jsp中操作xml运行不了??
我有两个文件
XML.jsp文件内容如下:
<%@ page language="java" import="java.util.*" pageEncoding="GBK" contentType="text/html;charset=gb2312"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>书目信息</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action="XMLDao.jsp?action=submit" method="post">
<font size="3">
<br />
书名:<input type="text" name="bookname" size="20" />
<br />
索引号:<input type="text" name="indexnm" size="20" />
<br />
出版社:<input type="text" name="bookconcern" size="20" />
<br />
类别:<input type="text" name="class" size="20" />
<br />
提交:<input type="submit" name="submit" value="确定" />
</font>
</form>
</body>
</html>
XMLDao.jsp文件内容如下:
<%@ page language="java" import="java.util.*" pageEncoding="GBK" contentType="text/html;charset=gb2312"%>
<%@ page import="java.io.*" %>
<%@ page import="org.apache.crimson.tree.*" %>
<%@ page import="org.w3c.dom.*" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>处理书目</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%
String action = (String)request.getParameter("action");
class trans {//字符转换类trans,避免中文出现乱码
public String getStr(String str) {
try {
String temp1 = str;
byte[] temp2 = temp1.getBytes("ISO-8859-1");
String temp = new String(temp2);
return temp;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
trans trs = new trans();//创建一个字符转换类的实例trs;
if ("submit".equals(action)) {
String bookname = (String)request.getParameter("bookname");
String indexnm = (String)request.getParameter("indexnm");
String bookconcern = (String)request.getParameter("bookconcern");
String b_class = (String)request.getParameter("class");
out.println("您录入的书籍信息是:");
out.println("<br />");
String b_bookname = trs.getStr(bookname);
out.println("书名:" + b_bookname);
out.println("<br />");
out.println("索引号:" + indexnm);
out.println("<br />");
String b_bookconcern = trs.getStr(bookconcern);
out.println("出版社:" + b_bookconcern);
out.println("<br />");
String b_b_class = trs.getStr(b_class);
out.println("类别:" + b_b_class);
out.println("<br />");
XmlDocument xmldoc = new XmlDocument();
ElementNode bookinfo = (ElementNode)xmldoc.createElement("bookinfo");
ElementNode name = (ElementNode)xmldoc.createElement("bookname");
ElementNode index = (ElementNode)xmldoc.createElement("indexnm");
ElementNode bookc = (ElementNode)xmldoc.createElement("bookconcern");
ElementNode bclass = (ElementNode)xmldoc.createElement("bclass");
FileOutputStream fileout = new FileOutputStream("book.xml");
xmldoc.appendChild(bookinfo);
bookinfo.appendChild(name);
bookinfo.appendChild(index);
bookinfo.appendChild(bookc);
bookinfo.appendChild(bclass);
name.appendChild(xmldoc.createTextNode(bookname));
index.appendChild(xmldoc.createTextNode(indexnm));
bookc.appendChild(xmldoc.createTextNode(bookconcern));
bclass.appendChild(xmldoc.createTextNode(b_class));
xmldoc.write(fileout);
out.println("该信息已写入book.xml文件");
}
%>
</body>
</html>
但我运行XML.jsp出现如下错误:
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: XML parsing error on file /WEB-INF/web.xml: (line 4, col -1)
org.apache.jasper.xmlparser.ParserUtils.parseXMLDocument(ParserUtils.java:103)
org.apache.jasper.compiler.JspConfig.processWebDotXml(JspConfig.java:70)
org.apache.jasper.compiler.JspConfig.init(JspConfig.java:188)
org.apache.jasper.compiler.JspConfig.findJspProperty(JspConfig.java:240)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:160)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:470)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
java.lang.IllegalStateException: can't declare any more prefixes in this context
org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:691)
org.apache.crimson.parser.Parser2.parse(Parser2.java:337)
org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:448)
org.apache.crimson.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:185)
javax.xml.parsers.DocumentBuilder.parse(Unknown Source)
org.apache.jasper.xmlparser.ParserUtils.parseXMLDocument(ParserUtils.java:98)
org.apache.jasper.compiler.JspConfig.processWebDotXml(JspConfig.java:70)
org.apache.jasper.compiler.JspConfig.init(JspConfig.java:188)
org.apache.jasper.compiler.JspConfig.findJspProperty(JspConfig.java:240)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:160)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:470)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.
请问这是什么原因啊,我在项目文件夹下面导入了一个crimson.jar包,是对xml文件进行操作的,请高手赐教!!
[解决办法]
貌似你这个jar版本的事
你升级一下版本（crimson）
[解决办法]
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>
[解决办法]
可能和tomcat有关系的。
我的环境：
jdk1.6
tomcat 6.0
eclipse +myeclipse6.0
[解决办法]
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>
[解决办法]
下面是操作XML文件的Bean: XmlBean.java
package 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();
}
}
}
}
------解决方案--------------------
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>");
}
%>
我的异常网推荐解决方案：The server encountered an internal error () that prevented it from fulfilling this request.,http://www.myexception.cn/java-web/317.html
