2020/10/28
一.在servlet层用于将前端页面
package Servlet; import java.util.List; import java.io.IOException; 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 javax.servlet.http.HttpSession; import Dao.Dao; import entity.student; @WebServlet("/Servlet") public class Servlet extends HttpServlet { private static final long serialVersionUID = 1L; public Servlet() { super(); } protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { req.setCharacterEncoding("utf-8"); String method = req.getParameter("method"); if ("add".equals(method)) { add(req, resp); } if ("login".equals(method)) { login(req, resp); } } private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{ req.setCharacterEncoding("utf-8"); String sid = req.getParameter("sid"); String sname = req.getParameter("sname"); String ssex = req.getParameter("ssex"); String sclass = req.getParameter("sclass"); String szy = req.getParameter("szy"); student student=new student(sid,sname,ssex,sclass,szy); Dao dao =new Dao(); boolean f=dao.add(student); System.out.println(f); if(f) { req.setAttribute("message", "添加成功!"); req.getRequestDispatcher("face.jsp").forward(req,resp); } else { req.setAttribute("message", "添加失败!"); req.getRequestDispatcher("add.jsp").forward(req,resp); } } }
在protected void serviceif中判断下,后面写函数这个方法
这里写了调用add的servelt
二.对里面的有些结构不太清楚
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