1.表单登陆跳转

 
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Arrays;
 
public class Login extends HelloServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String username=req.getParameter("username");
        String pw=req.getParameter("pw");
        String[] hobby=req.getParameterValues("hobbys");
        System.out.println("========================");
        //接收中文乱码
        System.out.println(username);
        System.out.println(pw);
        System.out.println(Arrays.toString(hobby));
        System.out.println("========================");
 
        System.out.println(req.getContextPath());
        //请求转发  request.getContextPath() 请求地址
        req.getRequestDispatcher("/succes.jsp").forward(req, resp);
 
        resp.setCharacterEncoding("utf-8");
    }
 
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    


Succes!!

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    


Login



  

    USERNAME:

    PASSWORD:

    HOBBY:
    Music
    Python
    Idea
    Movie