Servlet简单登录

清疚 2022-03-16 05:10 252阅读 0赞

src/Controller/UserLoginCOntroller下
    package controller;
    
    import java.io.IOException;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    
    import entity.User;
    import service.UserService;
    import service.impl.UserServiceImpl;
    
    public class UserLoginController extends HttpServlet {
    	/**
    	 * 用户登录控制层
    	 */
    	private static final long serialVersionUID = 3895967245210592578L;
    	/**
    	 * @see HttpServlet#doGet(HttpServletRequest request,HttpServletResponse
    	 *      response)
    	 */
    	protected void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
    			doPost(request, response);
    	}
    	/**
    	 * @see HttpServlet#doGPost(HttpServletRequest request,HttpServletResponse
    	 *      response)
    	 */
    	protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
    		String halfgod=getInitParameter("halfgod");
    		UserService userService=new UserServiceImpl();
    		String username=request.getParameter("username");
    		String password=request.getParameter("password");
    		User user=new User(username,password);
    		User info=userService.getUser();
    		HttpSession session=request.getSession();
    		if(info==null) {
    			session.setAttribute("info", info);
    			response.sendRedirect("./info.jsp");
    		}else {
    			response.sendRedirect("./index.jsp");
    		}
    	}
    }
    项目下WEB-INF/web.xml
    <servlet>
      	<servlet-name>login</servlet-name>
      	<servlet-class>controller.UserLoginController</servlet-class>
      	<init-param>
      		<param-name>jdmd</param-name>
      		<param-value>cmd</param-value>
      	</init-param>
      </servlet>
      <servlet-mapping>
      	<servlet-name>login</servlet-name>
      	<url-pattern>/login</url-pattern>
      </servlet-mapping>