blog迁移至 :http://www.micmiu.com
之前曾写过一blog ： XStream序列化JAVA对象为XML以及反序列化 （http://sjsky.iteye.com/blog/784434），今天介绍另一个Java Bean<->XML 之间序列化和反序列化的轻量级工具：Simple
官网：http://simple.sourceforge.net/home.php
截止目前最新版本（附近可下载）：simple-xml-2.6.1.jar
特点：
- jar lib文件只有360K左右的大小
- 它的使用不需要依赖于其他 JAR 文件
- 通过注解的方式，灵活方便
下面将分节详细介绍Simple的特点和使用方法：
- [一]、简单bean的序列化和反序列化
- [二]、自定义节点名称
- [三]、嵌套对象
- [四]、可选的非强制性的元素或属性
- [五]、List
- [六]、inline 参数用法
- [七]、构造函数的注解处理
[一]、简单bean的序列化和反序列化
1.java bean
package michael.serialization.simplexml;
import java.util.Date;
import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;
/**
*
* @blog http://sjsky.iteye.com
* @author Michael
*/
@Root
public class MyTestVo {
@Element
private String userName;
@Attribute
private String wife;
@Attribute
private String realName;
@Element
private Date bornDate;
@Element
private Double height;
public String toString() {
return "MyTestVo : [ userName = " + userName + " , wife = " + wife
+ " , realName = " + realName + " , height = " + height
+ " , bornDate = " + bornDate + " ]";
}
//省略set get等方法
......
}
2.序列化
public static void main(String[] args) throws Exception {
String xmlpath = "d:/test/michael/simple_testvo.xml";
MyTestVo vo = new MyTestVo();
vo.setUserName("michael");
vo.setRealName("大大");
vo.setWife("小小");
vo.setHeight(173.3d);
vo.setBornDate(new Date());
try {
Serializer serializer = new Persister();
File result = new File(xmlpath);
serializer.write(vo, result);
} catch (Exception e) {
e.printStackTrace();
}
}
序列化成功生成的simple_testvo.xml文件如下：
michael 2011-09-28 17:39:59.432 CST 173.3
ps: 注解可以把Java的属性序列化时指定为属性或者节点元素
3.反序列化
把上述生成的XML文件反序列化成Java bean测试代码：
public static void main(String[] args) throws Exception {
String xmlpath = "d:/test/michael/simple_testvo.xml";
Serializer serializer = new Persister();
File source = new File(xmlpath);
try {
MyTestVo vo = serializer.read(MyTestVo.class, source);
System.out.println(vo);
} catch (Exception e) {
e.printStackTrace();
}
}
如果XML中包括中文字符有可能反序列化时会报错，以utf-8的编码读取XML文件即可，故修改代码如下：
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
String xmlpath = "d:/test/michael/simple_testvo.xml";
Serializer serializer = new Persister();
try {
InputStreamReader is = new InputStreamReader(new FileInputStream(
xmlpath), "utf-8");
PropertyList parseVo = serializer.read(PropertyList.class, is);
System.out.println(parseVo);
} catch (Exception e) {
e.printStackTrace();
}
}
运行反序列化，打印Java bean信息如下：
MyTestVo : [ userName = michael , wife = 小小小 , realName = 大大 , height = 173.3 , bornDate = Wed Sep 28 17:39:59 CST 2011 ]
[二]、自定义节点名称
1.java bean
package michael.serialization.simplexml;
import java.util.Date;
import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;
/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
@Root(name = "MyTest")
public class MyTestVo {
@Element
private String userName;
@Attribute(name = "MyWife")
private String wife;
@Attribute
private String realName;
@Element(name = "born")
private Date bornDate;
@Element
private Double height;
@Override
public String toString() {
return "MyTestVo : [ userName = " + userName + " , wife = " + wife
+ " , realName = " + realName + " , height = " + height
+ " , bornDate = " + bornDate + " ]";
}
//set get ......
}
2.序列化
序列化后生成的simple_testvo.xml文件如下：
michael 2011-09-28 21:47:37.455 CST 173.3
可以和之前的序列化XML文件对比下，看看区别在哪里。
3.反序列化
运行反序列化程序后的打印结果如下：
MyTestVo : [ userName = michael , wife = 小小 , realName = 大大 , height = 173.3 , bornDate = Wed Sep 28 21:47:37 CST 2011 ]
[三]、嵌套对象
1.java bean
package michael.serialization.simplexml;
import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;
/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
@Root
public class ConfigurationVo {
@Element
private ServerVo server;
@Attribute
private int id;
public ServerVo getServer() {
return server;
}
public int getId() {
return id;
}
public void setServer(ServerVo pServer) {
server = pServer;
}
public void setId(int pId) {
id = pId;
}
}
package michael.serialization.simplexml;
import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;
/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
@Root
public class ServerVo {
@Attribute
private int port;
@Element
private String host;
@Element
private SecurityVo security;
public int getPort() {
return port;
}
public String getHost() {
return host;
}
public SecurityVo getSecurity() {
return security;
}
public void setPort(int pPort) {
port = pPort;
}
public void setHost(String pHost) {
host = pHost;
}
public void setSecurity(SecurityVo pSecurity) {
security = pSecurity;
}
}
package michael.serialization.simplexml;
import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;
/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
@Root
public class SecurityVo {
@Attribute
private boolean ssl;
@Element
private String keyStore;
public boolean isSsl() {
return ssl;
}
public String getKeyStore() {
return keyStore;
}
public void setSsl(boolean pSsl) {
ssl = pSsl;
}
public void setKeyStore(String pKeyStore) {
keyStore = pKeyStore;
}
}
2.序列化
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
String xmlpath = "d:/test/michael/simple_testvo.xml";
SecurityVo security = new SecurityVo();
security.setSsl(true);
security.setKeyStore("Michael");
ServerVo server = new ServerVo();
server.setHost("sjsky.iteye.com");
server.setPort(8088);
server.setSecurity(security);
ConfigurationVo config = new ConfigurationVo();
config.setId(10000);
config.setServer(server);
Serializer serializer = new Persister();
try {
File xmlFile = new File(xmlpath);
serializer.write(config, xmlFile);
} catch (Exception e) {
e.printStackTrace();
}
}
运行上述方法，序列化生成的XML文件如下：
sjsky.iteye.com Michael
3.反序列化的方法和之前的一致，自己 可以 测试下结果是否正确。
[四]、可选的非强制性的元素或属性
1.java bean
package michael.serialization.simplexml;
import java.util.Date;
import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;
/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
@Root
public class MyTestVo {
@Element
private String userName;
// 不是每个人都有妻子的 吼吼
@Attribute(required = false)
private String wife;
@Attribute
private String realName;
// 不想泄露年龄噢
@Element(required = false)
private Date bornDate;
@Element
private Double height;
@Override
public String toString() {
return "MyTestVo : [ userName = " + userName + " , wife = " + wife
+ " , realName = " + realName + " , height = " + height
+ " , bornDate = " + bornDate + " ]";
}
//省略setter getter方法
}
2.序列化
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
String xmlpath = "d:/test/michael/simple_testvo.xml";
MyTestVo vo = new MyTestVo();
vo.setUserName("michael");
vo.setRealName("大大");
vo.setHeight(173.3d);
Serializer serializer = new Persister();
try {
File xmlFile = new File(xmlpath);
serializer.write(vo, xmlFile);
} catch (Exception e) {
e.printStackTrace();
}
}
运行序列化程序后生成的XML文件如下：
michael 173.3
3.反序列化
运行反序列化程序后打印结果如下：
MyTestVo : [ userName = michael , wife = null , realName = 大大 , height = 173.3 , bornDate = null ]
[五]、List
1.java bean
package michael.serialization.simplexml;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.ElementList;
import org.simpleframework.xml.Root;
import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;
/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
@Root
public class PropertyList {
@ElementList
private List list;
@Attribute
private String name;
public List getList() {
return list;
}
public String getName() {
return name;
}
public void setList(List pList) {
list = pList;
}
public void setName(String pName) {
name = pName;
}
@Override
public String toString() {
return "PropertyList : [ name = " + name + " , EntryVo list size = "
+ list.size() + " ] .";
}
}
package michael.serialization.simplexml;
import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;
/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
@Root
public class EntryVo {
@Attribute
private String name;
@Element
private String value;
public String getName() {
return name;
}
public String getValue() {
return value;
}
public void setName(String pName) {
name = pName;
}
public void setValue(String pValue) {
value = pValue;
}
}
2.序列化
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
String xmlpath = "d:/test/michael/simple_testvo.xml";
Serializer serializer = new Persister();
try {
PropertyList vo = initBean();
serializer.write(vo, new File(xmlpath));
} catch (Exception e) {
e.printStackTrace();
}
}
private static PropertyList initBean() {
PropertyList vo = new PropertyList();
vo.setName("Wife List");
List subList = new ArrayList();
EntryVo subvo = new EntryVo();
subvo.setName("A");
subvo.setValue("福晋");
subList.add(subvo);
subvo = new EntryVo();
subvo.setName("B");
subvo.setValue("侧福晋");
subList.add(subvo);
subvo = new EntryVo();
subvo.setName("C");
subvo.setValue("小三");
subList.add(subvo);
subvo = new EntryVo();
subvo.setName("D");
subvo.setValue("二奶");
subList.add(subvo);
vo.setList(subList);
return vo;
}
运行序列化程序后生成的XML文件如下：
福晋 侧福晋 小三 二奶
3.反序列化，运行结果打印对象信息如下：
PropertyList : [ name = Wife List , EntryVo list size = 4 ] .
4.修改注解@ElementList的参数
@ElementList(name = "WifeList", entry = "wife")
private List list;
序列化后生成的XML文件如下：
福晋 侧福晋 小三 二奶
注意XML文件的变化。
[六]、 inline 参数用法
1.java bean
以上节中得bean为基础修改注解如下：
@Root
public class PropertyList {
@ElementList(name = "WifeList", entry = "wife", inline = true)
private List list;
@Attribute
private String name;
public List getList() {
return list;
}
public String getName() {
return name;
}
public void setList(List pList) {
list = pList;
}
public void setName(String pName) {
name = pName;
}
@Override
public String toString() {
return "PropertyList : [ name = " + name + " , EntryVo list size = "
+ list.size() + " ] .";
}
}
2.序列化后生成的XML文件如下：
福晋 侧福晋 小三 二奶
和上节生成的文件相比，XML结构少了一个层次。
[七]、构造函数的注解处理
1.java bean
package michael.serialization.simplexml;
import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;
import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;
/**
* @blog http://sjsky.iteye.com
* @author Michael
*/
@Root
public class EntryVo {
public EntryVo(@Attribute(name = "name")
String name, @Element(name = "value")
String value) {
this.name = name;
this.value = value;
}
@Attribute(name = "name")
private String name;
@Element(name = "value")
private String value;
public String getName() {
return name;
}
public String getValue() {
return value;
}
public void setName(String pName) {
name = pName;
}
public void setValue(String pValue) {
value = pValue;
}
@Override
public String toString() {
return "EntryVo : [ name = " + name + ", value = " + value + " ].";
}
}
2.序列化
生成的XML文件如下：
3.反序列化
反序列化生成的bean的信息打印如下：
EntryVo : [ name = blog, value = http://sjsky.iteye.com ].
ps：如果java bean有参数的构函数，需要在构造函数的参数前也加上相应的注解，否则在反序列化时会出错。
本文就先介绍到这，下次再介绍其他运用事例。
本文连接：http://sjsky.iteye.com/blog/1182057
转载请注明来自：Michael's blog @ http://sjsky.iteye.com
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