用MyEclipse编写一个Servlet处理表单的程序(小白进阶）
程序实现功能如图所示：
1.首先启动Tomcat7.0服务（双击.exe文件）
2.打开MyEclipse——>选择Window选项下——>Preferences——>MyEclipse
——>Servers——>Tomcat——>Tomcat7.x进行设置
3.打开MyEclipse——>new——>Web Project进行新建web项目文件
4.在testone右击新建——>package建包sun.hebtu——>包上右击新建Servlet命名为servletone
5.打开testone——>WebRoot——>index.jsp文件打开进行jsp页面的设计
在<body></body>体中进行主要代码编写，实现创建表单功能，以下是index.jsp文件中的全部代码
<%@ 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>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>
<body>
<h1>潜在用户网络调查</h1><br>
<form action="servletone" method="get">
姓名：<input name="name" type="text" size="22" /> <br><br>
EMAIL：<input name="email" type="text" size="22" /><br>
年纪：
<input name="age" type="radio" value="小于18" checked=checked/>小于18
<input name="age" type="radio" value="18-25" />18-25
<input name="age" type="radio" value="26-40 " />26-40
<input name="age" type="radio" value="大于40" />大于40 <br><br>
编程时间:
<select name="time">
<option value="0-5月">0-5月
<option value="6-12月">6-12月
</select> <br><br>
使用的操作系统：
<select name="system" size=6 multiple>
<option value="Win XP">Win XP
<option value="Win 2000/2003">Win 2000/2003
<option value="Linux">Linux
<option value="FreeBSD">FreeBSD
<option value="Mac OS">Mac OS
<option value="other">other
</select> <br><br>
使用的编程语言：
<input name="language" type="checkbox" value="C" />C
<input name="language" type="checkbox" value="C++" />C++
<input name="language" type="checkbox" value="C#" />C#
<input name="language" type="checkbox" value="PYTHON" />PYTHON
<input name="language" type="checkbox" value="JAVA" />JAVA
<input name="language" type="checkbox" value="VB" />VB
<input name="language" type="checkbox" value="DEPHI" />DEPHI
<br><br>
建议：
<textarea name="device" cols="30" rows="4">
</textarea> <br><br>
<input name="tj" type="submit" value="提交" />
<input name="cz" type="reset" value="重置" />
</body>
</html>6.右击Tomcat7.x——>Add Deployment——>添加testone项目
7.打开web.xml文件查看代码可以将/servlet删除哦
8.下面我们需要在servletone.java中获取页面中表单数据
*我们希望doGet和doPost完成同样的功能便在doGet中调用doPost方法
*在doPost方法中获得表单数据
下面是servletone.java中完整代码
package sun.hebtu;
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 servletone extends HttpServlet {
/**
* Constructor of the object.
*/
public servletone() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//现在我们希望doGet和doPost实现一样的功能，在doGet中调用doPost方法。
doPost(request, response);
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//进行字符编码及输出格式的设置
request.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
//得到表单中的每个值
String name=request.getParameter("name");
String email=request.getParameter("email");
String age=request.getParameter("age");
String time=request.getParameter("time");
String system1=request.getParameter("system");
String language1=request.getParameter("language");
String device=request.getParameter("device");
//输出格式及内容
out.println("姓名："+name+"<br>");
out.println("EMAIL："+email+"<br>");
out.println("年纪："+age+"<br>");
out.println("编程时间："+time+"<br>");
out.println("使用的操作系统：");
String itemName[]=request.getParameterValues("system");
if(itemName==null){
out.println("");
}
else{
for(int i=0;i<itemName.length;i++){
out.print(" "+itemName[i]);
}
}
out.println("<br>");
out.println("使用的编程语言："); //
String itemName2[]=request.getParameterValues("language");
if(itemName2==null){
out.println("");
}
else{
for(int i=0;i<itemName2.length;i++){
out.print(" "+itemName2[i]);
}
}
out.println("<br>");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}9.现在可以打开ie浏览器输入http://localhost:8081/testone/即可查看表单页面
进行信息输入后点击确定按钮完成跳转
10.现在功能已经完成，你运行成功了么
注意：如果在运行过程中出现乱码，请检查字符编码，具体查看内容请看另一篇博客：