JSP与Servlet
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2022-04-30 15:51:41
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JSP代码：
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body>
<p>用户名</p>
<form action="../Login" method="GET">
<input type="text" name="username">
<input type="submit" value="提交">
</form>
<a href="../Login">相对路径访问Servlet</a>
</body>
</html>
Servlet代码：
package cn;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class Login
*/
@WebServlet(name = "LoginServlet", urlPatterns = { "/LoginServlet" })
public class Login extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public Login() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
//设置语言编码
response.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
//获得前台输入的账号密码
String username = request.getParameter("username");
//判断前台输入的账号密码是否正确
if("zhangsan".equals(username)){
response.getWriter().print("<h1><font color='red'> 登录成功！</font></h1>");
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
web.xml文件配置Servlet代码段：
<servlet>
<servlet-name>Login</servlet-name>
<servlet-class>cn.Login</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Login</servlet-name>
<url-pattern>/Login</url-pattern>
</servlet-mapping>这样就可以运行啦！