我正面临着基于Servlets在Java EE中编写Web应用程序的问题。一切都还可以,但我无法弄清楚如何正确地将js
和css
个文件附加到我的html
页面。我已经在网上阅读了一些关于此问题的答案和帖子,我不想编写自己的servlet来执行此操作,因为据我所知Tomcat提供DefaultServlet
并且它可以满足我的需求。现在,我尝试编写这个类的实现,在这里:
package xx.xx.xx;
import java.io.File;
import java.io.IOException;
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.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
import org.apache.catalina.servlets.DefaultServlet;
@WebServlet(urlPatterns={"/js/*","/css/*","/libs/*"})
public class StaticContent extends DefaultServlet {
public StaticContent() {
super();
}
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
File f = new File(StaticContent.class.getProtectionDomain().getCodeSource().getLocation().getPath()+"../css/global.css");
System.out.println("_____HERE " + request.getRequestURL() + " | " + f.exists());
super.doGet(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
throw new UnsupportedOperationException();
}
}
我不明白。它仍然无法正常工作。 java文件系统识别它并在true
上返回file.exists()
但服务器没有。当我尝试从浏览器访问它时,它也会失败404
。任何想法我应该在这做什么?资产文件紧挨着html
中的WEB-INF
。
答案 0 :(得分:0)
好的,我在这里工作的是我的doGet
方法:
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String arr[] = request.getRequestURL().toString().split("/");
String file = arr[arr.length-1];
String folder = arr[arr.length-2];
request.getRequestDispatcher("/WEB-INF/"+folder+"/"+file).forward(request, response);
}