我试图使用HTTPServletRequest将参数从servlet传递到JSP,但没有成功。有人能解释我哪里错了?
这里是servlet:
HelloServlet
package net.codejava;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
* Servlet implementation class HelloServlet
*/
public class HelloServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
request.setAttribute("name", "name1");
request.setAttribute("surname", "surname1");
request.getRequestDispatcher("index.jsp").forward(request, response);
}
}
这里是JSP:
JSP(“HelloServlet/index.JSP”)
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>HelloWorld Index</title>
</head>
<body>
Welcome <%= request.getAttribute("name") %>
</body>
</html>
和web.xml:
web.xml
<web-app xmlns="http://java.sun.com/xml/ns/javaee" version="2.5">
<servlet>
<servlet-name>helloservlet</servlet-name>
<servlet-class>net.codejava.HelloServlet</servlet-class>
<jsp-file>/HelloServlet/index.jsp</jsp-file>
</servlet>
<servlet-mapping>
<servlet-name>helloservlet</servlet-name>
<url-pattern>/HelloServlet</url-pattern>
</servlet-mapping>
</web-app>
结果
Welcome null
