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:
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
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:
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:
* @author hoojo * @createDate Nov 28, 2010 2:35:54 PM */@Testpublic
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:
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
*/@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:
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
*/@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:
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
*/@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:
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 ==================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
"{\"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 */@Testpublic
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:
2、 将json字符串转换成动态Java对象(MorphDynaBean)
"{\"address\":\"chian\",\"birthday\":{\"birthday\":\"2010-11-22\"},"+
"\"email\":\"email@123.com\",\"id\":22,\"name\":\"tom\"}"; @Testpublic
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:
3、 将json字符串转成Java的Array数组
"{\"address\":\"chian\",\"birthday\":{\"birthday\":\"2010-11-22\"},"+
"\"email\":\"email@123.com\",\"id\":22,\"name\":\"tom\"}"; @Testpublic
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:
4、 将JSON字符串转成Java的List集合
"{\"address\":\"chian\",\"birthday\":{\"birthday\":\"2010-11-22\"},"+
"\"email\":\"email@123.com\",\"id\":22,\"name\":\"tom\"}"; @Testpublic
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:
name=tom}]
5、 将json字符串转换成Collection接口
"{\"address\":\"chian\",\"birthday\":{\"birthday\":\"2010-11-22\"},"+
"\"email\":\"email@123.com\",\"id\":22,\"name\":\"tom\"}"; @Testpublic
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:
6、 将json字符串转换成Map集合
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:
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
* @author hoojo * @createDate Nov 28, 2010 2:39:55 PM */@Testpublic
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:
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
* @author hoojo * @createDate Nov 28, 2010 3:00:27 PM */@Testpublic
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:
boolean 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
"<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:
就是一个数组;