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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 hoojo_@126.com * @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@123.com\",\"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@123.com 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@123.com\",\"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@123.com 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@123.com\",\"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@123.com","id":22,"name":"tom"} 1 {"address":"chian","birthday":{"birthday":"2010-11-22"},"email":"email@123.com","id":22,"name":"tom"} {"address":"chian","birthday":{"birthday":"2010-11-22"},"email":"email@123.com","id":22,"name":"tom"} 1 tom#22#chian#2010-11-22#email@123.com 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@123.com\",\"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@123.com 1 net.sf.ezmorph.bean.MorphDynaBean@141b571[ {id=22, birthday=net.sf.ezmorph.bean.MorphDynaBean@b23210[ {birthday=2010-11-22} ], address=chian, email=email@123.com, 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@123.com\",\"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@123.com 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;
http://www.cnblogs.com/hoojo/archive/2011/04/21/2023805.html
- json-xml.zip (863.4 KB)
- 下载次数: 34
评论
2 楼
hanyi366
2011-10-11
呵呵,相关jar包可以在附件里下载
1 楼
trunami_nb
2011-09-27
好资料呀!可是相关的jar包找不到,外国网站不能访问,哪位兄弟能传给我吗?
谢谢!!!!!!
QQ:178018596
谢谢!!!!!!
QQ:178018596
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