Servlet获取类路径下的资源

示例程序：

 package cn.yzu;
 import java.io.IOException;
 import java.io.InputStream;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import org.apache.commons.io.IOUtils;
 public class AServlet extends HttpServlet {

     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
         ClassLoader loader=this.getClass().getClassLoader();
         //相对于TOMCAT中classes目录
         InputStream stream=loader.getResourceAsStream("cn/yzu/A");
         InputStream stream2=loader.getResourceAsStream("../../index.jsp");
         //IO小工具，将输入流转换成字符串
         String s=IOUtils.toString(stream);
         System.out.println(s);
         System.out.println("---------------------------------------------------");
         System.out.println(IOUtils.toString(stream2));
     }
     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
         doGet(request, response);
     }
 }

运行结果：

注：IO小工具所用jar包：(APACHE提供，可到官网下载)