Simple XML

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 1.java bean Java代码 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 Java代码 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： Xml代码 <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： Java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： Java代码 /** * @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 Java代码 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 + ",bornDate = " + bornDate + " ]"; } //set get ...... } 2.序列化 序列化后生成的simple_testvo.xml文件如下： Xml代码 <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,bornDate = Wed Sep 28 21:47:37 CST 2011 ] [三]、嵌套对象 1.java bean Java代码 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; } } Java代码 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; } } Java代码 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 Java代码 /** * @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： Xml代码 <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 Java代码 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 + ",bornDate = " + bornDate + " ]"; } //省略setter getter方法 } 2.序列化 Java代码 /** * @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： Xml代码 <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,bornDate = null ] [五]、List<Object>处理 1.java bean Java代码 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() + " ] ."; } } Java代码 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 Java代码 /** * @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： Xml代码 <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 Java代码 @ElementList(name = "WifeList",entry = "wife") private List<EntryVo> list; 序列化后生成的XML文件如下： Xml代码 <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> [六]、 inline 参数用法 1.java bean 以上节中得bean为基础修改注解如下： Java代码 @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： Java代码 <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 Java代码 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。 本文就先介绍到这，下次再介绍其他运用事例。