dom解析xml文件

（从工程中读取xml文件和在工程中创建一个xml文件的demo）

首先在包aa下建一个名为em.xml的文件，内容为

 
  
   tian ping
   111111
  6.01.06.00

 

 

接着在aa下建一个Dom4jTest类，注意要导入以下的包

package aa;
import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.File;
 import java.io.FileReader;
 import java.io.FileWriter;
 import java.io.IOException;
 import org.apache.log4j.Logger;
 import org.dom4j.Attribute;
 import org.dom4j.DocumentException;
 import org.dom4j.DocumentHelper;
 import org.dom4j.Element;

 

 public class Dom4jTest {
   private static final Logger logger = Logger.getLogger(Dom4jTest.class);
 
    public static void main(String[] args) throws IOException,
       DocumentException {
     
         BufferedReader reader=new BufferedReader(new FileReader("src/aa/em.xml"));
         String tempStr;
         String ewXml="";
         while((tempStr=reader.readLine())!=null) {
             ewXml=ewXml+tempStr;
             logger.debug(tempStr);
             System.out.println("tempStr++++++++  "+tempStr);
         }

        Element root = null;
         root = DocumentHelper.parseText(ewXml).getRootElement();
         Attribute rootCmd=root.attribute("cmd");
         Attribute rootVersion=root.attribute("version");
         logger.debug("rootNmae = "+root.getName());
         logger.debug("EW'cmd = "+rootCmd.getValue());
         logger.debug("EW'version = "+rootVersion.getValue());
//         System.out.println("aaaaaaaaaaaaa           "+root.getName());
//         System.out.println("aaaaaaaaaaaaa           "+rootCmd.getValue());
//         System.out.println("aaaaaaaaaaaaa           "+rootVersion.getValue());
         Element usrName=root.element("Username");
         logger.debug("EW.Username value = "+usrName.getTextTrim());
         Element source=root.element("Source");
         Attribute sourceUns=source.attribute("uns");
         logger.debug("EW.Source'uns＝"+sourceUns.getValue());
         Attribute sourceType=source.attribute("type");
         logger.debug("EW.Source'type = "+sourceType.getValue());
        //创建一个Xml文件

        Element user=DocumentHelper.createElement("User");
        user.addAttribute("type", "user");
        user.addElement("name").addAttribute("type", "PinYin").setText("Julysea");
        user.addElement("age").setText("29");
        String oneXml=user.asXML();
       
        BufferedWriter out=new BufferedWriter(new FileWriter("src/aa/oneXml.xml"));
         out.write(oneXml);
         out.close();
     }

 }
接下来要建一个log4j.properties文件，方便log4j的输出，内容如下：

# Set root logger level to DEBUG and its only appender to A1.

log4j.rootLogger=debug, stdout, R

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

# Pattern to output the caller's file name and line number.
log4j.appender.stdout.layout.ConversionPattern=%d %-5p [%C{1}]: %x %m %n

log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=rich-client.log

log4j.appender.R.MaxFileSize=1000KB
# Keep one backup file
log4j.appender.R.MaxBackupIndex=100

log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d %-5p [%C{1}]: %x %m %n

 

源码下载

文件:	xml生成javabean.rar
大小:	13KB
下载:	下载

 

                                                    2006年8月7日jean