response 重定向
阿新 • • 發佈:2020-10-05
利用重定向實現兩個頁面的跳轉(流程)
1. index.jsp
<html> <body> <h2>Hello World!</h2> //pageContext.request.getContextPath()獲取提交請求的當前地址,此處是當前地/login <form action="${pageContext.request.getContextPath()}/login" method="get"> 使用者名稱:<input type="text" name="username"><br> 密 碼:<input type="text" name="password"><br> <input type="submit"> </form> </body> </html>
2.web.xml(在此處servlet中找到獲取提交請求的當前地址,此處是當前地/login)
<servlet> <servlet-name>login</servlet-name> <servlet-class>com.king.servlet.RequestTest</servlet-class> </servlet> <servlet-mapping> <servlet-name>login</servlet-name> <url-pattern>/login</url-pattern> </servlet-mapping>
3.RequestTest (最後走到此處,在實現類中實現重定向)
package com.king.servlet; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; public class RequestTest extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { //處理請求 String username = req.getParameter("username"); String password= req.getParameter("password"); System.out.println(username+":"+password); //重定向時候一定要注意,路徑問題(404路徑問題,500程式碼錯誤) resp.sendRedirect("/response_war/success.jsp"); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); } }