servlet的doget和dopost示例
package myservlet;
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;
/**
* Servlet implementation class MyServlet
*/
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* Default constructor.
*/
public LoginServlet() {
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
response.setContentType("text/html;charset=gb2312");
response.setCharacterEncoding("gb2312");
PrintWriter out=response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title>登录窗口</title>");
out.println("</head>");
out.println("<body>");
out.println("<form id=\"form1\" name=\"form1\" method=\"post\" action=\"login\">");
out.println(" <p align=\"center\">");
out.println(" <label>用户");
out.println("<input type=\"text\" name=\"username\" id=\"username\" />");
out.println("</label>");
out.println("</p>");
out.println("<p align=\"center\">");
out.println("<label>密码");
out.println("<input type=\"text\" name=\"password\" id=\"password\" />");
out.println("</label>");
out.println("</p>");
out.println("<p align=\"center\">");
out.println("<label>");
out.println("<input type=\"submit\" name=\"submit\" id=\"submit\" value=\"提交\" /> ");
out.println("</label><label><input type=\"reset\" name=\"reset\" id=\"reset\" value=\"重置\" />");
out.println("</label>");
out.println("</p>");
out.println("</form>");
out.println("</body>");
out.println("</html>");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.setContentType("text/html;charset=gb2312");
response.setCharacterEncoding("gb2312");
request.setCharacterEncoding("gb2312");
PrintWriter out=response.getWriter();
out.println("<html>");
out.println("<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Transitional//EN' 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>");
out.println("<html xmlns='http://www.w3.org/1999/xhtml'>");
out.println("<HEAD><TITLE>用户信息</TITLE></HEAD>");
out.println("<h1>你的信息如下：</h1>");
out.println("<BODY>");
out.println("<br>用户："+request.getParameter("username")+"<br>");
out.println("<br>密码："+request.getParameter("password")+"<br>");
out.println("</BODY>");
out.println("</html>");
}
}
web.xml内容如下：
<?xml version="1.0" encoding="UTF-8"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<display-name>用户登录实例</display-name>
<description>
用户登录实例
</description>
<servlet>
<servlet-name>userlogin</servlet-name>
<servlet-class>myservlet.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>userlogin</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>
</web-app>