package servlet;
import bean.Student;
import dao.StudentDaoImpl;
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;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
@WebServlet("/addStudent")
public class AddServlet extends HttpServlet {
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
Student student = new Student();
int studentID = Integer.parseInt(req.getParameter("studentID"));
String name = req.getParameter("name");
int age = Integer.parseInt(req.getParameter("age"));
String sex = req.getParameter("radio");
Date birthday = null;
// String 类型按照 yyyy-MM-dd 的格式转换为 java.util.Date 类
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
try {
birthday = simpleDateFormat.parse(req.getParameter("birthday"));
} catch (ParseException e) {
e.printStackTrace();
}
package servlet;
import bean.Student;
import dao.StudentDaoImpl;
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("/editStudent")
public class EditServlet extends HttpServlet {
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
int id = Integer.parseInt(req.getParameter("id"));
Student student = new StudentDaoImpl().get(id);
req.setAttribute("student", student);
req.getRequestDispatcher("/editStudent.jsp").forward(req, resp);
}
}
其中一个功能 ,想知道是怎么实现信息的增加,什么接口啊类啊啥的。每一行讲的都是啥