servlet得到web應用路徑

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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應用路徑 * @author Administrator * */public class ContextDemo1 extends HttpServlet {    public void doGet(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        //1.得到ServletContext對象//        ServletContext context = this.getServletConfig().getServletContext();        ServletContext context = this.getServletContext(); // 推薦使用                //2.得到web應用路徑  /day10        /*         * web應用路徑：         *     部署到tomcat伺服器上啟動並執行web應用程式名稱         */        String contextPath = context.getContextPath();        System.out.println(contextPath);                /*         * 案例：應用到請求重新導向         */        response.sendRedirect(contextPath + "/index.jsp");    }}

 

servlet得到web應用路徑