addStudent.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="AddStudentServlet" method="post">
<pre>
姓名:<input type='text' name='sname' />
性别:<input type='text' name='sex' />
身份证:<input type='text' name='card_id' />
年龄:<input type='text' name='age' />
班主任:<input type='text' name='tid' />
<input type='submit' name='sub' value='添加' />
</pre>
</form>
</body>
</html>
showStudentList.jsp
<%@page import="java.util.List,com.yyy.po.Student"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<table border="1" width=500>
<%
List<Student> studentList= (List<Student>)request.getAttribute("list");
for(Student student:studentList)
{
%>
<tr>
<td><%= student.getSid() %></td>
<td><%= student.getSname() %></td>
<td><%= student.getSex() %></td>
<td><%= student.getCard_id() %></td>
</tr>
<%
}
%>
</table>
<a href="addStudent.jsp">添加</a>
</body>
</html>
AddStudentServlet
package com.yyy.servlet;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
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 com.yyy.util.DbHelper;
@WebServlet("/AddStudentServlet")
public class AddStudentServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public AddStudentServlet() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
String sname=request.getParameter("sname");
String sex=request.getParameter("sex");
String card_id=request.getParameter("card_id");
String age=request.getParameter("age");
String tid=request.getParameter("tid");
String sql="insert into student values(null,?,?,?,?,?)";
List<Object> paramList=new ArrayList<Object>();
paramList.add(sname);
paramList.add(sex);
paramList.add(card_id);
paramList.add(age);
paramList.add(tid);
DbHelper dbHelper=new DbHelper();
if(dbHelper.executeUpdate(sql, paramList)>0)
{
response.sendRedirect("ShowStudentsServlet");
}
else
response.getWriter().println("添加失败");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
ShowStudentsServlet
package com.yyy.servlet;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
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 com.yyy.po.Student;
import com.yyy.util.DbHelper;
@WebServlet("/ShowStudentsServlet")
public class ShowStudentsServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public ShowStudentsServlet() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String sql="select * from student";
DbHelper dbHelper=new DbHelper();
List<Map<String, Object>> studentList= dbHelper.executeQuery(sql, null);
List<Student> list=new ArrayList<Student>();
for(Map<String, Object> map:studentList)
{
Student student=new Student();
student.setSid(Integer.parseInt(map.get("sid").toString()));
student.setSname(map.get("sname").toString());
student.setSex(map.get("sex").toString());
student.setCard_id(map.get("card_id").toString());
student.setAge(Integer.parseInt(map.get("age").toString()));
student.setTid(Integer.parseInt(map.get("tid").toString()));
list.add(student);
}
request.setAttribute("list", list);
request.getRequestDispatcher("showStudentList.jsp").forward(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}