java中获取文件的服务器路径

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//获取文件的服务器路径
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;

@WebServlet("/ServletContextDemo5")
public class ServletContextDemo5 extends HttpServlet { 
   
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 
   

        //2.通过HttpServlet获取
        ServletContext context = this.getServletContext();
        //获取文件的服务器路径
        String realPath = context.getRealPath("/b.txt");//web目录下的资源访问
        System.out.println(realPath);//F:\Ideawork\day03\out\artifacts\day03_war_exploded\b.txt
        //File file = new File(realPath);
        String realPath1 = context.getRealPath("/WEB-INF/c.txt");//WEB-INF目录下的资源访问
        System.out.println(realPath1);
        String realPath2 = context.getRealPath("/WEB-INF/classes/a.txt");//src目录下的资源访问
        System.out.println(realPath2);


    }

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