JAXB 编组 使用 CDATA 取消编组

2022-09-01 11:30:30

我正在尝试使用 JAXB 进行封送处理。

我的输出是这样的:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root>
    <name>&lt;![CDATA[&lt;h1&gt;kshitij&lt;/h1&gt;]]&gt;</name>
    <surname>&lt;h1&gt;solanki&lt;/h1&gt;</surname>
    <id>&lt;h1&gt;1&lt;/h1&gt;</id>
</root>

...但我需要这样的输出:

<?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>

我正在使用以下代码来执行此操作。

如果我取消注释代码,我会得到.没有它,我可以编译,但我不能得到确切的所需输出。PropertyBindingException

  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);
        }       
    }
}

我的豆子看起来像这样:

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;
    }
}

答案 1

您可以执行以下操作:

适配器CDATA

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;
    }

}

批注用于指定应使用 。@XmlJavaTypeAdapterXmlAdapter

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

我必须包装一个才能获得所需的效果。另请注意,设置 a 意味着它负责该 的所有转义处理。System.outOutputStreamWriterCharacterEscapeHandlerMarshaller

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));
    }

}

输入.xml/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>

答案 2

请注意:我是EclipseLink JAXB(MOXy)负责人,也是JAXB(JSR-222)专家组的成员。

如果您使用 MOXy 作为 JAXB (JSR-222) 提供程序,则可以将扩展用于您的用例。@XmlCDATA

批注用于指示您希望将字段/属性的内容包装在 CDATA 节中。该批注可与 结合使用。@XmlCDATA@XmlCDATA@XmlElement

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;

}

jaxb.properties

要使用 MOXy 作为 JAXB 提供程序,您需要添加使用以下条目命名的文件。jaxb.properties

javax.xml.bind.context.factory=org.eclipse.persistence.jaxb.JAXBContextFactory

演示

下面是一些演示代码,用于证明一切正常。

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);
    }

}

输入.xml/输出

以下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>

详细信息


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