Servlet类的基础入门

Servlet类的基础入门

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;






@WebServlet("/login")
public class servletTest extends HttpServlet {

    
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //HttpServletRequest和HttpServletResponse都是接口，tomcat作为servlet的容器，浏览器先发送http请求到tomcat，然后tomcat创建
        // HttpServletRequest的实现类，将http请求封装进去，然后在传递给servlet，然后调用service方法。
        //get请求方法获取参数的方式，在HttpServletRequest中已经封装好了
        
        req.setCharacterEncoding("UTF-8");
        System.out.println("get请求");

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//        super.doPut(req, resp);
        
        System.out.println("post请求");
    }
}

一个方便的流对拷工具，commons-io。