【笔记】HttpServlet学习笔记

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前言

Servlet的继承关系
Servlet（父）->GenericServlet（子）->HttpServlet（孙）
通常开发B/S架构的应用只需要继承HttpServlet即可

创建一个自定义的Servlet

  • 创建一个自定义的Servlet，继承HttpServlet方法

@WebServlet()

urlPatterns = "/"：配置请求路径
doGet()：处理Get请求
doPost()：处理Post请求

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@WebServlet(urlPatterns = "/")
public class MyServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doGet(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doPost(req, resp);
    }
}

省略

  • 通常情况下，Get请求和Post请求的处理方式相同，此时可以将Post请求通过doGet处理即可
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@WebServlet(urlPatterns = "/")
public class MyServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doGet(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doPost(req, resp); 
        this.doGet(req, resp);
    }
}

完成

参考文献

哔哩哔哩——黑马程序员