简单WEB登录页面代码实现
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简单WEB登录页面代码实现
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longin.html：登錄頁面，此處action引用**/**類型的地址，JSP可以用${ pageContext.request.contextPath }/LS
LoginServlet.java用戶和前臺(tái)WEB頁面數(shù)據(jù)進(jìn)行交互
package it.tongyou.web.servlet;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 {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {//亂碼解決response.setContentType("text/html;charset-utf-8");//獲取頁面?zhèn)鬟^來的數(shù)據(jù)String username=request.getParameter("username");String password=request.getParameter("password");//判斷賬號(hào)密碼if(("xm").equals(username) && ("123").equals(password)){response.sendRedirect("/lianxiti/success.html");}else{response.sendRedirect("/liantixi/longin.html");}}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doGet(request, response);} }web.xml應(yīng)用路徑配置/LS和longin.html引用地址一定要一樣，因?yàn)榇颂幮枰裌EB頁面的數(shù)據(jù)提交到對(duì)應(yīng)的servlet中；
<?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"><!-- 頁面WEB跳轉(zhuǎn)servlet層 --><servlet><servlet-name>LoginServlet</servlet-name><servlet-class>it.tongyou.web.servlet.LoginServlet</servlet-class></servlet><servlet-mapping><servlet-name>LoginServlet</servlet-name><url-pattern>/LS</url-pattern></servlet-mapping><!-- 打開項(xiàng)目優(yōu)先展示頁面 --> <welcome-file-list><welcome-file>longin.html</welcome-file></welcome-file-list> </web-app>成功后跳到success.html頁面
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