Java 屏幕上显示参数:HTTP状态404-未找到
我想在屏幕上显示参数,url如下: 但结果是“HTTP状态404-未找到” 以下是servlet:Java 屏幕上显示参数:HTTP状态404-未找到,java,jsp,Java,Jsp,我想在屏幕上显示参数,url如下: 但结果是“HTTP状态404-未找到” 以下是servlet: package controller; import java.io.PrintWriter; import java.io.IOException; import javax.servlet.*; import javax.servlet.http.*; public class HelloWorldServlet extends HttpServlet { private st
package controller;
import java.io.PrintWriter;
import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.*;
public class HelloWorldServlet extends HttpServlet {
private static final String DEFNAME ="World";
protected void generateResponse
(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
String name = request.getParameter("name");
if( name == null || name.length() == 0 )
name = DEFNAME;
out.println("Hello, "+name+"!");
out.close();
}
protected void doGet (HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
generateResponse(request, response);
}
protected void doPost (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
generateResponse(request, response); }
}
jsp页面:
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<%! private static final String DEFNAME = "World"; %>
<html>
<head>
<title>JSP Page</title>
</head>
<body>
<%
String name = request.getParameter("name");
if( name == null || name.length() == 0 )
name = DEFNAME;
%>
<h2>Hello, <%= name %> !</h2>
</body>
</html>
JSP页面
你好
xml:
<servlet>
<servlet-name>HelloWorldServlet</servlet-name>
<servlet-class>controller.HelloWorldServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>HelloWorldServlet</servlet-name>
<url-pattern>/hello.view</url-pattern>
</servlet-mapping>
HelloWorldServlet
controller.HelloWorldServlet
1.
HelloWorldServlet
/你好,我是维尤
这是您的第一个web应用程序吗?jsp文件的名称是什么?你知道如何重定向/转发到jsp吗?这个问题对我很有帮助,我可以解决它。我将servlet名称转换为url中的项目名称。这是您的第一个web应用程序吗?jsp文件的名称是什么?你知道如何重定向/转发到jsp吗?这个问题对我很有帮助,我可以解决它。我将servlet名称交换为url中的项目名称。