从Servlet访问Tomcat上下文路径

import java.io.IOException;
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("/GetContextPath")
public class GetContextPathServlet extends HttpServlet {

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 获取ServletContext对象
        ServletContext context = getServletContext();
        // 获取上下文路径
        String contextPath = context.getContextPath();
        // 输出上下文路径
        response.getWriter().write("上下文路径: " + contextPath);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }
}