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)