一：Servlet 处理请求也是通过request来进行处理，类似于python。
get请求通过request.getparameter("key");key为前端传过来的key，get以 key=val形式进行传递。
响应以response.getWrite().print("return String")
1 package ser_Test; 2 3 import javax.servlet.ServletException; 4 import javax.servlet.http.HttpServlet; 5 import javax.servlet.http.HttpServletRequest; 6 import javax.servlet.http.HttpServletResponse; 7 import java.io.IOException; 8 9 public class Hello_Demo extends HttpServlet{ 10 @Override 11 protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { 12 System.out.println("请求已经收到........."); 13 //接收前端传递参数,方法：req.getparameter(); 14 String user=req.getParameter("username"); 15 String pwd=req.getParameter("pwd"); 16 System.out.println("data:"+user+pwd); 17 //返回数据，方法resp,getWrite().prin("返回的字符串。) 18 resp.getWriter().print("data:"+user+pwd); 19 20 21 } 22 23 @Override 24 protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { 25 26 } 27 }
