［100高分求解］解析简单的XML

[leesy]

<A>
<B>bbb</B>
<C>ccc</C>
<D id=1>
<E>eee</E>
<F>fff</F>
</D>
<D id=2>
<E>eeee</E>
<F>ffff</F>
</D>
</A>

//其中通过getDefine（"/A/B/D[id=1]/E"）返回:eee
//通过getDefine（"/A/B/D[id=2]"）返回:<E>eeee</E><F>ffff</F>

用Java怎么实现？谢谢！

[海会圣贤]

好像没有直接解折的方法!
一般是自己写！因为xml本身就很灵活

[huangyangweiyue]

解析类

package com.source.DAO;

import java.sql.*;

import org.dom4j.Element;
import java.util.Iterator;
import com.Xml.dom4j.MyDom4j;

public class DBConnection {
	
	private String url = "";
	private String driver ="";
	private String password = "";
	private String user = "";
	private Element e ;
	private Element element;
	
	private Connection conn = null;
	
	public DBConnection(String xPath)
	{
		MyDom4j dom4j = new MyDom4j();
		e = dom4j.getDocument(xPath);
		for(Iterator it = e.elementIterator("connection");it.hasNext();)
		{
			element = (Element)it.next();
		}
		this.url = element.elementText("url");
		this.driver = element.elementText("driver");
		this.password = element.elementText("pwd");
		this.user = element.elementText("user");
	}
	
	private Connection setConn()
	{
		try {
			Class.forName(driver);
			conn = DriverManager.getConnection(url, user, password);
		} catch (ClassNotFoundException e) {
			// TODO 自动生成 catch 块
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO 自动生成 catch 块
			e.printStackTrace();
		}
		return conn;
	}
	
	public Connection getConn()
	{
		return setConn();
	}
	
	public void closeConn()
	{
		try {
			conn.close();
		} catch (SQLException e) {
			// TODO 自动生成 catch 块
			e.printStackTrace();
		}
	}

}

[huangyangweiyue]

DOM4J解析用法

package com.Xml.dom4j;

import java.io.File;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

public class MyDom4j {
	
	private static Document doc;
	private static SAXReader saxReader;
	private static Element element;
	
	
	private static File getFile(String filePath)
	{
		File file = new File(filePath);
		return file;
	}
	
	public Element getDocument(String filePath)
	{
		try {
			File file = getFile(filePath);
			saxReader = new SAXReader();
			doc = saxReader.read(file);
			element = doc.getRootElement();
		} catch (DocumentException e) {
			// TODO 自动生成 catch 块
			e.printStackTrace();
		}
		return element;
	}

}

[lovewds2002]

顶一个.

[miaoliujun]

你的这种写法是XSL写法吧或者用的xquery
个人建议你看下xstream，这个更方便

[海会圣贤]

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

import java.io.IOException;
import java.io.StringWriter;

//读取xml文件
public class XMLBlob {

private String xml;

private String column;

private Document doc;

public XMLBlob(String column) {
doc = DocumentHelper.createDocument();
doc.setXMLEncoding("UTF-8");
doc.addElement(column);
this.column = column;
}

public XMLBlob(String xml, String column) {
this.xml = xml;
this.column = column;
try {
doc = DocumentHelper.parseText(xml);
} catch (DocumentException e) {

}
}

public String getXml() {
StringWriter stringWriter = new StringWriter();
XMLWriter writer = new XMLWriter(stringWriter);
OutputFormat format = OutputFormat.createCompactFormat();
format.setEncoding("UTF-8");
try {
writer.write(doc);
writer.close();
this.xml = stringWriter.toString();
stringWriter.close();
} catch (IOException e) {
this.xml = null;
}
return xml;
}

public void setXml(String xml) {
this.xml = xml;
}

public String getColumn() {
return column;
}

public void setColumn(String column) {
this.column = column;
}

public void setValue(String name, String value) {
Element root = doc.getRootElement();
Element element = root.element(name);
if(element == null) {
element = root.addElement(name);
}
element.setText(value);
}

public String getValue(String name) {
Element root = doc.getRootElement();
Element element = root.element(name);
return element.getText();
}
}

//******************************************************************************
//测试类


public class TestXML {

/**
* @param args
*/
public static void main(String[] args) {

XMLBlob xml = new XMLBlob("customerInfo");
xml.setValue("phoneNumber", "1234556");
xml.setValue("phoneNumber", "6543221");
xml.setValue("mobile", "136543221");
String str = xml.getXml();

XMLBlob x = new XMLBlob(str, "customerInfo");
String val = x.getValue("phoneNumber");

System.out.println(str);
System.out.println(val);
}

}

楼主结贴去吧！

[xingfuxiao]

路过。我来顶一下。。。

[xingfuxiao]

不错啊。学习了。谢谢哦。

[leesy]

难道就没有一个方法直接解析这个XML吗？谢谢你们的参与！

[非典型射手]

简单的XML就用DOM就行了,树型结构,层次分明

[chensheng913]

用Dom4j解析，能够满足你的需要。

[大虾哥哥]

用jdom或者dom4j解析比较方便
以使用dom1.0为例：
Document doc = new Document();//jdom的Document对象
SAXBuilder sb = new SAXBuilder();//SAX解析器
doc = sb.build("xml的路径");
XPath xpath1 = XPath.newInstance("/A/B/D[id=1]/E");//xpath定位
XPath xpath2 = XPath.newInstance("/A/B/D[id=2]");
Content cont = (Content)xpath1.selectSingleNode(doc);//得到Content对象
Element ele = (Element)xpath2.selectSingleNode(doc);得到//Element对象

[leesy]

算账啦～～