JAXB使用CDATA编组解组
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我正在尝试与JAXB进行编组。
我的输出就像
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root>
<name><![CDATA[<h1>kshitij</h1>]]></name>
<surname><h1>solanki</h1></surname>
<id><h1>1</h1></id>
</root>
但我需要输出像
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root>
<name><![CDATA[<h1>kshitij</h1>]]></name>
<surname><![CDATA[<h1>solanki</h1>]]></surname>
<id><![CDATA[0]]></id>
</root>
我正在使用以下代码来执行此操作。如果我取消注释代码我得到Property Binding Exception。没有它我可以编译,但我没有得到确切的所需输出。
package com.ksh.templates;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import com.sun.xml.bind.marshaller.CharacterEscapeHandler;
public class MainCDATA {
public static void main(String args[])
{
try
{
String name = "<h1>kshitij</h1>";
String surname = "<h1>solanki</h1>";
String id = "<h1>1</h1>";
TestingCDATA cdata = new TestingCDATA();
cdata.setId(id);
cdata.setName(name);
cdata.setSurname(surname);
JAXBContext jaxbContext = JAXBContext.newInstance(TestingCDATA.class);
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.setProperty(CharacterEscapeHandler.class.getName(), new CharacterEscapeHandler() {
public void escape(char[] ac, int i, int j, boolean flag,
Writer writer) throws IOException {
writer.write( ac, i, j ); }
});
StringWriter stringWriter = new StringWriter();
marshaller.marshal(cdata, stringWriter);
System.out.println(stringWriter.toString());
}
catch (Exception e)
{
System.out.println(e);
}
}
}
我的豆子看起来像
package com.ksh.templates;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import com.sun.xml.txw2.annotation.XmlCDATA;
@XmlRootElement(name = "root")
@XmlAccessorType(XmlAccessType.FIELD)
public class TestingCDATA {
@XmlElement
@XmlJavaTypeAdapter(value = AdaptorCDATA.class)
private String name;
@XmlElement
@XmlJavaTypeAdapter(value = AdaptorCDATA.class)
private String surname;
@XmlCDATA
public String getName() {
return name;
}
@XmlCDATA
public void setName(String name) {
this.name = name;
}
@XmlCDATA
public String getSurname() {
return surname;
}
@XmlCDATA
public void setSurname(String surname) {
this.surname = surname;
}
}
适配器类
public class AdaptorCDATA extends XmlAdapter<String, String> {
@Override
public String marshal(String arg0) throws Exception {
return "<![CDATA[" + arg0 + "]]>";
}
@Override
public String unmarshal(String arg0) throws Exception {
return arg0;
}
}
您可以执行以下操作:
AdapterCDATA
package forum14193944;
import javax.xml.bind.annotation.adapters.XmlAdapter;
public class AdapterCDATA extends XmlAdapter<String, String> {
@Override
public String marshal(String arg0) throws Exception {
return "<![CDATA[" + arg0 + "]]>";
}
@Override
public String unmarshal(String arg0) throws Exception {
return arg0;
}
}
根
@XmlJavaTypeAdapter
注释用于指定应使用XmlAdapter
。
package forum14193944;
import javax.xml.bind.annotation.*;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Root {
@XmlJavaTypeAdapter(AdapterCDATA.class)
private String name;
@XmlJavaTypeAdapter(AdapterCDATA.class)
private String surname;
@XmlJavaTypeAdapter(AdapterCDATA.class)
private String id;
}
演示
我不得不将System.out
包裹在OutputStreamWriter
中以获得理想的效果。另请注意,设置CharacterEscapeHandler
意味着它负责该Marshaller
的所有逃逸处理。
package forum14193944;
import java.io.*;
import javax.xml.bind.*;
import com.sun.xml.bind.marshaller.*;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance(Root.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
File xml = new File("src/forum14193944/input.xml");
Root root = (Root) unmarshaller.unmarshal(xml);
Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.setProperty(CharacterEscapeHandler.class.getName(),
new CharacterEscapeHandler() {
@Override
public void escape(char[] ac, int i, int j, boolean flag,
Writer writer) throws IOException {
writer.write(ac, i, j);
}
});
marshaller.marshal(root, new OutputStreamWriter(System.out));
}
}
input.xml中/输出
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root>
<name><![CDATA[<h1>kshitij</h1>]]></name>
<surname><![CDATA[<h1>solanki</h1>]]></surname>
<id><![CDATA[0]]></id>
</root>
请注意:我是EclipseLink JAXB (MOXy)的领导者和JAXB (JSR-222)专家组的成员。
如果您使用MOXy作为JAXB(JSR-222)提供程序,那么您可以将@XmlCDATA
扩展用于您的用例。
根
@XmlCDATA
注释用于指示您希望包含在CDATA部分中的字段/属性的内容。 @XmlCDATA
注释可以与@XmlElement
结合使用。
package forum14193944;
import javax.xml.bind.annotation.*;
import org.eclipse.persistence.oxm.annotations.XmlCDATA;
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Root {
@XmlCDATA
private String name;
@XmlCDATA
private String surname;
@XmlCDATA
private String id;
}
甲A相比.properties
要将MOXy用作JAXB提供程序,您需要使用以下条目添加名为jaxb.properties
的文件。
javax.xml.bind.context.factory=org.eclipse.persistence.jaxb.JAXBContextFactory
演示
下面是一些演示代码,以证明一切正常。
package forum14193944;
import java.io.File;
import javax.xml.bind.*;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance(Root.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
File xml = new File("src/forum14193944/input.xml");
Root root = (Root) unmarshaller.unmarshal(xml);
Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(root, System.out);
}
}
input.xml中/输出
下面是运行演示代码的输入和输出。
<?xml version="1.0" encoding="UTF-8"?>
<root>
<name><![CDATA[<h1>kshitij</h1>]]></name>
<surname><![CDATA[<h1>solanki</h1>]]></surname>
<id><![CDATA[0]]></id>
</root>
欲获得更多信息
- http://blog.bdoughan.com/2010/07/cdata-cdata-run-run-data-run.html
- http://blog.bdoughan.com/2011/05/specifying-eclipselink-moxy-as-your.html
很抱歉挖掘出这个问题,然后发布一个新答案(我的代表还不够评论......)。我遇到了同样的问题,我尝试了Blaise Doughan的答案,但是从我的测试中,要么它不能涵盖所有情况,要么我在某处做错了。
marshaller.setProperty(CharacterEscapeHandler.class.getName(),
new CharacterEscapeHandler() {
@Override
public void escape(char[] ac, int i, int j, boolean flag,
Writer writer) throws IOException {
writer.write(ac, i, j);
}
});
从我的测试中,无论您是否在属性上使用@XmlJavaTypeAdapter(AdapterCDATA.class)
注释,此代码都会删除所有转义...
为了解决这个问题,我实现了以下CharacterEscapeHandler
:
public class CDataAwareUtfEncodedXmlCharacterEscapeHandler implements CharacterEscapeHandler { private static final char[] cDataPrefix = "<![CDATA[".toCharArray(); private static final char[] cDataSuffix = "]]>".toCharArray(); public static final CDataAwareUtfEncodedXmlCharacterEscapeHandler instance = new CDataAwareUtfEncodedXmlCharacterEscapeHandler(); private CDataAwareUtfEncodedXmlCharacterEscapeHandler() { } @Override public void escape(char[] ch, int start, int length, boolean isAttVal, Writer out) throws IOException { boolean isCData = length > cDataPrefix.length + cDataSuffix.length; if (isCData) { for (int i = 0, j = start; i < cDataPrefix.length; ++i, ++j) { if (cDataPrefix[i] != ch[j]) { isCData = false; break; } } if (isCData) { for (int i = cDataSuffix.length - 1, j = start + length - 1; i >= 0; --i, --j) { if (cDataSuffix[i] != ch[j]) { isCData = false; break; } } } } if (isCData) { out.write(ch, start, length); } else { MinimumEscapeHandler.theInstance.escape(ch, start, length, isAttVal, out); } } }
如果您的编码不是UTF *,您可能不想调用MinimumEscapeHandler,而是调用NioEscapeHandler甚至是DumbEscapeHandler。
com.sun.internal不适用于play2,但这有效
private static String marshal(YOurCLass xml){
try{
StringWriter stringWritter = new StringWriter();
Marshaller marshaller = JAXBContext.newInstance(YourCLass.class).createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.setProperty(Marshaller.JAXB_ENCODING, "ISO-8859-1");
marshaller.marshal(xml, stringWritter);
return stringWritter.toString().replaceAll("<", "<").replaceAll(">", ">");
}
catch(JAXBException e){
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