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; publicclass Student { privateint 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; publicclass Birthday { private String birthday;public Birthday(String birthday) { super(); this.birthday = birthday; } //setter、getter public Birthday() {} @Overridepublic 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 [e-mail] * @version 1.0 */@SuppressWarnings({"deprecation", "unchecked" })publicclass 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); } @Afterpublic void destory() { jsonArray = null; jsonObject = null; bean = null; System.gc(); }public finalvoid fail(String string) { System.out.println(string); }public finalvoid 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 */@Testpublicvoid 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--addresshaha#1#address#2010-11-22#email%%%birthday--2010-11-22haha#1#address#2010-11-22#email%%%email--emailhaha#1#address#2010-11-22#email%%%id--1haha#1#address#2010-11-22#email%%%name--haha{"address":"address","email":"email","id":1,"name":"haha"}#################JavaPropertyFilter##################address@address#null#0#null#null#nullbirthday@2010-11-22##修改过的日期#null#0#address#null#nullemail@email#null#0#address#null#nullid@1#null#0#address#null#nullname@haha#null#0#address#null#nullStudent: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 */@Testpublic 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 */@Testpublic 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 */@Testpublic 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"]==============Javaboolean 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 ==================paramdoSomethingWithParam(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\":\"[e-mail]\",\"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 */@Testpublicvoid 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#[e-mail]

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\":\"[e-mail]\",\"id\":22,\"name\":\"tom\"}"; @Testpublicvoid 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 =============[e-mail]

3、 将json字符串转成Java的Array数组

private String json = "{\"address\":\"chian\",\"birthday\":{\"birthday\":\"2010-11-22\"},"+ "\"email\":\"[e-mail]\",\"id\":22,\"name\":\"tom\"}"; @Testpublicvoid 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":"[e-mail]","id":22,"name":"tom"}1{"address":"chian","birthday":{"birthday":"2010-11-22"},"email":"[e-mail]","id":22,"name":"tom"}{"address":"chian","birthday":{"birthday":"2010-11-22"},"email":"[e-mail]","id":22,"name":"tom"}1tom#22#chian#2010-11-22#[e-mail]

4、 将JSON字符串转成Java的List集合

private String json = "{\"address\":\"chian\",\"birthday\":{\"birthday\":\"2010-11-22\"},"+ "\"email\":\"[e-mail]\",\"id\":22,\"name\":\"tom\"}"; @Testpublicvoid 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 ==================1tom#22#chian#2010-11-22#[e-mail]@141b571[ {id=22, birthday=net.sf.ezmorph.bean.MorphDynaBean@b23210[ {birthday=2010-11-22}], address=chian, email=[e-mail], 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\":\"[e-mail]\",\"id\":22,\"name\":\"tom\"}"; @Testpublicvoid 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 ==================11tom#22#chian#2010-11-22#[e-mail]

6、 将json字符串转换成Map集合

@Testpublic 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#emailarr:[a, b]B:jack#1#address#2010-11-22#emailint:1name:jsonbool: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 */@Testpublicvoid 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 ==================<?xmlversion="1.0"encoding="UTF-8"?><a><eclass="object"><addresstype="string">address</address><birthdayclass="object"><birthdaytype="string">2010-11-22</birthday></birthday><emailtype="string">email</email><idtype="number">1</id><nametype="string">haha</name></e></a> ==============Java String Array >>> XML ==================<?xmlversion="1.0"encoding="UTF-8"?><a><etype="string">a</e><etype="string">b</e><etype="string">c</e></a> ==============Java boolean Array >>> XML ==================<?xmlversion="1.0"encoding="UTF-8"?><a><etype="boolean">true</e><etype="boolean">false</e><etype="boolean">true</e></a> <?xmlversion="1.0"encoding="UTF-8"?><a><etype="boolean">true</e><etype="boolean">false</e><etype="boolean">true</e></a> ==============Java Object Array >>> JSON Array ==================<?xmlversion="1.0"encoding="UTF-8"?><a><etype="number">1</e><etype="string">a</e><etype="boolean">true</e><etype="string">A</e><eclass="array"><etype="string">a</e><etype="string">b</e><etype="string">c</e></e><eclass="array"><etype="boolean">true</e><etype="boolean">false</e><etype="boolean">true</e></e></a> <?xmlversion="1.0"encoding="UTF-8"?><a><etype="number">1</e><etype="string">a</e><etype="boolean">true</e><etype="string">A</e><eclass="array"><etype="string">a</e><etype="string">b</e><etype="string">c</e></e><eclass="array"><etype="boolean">true</e><etype="boolean">false</e><etype="boolean">true</e></e></a> ==============Java String >>> JSON ==================<?xmlversion="1.0"encoding="UTF-8"?><a><etype="string">json</e><etype="string">is</e><etype="string">easy</e></a> <?xmlversion="1.0"encoding="UTF-8"?><o><jsontype="string">is easy</json></o> <?xmlversion="1.0"encoding="UTF-8"?><a><etype="string">json</e><etype="string">is</e><etype="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 */@Testpublicvoid 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 >>>> Javaboolean Array ==================[Z@15856a5true[Z@79ed7ftrue==============Java Object Array >>> JSON Array ==================1atrue["a","b","c"]true["true","false","true"]==============Java String >>> JSON ==================jsonnet.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

@Testpublic 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；