使用session防止重复提交
一、表单重复提交的常见应用场景 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <!DOCTYPE HTML> <html> <head> <title>Form表单</title> </head> <body> <form action="${pageContext.request.contextPath}/servlet/DoFormServlet" method="post"> 用户名：<input type="text" name="username"> <input type="submit" value="提交" id="submit"> </form> </body> </html> form表单提交到DoFormServlet进行处理 package xdp.gacl.session; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;