當前位置：首頁 > 前端技术 > javascript >内容正文

javascript

JSP RequestDispatcher servlet之间传参

發布時間：2025/5/22 javascript 45 豆豆

生活随笔收集整理的這篇文章主要介紹了 JSP RequestDispatcher servlet之间传参小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

介紹

RequestDispatcher可以向參數從一個seevlet傳給另一個
大佬路過，小白寫出來僅給另一個小白參考

目錄結構

web.xml

<?xml version="1.0" encoding="UTF-8"?> <web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"><servlet><servlet-name>CalculatorServlet</servlet-name><servlet-class>CalculatorServlet</servlet-class></servlet><servlet><servlet-name>DisplayServlet</servlet-name><servlet-class>DisplayServlet</servlet-class></servlet><servlet-mapping><servlet-name>CalculatorServlet</servlet-name><url-pattern>/CalculatorServlet</url-pattern></servlet-mapping><servlet-mapping><servlet-name>DisplayServlet</servlet-name><url-pattern>/DisplayServlet</url-pattern></servlet-mapping><session-config><session-timeout>30</session-timeout></session-config> </web-app>

index.html

提交2個參數到 CalculatorServlet.java

<!DOCTYPE html> <html><head><title>TODO supply a title</title><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"></head><body><form name="frm" method="get" action="CalculatorServlet"><p align="center">Calculation form</p><table><tr><td><b>輸入第一個數字:</b></td><td><input type="text" name="number1" size="20"></td></tr><tr><td><b>輸入第二個數字:</b></td><td><input type="text" name="number2" size="20"></td></tr><tr align="center"><td colspan=2><input type="Submit" value="加" name="b1"></td></tr></table></form></body> </html>

CalculatorServlet.java

接收index出來的2個參數，計算后發給 DisplayServlet.java

import java.io.IOException; import java.io.PrintWriter; import javax.servlet.RequestDispatcher; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;public class CalculatorServlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {//獲取兩個參數int num1 = Integer.parseInt(request.getParameter("number1"));int num2 = Integer.parseInt(request.getParameter("number2"));// 相加int result = num1 + num2;// 將結果放到屬性 result中，然后傳給/DisplayServletrequest.setAttribute("result", new Integer(result));ServletContext contx = getServletConfig().getServletContext();RequestDispatcher reqDispatcher = contx.getRequestDispatcher("/DisplayServlet");reqDispatcher.forward(request, response);} }

DisplayServlet.java

接收CalculatorServlet.java 傳的參數，并且輸出

總結

以上是生活随笔為你收集整理的JSP RequestDispatcher servlet之间传参的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。