xStream完美转换XML、JSON

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xStream完美转换XML、JSON

xStream**框架**

xStream可以轻易的将Java对象和xml文档相互转换，而且可以修改某个特定的属性和节点名称，而且也支持json的转换；

前面有介绍过json-lib这个框架，在线博文：http://www.cnblogs.com/hoojo/archive/2011/04/21/2023805.html

以及Jackson这个框架，在线博文：http://www.cnblogs.com/hoojo/archive/2011/04/22/2024628.html

它们都完美支持JSON，但是对xml的支持还不是很好。一定程度上限制了对Java对象的描述，不能让xml完全体现到对Java对象的描述。这里将会介绍xStream对JSON、XML的完美支持。xStream不仅对XML的转换非常友好，而且提供annotation注解，可以在JavaBean中完成对xml节点、属性的描述。以及对JSON也支持，只需要提供相关的JSONDriver就可以完成转换。

一、**准备工作**

1、 下载jar包、及官方资源

xStream的jar下载地址：

https://nexus.codehaus.org/content/repositories/releases/com/thoughtworks/xstream/xstream-distribution/1.3.1/xstream-distribution-1.3.1-bin.zip

官方的示例很全，官方参考示例：http://xstream.codehaus.org/tutorial.html

添加xstream-1.3.1.jar文件到工程中，就可以开始下面的工作；需要的jar如下：

clip_image002

2、 测试用例代码 package com.hoo.test;

import java.io.IOException; import java.io.ObjectInputStream;

import java.io.ObjectOutputStream; import java.io.StringReader;

import java.io.Writer; import java.util.ArrayList;

import java.util.HashMap; import java.util.Iterator;

import java.util.List; import java.util.Map;

import java.util.Set; import org.codehaus.jettison.json.JSONException;

import org.junit.After; import org.junit.Before;

import org.junit.Test; import com.hoo.entity.Birthday;

import com.hoo.entity.Classes; import com.hoo.entity.ListBean;

import com.hoo.entity.Student; import com.thoughtworks.xstream.XStream;

import com.thoughtworks.xstream.io.HierarchicalStreamWriter; import com.thoughtworks.xstream.io.json.JettisonMappedXmlDriver;

import com.thoughtworks.xstream.io.json.JsonHierarchicalStreamDriver; import com.thoughtworks.xstream.io.json.JsonWriter;

/// /* function:Java对象和XML字符串的相互转换

/ jar-lib-version: xstream-1.3.1 / @author hoojo

/ @createDate Nov 27, 2010 12:15:15 PM / @file XStreamTest.java

/ @package com.hoo.test / @project WebHttpUtils

/ @blog http://blog.csdn.net/IBM_hoojo / @email hoojo_@126.com

/ @version 1.0 //

@SuppressWarnings("unchecked") public class XStreamTest {

private XStream xstream = null; private ObjectOutputStream out = null;

private ObjectInputStream in = null; private Student bean = null;

/// /* function:初始化资源准备

/ @author hoojo / @createDate Nov 27, 2010 12:16:28 PM

/*/ @Before

public void init() { try {

xstream = new XStream(); //xstream = new XStream(new DomDriver()); // 需要xpp3 jar

} catch (Exception e) { e.printStackTrace();

} bean = new Student();

bean.setAddress("china"); bean.setEmail("jack@email.com");

bean.setId(1); bean.setName("jack");

Birthday day = new Birthday(); day.setBirthday("2010-11-22");

bean.setBirthday(day); }

/// /* function:释放对象资源

/ @author hoojo / @createDate Nov 27, 2010 12:16:38 PM

/*/ @After

public void destory() { xstream = null;

bean = null; try {

if (out != null) { out.flush();

out.close(); }

if (in != null) { in.close();

} } catch (IOException e) {

e.printStackTrace(); }

System.gc(); }

public final void fail(String string) { System.out.println(string);

} public final void failRed(String string) {

System.err.println(string); }

}

通过XStream对象的toXML方法就可以完成Java对象到XML的转换，toXML方法还有2个相同签名的方法，需要传递一个流。然后通过流来完成xml信息的输出。

3、 需要的JavaBean package com.hoo.entity;

public class Student { private int id;

private String name; private String email;

private String address; private Birthday birthday;

//getter、setter public String toString() {

return this.name + "/#" + this.id + "/#" + this.address + "/#" + this.birthday + "/#" + this.email; }

}

二、**Java转换成XML**

1、 JavaBean转换XM ///

/ function:Java对象转换成XML字符串 / @author hoojo

/ @createDate Nov 27, 2010 12:19:01 PM //

@Test public void writeBean2XML() {

try { fail("------------Bean->XML------------");

fail(xstream.toXML(bean)); fail("重命名后的XML");

//类重命名 //xstream.alias("account", Student.class);

//xstream.alias("生日", Birthday.class); //xstream.aliasField("生日", Student.class, "birthday");

//xstream.aliasField("生日", Birthday.class, "birthday"); //fail(xstream.toXML(bean));

//属性重命名 xstream.aliasField("邮件", Student.class, "email");

//包重命名 xstream.aliasPackage("hoo", "com.hoo.entity");

fail(xstream.toXML(bean)); } catch (Exception e) {

e.printStackTrace(); }

}

看结果中的第一份xml内容，是没有经过然后修改或重命名的文档，按照原样输出。文档中的第二份文档的package经过重命名，email属性也经过重命名以及类名也可以进行重命名的。

运行后结果如下： ------------Bean->XML------------

1 jack jack@email.com
china
2010-11-22 重命名后的XML 1 jack <邮件>jack@email.com</邮件>
china
2010-11-22 2、 将List集合转换成xml文档 /// / function:将Java的List集合转换成XML对象 / @author hoojo / @createDate Nov 27, 2010 12:20:07 PM // @Test public void writeList2XML() { try { //修改元素名称 xstream.alias("beans", ListBean.class); xstream.alias("student", Student.class); fail("----------List-->XML----------"); ListBean listBean = new ListBean(); listBean.setName("this is a List Collection"); List list = new ArrayList(); list.add(bean); list.add(bean);//引用bean //list.add(listBean);//引用listBean，父元素 bean = new Student(); bean.setAddress("china"); bean.setEmail("tom@125.com"); bean.setId(2); bean.setName("tom"); Birthday day = new Birthday("2010-11-22"); bean.setBirthday(day); list.add(bean); listBean.setList(list); //将ListBean中的集合设置空元素，即不显示集合元素标签 //xstream.addImplicitCollection(ListBean.class, "list"); //设置reference模型 //xstream.setMode(XStream.NO_REFERENCES);//不引用 xstream.setMode(XStream.ID_REFERENCES);//id引用 //xstream.setMode(XStream.XPATH_ABSOLUTE_REFERENCES);//绝对路径引用 //将name设置为父类（Student）的元素的属性 xstream.useAttributeFor(Student.class, "name"); xstream.useAttributeFor(Birthday.class, "birthday"); //修改属性的name xstream.aliasAttribute("姓名", "name"); xstream.aliasField("生日", Birthday.class, "birthday"); fail(xstream.toXML(listBean)); } catch (Exception e) { e.printStackTrace(); } } 上面的代码运行后，结果如下： ----------List-->XML---------- this is a List Collection

1 jack@email.com
china
 2 tom@125.com
china

如果不加xstream.addImplicitCollection(ListBean.class, "list");

这个设置的话，会出现一个List节点包裹着Student节点元素。添加addImplicitCollection可以忽略这个list节点元素。那么上面的list节点就不存在，只会在beans元素中出现name、student这2个xml元素标签；

setMode是设置相同的对象的引用方式，如果设置XStream.NO_REFERENCES就是不引用，会输出2分相同的Student元素。如果是XStream.ID_REFERENCES会引用相同的那个对象的id属性，如果是XStream.XPATH_ABSOLUTE_REFERENCES引用，那么它将显示xpath路径。上面采用的id引用，这个引用了id=3的那个student标签元素；

useAttributeFor是设置某个节点显示到父节点的属性中，也就是将指定class中的指定属性，在这个class元素节点的属性中显示。

如：hoojo

设置好后就是这样的结果：

aliasAttribute是修改属性名称。

3、 在JavaBean中添加Annotation注解进行重命名设置

先看看JavaBean的代码 package com.hoo.entity;

import java.util.Arrays; import java.util.Calendar;

import java.util.GregorianCalendar; import java.util.List;

import com.thoughtworks.xstream.annotations.XStreamAlias; import com.thoughtworks.xstream.annotations.XStreamAsAttribute;

import com.thoughtworks.xstream.annotations.XStreamConverter; import com.thoughtworks.xstream.annotations.XStreamImplicit;

import com.thoughtworks.xstream.annotations.XStreamOmitField; @XStreamAlias("class")

public class Classes { //*

/ 设置属性显示 //

@XStreamAsAttribute @XStreamAlias("名称")

private String name; //*

/ 忽略 //

@XStreamOmitField private int number;

@XStreamImplicit(itemFieldName = "Students") private List students;

@SuppressWarnings("unused") @XStreamConverter(SingleValueCalendarConverter.class)

private Calendar created = new GregorianCalendar(); public Classes(){}

public Classes(String name, Student... stu) { this.name = name;

this.students = Arrays.asList(stu); }

//getter、setter }

SingleValueCalendarConverter.java这个是一个类型转换器

package com.hoo.entity;

import java.util.Calendar; import java.util.Date;

import java.util.GregorianCalendar; import com.thoughtworks.xstream.converters.Converter;

import com.thoughtworks.xstream.converters.MarshallingContext; import com.thoughtworks.xstream.converters.UnmarshallingContext;

import com.thoughtworks.xstream.io.HierarchicalStreamReader; import com.thoughtworks.xstream.io.HierarchicalStreamWriter;

public class SingleValueCalendarConverter implements Converter { public void marshal(Object source, HierarchicalStreamWriter writer,

MarshallingContext context) { Calendar calendar = (Calendar) source;

writer.setValue(String.valueOf(calendar.getTime().getTime())); }

public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {

GregorianCalendar calendar = new GregorianCalendar(); calendar.setTime(new Date(Long.parseLong(reader.getValue())));

return calendar; }

@SuppressWarnings("unchecked") public boolean canConvert(Class type) {

return type.equals(GregorianCalendar.class); }

}

再看看测试用例代码

@Test

public void writeList2XML4Annotation() { try {

failRed("---------annotation Bean --> XML---------"); Student stu = new Student();

stu.setName("jack"); Classes c = new Classes("一班", bean, stu);

c.setNumber(2); //对指定的类使用Annotation

//xstream.processAnnotations(Classes.class); //启用Annotation

//xstream.autodetectAnnotations(true); xstream.alias("student", Student.class);

fail(xstream.toXML(c)); } catch (Exception e) {

e.printStackTrace(); }

}

当启用annotation或是对某个特定的类启用annotation时，上面的classes这个类才有效果。如果不启用annotation，运行后结果如下：

---------annotation Bean --> XML---------

一班

2

1 jack jack@email.com
china
2010-11-22 0 jack Asia/Shanghai

当启用annotation后xstream.processAnnotations(Classes.class)，结果如下：

---------annotation Bean --> XML---------

1 jack jack@email.com
china
2010-11-22 0 jack 1303292242937

4、 Map集合转换xml文档

///

/ function:Java Map集合转XML / @author hoojo

/ @createDate Nov 27, 2010 1:13:26 PM //

@Test public void writeMap2XML() {

try { failRed("---------Map --> XML---------");

Map map = new HashMap(); map.put("No.1", bean);//put

bean = new Student(); bean.setAddress("china");

bean.setEmail("tom@125.com"); bean.setId(2);

bean.setName("tom"); Birthday day = new Birthday("2010-11-22");

bean.setBirthday(day); map.put("No.2", bean);//put

bean = new Student(); bean.setName("jack");

map.put("No.3", bean);//put xstream.alias("student", Student.class);

xstream.alias("key", String.class); xstream.useAttributeFor(Student.class, "id");

xstream.useAttributeFor("birthday", String.class); fail(xstream.toXML(map));

} catch (Exception e) { e.printStackTrace();

} }

运行后结果如下：

---------Map --> XML---------

No.3 jack No.1 jack jack@email.com
china
 No.2 tom tom@125.com
china

5、 用OutStream输出流写XML

///

/ function:用OutStream输出流写XML / @author hoojo

/ @createDate Nov 27, 2010 1:13:48 PM //

@Test public void writeXML4OutStream() {

try { out = xstream.createObjectOutputStream(System.out);

Student stu = new Student(); stu.setName("jack");

Classes c = new Classes("一班", bean, stu); c.setNumber(2);

failRed("---------ObjectOutputStream /# JavaObject--> XML---------"); out.writeObject(stu);

out.writeObject(new Birthday("2010-05-33")); out.write(22);//byte

out.writeBoolean(true); out.writeFloat(22.f);

out.writeUTF("hello"); } catch (Exception e) {

e.printStackTrace(); }

}

使用输出流后，可以通过流对象完成xml的构建，即使没有JavaBean对象，你可以用流来构建一个复杂的xml文档，运行后结果如下：

---------ObjectOutputStream /# JavaObject--> XML---------

0

jack

2010-05-33

22

true

22.0

hello

三、**XML内容转换Java对象**

1、 用InputStream将XML文档转换成java对象 ///

/ function:用InputStream将XML文档转换成java对象 / 需要额外的jar xpp3-main.jar

/ @author hoojo / @createDate Nov 27, 2010 1:14:52 PM

/*/ @Test

public void readXML4InputStream() { try {

String s = "0jack" + "2010-05-33" +

"22true22.0" + "hello";

failRed("---------ObjectInputStream/#/# XML --> javaObject---------"); StringReader reader = new StringReader(s);

in = xstream.createObjectInputStream(reader); Student stu = (Student) in.readObject();

Birthday b = (Birthday) in.readObject(); byte i = in.readByte();

boolean bo = in.readBoolean(); float f = in.readFloat();

String str = in.readUTF(); System.out.println(stu);

System.out.println(b); System.out.println(i);

System.out.println(bo); System.out.println(f);

System.out.println(str); } catch (Exception e) {

e.printStackTrace(); }

}

读取后，转换的Java对象，结果如下：

---------ObjectInputStream/#/# XML --> javaObject---------

jack/#0/#null/#null/#null 2010-05-33

22 true

22.0 hello

2、 将xml文档转换成Java对象

///

/ function:将XML字符串转换成Java对象 / @author hoojo

/ @createDate Nov 27, 2010 2:39:06 PM //

@Test public void readXml2Object() {

try { failRed("-----------Xml >>> Bean--------------");

Student stu = (Student) xstream.fromXML(xstream.toXML(bean)); fail(stu.toString());

List list = new ArrayList(); list.add(bean);//add

Map map = new HashMap(); map.put("No.1", bean);//put

bean = new Student(); bean.setAddress("china");

bean.setEmail("tom@125.com"); bean.setId(2);

bean.setName("tom"); Birthday day = new Birthday("2010-11-22");

bean.setBirthday(day); list.add(bean);//add

map.put("No.2", bean);//put bean = new Student();

bean.setName("jack"); list.add(bean);//add

map.put("No.3", bean);//put failRed("==========XML >>> List===========");

List studetns = (List) xstream.fromXML(xstream.toXML(list)); fail("size:" + studetns.size());//3

for (Student s : studetns) { fail(s.toString());

} failRed("==========XML >>> Map===========");

Map maps = (Map) xstream.fromXML(xstream.toXML(map)); fail("size:" + maps.size());//3

Set key = maps.keySet(); Iterator iter = key.iterator();

while (iter.hasNext()) { String k = iter.next();

fail(k + ":" + map.get(k)); }

} catch (Exception e) { e.printStackTrace();

} }

运行后结果如下：

-----------Xml >>> Bean--------------

jack/#1/#china/#2010-11-22/#jack@email.com ==========XML >>> List===========

size:3 jack/#1/#china/#2010-11-22/#jack@email.com

tom/#2/#china/#2010-11-22/#tom@125.com jack/#0/#null/#null/#null

==========XML >>> Map=========== size:3

No.3:jack/#0/#null/#null/#null No.1:jack/#1/#china/#2010-11-22/#jack@email.com

No.2:tom/#2/#china/#2010-11-22/#tom@125.com

怎么样，成功的完成XML到JavaBean、List、Map的转换，更多对象转换还需要大家一一尝试。用法类似~这里就不一样赘述。

四、**XStream对JSON的支持**

xStream对JSON也有非常好的支持，它提供了2个模型驱动。用这2个驱动可以完成Java对象到JSON的相互转换。使用JettisonMappedXmlDriver驱动，将Java对象转换成json，需要添加jettison.jar

1、 用JettisonMappedXmlDriver完成Java对象到JSON的转换 ///

/ function:XStream结合JettisonMappedXmlDriver驱动，转换Java对象到JSON / 需要添加jettison jar

/ @author hoojo / @createDate Nov 27, 2010 1:23:18 PM

/*/ @Test

public void writeEntity2JETTSON() { failRed("=======JettisonMappedXmlDriver===JavaObject >>>> JaonString=========");

xstream = new XStream(new JettisonMappedXmlDriver()); xstream.setMode(XStream.NO_REFERENCES);

xstream.alias("student", Student.class); fail(xstream.toXML(bean));

}

运行后结果如下：

=======JettisonMappedXmlDriver===JavaObject >>>> JaonString=========

{"student":{"id":1,"name":"jack","email":"jack@email.com","address":"china","birthday":[{},"2010-11-22"]}}

JSON的转换和XML的转换用法一样，只是创建XStream需要传递一个参数，这个参数就是xml到JSON映射转换的驱动。这里会降到两个驱动，分别是JettisonMappedXmlDriver、JsonHierarchicalStreamDriver。

2、 JsonHierarchicalStreamDriver完成Java对象到JSON的转换 ///

/ function:用XStream结合JsonHierarchicalStreamDriver驱动 / 转换java对象为JSON字符串

/ @author hoojo / @createDate Nov 27, 2010 1:16:46 PM

/*/ @Test

public void writeEntiry2JSON() { failRed("======JsonHierarchicalStreamDriver====JavaObject >>>> JaonString=========");

xstream = new XStream(new JsonHierarchicalStreamDriver()); //xstream.setMode(XStream.NO_REFERENCES);

xstream.alias("student", Student.class); failRed("-------Object >>>> JSON---------");

fail(xstream.toXML(bean)); //failRed("========JsonHierarchicalStreamDriver==删除根节点=========");

//删除根节点 xstream = new XStream(new JsonHierarchicalStreamDriver() {

public HierarchicalStreamWriter createWriter(Writer out) { return new JsonWriter(out, JsonWriter.DROP_ROOT_MODE);

} });

//xstream.setMode(XStream.NO_REFERENCES); xstream.alias("student", Student.class);

fail(xstream.toXML(bean)); }

运行后结果如下：

======JsonHierarchicalStreamDriver====JavaObject >>>> JaonString=========

-------Object >>>> JSON--------- {"student": {

"id": 1, "name": "jack",

"email": "jack@email.com", "address": "china",

"birthday": { "birthday": "2010-11-22"

} }}

{ "id": 1,

"name": "jack", "email": "jack@email.com",

"address": "china", "birthday": {

"birthday": "2010-11-22" }

}

使用JsonHierarchicalStreamDriver转换默认会给转换后的对象添加一个根节点，但是在构建JsonHierarchicalStreamDriver驱动的时候，你可以重写createWriter方法，删掉根节点。

看上面的结果，一个是默认带根节点的JSON对象，它只是将类名作为一个属性，将对象作为该属性的一个值。而另一个没有带根属性的JSON就是通过重写createWriter方法完成的。

3、 将List集合转换成JSON字符串 @Test

public void writeList2JSON() { failRed("======JsonHierarchicalStreamDriver====JavaObject >>>> JaonString=========");

JsonHierarchicalStreamDriver driver = new JsonHierarchicalStreamDriver(); xstream = new XStream(driver);

//xstream = new XStream(new JettisonMappedXmlDriver());//转换错误 //xstream.setMode(XStream.NO_REFERENCES);

xstream.alias("student", Student.class); List list = new ArrayList();

list.add(bean);//add bean = new Student();

bean.setAddress("china"); bean.setEmail("tom@125.com");

bean.setId(2); bean.setName("tom");

Birthday day = new Birthday("2010-11-22"); bean.setBirthday(day);

list.add(bean);//add bean = new Student();

bean.setName("jack"); list.add(bean);//add

fail(xstream.toXML(list)); //failRed("========JsonHierarchicalStreamDriver==删除根节点=========");

//删除根节点 xstream = new XStream(new JsonHierarchicalStreamDriver() {

public HierarchicalStreamWriter createWriter(Writer out) { return new JsonWriter(out, JsonWriter.DROP_ROOT_MODE);

} });

xstream.alias("student", Student.class); fail(xstream.toXML(list));

}

运行后结果如下

======JsonHierarchicalStreamDriver====JavaObject >>>> JaonString=========

/#/#{"list": [ {

"id": 1, "name": "jack",

"email": "jack@email.com", "address": "china",

"birthday": { "birthday": "2010-11-22"

} },

{ "id": 2,

"name": "tom", "email": "tom@125.com",

"address": "china", "birthday": {

"birthday": "2010-11-22" }

}, {

"id": 0, "name": "jack"

} ]}

/#[ {

"id": 1, "name": "jack",

"email": "jack@email.com", "address": "china",

"birthday": { "birthday": "2010-11-22"

} },

{ "id": 2,

"name": "tom", "email": "tom@125.com",

"address": "china", "birthday": {

"birthday": "2010-11-22" }

}, {

"id": 0, "name": "jack"

} ]

上面的list1是使用JsonHierarchicalStreamDriver 转换的，当然你也可以使用JettisonMappedXmlDriver驱动进行转换；用JettisonMappedXmlDriver转换后，你会发现格式不同而且没有根属性。

4、 Map转换json @Test

public void writeMap2JSON() { failRed("======JsonHierarchicalStreamDriver==== Map >>>> JaonString=========");

xstream = new XStream(new JsonHierarchicalStreamDriver()); //xstream = new XStream(new JettisonMappedXmlDriver());

xstream.alias("student", Student.class); Map map = new HashMap();

map.put("No.1", bean);//put bean = new Student();

bean.setAddress("china"); bean.setEmail("tom@125.com");

bean.setId(2); bean.setName("tom");

bean.setBirthday(new Birthday("2010-11-21")); map.put("No.2", bean);//put

bean = new Student(); bean.setName("jack");

map.put("No.3", bean);//put fail(xstream.toXML(map));

//failRed("========JsonHierarchicalStreamDriver==删除根节点========="); //删除根节点

xstream = new XStream(new JsonHierarchicalStreamDriver() { public HierarchicalStreamWriter createWriter(Writer out) {

return new JsonWriter(out, JsonWriter.DROP_ROOT_MODE); }

}); xstream.alias("student", Student.class);

fail(xstream.toXML(map)); }

运行后结果如下：

======JsonHierarchicalStreamDriver==== Map >>>> JaonString=========

{"map": [ [

"No.3", {

"id": 0, "name": "jack"

} ],

[ "No.1",

{ "id": 1,

"name": "jack", "email": "jack@email.com",

"address": "china", "birthday": {

"birthday": "2010-11-22" }

} ],

[ "No.2",

{ "id": 2,

"name": "tom", "email": "tom@125.com",

"address": "china", "birthday": {

"birthday": "2010-11-21" }

} ]

]} [

[ "No.3",

{ "id": 0,

"name": "jack" }

], [

"No.1", {

"id": 1, "name": "jack",

"email": "jack@email.com", "address": "china",

"birthday": { "birthday": "2010-11-22"

} }

], [

"No.2", {

"id": 2, "name": "tom",

"email": "tom@125.com", "address": "china",

"birthday": { "birthday": "2010-11-21"

} }

] ]

5、 将JSON转换java对象

///

/ function:JsonHierarchicalStreamDriver可以将简单的json字符串转换成java对象，list、map转换不成功； / JsonHierarchicalStreamDriver读取JSON字符串到java对象出错

/ @author hoojo / @createDate Nov 27, 2010 1:22:26 PM

/ @throws JSONException //

@Test public void readJSON2Object() throws JSONException {

String json = "{\"student\": {" + "\"id\": 1," +

"\"name\": \"haha\"," + "\"email\": \"email\"," +

"\"address\": \"address\"," + "\"birthday\": {" +

"\"birthday\": \"2010-11-22\"" + "}" +

"}}"; //JsonHierarchicalStreamDriver读取JSON字符串到java对象出错，但JettisonMappedXmlDriver可以

xstream = new XStream(new JettisonMappedXmlDriver()); xstream.alias("student", Student.class);

fail(xstream.fromXML(json).toString()); //JettisonMappedXmlDriver转换List集合出错，但JsonHierarchicalStreamDriver可以转换正确

//JettisonMappedXmlDriver 转换的字符串 {"list":{"student":[{"id":1,"name":"haha","email":"email","address":"address","birthday":[{},"2010-11-22"]}]},"student":{"id":2,"name":"tom","email":"tom@125.com","address":"china","birthday":[{},"2010-11-22"]}} json = "{\"list\": [{" +

"\"id\": 1," + "\"name\": \"haha\"," +

"\"email\": \"email\"," + "\"address\": \"address\"," +

"\"birthday\": {" + "\"birthday\": \"2010-11-22\"" +

"}" + "},{" +

"\"id\": 2," + "\"name\": \"tom\"," +

"\"email\": \"tom@125.com\"," + "\"address\": \"china\"," +

"\"birthday\": {" + "\"birthday\": \"2010-11-22\"" +

"}" + "}]}";

System.out.println(json);//用js转换成功 List list = (List) xstream.fromXML(json);

System.out.println(list.size());//0好像转换失败 }

运行后结果如下：

haha/#1/#address/#2010-11-22/#email

{"list": [{"id": 1,"name": "haha","email": "email","address": "address","birthday": {"birthday": "2010-11-22"}}, {"id": 2,"name": "tom","email": "tom@125.com","address": "china","birthday": {"birthday": "2010-11-22"}}]}

0

JSON到Java的转换是fromXML方法。

作者：hoojo

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本文链接: xStream完美转换XML、JSON
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