JSP代码：
<%@ page language=\"java\" import=\"java.util.*\" pageEncoding=\"utf-8\"%>
<!DOCTYPE html>
<html>
<head>
< charset=\"utf-8\">
< >菜鸟教程(runoob.com)</ >
</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. 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！
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