在Eclipse中找不到Java Servlet错误404

我在Ubuntu 14.04上使用Eclipse 4.3 kepler并使用Apache tomcat 7，我已经在项目中成功创建了.jsp和.html文件，但是我无法运行servlet，我在library中添加了所有jar文件.我已经阅读了有关此错误404的每篇文章，当我启动以下servlet

I am using Eclipse 4.3 kepler on Ubuntu 14.04 and using Apache tomcat 7 , I have successfully created .jsp and .html files in my project but I cannot Run a servlet, I have all jar files added in library . I have read every article on this error 404 ,which I am getting when I launch the following servlet

package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;




@WebServlet("/taxProcessor")
public class taxProcessor extends HttpServlet {
private static final long serialVersionUID = 1L;


/**
 * @see HttpServlet#HttpServlet()
 */
public taxProcessor() {
    super();
    // TODO Auto-generated constructor stub
}

/**
 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
 */
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    String s=request.getParameter("t1");
    int i=Integer.parseInt(s);
    String s1=request.getParameter("t2");
    int a=Integer.parseInt(s1);
    int t=0;
    if(i>=500000)
    {
        t=i*(30/100);
    }else if(i>=300000)
    {
        t=i*(20/100);
    }else if(i>=200000)
    {
        t=i*(10/100);
    }
    if(a>=60)
    {
        t=t-(i*(10/100));
    }
PrintWriter out=response.getWriter();
out.println("Thank you for Visiting");
out.println("Your Tax Laibality is"+t+"\n");
out.close();
}

/**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
 */
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
}

}

我的web.xml文件是

my web.xml file is

我所得到的就是这个