JavaWeb学习之HttpServletRequest 和 HttpServletResponse

如果每次都要实现Servlet接口，并重写其方法，个人感觉会很累。

Java是不是提供别的方式呢？

在选中ServletCtrl+T

HttpServlet ：用于处理http的请求，而http的请求也就两种（get、post)

继承HttpServlet 复写doGet 和 doPost

 1 public class HellowHttpServlet extends HttpServlet {
 2     @Override
 3     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
 4          6         System.out.println("get===");
 7     }
 8     
 9     @Override
10     protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
11         13         System.out.println("post---");
14     }
15 }

 配置Servlet

    <servlet>
        <servlet-name>HellowHttpServlet</servlet-name>
        <servlet-class>com.marw.servlet.HellowHttpServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>HellowHttpServlet</servlet-name>
        <url-pattern>/HellowHttpServlet</url-pattern>
    </servlet-mapping>

Post请求方式

1 <form action="HellowHttpServlet" method="post">
2 <input type="submit" value="提交">
3 </form>

简单的get和post请求

如何根据请求做出对应的响应？

HttpServletRequest对象对应的http的请求信息

HttpServletResponse对象对应的http的响应信息