jsp中操作xml运行不了??

web.xml文件的内容:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
</web-app>

貌似你这个jar版本的事
你升级一下版本（crimson）

我尝试了一下，没有任何的问题。web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

可能和tomcat有关系的。
我的环境：jdk1.6tomcat 6.0eclipse +myeclipse6.0

我平时是使用jdom.jar开源包解析XML的，那个挺简单。
jdom.jar 从此处下载 http://jdom.org/dist/binary/下面是个简单的例子：
一个简单的例子
JDOM的处理方式有些类似于DOM，但它主要是用SAX实现的，你不必担心处理速度和内存的问题。另外，JDOM中几乎没有接口，的类全部是实实在在的类，没有类工厂类的。下面是实例用的XML文件: MyXml.xml<?xml version="1.0" encoding="utf-8"?>
<书库>
  <书>
    <书名>Java编程入门</书名>
    <作者>张三</作者>
    <出版社>电子出版社</出版社>
    <价格>35.0</价格>
    <出版日期>2002-10-07</出版日期>
  </书>
  <书>
    <书名>XML在Java中的应用</书名>
    <作者>李四</作者>
    <出版社>希望出版社</出版社>
    <价格>92.0</价格>
    <出版日期>2002-10-07</出版日期>
  </书>
</书库>

下面是操作XML文件的Bean: XmlBean.javapackage jdom.test;/**
* XML的读写操作Bean
*/
import java.io.*;
import java.util.*;
import org.jdom.*;
import org.jdom.output.*;
import org.jdom.input.*;
import javax.servlet.*;
import javax.servlet.http.*;public class XmlBean {
private String bookname, author, pub, price, pubdate; public String getbookname() {
  return bookname;
} public String getauthor() {
  return author;
} public String getpub() {
  return pub;
} public String getprice() {
  return price;
} public String getpubdate() {
  return pubdate;
} public void setbookname(String bookname) {
  this.bookname = bookname;
} public void setauthor(String author) {
  this.author = author;
} public void setpub(String pub) {
  this.pub = pub;
} public void setprice(String price) {
  this.price = price;
} public void setpubdate(String pubdate) {
  this.pubdate = pubdate;
} public XmlBean() {
} /**
  * 读取XML文件所有信息
  */
public Vector LoadXML(String path) throws Exception {
  Vector xmlVector = null;
  FileInputStream fi = null;
  try {
   fi = new FileInputStream(path);
   xmlVector = new Vector();
   SAXBuilder sb = new SAXBuilder();
   Document doc = sb.build(fi);
   Element root = doc.getRootElement(); // 得到根元素
   List books = root.getChildren(); // 得到根元素所有子元素的集合
   Element book = null;
   XmlBean xml = null;
   for (int i = 0; i < books.size(); i++) {
    xml = new XmlBean();
    book = (Element) books.get(i); // 得到第一本书元素
    xml.setbookname(book.getChild("书名").getText());
    xml.setauthor(book.getChild("作者").getText());
    xml.setpub(book.getChild("出版社").getText());
    xml.setprice(book.getChild("价格").getText());
    xml.setpubdate(book.getChild("出版日期").getText());
    xmlVector.add(xml);
   }
  } catch (Exception e) {
   System.err.println(e + "error");
  } finally {
   try {
    fi.close();
   } catch (Exception e) {
    e.printStackTrace();
   }
  }
  return xmlVector;
} /**
  * 删除XML文件指定信息
  */
public static void DelXML(HttpServletRequest request) throws Exception {
  FileInputStream fi = null;
  FileOutputStream fo = null;
  try {
   request.setCharacterEncoding("GBK");
   String path = request.getParameter("path");
   int xmlid = Integer.parseInt(request.getParameter("id"));
   fi = new FileInputStream(path);
   SAXBuilder sb = new SAXBuilder();
   Document doc = sb.build(fi);
   Element root = doc.getRootElement(); // 得到根元素
   List books = root.getChildren(); // 得到根元素所有子元素的集合
   books.remove(xmlid);// 删除指定位置的子元素
//   String indent = " ";
//   boolean newLines = true;
//   XMLOutputter outp = new XMLOutputter(indent, newLines, "GBK");
      Format format = Format.getPrettyFormat();
      format.setIndent("  ");
      format.setEncoding("utf-8");
      XMLOutputter outp = new XMLOutputter(format);
   fo = new FileOutputStream(path);
   outp.output(doc, fo);
  } catch (Exception e) {
   System.err.println(e + "error");
  } finally {
   try {
    fi.close();
    fo.close();
   } catch (Exception e) {
    e.printStackTrace();
   }
  }
} /**
  * 添加XML文件指定信息
  */
public static void AddXML(HttpServletRequest request) throws Exception {
  FileInputStream fi = null;
  FileOutputStream fo = null;
  try {
   request.setCharacterEncoding("GBK");
   String path = request.getParameter("path");
   fi = new FileInputStream(path);
   SAXBuilder sb = new SAXBuilder();
   Document doc = sb.build(fi);
   Element root = doc.getRootElement(); // 得到根元素
   List books = root.getChildren(); // 得到根元素所有子元素的集合
   String bookname = request.getParameter("bookname");
   String author = request.getParameter("author");
   String price = request.getParameter("price");
   String pub = request.getParameter("pub");
   String pubdate = request.getParameter("pubdate");
//   Text newtext;
   Element newbook = new Element("书");
   Element newname = new Element("书名");
   newname.setText(bookname);
   newbook.addContent(newname);
   Element newauthor = new Element("作者");
   newauthor.setText(author);
   newbook.addContent(newauthor);
   Element newpub = new Element("出版社");
   newpub.setText(pub);
   newbook.addContent(newpub);
   Element newprice = new Element("价格");
   newprice.setText(price);
   newbook.addContent(newprice);
   Element newdate = new Element("出版日期");
   newdate.setText(pubdate);
   newbook.addContent(newdate);
   books.add(newbook);// 增加子元素
//   String indent = " ";
//   boolean newLines = true;
//   XMLOutputter outp = new XMLOutputter(indent, newLines, "GBK");
      Format format = Format.getPrettyFormat();
      format.setIndent("  ");
      format.setEncoding("utf-8");
      XMLOutputter outp = new XMLOutputter(format);
   fo = new FileOutputStream(path);
   outp.output(doc, fo);
  } catch (Exception e) {
   System.err.println(e + "error");
  } finally {
   try {
    fi.close();
    fo.close();
   } catch (Exception e) {
    e.printStackTrace();
   }
  }
} /**
  * 修改XML文件指定信息
  */
public static void EditXML(HttpServletRequest request) throws Exception {
  FileInputStream fi = null;
  FileOutputStream fo = null;
  try {
   request.setCharacterEncoding("GBK");
   String path = request.getParameter("path");
   int xmlid = Integer.parseInt(request.getParameter("id"));
   fi = new FileInputStream(path);
   SAXBuilder sb = new SAXBuilder();
   Document doc = sb.build(fi);
   Element root = doc.getRootElement(); // 得到根元素
   List books = root.getChildren(); // 得到根元素所有子元素的集合
   Element book = (Element) books.get(xmlid);
   String bookname = request.getParameter("bookname");
   String author = request.getParameter("author");
   String price = request.getParameter("price");
   String pub = request.getParameter("pub");
   String pubdate = request.getParameter("pubdate");
//   Text newtext;
   Element newname = book.getChild("书名");
   newname.setText(bookname);// 修改书名为新的书名
   Element newauthor = book.getChild("作者");
   newauthor.setText(author);
   Element newpub = book.getChild("出版社");
   newpub.setText(pub);
   Element newprice = book.getChild("价格");
   newprice.setText(price);
   Element newdate = book.getChild("出版日期");
   newdate.setText(pubdate);
   // books.set(xmlid,book);//修改子元素
//   String indent = " ";
//   boolean newLines = true;
//   XMLOutputter outp = new XMLOutputter(indent, newLines, "GBK");
      Format format = Format.getPrettyFormat();
      format.setIndent("  ");
      format.setEncoding("utf-8");
      XMLOutputter outp = new XMLOutputter(format);
   fo = new FileOutputStream(path);
   outp.output(doc, fo);
  } catch (Exception e) {
   System.err.println(e + "error");
  } finally {
   try {
    fi.close();
    fo.close();
   } catch (Exception e) {
    e.printStackTrace();
   }
  }
}
}

下面是操作的jsp文件: test.jsp
<%@ page contentType="text/html;charset=GBK"%>
<%@ page language="java" import="java.util.*,jdom.test.*"%>
<html>
<head>
<title>读取XML文件资料</title>
</head>
<body>
<h3 align="center">JDOM操作XML文件</h3>
<p align="center">读取XML文件中的所有资料</p>
<center>
<table border="1" cellpadding="0" cellspacing="1"
style="border-collapse: collapse" width="80%" id="AutoNumber1">
<tr>
  <td align="center" width="92">书名</td>
  <td align="center" width="92">作者</td>
  <td align="center" width="92">出版社</td>
  <td align="center" width="92">价格</td>
  <td align="center" width="92">出版日期</td>
  <td align="center" width="94">操作</td>
</tr>
</table>
<%
  String path = application.getRealPath("/JDOM/MyXml.xml");
  XmlBean xml = new XmlBean();
  Vector xmlall = xml.LoadXML(path);
  for (int i = 0; i < xmlall.size(); i++) {
   xml = (XmlBean) xmlall.elementAt(i);
   /**out.println("书名:"+xml.getbookname()+"<br>");
    out.println("作者:"+xml.getauthor()+"<br>");
    out.println("出版社:"+xml.getpub()+"<br>");
    out.println("价格:"+xml.getprice()+"<br>");
    out.println("出版日期:"+xml.getpubdate()+"<br><br>");
    */
%>
<table border="1" cellpadding="0" cellspacing="1"
style="border-collapse: collapse" width="80%" id="AutoNumber2">
<tr>
  <td align="center" width="92"><%=xml.getbookname()%></td>
  <td align="center" width="92"><%=xml.getauthor()%></td>
  <td align="center" width="92"><%=xml.getpub()%></td>
  <td align="center" width="92"><%=xml.getprice()%></td>
  <td align="center" width="92"><%=xml.getpubdate()%></td>
  <td align="center" width="94"><a
   href="xmlaction.jsp?act=del&id=<%=i%>&path=<%=path%>">删除</a></td>
</tr>
</table>
<%}%></center>
<form method="POST" action="xmlaction.jsp">
<p align="center"><input type="radio" value="add" checked name="act">添加资料
<input type="radio" value="edit" name="act">编辑资料序号:<select size="1"
name="id">
<%for (int i = 0; i < xmlall.size(); i++) {%>
<option value="<%=i%>">第<%=i + 1%>条</option>
<%}%>
</select><br>
书名:<input type="text" name="bookname" size="20"><br>
作者:<input type="text" name="author" size="20"><br>
出版社:<input type="text" name="pub" size="20"><br>
价格:<input type="text" name="price" size="20"><br>
日期:<input type="text" name="pubdate" size="20"></p>
<input type="hidden" name="path" value="<%=path%>">
<p align="center"><input type="submit" value="提交" name="B1"><input
type="reset" value="重置" name="B2"></p>
</form>
</body>
</html>下面是处理上一文件提交的jsp文件: xmlation.jsp
<%@ page contentType="text/html;charset=GBK"%>
<%@ page language="java" import="jdom.test.*"%>
<%if (request.getParameter("act") != null
    && request.getParameter("act").equals("add")) {
   XmlBean.AddXML(request);
   out.println("<p align='center'><br><br>添加成功<br><br><a href='test.jsp'>返回</a>");
  } else if (request.getParameter("act") != null
    && request.getParameter("act").equals("del")) {
   XmlBean.DelXML(request);
   out.println("<p align='center'><br><br>删除成功<br><br><a href='test.jsp'>返回</a>");
  } else if (request.getParameter("act") != null
    && request.getParameter("act").equals("edit")) {
   XmlBean.EditXML(request);
   out.println("<p align='center'><br><br>修改成功<br><br><a href='test.jsp'>返回</a>");
  } else {
   out.print("<p align='center'><br><br>非法操作<br><br><a href='test.jsp'>返回</a>");
  }
%>

调试易

jsp中操作xml运行不了??

解决方案 »