|
package Controller; import java.io.IOException; import javax.servlet.RequestDispatcher; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; @WebServlet("/FirstServlet") public class LoginServlet extends HttpServlet { private static final long serialVersionUID = 1L; //首先被创建 public LoginServlet() { super(); } //类对象创建之后创建 public void init(ServletConfig config) throws ServletException{ super.init(config); } //可以统一处理Get Post请求，与Post Get请求不可同时存在 public void service(HttpServletRequest request, HttpServletResponse response){ } //处理Get请求 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws Ser vletException, IOException { //转发到登录页面 RequestDispatcher rd = request.getRequestDispatcher("/WEB-INF/template/login.jsp"); rd.forward(request, response); } //处理Post请求 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws Se rvletException, IOException { //取得初期化参数 ServletConfig config = getServletConfig(); str_Status = config.getInitParameter("status"); RequestDispatcher rd = request.getRequestDispatcher("/WEB-INF/template/login.jsp"); request.setCharacterEncoding("utf-8"); String name = request.getParameter("name"); String password = request.getParameter("password"); if(name.equals("路西") && password.equals("123456")){ HttpSession session = request.getSession(true); session.setAttribute("username",name); rd = request.getRequestDispatcher("/WEB-INF/template/welcome.jsp"); }else{ request.setAttribute("err", "用户名、密码错误"); } rd.forward(request, response); // request.setCharacterEncoding("utf-8"); // response.setContentType("text/html;charSet=utf-8"); // String name = request.getParameter("name"); // String age = request.getParameter("password"); // PrintStream out = new PrintStream(response.getOutputStream()); // out.println("<html>"); // out.println("<head>"); // out.println("<title>"+str_Status+"</title>"); // out.println("</head>"); // out.println("<body>"); // out.println("用户名："+name); // out.println("密码："+age); // out.println("</html>"); } } web.xml文件 <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www./2001/XMLSchema-instance" xmlns="http://java./xml/ns/javaee" xsi:schemaLocation="http://java./xml/ns/javaee http://java./xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <servlet> <servlet-name>firstServlet</servlet-name> <servlet-class>Controller.LoginServlet</servlet-class> <!-- 赋初期化参数 --> <init-param> <param-name>status</param-name> <param-value>login</param-value> </init-param> <!- -值越小，优先级越高 --> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>firstServlet</servlet-name> <url-pattern>/login</url-pattern> </servlet-mapping> </web-app>
|
|
|
来自： 擎天猪mpnlajkd > 《Servlet》
