package context;

import java.io.IOException;

import javax.servlet.ServletContext;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

/**

 * 得到web应用路径

 * @author Administrator

 *

 */

public class ContextDemo1 extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        //1.得到ServletContext对象

//        ServletContext context = this.getServletConfig().getServletContext();

        ServletContext context = this.getServletContext(); // 推荐使用

        //2.得到web应用路径  /day10

        /*

         * web应用路径：

         *     部署到tomcat服务器上运行的web应用名称

         */

        String contextPath = context.getContextPath();

        System.out.println(contextPath);

        /*

         * 案例：应用到请求重定向

         */

        response.sendRedirect(contextPath + "/index.jsp");

    }

}