项目结构
paramsForm.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
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>数据页面</title>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<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 method="post" action="ThreeParams">
<p>数据1<input type="text" name="gr1"></p><br>
<p>数据2<input type="text" name="gr2"></p><br>
<p>数据3<input type="text" name="gr3"></p><br>
<p><input type="submit" value="提交"><input type="reset" value="清楚"></p>
</form>
</body>
</html>
ThreeParams.java
package servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ThreeParams extends HttpServlet{
protected void processRequest(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{
response.setContentType("text/html;charset=UTF-8");
PrintWriter out=response.getWriter();
out.println("<html>");
out.println("<body>");
out.println(request.getParameter("gr1")+"<br>");
out.println(request.getParameter("gr2")+"<br>");
out.println(request.getParameter("gr3")+"<br>");
out.println("</body>");
out.println("</html>");
out.close();
}
protected void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{
processRequest(request, response);
}
protected void doPost(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{
processRequest(request, response);
}
}
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns=http://java.sum.com/xml/ns/javaee xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sum.com/xml/ns/javaee/web-app_3_0.xsd">
<servlet>
<servlet-name>ThreeParams</servlet-name>
<servlet-class>servlet.ThreeParams</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ThreeParams</servlet-name>
<servlet-class>/ThreeParams</servlet-class>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
</web-app>
错误
但是不知道为什么打不开
