jsp+servlet

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package login;

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 loginServlet extends HttpServlet {

/**
* Constructor of the object.
*/
public loginServlet() {
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 {

  response.setContentType("text/html");
  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>");
  out.print("    This is ");
  out.print(this.getClass());
  out.println(", using the GET method");
  out.println(" </BODY>");
  out.println("</HTML>");
  out.flush();
  out.close();
}

/**
* 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 {

  response.setContentType("text/html;charset=GB2312");//设置响应的MIME类型。
  java.io.PrintWriter out = response.getWriter();

  String type=request.getParameter("typeId");
  if (type.trim().equals("login")) {
  String name=request.getParameter("name");//获取视图里的name
  String pas=request.getParameter("pas");//获取视图里的password
  model newModel=new model();//调用模型
  newModel.setName(name);
  newModel.setPas(pas);
  if(newModel.login())
  {
  out.print("script Lanuage='JavaScript'>window.alert('登录成功！')</script>");
  }
  else {
  out.print("script Lanuage='JavaScript'>window.alert('登录失败！')</script>");
  }
  }
}

/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}

}

/**
* 2010-4-19
* model.java
* author:Xiangzi
*/
package login;

public class model {

private String name=null;
private String pas=null;

public void setName(String name)
{
  this.name=name;
}

public String getName() {
  return name;
}

public void setPas(String pas)
{
  this.pas=pas;
}

public String getPas() {
  return pas;
}

public boolean login()
{
  if ((name.trim().equals("admin"))&&(pas.trim().equals("1234"))) {
   return true;
  }
  else {
   return false;
  }
}
}

index.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>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">

</head>

</script>
<body>
    <form action="loginServlet" method="post">
  <div>
  Name <input type="text" name="name"/><br/>
  Password <input type="text" name="pas"/><br/>
  <input type="submit" value="Login"/>
  <input type="hidden" value="login" name="typeId"/>
  </div>
  </form>
</body>
</html>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
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">
<display-name></display-name>

<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>

<servlet-name>loginServlet</servlet-name>
<servlet-class>login.loginServlet</servlet-class>

</servlet>

<servlet-mapping>
<servlet-name>loginServlet</servlet-name>
<url-pattern>/loginServlet</url-pattern>
</servlet-mapping>

<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

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