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Jakarta-Common-BetWixt使用笔记

祝宾白
2023-12-01
以使用它把 Javabean转换成 XML并输出。

  下载地址:http://commons.apache.org/beanutils/        代码如下:

Javabean:
  
package demo.bean;
  
public class Music ...{
  
  private String name;
  
  private String MP3File;
  
  public String getName() ...{
    return name;
  }
  
  public void setName(String name) ...{
    this.name = name;
  }
  
  public String getMp3File() ...{
    return mp3File;
  }
  
  public void setMp3File(String mp3File) ...{
    this.mp3File = mp3File;
  }
}

  测试代码:

package demo;
  
import java.beans.IntrospectionException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
  
import org.apache.commons.betwixt.io.BeanWriter;
import org.xml.sax.SAXException;
  
import demo.bean.Music;
  
public class BetwixtDemo ...{
  
  public static void main(String[] args) throws IOException, SAXException, IntrospectionException ...{
    
    Music music = new Music();
    music.setName("music_name");
    music.setMp3File("music_mp3file");
    Writer outputWriter = new FileWriter("e:test.xml");
    BeanWriter beanWriter = new BeanWriter(outputWriter);
    beanWriter.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
    beanWriter.getBindingConfiguration().setMapIDs(false);
    beanWriter.enablePrettyPrint();
    beanWriter.setEndTagForEmptyElement(true);
    beanWriter.setIndent(" ");
    beanWriter.writeXmlDeclaration("<?xml version="1.0" encoding="UTF-8" ?>");
    beanWriter.write("Msg", music);
    outputWriter.close();
  }
}

  可指定NameMapper来重新定义大小写

  beanWriter.getXMLIntrospector().getConfiguration().setElementNameMapper(new org.apache.commons.betwixt.strategy.DecapitalizeNameMapper());

  其中:

  DecapitalizeNameMapper 指定义小写

  CapitalizeNameMapper 指定为大写

  HyphenatedNameMapper 指定为连接符 比如mp3File ==> mp3-file

  可以通过HyphenatedNameMapper.setUpperCase(true)设置首字母的大小写

  也可实现NameMapper来定义自己的现实方式

  如:class ItsANameMapper implements NameMapper { ...... }

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