Question

我正在Eclipse中使用servlet和JSP编写一个非常简单的Web应用程序。服务器是Tomcat v7.0。 Java版本是1.8.0_60。下面是我的servlet代码，写在名为DesignGoal.java

的文件中

package com.example;

import java.io.IOException;
import java.util.ArrayList;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(
    urlPatterns = "/DesignGoal",
    initParams = {
            @WebInitParam(name="text",value=" extreme knitting " )
    }
)
public class DesignGoal extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        RequestDispatcher view = getServletContext().getRequestDispatcher("/designGoal.jsp");
        view.forward(request, response);
    }

}

这是我的档案designGoal.jsp：

<%@page import="java.util.ArrayList"%>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>

<!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=ISO-8859-1">
    <title>Insert title here</title>
  </head>

  <body>
    Hello!
  </body>
</html>

但是当我运行文件DesignGoal.java时，我收到以下错误：

java.lang.IllegalArgumentException: Path designGoal.jsp does not start with a "/" character

有人可以告诉我为什么我会收到此错误，即使getRequestDispatcher()中的字符串以/开头，而我添加的路径也是相对于项目的根目录。

Answer 1

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
RequestDispatcher view = getServletContext().getRequestDispatcher("designGoal.jsp");<!--dont add '/' here   --!>
view.forward(request, response);

}

不要添加＆＃34; /＆＃34;在调度员

Answer 2

如果您的designGoal.jsp位于根目录WebContent

中

String nextJSP = "/searchResults.jsp";
RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(nextJSP);
dispatcher.forward(request, response);

如果它在WebContent / WEB-INF文件夹中

String nextJSP = "/WEB-INF/searchResults.jsp";
RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(nextJSP);
dispatcher.forward(request, response);

java.lang.IllegalArgumentException：Path designGoal.jsp不以“/”字符开头

2 个答案: