vip21-javaweb/day09/src/com/lovecoding/request/Demo1Servlet.java

package com.lovecoding.request;

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.IOException;

@WebServlet("/demo1Servlet")
public class Demo1Servlet extends HttpServlet {
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        /**
         * demo1Servlet?name=zhangsan
         * 获取指定参数, 适用于 GET POST
         */
        //String name = req.getParameter("name");

        /**
         * 它默认就是编码是 ISO-8859-1
         * 这个码表没有中文, 所以传递中文会乱码
         */
        req.setCharacterEncoding("utf-8");
        String name = req.getParameter("name");
        System.out.println( name );

        /**
         * 打印浏览器agent
         */
        String header = req.getHeader("User-Agent");
        System.out.println( header );



    }
}