jsp中读取xml文件中内容的方法，案例如下：
1、XML文件
<?xml version="1.0" encoding="GB2312" ?><!-- 个人履历表-->
<resume>
<person id="01">
<name>张三</name>
<birthday>03/24/1975</birthday>
<phone>1111-1111</phone>
<address>大连</address>
</person>
<person id="02">
<name>李四</name>
<birthday>9/26/1978</birthday>
<phone>2222-2222</phone>
<address>南京</address>
</person>
<person id="03">
<name>王五</name>
<birthday>11/09/1979</birthday>
<phone>3333-3333</phone>
<address>武汉</address>
</person>
<person id="04">
<name>赵六</name>
<birthday>6/04/1973</birthday>
<phone>4444-4444</phone>
<address>青岛</address>
</person>
<person id="05">
<name>陈七</name>
<birthday>12/19/1977</birthday>
<phone>5555-5555</phone>
<address>上海</address>
</person>
</resume>
2、MyDOMBean.java
package testimport org.xml.sax.*
import javax.xml.parsers.*
import org.w3c.dom.*
import java.io.*
public class MyDOMBean implements java.io.Serializable ...{
private static String xmlStr=""
private static final String PATH="file:///"
public MyDOMBean() ...{
}
public String getString()...{
return xmlStr
}
public static Document getDocument(String filename) throws Exception ...{
xmlStr=""
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance()
// 设定解析的叁数
dbf.setIgnoringComments(true)
dbf.setIgnoringElementContentWhitespace(true)
DocumentBuilder db = dbf.newDocumentBuilder()
//导入XML文件
Document doc = db.parse(PATH+filename)
return doc
}
public void traverseTree(Node node) throws Exception ...{
if(node == null) ...{
return
}
int type = node.getNodeType()
switch (type) ...{
case Node.DOCUMENT_NODE: ...{
xmlStr+="<tr>"
traverseTree(((Document)node).getDocumentElement())
break
}
// *** 作XML元素节点
case Node.ELEMENT_NODE: ...{
String elementName = node.getNodeName()
if(elementName.equals("person")) ...{
xmlStr+="</tr><tr>"
}
NodeList childNodes =node.getChildNodes()
if(childNodes != null) ...{
int length = childNodes.getLength()
for (int loopIndex = 0 loopIndex <
length loopIndex++)
...{
traverseTree(childNodes.item(loopIndex))
}
}
break
}
// *** 作XML文本节点
case Node.TEXT_NODE: ...{
String data = node.getNodeValue().trim()
if((data.indexOf(" ") <0) && (data.length()> 0)) ...{
xmlStr+="<td>"+data+"</td>"
}
}
}
}
}
3、jsp文件
<html><head>
<title>使用DOM解析器</title>
</head>
<%...@ page import="org.w3c.dom.*"%>
<%...@ page contentType="text/htmlcharset=GB2312" %>
<body bgcolor="#CFF1E1">
<center>
<h2>个人履历表（DOM版）</h2>
<table border="1" width="80%">
<tr>
<td>姓名</td>
<td>出生年月</td>
<td>电话号码</td>
<td>居住地</td>
</tr>
<jsp:useBean id="domparser" class="test.MyDOMBean" />
<%...
Document doc = domparser.getDocument(request.getRealPath("/") + "08_02.xml")
domparser.traverseTree(doc)
out.print(domparser.getString())
%>
</body>
</html>
1， jsp 解析xmljava解析xml有三种方式
1）dom,jdk自带，树形结构，缺点：一次性将xml文件加载到内存中，xml文件过大，效率很低
2）Dom4j.jar:第三方工具包（需导包），java中使用
3）sax:实现复杂，解决Dom文件过大问题，不是一次性加载，基于事件驱动模式解析
2，JSP *** 作XML
JSP读写XML文件
<%@ page contentType="text/htmlcharset=utf-8" %>
<%@ page import = "java.io.*,java.util.*,com.hexun.wap.zgpack.*,org.jdom.*,org.jdom.input.*,org.jdom.output.*" %>
<html>
<head>
<title>Basic News Page</title>
<style type="text/css"><!--td {font-size:12px}--></style>
</head>
<body>
<%
String t = request.getParameter("t")!=null?request.getParameter("t"):""
String s = request.getParameter("s")!=null?request.getParameter("s"):""
String d = request.getParameter("detail")!=null?request.getParameter("detail"):""
String delete = request.getParameter("delete")!=null?request.getParameter("delete"):""
String id = request.getParameter("id")!=null?request.getParameter("id"):""
SAXBuilder sb = new SAXBuilder()
String indent = " "
boolean newLines = true
XMLOutputter outp = new XMLOutputter (indent,newLines,"gb2312")
String flag = request.getParameter("flag")!=null?request.getParameter("flag"):"false"
if(flag.equals("true"))
{
byte[] b = t.getBytes("iso8859-1")
String ti = new String(b,"utf-8")
byte[] b2 = s.getBytes("iso8859-1")
String si = new String(b2,"utf-8")
byte[] b3 = d.getBytes("iso8859-1")
String di = new String(b3,"utf-8")
try
{
Document doc=sb.build(new FileInputStream("/usr/local/stockdata/basic.xml"))
Element root=doc.getRootElement()
List list=root.getChildren()
Element article = new Element("message")
article.setAttribute("id",(list.size()+10001)+"")
article.addContent(new Element("title").setText(ti))
article.addContent(new Element("content").setText(di))
article.addContent(new Element("time").setText(si))
doc.getRootElement().addContent(article)
outp.output(doc,new FileOutputStream("/usr/local/stockdata/basic.xml"))
}
catch(Exception e)
{
e.printStackTrace()
}
s = ""
d = ""
t = ""
}
if(delete.equals("true"))
{
new XMLFile().removeContent("/usr/local/stockdata/basic.xml",Integer.parseInt(id))
}
%>
<form action="OperBasic.jsp" method="post">
<table width=80% border=0 bgcolor=#FFE4C4 cellspacing=1 cellpadding=1 align=center>
<tr><td colspan=2>Add Basic News :</td></tr>
<tr>
<td>Title:</td><td><input type="text" name="t" value="<%=t%>" maxlength="60" format="*N" style="border-width:1border-color:blackborder-style:solid"/></td></tr>
<tr><td>Time/Author:</td><td><input type="text" name="s" value="<%=s%>" maxlength="20" format="*N" style="border-width:1border-color:blackborder-style:solid"/></td></tr>
<tr><td>Content:</td><td><textarea name="detail" rows="10" cols="66" style="border-width:1border-color:blackborder-style:solid"></textarea><br/>
</td>
<tr><td colspan=2 align=center><input type="submit" name="submit" value="Add"/></td>
<input type="hidden" name="flag" value="true" maxlength="20" format="*N"/>
</tr>
</table>
</form>
<table width=80% border=0 bgcolor=000000 cellspacing=1 cellpadding=1 align=center><tr><td bgcolor=FF7Dff>ID</td><td bgcolor=FF7Dff>Title</td><td bgcolor=FF7Dff>Content</td><td bgcolor=FF7Dff>Time / Author</td><td bgcolor=FF7Dff>Delete</td></tr>
<%
try
{
Document doc = sb.build(new FileInputStream("/usr/local/stockdata/basic.xml"))
Element root = doc.getRootElement()
List list = root.getChildren()
out.println("all:"+list.size())
for(int i=0i<list.size()i++)
{
Element item = (Element)list.get(i)
String name = item.getAttribute("id").getValue()
out.println("<tr><td width=5% height=30 align=left bgcolor=FF7D00>"+name+"</td>")
Element sub = item.getChild("title")
String text = sub.getText()
out.println("<td width=10% height=30 align=left bgcolor=FF7D00>"+ text+"</td>")
Element sub2 = item.getChild("content")
String text2 = sub2.getText()
out.println("<td width=50% align=left bgcolor=FF7D00>"+ text2+"</td>")
Element sub3 = item.getChild("time")
String text3 = sub3.getText()
out.println("<td width=10% align=left bgcolor=FF7D00>"+ text3+ "</td>")
out.println("<td width=5% align=left bgcolor=FF7D00><a href=OperBasic.jsp?delete=true&id="+ i +" onclick=/"{if(confirm("+"'are you sure?'"+")){return true}return false}/">Delete</a></td>")
//out.println("<td width=5% align=left bgcolor=FF7D00><a href=OperBasic.jsp?delete=true&id="+ i + ">Delete</a></td>")
out.println("</tr>")
}
}
catch(Exception e)
{
e.printStackTrace()
}
%>
</table>
<br/>
</body>
</html>
欢迎分享，转载请注明来源：内存溢出
微信扫一扫
支付宝扫一扫
评论列表（0条）