增加和查询界面：
<%@page import="java.text.SimpleDateFormat"%>
<%@page import="java.sql.*"%>
<%@ 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" cellpadding="0" cellspacing="0" width="700" align="center" >
<tr height="20"><td colspan="7" rowspan="2" width="700"><center><h2>教师信息表</h2></center></td> </tr>
<tr height="20"></tr>
<tr height="20" align="center">
<td width="100">TNO</td>
<td width="100">TNAME</td>
<td width="100">TSEX</td>
<td width="100">TBIRTHDAY</td>
<td width="100">PROF</td>
<td width="100">DEPART</td>
<td width="100">操作</td>
</tr>
</table>
<%
try {
//连接数据库
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ORCL","test","test");
Statement st=con.createStatement();
ResultSet rs=st.executeQuery("select * from teacher");
if(rs!=null)
{
while(rs.next())
{
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
%>
<table border="1" cellpadding="0" cellspacing="0" width="700" align="center" >
<tr height="30" align="center">
<td width="100"><%=rs.getString("tno") %></td>
<td width="100"><%=rs.getString("tname") %></td>
<td width="100"><%=rs.getString("tsex") %></td>
<td width="100"><%=sdf.format(rs.getDate("tbirthday"))%></td>
<td width="100"><%=rs.getString("prof") %></td>
<td width="100"><%=rs.getString("depart") %></td>
<td width="100"><a href=‘UpdateT.jsp?tno=<%=rs.getString("tno") %>‘>修改</a> <a href=‘DeleteTeacher?tno=<%=rs.getString("tno") %>‘>删除</a></td>
</tr>
</table>
<%
}
}
con.close();
st.close();
rs.close();
} catch (Exception e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
%>
<br><b>添加教师信息</b><br>
<form action="SaveTeacher" method="post">
<table cellpadding="0" cellspacing="0" >
<tr>
<td>编号：</td>
<td><input type="text" name="tno"></td>
</tr>
<tr>
<td>姓名：</td>
<td><input type="text" name="tname"></td>
</tr>
<tr>
<td>性别：</td>
<td><input type="text" name="tsex"></td>
</tr>
<tr>
<td>生日：</td>
<td><input type="text" name="tbirthday"></td>
</tr>
<tr>
<td>职称：</td>
<td><input type="text" name="prof"></td>
</tr>
<tr>
<td>系别：</td>
<td><input type="text" name="depart"></td>
</tr>
<tr>
<td><input type="submit" value="提交"></td>
</tr>
</table>
</form>
</body>
</html>
删除功能，servlet
package com.hanqi.web;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class DeleteTeacher
*/
public class DeleteTeacher extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public DeleteTeacher() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
//response.getWriter().append("Served at: ").append(request.getContextPath());
String tno=request.getParameter("tno");
if(tno!=null&&tno.trim().length()!=0)
{
try{
//处理，即保存
//连接数据库
//1.加载驱动
Class.forName("oracle.jdbc.driver.OracleDriver");
//2.得到连接
Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ORCL","test","test");
//插入数据
PreparedStatement ps=con.prepareStatement(
"delete teacher where "+"tno=?");
ps.setString(1, tno);
ps.executeUpdate();
ps.close();
con.close();
//跳转页面
response.getWriter().write("删除成功！");
response.setHeader("refresh", "3;teacher.jsp");
}catch (Exception e)
{
e.printStackTrace();
response.getWriter().write("删除失败！");
response.setHeader("refresh", "3;teacher.jsp");
}
}
else
{
response.getWriter().write("请正确提交数据！");
response.setHeader("refresh", "3;teacher.jsp");
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
更新：
<%@page import="java.text.*"%>
<%@page import="java.sql.*"%>
<%@ 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>
<%
//接收主键，从数据库中读取最新数据
String tno=request.getParameter("tno");
String tname="";
String tsex="";
String tbirthday="";
String prof="";
String depart="";
if(tno!=null&&tno.trim().length()>0)
{
//读取最新数据
try{
//处理，即保存
//连接数据库
//1.加载驱动
Class.forName("oracle.jdbc.driver.OracleDriver");
//2.得到连接
Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ORCL","test","test");
PreparedStatement ps=con.prepareStatement("select * from teacher where tno = ?");
ps.setString(1, tno);
ResultSet rs=ps.executeQuery();
if(rs!=null&&rs.next())
{
tname=rs.getString("tname");
tsex=rs.getString("tsex");
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
tbirthday=sdf.format(rs.getDate("tbirthday"));
prof=rs.getString("prof");
depart=rs.getString("depart");
}else
{
out.print("未查询到数据");
}
rs.close();
ps.close();
con.close();
}catch (Exception e)
{
e.printStackTrace();
response.getWriter().write("保存失败！");
response.setHeader("refresh", "3;teacher.jsp");
}
}else
{
out.print("请正确访问");
}
%>
<br><b>修改教师信息</b><br>
<form action="SaveTeacher" method="post">
<table cellpadding="0" cellspacing="0" >
<tr>
<td>编号：</td>
<td><input type="text" name="tno" value="<%=tno %>" readonly="readonly"></td>
</tr>
<tr>
<td>姓名：</td>
<td><input type="text" name="tname" value="<%=tname %>"></td>
</tr>
<tr>
<td>性别：</td>
<td><input type="text" name="tsex" value="<%=tsex %>"></td>
</tr>
<tr>
<td>生日：</td>
<td><input type="text" name="tbirthday" value="<%=tbirthday %>"></td>
</tr>
<tr>
<td>职称：</td>
<td><input type="text" name="prof" value="<%=prof %>"></td>
</tr>
<tr>
<td>系别：</td>
<td><input type="text" name="depart" value="<%=depart %>"></td>
</tr>
<tr>
<td><input type="submit" value="提交"></td>
<td><input type="hidden" name="isupdate" value="1"></td>
</tr>
</table>
</form>
</body>
</html>
保存：
package com.hanqi.web;
import java.io.IOException;
import java.sql.*;
import java.text.SimpleDateFormat;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class SaveTeacher
*/
public class SaveTeacher extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public SaveTeacher() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
//response.getWriter().append("Served at: ").append(request.getContextPath());
String tno=request.getParameter("tno");
String tname=request.getParameter("tname");
String tsex=request.getParameter("tsex");
String tbirthday=request.getParameter("tbirthday");
String prof=request.getParameter("prof");
String depart=request.getParameter("depart");
String isupdate=request.getParameter("isupdate");
if(tno!=null&&tno.trim().length()!=0)
{
try {
//连接数据库
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ORCL","test","test");
PreparedStatement ps=con.prepareStatement(
"insert into teacher (tname,tsex,tbirthday,prof,depart,tno)"+" values (?,?,?,?,?,?)");
if(isupdate!=null&&isupdate.equals("1"))
{
ps=con.prepareStatement(
"update teacher set tname=?,tsex=?,tbirthday=?,prof=?,depart=? where "+"tno=?");
}
SimpleDateFormat adf=new SimpleDateFormat("yyyy-MM-dd");
java.util.Date bir =adf.parse(tbirthday);
//使用long型的时间构造sql.Date
Date sqlBir=new Date(bir.getTime());
ps.setString(1, tname);
ps.setString(2, tsex);
ps.setDate(3 ,sqlBir);
ps.setString(4, prof);
ps.setString(5, depart);
ps.setString(6, tno);
ps.executeUpdate();
ps.close();
con.close();
response.getWriter().write("保存成功！");
response.setHeader("refresh", "3;teacher.jsp");
} catch (Exception e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
response.getWriter().write("保存失败！");
response.setHeader("refresh", "3;teacher.jsp");
}
}else
{
response.getWriter().write("请正确提交数据！");
response.setHeader("refresh", "3;teacher.jsp");
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
运行结果：
时间： 2024-12-10 00:19:24