SpringMVC中整合了JSON、XML的视图,可以通过这些视图完成Java对象到XML、JSON的转换。转换XML提供了MarshallingView,开发者只需用注入相应的marshaller、和属性配置,即可自动完成Java的Model对象中的数据到XML的编组。
Email:hoojo_@126.com
Blog: http://blog.csdn.net/IBM_hoojo
一、 准备工作
1、 本次程序会涉及到Jackson、xStream、Jibx、Jaxb2、castor等技术,如果你对这些技术还不是很了解。建议阅读: http://www.cnblogs.com/hoojo/archive/2011/04/27/2030264.html
这篇文章中涉及到的内容应该对你有不少帮助。
2、 jar包下载
spring各版本jar下载地址: http://ebr.springsource.com/repository/app/library/detail?name=org.springframework.spring
相关的依赖包也可以在这里找到: http://ebr.springsource.com/repository/app/library
3、 至少需要以下jar包
4、 当前工程的web.xml配置
<? xml version ="1.0" encoding ="UTF-8" ? >
< web-app version ="2.4"
xmlns ="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation ="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
>
< -- 配置Spring核心控制器 -- >
< servlet >
< servlet-name > dispatcher </ servlet-name >
< servlet-class > org.springframework.web.servlet.DispatcherServlet </ servlet-class >
< init-param >
< param-name > contextConfigLocation </ param-name >
< param-value > /WEB-INF/dispatcher.xml </ param-value >
</ init-param >
< load-on-startup > 1 </ load-on-startup >
</ servlet >
< servlet-mapping >
< servlet-name > dispatcher </ servlet-name >
< url-pattern > *.do </ url-pattern >
</ servlet-mapping >
< -- 解决工程编码过滤器 -- >
< filter >
< filter-name > characterEncodingFilter </ filter-name >
< filter-class > org.springframework.web.filter.CharacterEncodingFilter </ filter-class >
< init-param >
< param-name > encoding </ param-name >
< param-value > UTF-8 </ param-value >
</ init-param >
</ filter >
< filter-mapping >
< filter-name > characterEncodingFilter </ filter-name >
< url-pattern > /* </ url-pattern >
</ filter-mapping >
< welcome-file-list >
< welcome-file > index.jsp </ welcome-file >
</ welcome-file-list >
</ web-app >
5、 WEB-INF中的dispatcher.xml配置
<? xml version ="1.0" encoding ="UTF-8" ? >
< beans xmlns ="http://www.springframework.org/schema/beans"
xmlns:mvc ="http://www.springframework.org/schema/mvc"
xmlns:context ="http://www.springframework.org/schema/context"
xmlns:util ="http://www.springframework.org/schema/util"
xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation ="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-3.0.xsd"
>
< -- 注解探测器 -- >
< context:component-scan base-package ="com.hoo.controller" />
< -- 视图解析器 , 根据视图的名称new ModelAndView ( name ), 在配置文件查找对应的bean配置 -- >
< bean class ="org.springframework.web.servlet.view.BeanNameViewResolver" >
< property name ="order" value ="1" />
</ bean >
< bean class ="org.springframework.web.servlet.view.InternalResourceViewResolver" >
< property name ="viewClass" value ="org.springframework.web.servlet.view.JstlView" />
</ bean >
</ beans >
启动后,可以看到index.jsp 没有出现异常或错误。那么当前SpringMVC的配置就成功了。
二、 利用 Jaxb2 编组 XML
1、 Jaxb2可以完成XML和Java的相互转换,在WebService中用得较多。前面也介绍过Jaxb2 的用法。
在线博文:
For cnblogs: http://www.cnblogs.com/hoojo/archive/2011/04/26/2029011.html
For csdn: http://blog.csdn.net/IBM_hoojo/archive/2011/04/26/6363491.aspx
2、 首先在dispatcher.xml中配置Jaxb2的marshaller的视图,配置如下:
< -- xml视图 , Jaxb2Marshaller , 需要配置对象和对象添加Annotation xml注解 , 不需要添加额外的jar包 -- >
< bean name ="jaxb2MarshallingView" class ="org.springframework.web.servlet.view.xml.MarshallingView" >
< constructor-arg >
< bean class ="org.springframework.oxm.jaxb.Jaxb2Marshaller" >
< property name ="classesToBeBound" >
< array >
< value > com.hoo.entity.User </ value >
< value > com.hoo.entity.AccountBean </ value >
< value > com.hoo.entity.MapBean </ value >
< value > com.hoo.entity.ListBean </ value >
</ array >
</ property >
</ bean >
</ constructor-arg >
</ bean >
Jaxb2的jar在jdk中已经包含,所以不需要添加额外的jar包。详细信息你可以参考1中的博文。上面的jaxb2MarshallingView视图的class是MarshallingView,它有一个构造器需要传递一个Marshaller。Marshaller主要完成编组,即将Java对象转换成XML的这么一个东东。我们在这个构造器中注入了Jaxb2Marshaller这个类,这个bean有一个classesToBeBound属性,这个属性是一个数组。需要将即将转换成XML的Java对象配置在这里。而且这些对象需要进行Annotation注解。
3、 创建Jaxb2MarshallingViewController,完成Java对象到XML的转换
单个JavaBean的转换,代码如下:
package
com.hoo.controller;
import
java.util.ArrayList;
import
java.util.Date;
import
java.util.List;
import
org.springframework.stereotype.Controller;
import
org.springframework.web.bind.annotation.RequestMapping;
import
org.springframework.web.servlet.ModelAndView;
import
com.hoo.entity.AccountBean;
import
com.hoo.entity.Brithday;
import
com.hoo.entity.DifferBean;
import
com.hoo.entity.ListBean;
import
com.hoo.entity.MoreBean;
import
com.hoo.entity.User;
/**
* <b>function:</b>Jaxb2MarshallingView 视图,利用Jaxb2进行Java对象到XML的转换技术
* @author hoojo
* @createDate 2011-4-27 下午03:20:23
* @file Jaxb2MarshallingViewController.java
* @package com.hoo.controller
* @project SpringMVC4View
* @blog http://blog.csdn.net/IBM_hoojo
* @email hoojo_@126.com
* @version 1.0
*/
@Controller
@RequestMapping(
"/jaxb2/view"
)
public class Jaxb2MarshallingViewController {
/*
* MarshallingView Jaxb2Marshaller 需要配置转换成xml的java对象的Annotation
*/
@RequestMapping(
"/doXMLJaxb2"
)
public
ModelAndView doXMLJaxb2View() {
System.out.println(
"#################ViewController doXMLJaxb2View##################"
);
ModelAndView mav = new ModelAndView( "jaxb2MarshallingView" );
AccountBean bean =
new
AccountBean();
bean.setAddress(
"address"
);
bean.setEmail(
"email"
);
bean.setId(1);
bean.setName(
"haha"
);
Brithday day =
new
Brithday();
day.setBrithday(
"2010-11-22"
);
bean.setBrithday(day);
mav.addObject(bean);
return
mav;
}
}
上面的代码的ModelAndView配置了jaxb2MarshallingView这个视图,就表示结果集会通过这个视图进行编组后显示。上面需要转换的AccountBean和Birthday对象,这些对象需要配置annotation, 前面已经讲到annotation对JavaBean转换XML的作用 。我们来看看AccountBean对象代码:
package
com.hoo.entity;
import
javax.xml.bind.annotation.XmlElement;
import
javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement(name =
"account"
)
public class AccountBean {
private int id;
private
String name;
private
String email;
private
String address;
private
Brithday brithday;
@XmlElement
public
Brithday getBrithday() {
return
brithday;
}
public void setBrithday(Brithday brithday) {
this
.brithday = brithday;
}
@XmlElement
public int getId() {
return
id;
}
public void setId( int id) {
this
.id = id;
}
@XmlElement
public
String getName() {
return
name;
}
public void setName(String name) {
this
.name = name;
}
@XmlElement
public
String getEmail() {
return
email;
}
public void setEmail(String email) {
this
.email = email;
}
@XmlElement
public
String getAddress() {
return
address;
}
public void setAddress(String address) {
this
.address = address;
}
@Override
public
String toString() {
return this .name + "#" + this .id + "#" + this .address + "#" + this .brithday + "#" + this .email;
}
}
在getter方法都有部分注解,如果你想了解更多的jaxb2的相关技术,参考: http://www.cnblogs.com/hoojo/archive/2011/04/26/2029011.html
Brithday
package
com.hoo.entity;
public class Brithday {
private
String brithday;
public
Brithday() {}
public
Brithday(String brithday) {
this
.brithday = brithday;
}
public
String getBrithday() {
return
brithday;
}
public void setBrithday(String brithday) {
this
.brithday = brithday;
}
}
Brithday是AccountBean中的一个属性,在AccountBean中已经注解过。这里就不需要进行注解配置。
通过浏览器请求: http://localhost:8080/SpringMVC4View/jaxb2/view/doXMLJaxb2.do
结果如下:
<? xml version ="1.0" encoding ="UTF-8" standalone ="yes" ? >
< account >< address > address </ address >< brithday >< brithday > 2010-11-22 </ brithday ></ brithday >
< email > email </ email >< id > 1 </ id >< name > haha </ name ></ account >
4、 转换带List属性的JavaEntity
/**
* <b>function:</b>转换带有List属性的JavaBean
* @author hoojo
* @createDate 2011-4-27 下午05:32:22
* @return
*/
@RequestMapping(
"/doListXMLJaxb2"
)
public
ModelAndView doListXMLJaxb2View() {
System.out.println(
"#################ViewController doListXMLJaxb2View##################"
);
ModelAndView mav = new ModelAndView( "jaxb2MarshallingView" );
List<Object> beans =
new
ArrayList<Object>();
for ( int i = 0; i < 3; i++) {
AccountBean bean =
new
AccountBean();
bean.setAddress(
"address#"
+ i);
bean.setEmail( "email" + i + "@12" + i + ".com" );
bean.setId(1 + i);
bean.setName(
"haha#"
+ i);
Brithday day =
new
Brithday();
day.setBrithday(
"2010-11-2"
+ i);
bean.setBrithday(day);
beans.add(bean);
User user =
new
User();
user.setAddress(
"china GuangZhou# "
+ i);
user.setAge(23 + i);
user.setBrithday(
new
Date());
user.setName(
"jack#"
+ i);
user.setSex(Boolean.parseBoolean(i +
""
));
beans.add(user);
}
ListBean list =
new
ListBean();
list.setList(beans);
mav.addObject(list);
return
mav;
}
ListBean注解过的代码
package
com.hoo.entity;
import
java.util.List;
import
javax.xml.bind.annotation.XmlElement;
import
javax.xml.bind.annotation.XmlElements;
import
javax.xml.bind.annotation.XmlRootElement;
@SuppressWarnings(
"unchecked"
)
@XmlRootElement
public class ListBean {
private
String name;
private
List list;
@XmlElements({
@XmlElement(name = "user" , type = User. class ),
@XmlElement(name = "account" , type = AccountBean. class ),
})
public
List getList() {
return
list;
}
public void setList(List list) {
this
.list = list;
}
public
String getName() {
return
name;
}
public void setName(String name) {
this
.name = name;
}
}
通过上面的注解可以看出List中只能存储User、AccountBean对象,关于User对象的代码和AccountBean对象的是一样的,只是类名不同而已。读者可以自己添加。在WebBrowser中请求: http://localhost:8080/SpringMVC4View/jaxb2/view/doListXMLJaxb2.do
结果如下:
<? xml version ="1.0" encoding ="UTF-8" standalone ="yes" ? >
< listBean >
< account >< address > address#0 </ address >< brithday >< brithday > 2010-11-20 </ brithday ></ brithday >
< email > email0@120.com </ email >< id > 1 </ id >< name > haha#0 </ name ></ account >
< user >< address > china GuangZhou# 0 </ address >< age > 23 </ age >
< brithday > 2011-04-27T17:02:38.028+08:00 </ brithday >< name > jack#0 </ name >< sex > false </ sex ></ user >
< account >< address > address#1 </ address >< brithday >< brithday > 2010-11-21 </ brithday ></ brithday >
< email > email1@121.com </ email >< id > 2 </ id >< name > haha#1 </ name ></ account >
< user >< address > china GuangZhou# 1 </ address >< age > 24 </ age >
< brithday > 2011-04-27T17:02:38.028+08:00 </ brithday >< name > jack#1 </ name >< sex > false </ sex ></ user >
< account >< address > address#2 </ address >< brithday >< brithday > 2010-11-22 </ brithday ></ brithday >
< email > email2@122.com </ email >< id > 3 </ id >< name > haha#2 </ name ></ account >
< user >< address > china GuangZhou# 2 </ address >< age > 25 </ age >
< brithday > 2011-04-27T17:02:38.028+08:00 </ brithday >< name > jack#2 </ name >< sex > false </ sex ></ user >
</ listBean >
5、 转换带有Map属性的JavaBean,Jaxb2转换Map有点复杂,先看看代码:
/**
* <b>function:</b>转换带有Map属性的JavaBean
* @author hoojo
* @createDate 2011-4-27 下午05:32:42
* @return
*/
@RequestMapping(
"/doMapXMLJaxb2"
)
public
ModelAndView doMapXMLJaxb2View() {
System.out.println(
"#################ViewController doMapXMLJaxb2View##################"
);
ModelAndView mav = new ModelAndView( "jaxb2MarshallingView" );
MapBean mapBean =
new
MapBean();
HashMap<String, AccountBean> map =
new
HashMap<String, AccountBean>();
AccountBean bean =
new
AccountBean();
bean.setAddress(
"北京"
);
bean.setEmail(
"email"
);
bean.setId(1);
bean.setName(
"jack"
);
Brithday day =
new
Brithday();
day.setBrithday(
"2010-11-22"
);
bean.setBrithday(day);
map.put(
"NO1"
, bean);
bean =
new
AccountBean();
bean.setAddress(
"china"
);
bean.setEmail(
"tom@125.com"
);
bean.setId(2);
bean.setName(
"tom"
);
day = new Brithday( "2011-11-22" );
bean.setBrithday(day);
map.put(
"NO2"
, bean);
mapBean.setMap(map);
mav.addObject(mapBean);
return
mav;
}
首先看看MapBean的代码,代码很简单就一个Map的属性。
package
com.hoo.entity;
import
java.util.HashMap;
import
javax.xml.bind.annotation.XmlRootElement;
import
javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import
com.hoo.util.MapAdapter;
@XmlRootElement
public class MapBean {
private
HashMap<String, AccountBean> map;
@XmlJavaTypeAdapter(MapAdapter.
class
)
public
HashMap<String, AccountBean> getMap() {
return
map;
}
public void setMap(HashMap<String, AccountBean> map) {
this
.map = map;
}
}
上面的代码的getMap方法设置了XmlJavaTypeAdapter这个注解,注解里面的MapAdapter是我们自己实现的,而且还要构建一个MapElements数组元素。主要是继承XmlAdapter重写里面的几个方法完成的。
MapAdapter代码
package
com.hoo.util;
import
java.util.HashMap;
import
java.util.Map;
import
javax.xml.bind.annotation.adapters.XmlAdapter;
import
com.hoo.entity.AccountBean;
/**
* <b>function:</b>AccountBean 编组、解组的XmlAdapter
* @author hoojo
* @createDate 2011-4-25 下午05:03:18
* @file MyAdetper.java
* @package com.hoo.util
* @project WebHttpUtils
* @blog http://blog.csdn.net/IBM_hoojo
* @email hoojo_@126.com
* @version 1.0
*/
public class MapAdapter extends XmlAdapter<MapElements[], Map<String, AccountBean>> {
public MapElements[] marshal(Map<String, AccountBean> arg0) throws Exception {
MapElements[] mapElements =
new
MapElements[arg0.size()];
int
i = 0;
for
(Map.Entry<String, AccountBean> entry : arg0.entrySet())
mapElements[i++] =
new
MapElements(entry.getKey(), entry.getValue());
return
mapElements;
}
public Map<String, AccountBean> unmarshal(MapElements[] arg0) throws Exception {
Map<String, AccountBean> r =
new
HashMap<String, AccountBean>();
for
(MapElements mapelement : arg0)
r.put(mapelement.key, mapelement.value);
return
r;
}
}
MapElements代码
package
com.hoo.util;
import
javax.xml.bind.annotation.XmlElement;
import
com.hoo.entity.AccountBean;
/**
* <b>function:</b> MapElements
* @author hoojo
* @createDate 2011-4-25 下午05:04:04
* @file MyElements.java
* @package com.hoo.util
* @project WebHttpUtils
* @blog http://blog.csdn.net/IBM_hoojo
* @email hoojo_@126.com
* @version 1.0
*/
public class MapElements {
@XmlElement
public
String key;
@XmlElement
public
AccountBean value;
@SuppressWarnings(
"unused"
)
private
MapElements() {
}
// Required by JAXB
public
MapElements(String key, AccountBean value) {
this
.key = key;
this
.value = value;
}
}
在浏览器中请求: http://localhost:8080/SpringMVC4View/jaxb2/view/doMapXMLJaxb2.do
结果如下:
<? xml version ="1.0" encoding ="UTF-8" standalone ="yes" ? >
< mapBean >< map >< item >< key > NO2 </ key >< value >< address > china </ address >
< brithday >< brithday > 2011-11-22 </ brithday ></ brithday >
< email > tom@125.com </ email >< id > 2 </ id >< name > tom </ name ></ value ></ item >
< item >< key > NO1 </ key >< value >< address > 北京 </ address >< brithday >< brithday > 2010-11-22 </ brithday ></ brithday >
< email > email </ email >< id > 1 </ id >< name > jack </ name ></ value ></ item ></ map >
</ mapBean >
总结,如果你想将一些Java的基本类型转换成XML。那么你得创建一个带getter、setter方法的JavaBean。然后在Bean的getter方法进行相应的Annotation注解即可完成转换。
三、 利用 xStream 转换 XML
1、 xStream可以轻易的将Java对象转换成XML、JSON,Spring整合利用xStream转换xml。需要添加xStream相关的xstream-1.3.1.jar包。 如果你对xStream不上很了解,你可以先阅读这篇文章:
For csblogs: http://www.cnblogs.com/hoojo/archive/2011/04/22/2025197.html
For csdn: http://blog.csdn.net/IBM_hoojo/archive/2011/04/22/6342386.aspx
2、 然后在dispatcher.xml中添加如下配置
< -- xml视图 , XStreamMarshaller , 可以转换任何形式的java对象 , 需要添加xStream jar包 -- >
< bean name ="xStreamMarshallingView" class ="org.springframework.web.servlet.view.xml.MarshallingView" >
< property name ="marshaller" >
< bean class ="org.springframework.oxm.xstream.XStreamMarshaller" >
< -- 启用annotation -- >
< property name ="autodetectAnnotations" value ="true" />
< -- 类名别名 -- >
< property name ="aliases" >
< map >
< -- Account这个类的别名就变成了myBeans , 那么转换后的xml中就是myBeans -- >
< entry key ="myBeans" value ="com.hoo.entity.Account" />
</ map >
</ property >
< -- 基本属性别名 -- >
< property name ="fieldAliases" >
< map >
< -- Account中的brithday这个属性 -- >
< entry key ="com.hoo.entity.Account.brithday" value ="生日" />
</ map >
</ property >
</ bean >
</ property >
</ bean >
上次配置的参数有注释描述,还要没有配置的参数。如:annotatedClass、annotatedClasses是当没有配置启用annotation的时候,可以用这2个属性进行配置你指定的class启用annotation注解。streamDriver是配置驱动用的,默认可以不要驱动,你可以配置DomDriver、JSON相关的驱动。encoding是设置编码,关于XStreamMarshaller还要更多的参数配置和上面xStream 的博文中讲解的一样使用,只是通过配置,而博文中是直接在代码中写的。当然也可以通过annotation进行注解哦;如果你想了解更多xStream的用法,请你仔细阅读: http://www.cnblogs.com/hoojo/archive/2011/04/22/2025197.html
3、 普通JavaBean转换XML
package
com.hoo.controller;
import
java.util.ArrayList;
import
java.util.Date;
import
java.util.HashMap;
import
java.util.List;
import
java.util.Map;
import
org.springframework.stereotype.Controller;
import
org.springframework.web.bind.annotation.RequestMapping;
import
org.springframework.web.servlet.ModelAndView;
import
com.hoo.entity.Account;
import
com.hoo.entity.AccountArray;
import
com.hoo.entity.AccountBean;
import
com.hoo.entity.Brithday;
import
com.hoo.entity.DifferBean;
import
com.hoo.entity.ListBean;
import
com.hoo.entity.MapBean;
import
com.hoo.entity.MoreBean;
import
com.hoo.entity.User;
/**
* <b>function:</b>Jaxb2MarshallingView 视图,利用Jaxb2进行Java对象到XML的转换技术
* @author hoojo
* @createDate 2011-4-27 下午03:20:23
* @file Jaxb2MarshallingViewController.java
* @package com.hoo.controller
* @project SpringMVC4View
* @blog http://blog.csdn.net/IBM_hoojo
* @email hoojo_@126.com
* @version 1.0
*/
@Controller
@RequestMapping(
"/jaxb2/view"
)
public class Jaxb2MarshallingViewController {
/*
* MarshallingView Jaxb2Marshaller 需要配置转换成xml的java对象的Annotation
*/
@RequestMapping(
"/doXMLJaxb2"
)
public
ModelAndView doXMLJaxb2View() {
System.out.println(
"#################ViewController doXMLJaxb2View##################"
);
ModelAndView mav = new ModelAndView( "jaxb2MarshallingView" );
AccountBean bean =
new
AccountBean();
bean.setAddress(
"address"
);
bean.setEmail(
"email"
);
bean.setId(1);
bean.setName(
"haha"
);
Brithday day =
new
Brithday();
day.setBrithday(
"2010-11-22"
);
bean.setBrithday(day);
mav.addObject(bean);
return
mav;
}
}
AccountBean上面的代码已经给出,这里就不重复了。值得说明的是xStream在ModelAndView中,直接用addObject方法添加时,有时候出现一些不是我们转换的对象的信息,一般是BindingResult的xml信息。解决办法就是设置addObject的key。Key设置为BindingResult. MODEL_KEY_PREFIX 这样就可以了,代码上面已经给出。
在浏览器中请求: http://localhost:8080/SpringMVC4View/xStream/view/doXMLXStream.do
结果如下:
< com.hoo.entity.AccountBean >< id > 1 </ id >< name > haha </ name >< email > email </ email >< address > 北京 </ address >
< brithday >< brithday > 2010-11-22 </ brithday ></ brithday ></ com.hoo.entity.AccountBean >
4、 转换对象数组
代码如下:
/**
* <b>function:</b>转换对象数组
* @author hoojo
* @createDate 2011-4-27 下午06:19:40
* @return
*/
@RequestMapping(
"/doMoreXMLXStream"
)
public
ModelAndView doMoreXMLXStreamView() {
System.out.println(
"#################ViewController doMoreXMLXStreamView##################"
);
ModelAndView mav = new ModelAndView( "xStreamMarshallingView" );
Account[] accs =
new
Account[2];
Account bean =
new
Account();
bean.setAddress(
"北京"
);
bean.setEmail(
"email"
);
bean.setId(1);
bean.setName(
"haha"
);
Brithday day =
new
Brithday();
day.setBrithday(
"2010-11-22"
);
bean.setBrithday(day);
accs[0] = bean;
bean =
new
Account();
bean.setAddress(
"上海"
);
bean.setEmail(
"email"
);
bean.setId(1);
bean.setName(
"haha"
);
day =
new
Brithday();
day.setBrithday(
"2010-11-22"
);
bean.setBrithday(day);
accs[1] = bean;
mav.addObject(accs);
return
mav;
}
在WebBrowser中请求 http://localhost:8080/SpringMVC4View/xStream/view/doMoreXMLXStream.do
结果如下:
<myBeans-array><myBeans><id>1</id><name>haha</name><email>email</email>
<address>北京</address><生日><brithday>2010-11-22</brithday></生日></myBeans>
<myBeans><id>1</id><name>haha</name><email>email</email><address>上海</address>
<生日><brithday>2010-11-22</brithday></生日></myBeans></myBeans-array>
结果中的myBeans、生日就是在dispatcher配置文件中重命名的对象属性名称。
5、 转换Map集合
/**
* <b>function:</b>转换Map对象
* @author hoojo
* @createDate 2011-4-27 下午06:19:48
* @return
*/
@RequestMapping(
"/doDifferXMLXStream"
)
public
ModelAndView doDifferXMLXStreamView() {
System.out.println(
"#################ViewController doDifferXMLXStreamView##################"
);
ModelAndView mav = new ModelAndView( "xStreamMarshallingView" );
Account bean =
new
Account();
bean.setAddress(
"广东"
);
bean.setEmail(
"email"
);
bean.setId(1);
bean.setName(
"haha"
);
Brithday day =
new
Brithday();
day.setBrithday(
"2010-11-22"
);
bean.setBrithday(day);
User user =
new
User();
user.setAddress(
"china GuangZhou"
);
user.setAge(23);
user.setBrithday(
new
Date());
user.setName(
"jack"
);
user.setSex(true);
Map<String, Object> map =
new
HashMap<String, Object>();
map.put(
"bean"
, bean);
map.put(
"user"
, user);
mav.addObject(map);
return
mav;
}
在WebBrowser中请求 http://localhost:8080/SpringMVC4View/xStream/view/doDifferXMLXStream.do
结果如下:
< map >< entry >
< string > bean </ string >< myBeans >< id > 1 </ id >< name > haha </ name >< email > email </ email >
< address > 广东 </ address >< 生日 >< brithday > 2010-11-22 </ brithday ></ 生日 ></ myBeans >
</ entry >< entry >< string > user </ string >< com.hoo.entity.User >< name > jack </ name >< age > 23 </ age >< sex > true </ sex >
< address > china GuangZhou </ address >< brithday > 2011-04-27 19:02:13.747 CST </ brithday ></ com.hoo.entity.User >
</ entry ></ map >
6、 转换List集合
/**
* <b>function:</b>转换List对象
* @author hoojo
* @createDate 2011-4-27 下午06:20:02
* @return
*/
@RequestMapping(
"/doListXMLXStream"
)
public
ModelAndView doListXMLXStreamView() {
System.out.println(
"#################ViewController doListXMLXStreamView##################"
);
ModelAndView mav = new ModelAndView( "xStreamMarshallingView" );
List<Object> beans =
new
ArrayList<Object>();
for ( int i = 0; i < 3; i++) {
Account bean =
new
Account();
bean.setAddress(
"北京#"
+ i);
bean.setEmail( "email" + i + "@12" + i + ".com" );
bean.setId(1 + i);
bean.setName(
"haha#"
+ i);
Brithday day =
new
Brithday();
day.setBrithday(
"2010-11-2"
+ i);
bean.setBrithday(day);
beans.add(bean);
User user =
new
User();
user.setAddress(
"china GuangZhou 广州# "
+ i);
user.setAge(23 + i);
user.setBrithday(
new
Date());
user.setName(
"jack#"
+ i);
user.setSex(Boolean.parseBoolean(i +
""
));
beans.add(user);
}
mav.addObject(beans);
return
mav;
}
在WebBrowser中请求 http://localhost:8080/SpringMVC4View/xStream/view/doListXMLXStream.do
结果如下:
< list >
< myBeans >< id > 1 </ id >< name > haha#0 </ name >< email > email0@120.com </ email >< address > 北京#0 </ address >< 生日 >
< brithday > 2010-11-20 </ brithday ></ 生日 ></ myBeans >
< com.hoo.entity.User >< name > jack#0 </ name >< age > 23 </ age >< sex > false </ sex >< address > china GuangZhou 广州# 0 </ address >
< brithday > 2011-04-27 19:08:40.106 CST </ brithday ></ com.hoo.entity.User >
< myBeans >< id > 2 </ id >< name > haha#1 </ name >< email > email1@121.com </ email >< address > 北京#1 </ address >< 生日 >
< brithday > 2010-11-21 </ brithday ></ 生日 ></ myBeans >
< com.hoo.entity.User >< name > jack#1 </ name >< age > 24 </ age >< sex > false </ sex >< address > china GuangZhou 广州# 1 </ address >
< brithday > 2011-04-27 19:08:40.106 CST </ brithday ></ com.hoo.entity.User >
< myBeans >< id > 3 </ id >< name > haha#2 </ name >< email > email2@122.com </ email >< address > 北京#2 </ address >< 生日 >
< brithday > 2010-11-22 </ brithday ></ 生日 ></ myBeans >
< com.hoo.entity.User >< name > jack#2 </ name >< age > 25 </ age >< sex > false </ sex >< address > china GuangZhou 广州# 2 </ address >
< brithday > 2011-04-27 19:08:40.106 CST </ brithday ></ com.hoo.entity.User ></ list >
总结,xStream相对jaxb2要简单些。而且相对比较灵活,可以轻易的转换Java普通类型。
下次会介绍castor转换XML、jibx转换XML、Jackson转换JSON 以及自定义Jsonlib视图转换Json。