java web學生表的增加、修改、刪除
阿新 • • 發佈：2019-02-08
三層架構：
1.建立包cn.sdut.dao
建立類：
BaseDao.java/StudentDao.java
BaseDao.java:
建立資料庫的連線。public Connection getConn()
關閉資料庫。public void closeAll()
StudentDao.java:
資料庫的增刪改查函式。
2.建立包cn.sdut.po
建立類：
Student.java
Student.java:
定義各個屬性。再利用自動補全實現。
3.建立包cn.sdut.view
建立類：
Main.java
測試資料庫的增刪改查是否可以實現。
JSP介面：
首先將js那個資料夾考到
index.jsp:對資料庫的展示：
效果如下“
addStudent.jsp:
updateStudent.jsp:
doDelete.jsp:
刪除學生
原始碼如下：
BaseDao.java:
StudentDao.java:package cn.sdut.dao; import java.sql.*; public class BaseDao { Connection con; PreparedStatement pst; ResultSet rs; public Connection getConn(){ try { Class.forName("com.mysql.jdbc.Driver"); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } String url="jdbc:mysql://localhost:3307/school?useUnicode=true&characterEncoding=utf-8"; try { con=DriverManager.getConnection(url,"root","usbw"); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } return con; } public void closeAll(){ try { if(rs!=null) rs.close(); if(pst!=null) pst.close(); if(con!=null) con.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public static void main(String[] args){ BaseDao baseDao = new BaseDao(); Connection conn=baseDao.getConn(); if(conn!=null) System.out.println("yes"); else System.out.println("no"); } }
Student.java:package cn.sdut.dao; import java.sql.SQLException; import java.util.*; import cn.sdut.po.Student; public class StudentDao extends BaseDao { public int add(Student stu) { int result=0; con=getConn(); String sql="insert into student(name,birthday,score) values(?,?,?)"; try { pst=con.prepareStatement(sql); pst.setString(1, stu.getName()); pst.setString(2,stu.getBirthday()); pst.setFloat(3, stu.getScore()); result=pst.executeUpdate(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally{ closeAll(); } return result; } public int del(int id) { int result=0; con=getConn(); String sql="delete from student where id=?"; try { pst=con.prepareStatement(sql); pst.setInt(1, id); result=pst.executeUpdate(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally{ closeAll(); } return result; } public int update(Student stu) { int result=0; con=getConn(); String sql="update student set name='"+stu.getName()+"',birthday='"+stu.getBirthday()+"',score='"+stu.getScore()+"' where id="+stu.getId(); System.out.println(stu.getId()); try { pst=con.prepareStatement(sql); result=pst.executeUpdate(sql); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { closeAll(); } return result; } public List<Student> queryAll() { List<Student> list=new ArrayList<Student>(); con=getConn(); String sql="select * from student"; try { pst=con.prepareStatement(sql); rs=pst.executeQuery(); while(rs.next()) { Student stu= new Student(); stu.setId(rs.getInt(1)); stu.setName(rs.getString(2)); stu.setBirthday(rs.getString(3)); stu.setScore(rs.getFloat(4)); list.add(stu); } } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { closeAll(); } return list; } public Student queryStudentById(int id){ Student stu=new Student(); con=getConn(); String sql="select * from student where id="+id; try { pst=con.prepareStatement(sql); rs=pst.executeQuery(sql); if(rs.next()) { stu.setId(rs.getInt(1)); stu.setName(rs.getString(2)); stu.setBirthday(rs.getString(3)); stu.setScore(rs.getFloat(4)); } } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } return stu; } }
package cn.sdut.po;
public class Student {
private String name;
private int id;
private String birthday;
private float score;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getBirthday() {
return birthday;
}
public void setBirthday(String birthday) {
this.birthday = birthday;
}
public float getScore() {
return score;
}
public void setScore(float score) {
this.score = score;
}
@Override
public String toString() {
return "Student [name=" + name + ", id=" + id + ", birthday=" + birthday
+ ", score=" + score + "]";
}
}
package cn.sdut.view;
import java.util.List;
import cn.sdut.dao.StudentDao;
import cn.sdut.po.Student;
public class Main{
public static void main(String[] args){
StudentDao studentDao=new StudentDao();
Student stu=new Student();
stu.setId(48);
stu.setName("李四");
stu.setBirthday("45613");
stu.setScore(78);
//studentDao.add(stu);
//studentDao.del(30);
//studentDao.update(stu);
Student stu1=studentDao.queryStudentById(61);
System.out.println(stu1);
// List <Student> list=studentDao.queryAll();
// for(Student stu1:list)
// {
// System.out.println(stu1);
// }
}
}calendar.js:
/**
* Calendar
* @param beginYear 1990
* @param endYear 2010
* @param language 0(zh_cn)|1(en_us)|2(en_en)|3(zh_tw)
* @param patternDelimiter "-"
* @param date2StringPattern "yyyy-MM-dd"
* @param string2DatePattern "ymd"
* @version 1.0 build 2006-04-01
* @version 1.1 build 2006-12-17
* @author KimSoft (jinqinghua [at] gmail.com)
* NOTE! you can use it free, but keep the copyright please
* IMPORTANT:you must include this script file inner html body elment
*/
function Calendar(beginYear, endYear, language, patternDelimiter, date2StringPattern, string2DatePattern) {
this.beginYear = beginYear || 1958;
this.endYear = endYear || 2090;
this.language = language || 0;
this.patternDelimiter = patternDelimiter || "-";
this.date2StringPattern = date2StringPattern || Calendar.language["date2StringPattern"][this.language].replace(/\-/g, this.patternDelimiter);
this.string2DatePattern = string2DatePattern || Calendar.language["string2DatePattern"][this.language];
this.dateControl = null;
this.panel = this.getElementById("__calendarPanel");
this.iframe = window.frames["__calendarIframe"];
this.form = null;
this.date = new Date();
this.year = this.date.getFullYear();
this.month = this.date.getMonth();
this.colors = {"bg_cur_day":"#00CC33","bg_over":"#EFEFEF","bg_out":"#FFCC00"}
};
Calendar.language = {
"year" : ["\u5e74", "", "", "\u5e74"],
"months" : [
["\u4e00\u6708","\u4e8c\u6708","\u4e09\u6708","\u56db\u6708","\u4e94\u6708","\u516d\u6708","\u4e03\u6708","\u516b\u6708","\u4e5d\u6708","\u5341\u6708","\u5341\u4e00\u6708","\u5341\u4e8c\u6708"],
["JAN","FEB","MAR","APR","MAY","JUN","JUL","AUG","SEP","OCT","NOV","DEC"],
["JAN","FEB","MAR","APR","MAY","JUN","JUL","AUG","SEP","OCT","NOV","DEC"],
["\u4e00\u6708","\u4e8c\u6708","\u4e09\u6708","\u56db\u6708","\u4e94\u6708","\u516d\u6708","\u4e03\u6708","\u516b\u6708","\u4e5d\u6708","\u5341\u6708","\u5341\u4e00\u6708","\u5341\u4e8c\u6708"]
],
"weeks" : [["\u65e5","\u4e00","\u4e8c","\u4e09","\u56db","\u4e94","\u516d"],
["Sun","Mon","Tur","Wed","Thu","Fri","Sat"],
["Sun","Mon","Tur","Wed","Thu","Fri","Sat"],
["\u65e5","\u4e00","\u4e8c","\u4e09","\u56db","\u4e94","\u516d"]
],
"clear" : ["\u6e05\u7a7a", "Clear", "Clear", "\u6e05\u7a7a"],
"today" : ["\u4eca\u5929", "Today", "Today", "\u4eca\u5929"],
"close" : ["\u5173\u95ed", "Close", "Close", "\u95dc\u9589"],
"date2StringPattern" : ["yyyy-MM-dd", "yyyy-MM-dd", "yyyy-MM-dd", "yyyy-MM-dd"],
"string2DatePattern" : ["ymd","ymd", "ymd", "ymd"]
};
Calendar.prototype.draw = function() {
calendar = this;
var _cs = [];
_cs[_cs.length] = '<form id="__calendarForm" name="__calendarForm" method="post">';
_cs[_cs.length] = '<table id="__calendarTable" width="100%" border="0" cellpadding="3" cellspacing="1" align="center">';
_cs[_cs.length] = ' <tr>';
_cs[_cs.length] = ' <th><input class="l" name="goPrevMonthButton" type="button" id="goPrevMonthButton" value="<" \/><\/th>';
_cs[_cs.length] = ' <th colspan="5"><select class="year" name="yearSelect" id="yearSelect"><\/select><select class="month" name="monthSelect" id="monthSelect"><\/select><\/th>';
_cs[_cs.length] = ' <th><input class="r" name="goNextMonthButton" type="button" id="goNextMonthButton" value=">" \/><\/th>';
_cs[_cs.length] = ' <\/tr>';
_cs[_cs.length] = ' <tr>';
for(var i = 0; i < 7; i++) {
_cs[_cs.length] = '<th class="theader">';
_cs[_cs.length] = Calendar.language["weeks"][this.language][i];
_cs[_cs.length] = '<\/th>';
}
_cs[_cs.length] = '<\/tr>';
for(var i = 0; i < 6; i++){
_cs[_cs.length] = '<tr align="center">';
for(var j = 0; j < 7; j++) {
switch (j) {
case 0: _cs[_cs.length] = '<td class="sun"> <\/td>'; break;
case 6: _cs[_cs.length] = '<td class="sat"> <\/td>'; break;
default:_cs[_cs.length] = '<td class="normal"> <\/td>'; break;
}
}
_cs[_cs.length] = '<\/tr>';
}
_cs[_cs.length] = ' <tr>';
_cs[_cs.length] = ' <th colspan="2"><input type="button" class="b" name="clearButton" id="clearButton" \/><\/th>';
_cs[_cs.length] = ' <th colspan="3"><input type="button" class="b" name="selectTodayButton" id="selectTodayButton" \/><\/th>';
_cs[_cs.length] = ' <th colspan="2"><input type="button" class="b" name="closeButton" id="closeButton" \/><\/th>';
_cs[_cs.length] = ' <\/tr>';
_cs[_cs.length] = '<\/table>';
_cs[_cs.length] = '<\/form>';
this.iframe.document.body.innerHTML = _cs.join("");
this.form = this.iframe.document.forms["__calendarForm"];
this.form.clearButton.value = Calendar.language["clear"][this.language];
this.form.selectTodayButton.value = Calendar.language["today"][this.language];
this.form.closeButton.value = Calendar.language["close"][this.language];
this.form.goPrevMonthButton.onclick = function () {calendar.goPrevMonth(this);}
this.form.goNextMonthButton.onclick = function () {calendar.goNextMonth(this);}
this.form.yearSelect.onchange = function () {calendar.update(this);}
this.form.monthSelect.onchange = function () {calendar.update(this);}
this.form.clearButton.onclick = function () {calendar.dateControl.value = "";calendar.hide();}
this.form.closeButton.onclick = function () {calendar.hide();}
this.form.selectTodayButton.onclick = function () {
var today = new Date();
calendar.date = today;
calendar.year = today.getFullYear();
calendar.month = today.getMonth();
calendar.dateControl.value = today.format(calendar.date2StringPattern);
calendar.hide();
}
};
Calendar.prototype.bindYear = function() {
var ys = this.form.yearSelect;
ys.length = 0;
for (var i = this.beginYear; i <= this.endYear; i++){
ys.options[ys.length] = new Option(i + Calendar.language["year"][this.language], i);
}
};
Calendar.prototype.bindMonth = function() {
var ms = this.form.monthSelect;
ms.length = 0;
for (var i = 0; i < 12; i++){
ms.options[ms.length] = new Option(Calendar.language["months"][this.language][i], i);
}
};
Calendar.prototype.goPrevMonth = function(e){
if (this.year == this.beginYear && this.month == 0){return;}
this.month--;
if (this.month == -1) {
this.year--;
this.month = 11;
}
this.date = new Date(this.year, this.month, 1);
this.changeSelect();
this.bindData();
};
Calendar.prototype.goNextMonth = function(e){
if (this.year == this.endYear && this.month == 11){return;}
this.month++;
if (this.month == 12) {
this.year++;
this.month = 0;
}
this.date = new Date(this.year, this.month, 1);
this.changeSelect();
this.bindData();
};
Calendar.prototype.changeSelect = function() {
var ys = this.form.yearSelect;
var ms = this.form.monthSelect;
for (var i= 0; i < ys.length; i++){
if (ys.options[i].value == this.date.getFullYear()){
ys[i].selected = true;
break;
}
}
for (var i= 0; i < ms.length; i++){
if (ms.options[i].value == this.date.getMonth()){
ms[i].selected = true;
break;
}
}
};
Calendar.prototype.update = function (e){
this.year = e.form.yearSelect.options[e.form.yearSelect.selectedIndex].value;
this.month = e.form.monthSelect.options[e.form.monthSelect.selectedIndex].value;
this.date = new Date(this.year, this.month, 1);
this.changeSelect();
this.bindData();
};
Calendar.prototype.bindData = function () {
var calendar = this;
var dateArray = this.getMonthViewDateArray(this.date.getFullYear(), this.date.getMonth());
var tds = this.getElementsByTagName("td", this.getElementById("__calendarTable", this.iframe.document));
for(var i = 0; i < tds.length; i++) {
tds[i].style.backgroundColor = calendar.colors["bg_over"];
tds[i].onclick = null;
tds[i].onmouseover = null;
tds[i].onmouseout = null;
tds[i].innerHTML = dateArray[i] || " ";
if (i > dateArray.length - 1) continue;
if (dateArray[i]){
tds[i].onclick = function () {
if (calendar.dateControl){
calendar.dateControl.value = new Date(calendar.date.getFullYear(),
calendar.date.getMonth(),
this.innerHTML).format(calendar.date2StringPattern);
}
calendar.hide();
}
tds[i].onmouseover = function () {this.style.backgroundColor = calendar.colors["bg_out"];}
tds[i].onmouseout = function () {this.style.backgroundColor = calendar.colors["bg_over"];}
var today = new Date();
if (today.getFullYear() == calendar.date.getFullYear()) {
if (today.getMonth() == calendar.date.getMonth()) {
if (today.getDate() == dateArray[i]) {
tds[i].style.backgroundColor = calendar.colors["bg_cur_day"];
tds[i].onmouseover = function () {this.style.backgroundColor = calendar.colors["bg_out"];}
tds[i].onmouseout = function () {this.style.backgroundColor = calendar.colors["bg_cur_day"];}
}
}
}
}//end if
}//end for
};
Calendar.prototype.getMonthViewDateArray = function (y, m) {
var dateArray = new Array(42);
var dayOfFirstDate = new Date(y, m, 1).getDay();
var dateCountOfMonth = new Date(y, m + 1, 0).getDate();
for (var i = 0; i < dateCountOfMonth; i++) {
dateArray[i + dayOfFirstDate] = i + 1;
}
return dateArray;
};
Calendar.prototype.show = function (dateControl, popuControl) {
if (this.panel.style.visibility == "visible") {
this.panel.style.visibility = "hidden";
}
if (!dateControl){
throw new Error("arguments[0] is necessary!")
}
this.dateControl = dateControl;
popuControl = popuControl || dateControl;
this.draw();
this.bindYear();
this.bindMonth();
if (dateControl.value.length > 0){
this.date = new Date(dateControl.value.toDate(this.patternDelimiter, this.string2DatePattern));
this.year = this.date.getFullYear();
this.month = this.date.getMonth();
}
this.changeSelect();
this.bindData();
var xy = this.getAbsPoint(popuControl);
this.panel.style.left = xy.x + "px";
this.panel.style.top = (xy.y + dateControl.offsetHeight) + "px";
this.panel.style.visibility = "visible";
};
Calendar.prototype.hide = function() {
this.panel.style.visibility = "hidden";
};
Calendar.prototype.getElementById = function(id, object){
object = object || document;
return document.getElementById ? object.getElementById(id) : document.all(id);
};
Calendar.prototype.getElementsByTagName = function(tagName, object){
object = object || document;
return document.getElementsByTagName ? object.getElementsByTagName(tagName) : document.all.tags(tagName);
};
Calendar.prototype.getAbsPoint = function (e){
var x = e.offsetLeft;
var y = e.offsetTop;
while(e = e.offsetParent){
x += e.offsetLeft;
y += e.offsetTop;
}
return {"x": x, "y": y};
};
/**
* @param d the delimiter
* @param p the pattern of your date
* @author meizz
* @author kimsoft add w+ pattern
*/
Date.prototype.format = function(style) {
var o = {
"M+" : this.getMonth() + 1, //month
"d+" : this.getDate(), //day
"h+" : this.getHours(), //hour
"m+" : this.getMinutes(), //minute
"s+" : this.getSeconds(), //second
"w+" : "\u65e5\u4e00\u4e8c\u4e09\u56db\u4e94\u516d".charAt(this.getDay()), //week
"q+" : Math.floor((this.getMonth() + 3) / 3), //quarter
"S" : this.getMilliseconds() //millisecond
}
if (/(y+)/.test(style)) {
style = style.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
}
for(var k in o){
if (new RegExp("("+ k +")").test(style)){
style = style.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length));
}
}
return style;
};
/**
* @param d the delimiter
* @param p the pattern of your date
* @rebuilder kimsoft
* @version build 2006.12.15
*/
String.prototype.toDate = function(delimiter, pattern) {
delimiter = delimiter || "-";
pattern = pattern || "ymd";
var a = this.split(delimiter);
var y = parseInt(a[pattern.indexOf("y")], 10);
//remember to change this next century ;)
if(y.toString().length <= 2) y += 2000;
if(isNaN(y)) y = new Date().getFullYear();
var m = parseInt(a[pattern.indexOf("m")], 10) - 1;
var d = parseInt(a[pattern.indexOf("d")], 10);
if(isNaN(d)) d = 1;
return new Date(y, m, d);
};
document.writeln('<div id="__calendarPanel" style="position:absolute;visibility:hidden;z-index:9999;background-color:#FFFFFF;border:1px solid #666666;width:200px;height:216px;">');
document.writeln('<iframe name="__calendarIframe" id="__calendarIframe" width="100%" height="100%" scrolling="no" frameborder="0" style="margin:0px;"><\/iframe>');
var __ci = window.frames['__calendarIframe'];
__ci.document.writeln('<!DOCTYPE html PUBLIC "-\/\/W3C\/\/DTD XHTML 1.0 Transitional\/\/EN" "http:\/\/www.w3.org\/TR\/xhtml1\/DTD\/xhtml1-transitional.dtd">');
__ci.document.writeln('<html xmlns="http:\/\/www.w3.org\/1999\/xhtml">');
__ci.document.writeln('<head>');
__ci.document.writeln('<meta http-equiv="Content-Type" content="text\/html; charset=utf-8" \/>');
__ci.document.writeln('<title>Web Calendar(UTF-8) Written By KimSoft<\/title>');
__ci.document.writeln('<style type="text\/css">');
__ci.document.writeln('<!--');
__ci.document.writeln('body {font-size:12px;margin:0px;text-align:center;}');
__ci.document.writeln('form {margin:0px;}');
__ci.document.writeln('select {font-size:12px;background-color:#EFEFEF;}');
__ci.document.writeln('table {border:0px solid #CCCCCC;background-color:#FFFFFF}');
__ci.document.writeln('th {font-size:12px;font-weight:normal;background-color:#FFFFFF;}');
__ci.document.writeln('th.theader {font-weight:normal;background-color:#666666;color:#FFFFFF;width:24px;}');
__ci.document.writeln('select.year {width:64px;}');
__ci.document.writeln('select.month {width:60px;}');
__ci.document.writeln('td {font-size:12px;text-align:center;}');
__ci.document.writeln('td.sat {color:#0000FF;background-color:#EFEFEF;}');
__ci.document.writeln('td.sun {color:#FF0000;background-color:#EFEFEF;}');
__ci.document.writeln('td.normal {background-color:#EFEFEF;}');
__ci.document.writeln('input.l {border: 1px solid #CCCCCC;background-color:#EFEFEF;width:20px;height:20px;}');
__ci.document.writeln('input.r {border: 1px solid #CCCCCC;background-color:#EFEFEF;width:20px;height:20px;}');
__ci.document.writeln('input.b {border: 1px solid #CCCCCC;background-color:#EFEFEF;width:100%;height:20px;}');
__ci.document.writeln('-->');
__ci.document.writeln('<\/style>');
__ci.document.writeln('<\/head>');
__ci.document.writeln('<body>');
__ci.document.writeln('<\/body>');
__ci.document.writeln('<\/html>');
__ci.document.close();
document.writeln('<\/div>');
var calendar = new Calendar();
//--><%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'addStudent.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script src="js/calendar.js"></script>
</head>
<body>
<form action="doAdd.jsp" method="post">
<table border="1">
<caption>增加學生</caption>
<tr>
<td align="center">姓 名 </td>
<td width="50"><input type="text" name="name" style="height: 27px; width: 319px; "/></td></tr>
<tr>
<td width="50" align="center" >出 生 年 月 </td>
<td><input type="text" name="birthday" style="height: 27px; width: 319px;" onclick="new Calendar().show(this) "/></td></tr>
<tr>
<td width="50" align="center">成 績</td>
<td><input type="text" name="score" style="height: 27px; width: 319px;"/></td></tr>
<tr>
<td colspan="2" align="center">
<input type="submit" value="確定" />
<input type="reset" value="取消"/>
</td>
</table>
</form>
</body>
</html>
doAdd.jsp:
<%@page import="cn.sdut.po.Student" %>
<%@page import="cn.sdut.dao.StudentDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'doAdd.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<%
request.setCharacterEncoding("UTF-8");
String name=request.getParameter("name");
String birthday=request.getParameter("birthday");
String score1=request.getParameter("score");
float score=Float.parseFloat(score1);
Student stu=new Student();
stu.setName(name);
stu.setBirthday(birthday);
stu.setScore(score);
<pre name="code" class="html"><%@page import="cn.sdut.dao.StudentDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'doDelete.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%
//1 獲得客戶端資料
int id=Integer.parseInt(request.getParameter("id"));
//2 利用StudentDao類的delStudent(id)方法刪除
StudentDao dao=new StudentDao();
int result=dao.del(id);
//3 回到main.jsp
%>
<jsp:forward page="index.jsp"></jsp:forward>
</body>
</html>
doDelete.jsp:
<%@page import="cn.sdut.dao.StudentDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'doDelete.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%
//1 獲得客戶端資料
int id=Integer.parseInt(request.getParameter("id"));
//2 利用StudentDao類的delStudent(id)方法刪除
StudentDao dao=new StudentDao();
int result=dao.del(id);
//3 回到main.jsp
%>
<jsp:forward page="index.jsp"></jsp:forward>
</body>
</html>
doUpdate.jsp:
<%@page import="cn.sdut.dao.StudentDao" %>
<%@page import="cn.sdut.po.Student" %>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'doUpdate.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<%
request.setCharacterEncoding("utf-8");
int id=Integer.parseInt(request.getParameter("id"));
String name=request.getParameter("name");
String birthday=request.getParameter("birthday");
String score1=request.getParameter("score");
float score=Float.parseFloat(score1);
Student stu=new Student();
stu.setId(id);
stu.setName(name);
stu.setBirthday(birthday);
stu.setScore(score);
StudentDao studentDao=new StudentDao();
studentDao.update(stu);
%>
<jsp:forward page="index.jsp"></jsp:forward>
<body>
</body>
</html>
<pre name="code" class="html"><pre name="code" class="html"><%@page import="cn.sdut.dao.StudentDao"%>
<%@page import="cn.sdut.po.Student"%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<%
StudentDao studentDao=new StudentDao();
List<Student> list=studentDao.queryAll();
int i=1;
%>
<body>
<table border="1">
<caption>學生表</caption>
<tr>
<td>序號</td>
<td>姓名</td>
<td>出生年月</td>
<td>成績</td>
<td>操作</td>
</tr>
<%
for(Student stu:list){
%>
<tr>
<td>
<%=i++ %>
</td>
<td><%=stu.getName()%></td>
<td><%=stu.getBirthday()%></td>
<td><%=stu.getScore()%></td>
<td><a href="updateStudent.jsp?id=<%=stu.getId()%>">修改</a>
<a href="doDelete.jsp?id=<%=stu.getId()%>">刪除</a>
</td>
</tr>
<%} %>
</table>
<a href="addStudent.jsp">增加學生</a>
</body>
</html>
updateStudent.java:
<%@page import="cn.sdut.po.Student" %>
<%@page import="cn.sdut.dao.StudentDao" %>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'update.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script src="js/calendar.js"></script>
</head>
<%
//1 從客戶端接收id
int id=Integer.parseInt(request.getParameter("id"));
//2 利用StudentDao類queryStudentById方法得到Student物件
StudentDao studentDao=new StudentDao();
Student stu=studentDao.queryStudentById(id);
%>
<body>
<form action="doUpdate.jsp" method="post">
<table>
<caption>修改學生資訊</caption>
<tr>
<td>姓名</td>
<td><input type="text" name="name" value="<%=stu.getName()%>"/></td>
</tr>
<tr>
<td>出生年月</td>
<td><input type="text" name="birthday" value="<%=stu.getBirthday()%>" onclick="new Calendar().show(this)"/></td>
</tr>
<tr>
<td>成績</td>
<td><input type="text" name="score" value="<%=stu.getScore()%>"></td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="確定" />
<input type="reset" value="取消"/>
</td>
</table>
<input type="hidden" name="id" value="<%=stu.getId()%>"/>
</form>
</body>
</html>
/注意SQL不適用字串拼接時，String sql="update goods set id=?,goodsname=?,price=?,size=?,color=?,number=? where id=?";
注意中間是逗號，注意有兩個id