jsp和servlet传值问题

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我做了一个简单的例子实现jsp和servlet之间的传值，由于我是新手，刚刚接触jsp和servlet，所以花了好多的时间来实现，下面就把源码和遇到的问题写下来，方便自己复习，也希望可以帮到有需要的同学。

index.jsp

</pre><p></p><p></p><pre name="code" class="html"><%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><%@ page import="servlet.seg"%><%@ page import="Struct.word"%><%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>My JSP 'index.jsp' starting page</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>  <% String word=(String)request.getAttribute("word"); %>  <%String name="请输入";  name=(String)request.getAttribute("name"); %>    <!-- 上面这句话是从servlet里面接收数据 -->  <body>      <form name="form" action="seg" method=post>    <input type="text" name=name>    <input type="textarea" name=pas value=<%=word%> >    <input type="submit" value="submit"></form> <br>   </body></html>

seg.java

package servlet;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import Struct.word;import word_segment.NlpirTest;import GUI.word_data;//获取从jsp传来的text值，并且进行分词public class seg extends HttpServlet{List<word> data=new ArrayList<word>();//获得的分词List<word> keyWordsp=new ArrayList<word>();//获得的情感词List<word> keyWordsn=new ArrayList<word>();//情感词@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {// TODO Auto-generated method stub//获取text值resp.setContentType("text/html,charset=utf-8");req.setCharacterEncoding("utf-8");String text=req.getParameter("name");word_data a=new word_data();word_segment.NlpirTest nlpirTest = new word_segment.NlpirTest();String result=nlpirTest.word_seg(text);data=a.getword(result);//PrintWriter out=resp.getWriter();if(data.size()>0){result=result.replace(" ", "");req.setAttribute("word",result);req.getRequestDispatcher("/index.jsp").forward(req, resp);}}@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {// TODO Auto-generated method stubthis.doGet(req, resp);}}

web.xml中加入

<servlet>    <servlet-name>seg</servlet-name>  <servlet-class>servlet.seg</servlet-class>  </servlet>  <servlet-mapping>  <servlet-name>seg</servlet-name>  <url-pattern>/seg</url-pattern>  </servlet-mapping>

实现的功能如下

就是在第一个框里输入一段话，单击按钮提交后会把分词结果显示在第二个框里面，现在有一个疑问，就是不知道怎么可以再第二个页面里保持第一个框里的

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