服务器路径的获取

方法：String getRealPath(String path)

@Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //1.context对象的获取
        ServletContext servletContext = this.getServletContext();

        //获取文件的服务器路径
           
        //src目录下资源访问
        String realPath4 = servletContext.getRealPath("/WEB-INF/classes/a.txt");
        //web目录下资源访问
        String realPath2 = servletContext.getRealPath("/b.txt");
        //WEB-INF目录下资源访问
        String realPath3 = servletContext.getRealPath("/WEB-INF/c.txt");
        
        System.out.println(realPath4);
        System.out.println(realPath2);
        System.out.println(realPath3);

    }