受保护方法允许的访问修饰符是什么

Question

    package servlet;

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;

/**
 * Servlet implementation class SampleServlet
 */
@WebServlet("/SampleServlet")
public class SampleServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public SampleServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        response.getWriter().append("Served at: ").append(request.getContextPath());
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);``
    }

}

在 eclipse 上默认生成的 servlet 代码中，我发现 doGet 和 doPost 方法具有受保护的访问权限。

doXXX 方法有哪些不同的访问修饰符？
它将如何影响 class 的行为？

Answer 1

您不能对继承方法的访问进行更严格的限制（有关更多详细信息，您可以查看 oracle documentation）。

它不会影响 servlet 的行为，因为它只是从其超级 class 服务方法（请参阅 source code）调用的分派方法。

受保护方法允许的访问修饰符是什么

What are the access modifiers allowed for protected methods

java

protected

access-modifiers