object String >>> Java Bean ==================");     jsonObject = JSONObject.fromObject(json);     Student stu = (Student) JSONObject.toBean(jsonObject, Student.class);     fail(stu.toString()); } 运行后，结果如下：   ==============JSON Object String >>> Java Bean ================== tom#22#chian#2010-11-22#[email protected] 2、 将json字符串转换成动态Java对象(MorphDynaBean)   private String json = "{\"address\":\"chian\",\"birthday\":{\"birthday\":\"2010-11-22\"},"+         "\"email\":\" [email protected]\",\"id\":22,\"name\":\"tom\"}"; @Test public void readJSON2DynaBean() {     try {         fail("==============JSON Object String >>> Java MorphDynaBean ==================");         JSON jo = JSONSerializer.toJSON(json);         Object o = JSONSerializer.toJava(jo);//MorphDynaBean         fail(PropertyUtils.getProperty(o, "address").toString());         jsonObject = JSONObject.fromObject(json);         fail(jsonObject.getString("email"));         o = JSONSerializer.toJava(jsonObject);//MorphDynaBean         fail(PropertyUtils.getProperty(o, "name").toString());     } catch (IllegalAccessException e) {         e.printStackTrace();     } catch (InvocationTargetException e) {         e.printStackTrace();     } catch (NoSuchMethodException e) {         e.printStackTrace();     } } 转换后的对象Object是一个MorphDynaBean的动态JavaBean，通过PropertyUtils可以获得指定的属性的值。   运行后结果如下：   ==============JSON Object String >>> Java MorphDynaBean ============= chian [email protected] tom 3、 将json字符串转成Java的Array数组   private String json = "{\"address\":\"chian\",\"birthday\":{\"birthday\":\"2010-11-22\"},"+         "\"email\":\" [email protected]\",\"id\":22,\"name\":\"tom\"}"; @Test public void readJSON2Array() {     try {         fail("==============JSON Arry String >>> Java Array ==================");         json = "[" + json + "]";         jsonArray = JSONArray.fromObject(json);         fail("#%%%" + jsonArray.get(0).toString());         Object[] os = jsonArray.toArray();         System.out.println(os.length);         fail(JSONArray.fromObject(json).join(""));         fail(os[0].toString());         Student[] stus = (Student[]) JSONArray.toArray(jsonArray, Student.class);         System.out.println(stus.length);         System.out.println(stus[0]);     } catch (Exception e) {         e.printStackTrace();     } } 运行的结果如下：   ==============JSON Arry String >>> Java Array ================== #%%%{"address":"chian","birthday":{"birthday":"2010-11-22"},"email":" [email protected]","id":22,"name":"tom"} 1 {"address":"chian","birthday":{"birthday":"2010-11-22"},"email":" [email protected]","id":22,"name":"tom"} {"address":"chian","birthday":{"birthday":"2010-11-22"},"email":" [email protected]","id":22,"name":"tom"} 1 tom#22#chian#2010-11-22#[email protected] 4、 将JSON字符串转成Java的List集合   private String json = "{\"address\":\"chian\",\"birthday\":{\"birthday\":\"2010-11-22\"},"+         "\"email\":\" [email protected]\",\"id\":22,\"name\":\"tom\"}"; @Test public void readJSON2List() {     try {         fail("==============JSON Arry String >>> Java List ==================");         json = "[" + json + "]";         jsonArray = JSONArray.fromObject(json);         List<Student> list = JSONArray.toList(jsonArray, Student.class);         System.out.println(list.size());         System.out.println(list.get(0));         list = JSONArray.toList(jsonArray);         System.out.println(list.size());         System.out.println(list.get(0));//MorphDynaBean     } catch (Exception e) {         e.printStackTrace();     } } 运行后结果如下：   ==============JSON Arry String >>> Java List ================== 1 tom#22#chian#2010-11-22#[email protected] 1 net.sf.ezmorph.bean.MorphDynaBean@141b571[   {id=22,   birthday=net.sf.ezmorph.bean.MorphDynaBean@b23210[   {birthday=2010-11-22} ], address=chian,   [email protected], name=tom} ] 5、 将json字符串转换成Collection接口   private String json = "{\"address\":\"chian\",\"birthday\":{\"birthday\":\"2010-11-22\"},"+         "\"email\":\" [email protected]\",\"id\":22,\"name\":\"tom\"}"; @Test public void readJSON2Collection() {     try {         fail("==============JSON Arry String >>> Java Collection ==================");         json = "[" + json + "]";         jsonArray = JSONArray.fromObject(json);         Collection<Student> con = JSONArray.toCollection(jsonArray, Student.class);         System.out.println(con.size());         Object[] stt = con.toArray();         System.out.println(stt.length);         fail(stt[0].toString());     } catch (Exception e) {         e.printStackTrace();     } } 刚才上面的将json转换成list提示该方法过时，这里有toCollection，可以用此方法代替toList方法；运行后结果如下：   ==============JSON Arry String >>> Java Collection ================== 1 1 tom#22#chian#2010-11-22#[email protected] 6、 将json字符串转换成Map集合   @Test public void readJSON2Map() {     try {         fail("==============JSON Arry String >>> Java Map ==================");         json = "{\"arr\":[\"a\",\"b\"],\"A\":{\"address\":\"address\",\"birthday\":{\"birthday\":\"2010-11-22\"},"+         "\"email\":\"email\",\"id\":1,\"name\":\"jack\"},\"int\":1,"+         "\"B\":{\"address\":\"address\",\"birthday\":{\"birthday\":\"2010-11-22\"},"+         "\"email\":\"email\",\"id\":1,\"name\":\"jack\"},\"name\":\"json\",\"bool\":true}";         jsonObject = JSONObject.fromObject(json);         Map<String, Class<?>> clazzMap = new HashMap<String, Class<?>>();         clazzMap.put("arr", String[].class);         clazzMap.put("A", Student.class);         clazzMap.put("B", Student.class);         Map<String, ?> mapBean = (Map) JSONObject.toBean(jsonObject, Map.class, clazzMap);         System.out.println(mapBean);         Set<String> set = mapBean.keySet();         Iterator<String> iter = set.iterator();         while (iter.hasNext()) {             String key = iter.next();             fail(key + ":" + mapBean.get(key).toString());         }     } catch (Exception e) {         e.printStackTrace();     } } 运行后结果如下：   ==============JSON Arry String >>> Java Map ================== {A=jack#1#address#2010-11-22#email, arr=[a, b], B=jack#1#address#2010-11-22#email, int=1, name=json, bool=true} A:jack#1#address#2010-11-22#email arr:[a, b] B:jack#1#address#2010-11-22#email int:1 name:json bool:true 四、 JSON-lib对XML的支持   1、 将Java对象到XML   /*============================Java Object >>>>> XML ==========================*/ /**  * <b>function:</b> 转换Java对象到XML  * 需要额外的jar包：xom.jar  * @author hoojo  * @createDate Nov 28, 2010 2:39:55 PM  */ @Test public void writeObject2XML() {     XMLSerializer xmlSerializer = new XMLSerializer();     fail("==============Java String Array >>> XML ==================");     //xmlSerializer.setElementName("bean");     fail(xmlSerializer.write(JSONArray.fromObject(bean)));     String[] sa = {"a", "b", "c"};     fail("==============Java String Array >>> XML ==================");     fail(xmlSerializer.write(JSONArray.fromObject(sa)));     fail("==============Java boolean Array >>> XML ==================");     boolean[] bo = { true, false, true };     fail(xmlSerializer.write(JSONArray.fromObject(bo)));     fail(xmlSerializer.write(JSONSerializer.toJSON(bo)));     Object[] o = { 1, "a", true, 'A', sa, bo };     fail("==============Java Object Array >>> JSON Array ==================");     fail(xmlSerializer.write(JSONArray.fromObject(o)));     fail(xmlSerializer.write(JSONSerializer.toJSON(o)));     fail("==============Java String >>> JSON ==================");     fail(xmlSerializer.write(JSONArray.fromObject("['json','is','easy']")).toString());     fail(xmlSerializer.write(JSONObject.fromObject("{'json':'is easy'}")).toString());     fail(xmlSerializer.write(JSONSerializer.toJSON("['json','is','easy']")).toString()); } 主要运用的是XMLSerializer的write方法，这个方法可以完成java对象到xml的转换，不过你很容易就可以看到这个xml序列化对象，需要先将java对象转成json对象，然后再将json转换吃xml文档。   运行后结果如下：   ==============Java String Array >>> XML ================== <?xml version="1.0" encoding="UTF-8"?> <a><e class="object"> <address type="string">address</address><birthday class="object"><birthday type="string">2010-11-22</birthday></birthday> <email type="string">email</email><id type="number">1</id><name type="string">haha</name> </e></a> ==============Java String Array >>> XML ================== <?xml version="1.0" encoding="UTF-8"?> <a><e type="string">a</e><e type="string">b</e><e type="string">c</e></a> ==============Java boolean Array >>> XML ================== <?xml version="1.0" encoding="UTF-8"?> <a><e type="boolean">true</e><e type="boolean">false</e><e type="boolean">true</e></a> <?xml version="1.0" encoding="UTF-8"?> <a><e type="boolean">true</e><e type="boolean">false</e><e type="boolean">true</e></a> ==============Java Object Array >>> JSON Array ================== <?xml version="1.0" encoding="UTF-8"?> <a><e type="number">1</e><e type="string">a</e><e type="boolean">true</e><e type="string">A</e><e class="array"> <e type="string">a</e><e type="string">b</e><e type="string">c</e></e><e class="array"><e type="boolean">true</e> <e type="boolean">false</e><e type="boolean">true</e></e></a> <?xml version="1.0" encoding="UTF-8"?> <a><e type="number">1</e><e type="string">a</e><e type="boolean">true</e><e type="string">A</e><e class="array"> <e type="string">a</e><e type="string">b</e><e type="string">c</e></e><e class="array"><e type="boolean">true</e> <e type="boolean">false</e><e type="boolean">true</e></e></a> ==============Java String >>> JSON ================== <?xml version="1.0" encoding="UTF-8"?> <a><e type="string">json</e><e type="string">is</e><e type="string">easy</e></a> <?xml version="1.0" encoding="UTF-8"?> <o><json type="string">is easy</json></o> <?xml version="1.0" encoding="UTF-8"?> <a><e type="string">json</e><e type="string">is</e><e type="string">easy</e></a> 上面的节点名称有点乱，你可以通过setElementName设置节点名称   2、 将XML转换成Java对象   /*============================XML String >>>>> Java Object ==========================*/ /**  * <b>function:</b>转换xml文档到java对象  * @author hoojo  * @createDate Nov 28, 2010 3:00:27 PM  */ @Test public void readXML2Object() {     XMLSerializer xmlSerializer = new XMLSerializer();     fail("============== XML >>>> Java String Array ==================");     String[] sa = {"a", "b", "c"};     jsonArray = (JSONArray) xmlSerializer.read(xmlSerializer.write(JSONArray.fromObject(sa)));     fail(jsonArray.toString());     String[] s = (String[]) JSONArray.toArray(jsonArray, String.class);     fail(s[0].toString());     fail("============== XML >>>> Java boolean Array ==================");     boolean[] bo = { true, false, true };     jsonArray = (JSONArray) xmlSerializer.read(xmlSerializer.write(JSONArray.fromObject(bo)));     bo = (boolean[]) JSONArray.toArray(jsonArray, boolean.class);     fail(bo.toString());     System.out.println(bo[0]);     jsonArray = (JSONArray) xmlSerializer.read(xmlSerializer.write(JSONSerializer.toJSON(bo)));     bo = (boolean[]) JSONArray.toArray(jsonArray, boolean.class);     fail(bo.toString());     System.out.println(bo[0]);     fail("==============Java Object Array >>> JSON Array ==================");     Object[] o = { 1, "a", true, 'A', sa, bo };     jsonArray = (JSONArray) xmlSerializer.read(xmlSerializer.write(JSONArray.fromObject(o)));     System.out.println(jsonArray.getInt(0));     System.out.println(jsonArray.get(1));     System.out.println(jsonArray.getBoolean(2));     jsonArray = (JSONArray) xmlSerializer.read(xmlSerializer.write(JSONSerializer.toJSON(o)));     System.out.println(jsonArray.get(4));     System.out.println(jsonArray.getJSONArray(5).get(0));     System.out.println(jsonArray.get(5));     fail("==============Java String >>> JSON ==================");     jsonArray = (JSONArray) xmlSerializer.read(xmlSerializer.write(JSONArray.fromObject("['json','is','easy']")).toString());     s = (String[]) JSONArray.toArray(jsonArray, String.class);     fail(s[0].toString());     jsonObject = (JSONObject) xmlSerializer.read(xmlSerializer.write(JSONObject.fromObject("{'json':'is easy'}")).toString());     Object obj = JSONObject.toBean(jsonObject);     System.out.println(obj);     jsonArray = (JSONArray) xmlSerializer.read(xmlSerializer.write(JSONSerializer.toJSON("['json','is','easy']")).toString());     s = (String[]) JSONArray.toArray(jsonArray, String.class);     fail(s[1].toString()); } 主要运用到XMLSerializer的read方法，将xml内容读取后，转换成Java对象。运行后结果如下：   ============== XML >>>> Java String Array ================== ["a","b","c"] a ============== XML >>>> Java boolean Array ================== [Z@15856a5 true [Z@79ed7f true ==============Java Object Array >>> JSON Array ================== 1 a true ["a","b","c"] true ["true","false","true"] ==============Java String >>> JSON ================== json net.sf.ezmorph.bean.MorphDynaBean@c09554[   {json=is easy} ] is 3、 将xml的字符串内容，转换成Java的Array对象   @Test public void testReadXml2Array() {     String str = "<a class=\"array\">" +               "<e type=\"function\" params=\"i,j\">" +              "return matrix[i][j];" +                "</e>" +            "</a>";     JSONArray json = (JSONArray) new XMLSerializer().read(str);     fail(json.toString());     } 上面是一段xml字符串格式的文档，将其转换为JSONArray对象。转换后结果如下：   [function(i,j){ return matrix[i][j]; }] 就是一个数组； 作者：hoojo   出处：   http://www.cnblogs.com/hoojo/archive/2011/04/21/2023805.html   blog： http://blog.csdn.net/IBM_hoojo