Simple XML

官网：http://simple.sourceforge.net/home.php

截止目前最新版本：simple-xml-2.7.1.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<Object>处理

  • [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：


<myTestVo wife="小小" realName="大大">

   <userName>michael</userName>

   <bornDate>2011-09-28 17:39:59.432 CST</bornDate>

   <height>173.3</height>

</myTestVo>

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：


<MyTest MyWife="小小" realName="大大">

   <userName>michael</userName>

   <born>2011-09-28 21:47:37.455 CST</born>

   <height>173.3</height>

</MyTest>

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：


<configurationVo id="10000">

   <server port="8088">

      <host>sjsky.iteye.com</host>

      <security ssl="true">

         <keyStore>Michael</keyStore>

      </security>

   </server>

</configurationVo>

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：


<myTestVo realName="大大">

   <userName>michael</userName>

   <height>173.3</height>

</myTestVo>

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<Object>处理

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<EntryVo> list;


@Attribute

    private String name;


public List<EntryVo> getList() {

        return list;

    }


public String getName() {

        return name;

    }


public void setList(List<EntryVo> 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<EntryVo> subList = new ArrayList<EntryVo>();

        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：


<propertyList name="Wife List">

   <list class="java.util.ArrayList">

      <entryVo name="A">

         <value>福晋</value>

      </entryVo>

      <entryVo name="B">

         <value>侧福晋</value>

      </entryVo>

      <entryVo name="C">

         <value>小三</value>

      </entryVo>

      <entryVo name="D">

         <value>二奶</value>

      </entryVo>

   </list>

</propertyList>

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<EntryVo> list;

序列化后生成的XML文件如下：


<propertyList name="Wife List">

   <WifeList class="java.util.ArrayList">

      <wife name="A">

         <value>福晋</value>

      </wife>

      <wife name="B">

         <value>侧福晋</value>

      </wife>

      <wife name="C">

         <value>小三</value>

      </wife>

      <wife name="D">

         <value>二奶</value>

      </wife>

   </WifeList>

</propertyList>

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<EntryVo> list;


@Attribute

    private String name;


public List<EntryVo> getList() {

        return list;

    }


public String getName() {

        return name;

    }


public void setList(List<EntryVo> 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：


<propertyList name="Wife List">

   <wife name="A">

      <value>福晋</value>

   </wife>

   <wife name="B">

      <value>侧福晋</value>

   </wife>

   <wife name="C">

      <value>小三</value>

   </wife>

   <wife name="D">

      <value>二奶</value>

   </wife>

</propertyList>

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：


<entryVo name="blog">

<value>http://sjsky.iteye.com</value>

</entryVo>

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。

本文转自：http://sjsky.iteye.com/blog/1182057

时间： 2024-08-26 04:30:56

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