xmlReader

最新推荐文章于 2025-12-05 17:02:52 发布

最新推荐文章于 2025-12-05 17:02:52 发布 · 100 阅读

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#java

本文介绍了一个用于Java中XML文件解析和操作的实用类。该类提供了读取XML文件、字符串，以及添加、删除节点等功能，并能将修改后的XML文档转换为字符串形式。

package schedulers;

import java.io.File;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

import util.PubFun;

public class XMLReader {

private Document instance = null;

public XMLReader( File file ) {
  try {
   final SAXReader xmlReader = new SAXReader();
   instance = xmlReader.read(file);
  } catch (DocumentException e) {
   System.out.println(file.getPath() + " can't be found");
  }
}

    public XMLReader(StringReader stringReader) {
        try {

            final SAXReader xmlReader = new SAXReader();
            instance = xmlReader.read(stringReader);
            //logger.debug("StringReader successfully loaded");

        } catch (DocumentException e) {
        System.out.println("StringReader can't be load => "+stringReader.toString());
        }
    }

    public XMLReader(String strXML) {
        try {
            instance =   DocumentHelper.parseText(strXML);
        } catch (DocumentException e) {
        System.out.println("StringReader can't be load => "+strXML);
        }
    }

public String getValue( String nodeName ) {

  if (!PubFun.isNullorBlank(nodeName)) {
   final Node node = instance.selectSingleNode(nodeName);
   return ("null".equals(node.getText()) ? null : node.getText());
  } else {
   System.out.println("String is NULL");
   return null;
  }
}

public List getNodes( String nodeName ) {
  if (!PubFun.isNullorBlank(nodeName)) {
   List listNodes = instance.selectNodes(nodeName);
   return listNodes;
  } else {
   System.out.println("String is NULL");
   return null;
  }
}

public String getNodeValue( Node node, String nodeName ) {
  if (!PubFun.isNullorBlank(nodeName)) {
   final Node subNode = node.selectSingleNode(nodeName);
   return ("null".equals(subNode.getText()) ? null : subNode.getText());
  } else {
   System.out.println("String is NULL");
   return null;
  }
}

public boolean removeNode(Node node){
  return node.getParent().remove(node);
}

public Element addElement(String elementName){
  return instance.getRootElement().addElement(elementName);
}

public Document getRoot(){
  return instance;
}

public String writeToString(){
  StringWriter strReturn = new StringWriter();
  XMLWriter writer = null;
  OutputFormat format = OutputFormat.createPrettyPrint();
     format.setEncoding("GBK");
     try {
   //writer= new XMLWriter(ll,format);
     writer = new XMLWriter(strReturn,format);
     //writer = new XMLWriter(new FileOutputStream(new File("c:\\aaa.xml")),format);
   writer.write(instance);
   writer.close();
  } catch (Exception e) {
   // TODO 自动生成 catch 块
   e.printStackTrace();
  }
  return strReturn.toString();
}
}