mysql+tomcat+jsp增刪改查(二)
四、建立資料庫
mysql>create database jsp;
mysql>use jsp
mysql>create table student(
->id int(30) not null primary key,
->name varchar(50),
->age int(30),
->gender varchar(30),
->major varchar(50)
->);
至此建立了名為jsp的資料庫,一個名叫student的表.
五、頁面製作
在安裝完成的Tomcat6.0中的webapps
新建一個pic和WEB-INF資料夾,在WEB-INF下新建一個web.xml和新建一個lib資料夾
pic 資料夾中放的是圖片,網頁要用背景圖片.自己可以到網上找找。
不要太大的。
但是名字要改成background.jpg
web.xml中的內容為:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
addStuInfo.jsp
<%@ 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>輸入學生資訊介面</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 type="text/javascript"">
function validate()// 功能驗證
{
var id = document.forms[0].id.value;
var name = document.forms[0].name.value;// 0為id號。
var age = document.forms[0].age.value;
var major = document.forms[0].major.value;
if(id <= 0){
alert("學號不能為空,請輸入學號!");
return false;
}
else if(name.length <= 0){
alert("姓名不能為空,請輸入姓名!");
return false;
}
else if(age <= 0){
alert("請輸入合法年齡!");
return false;
}
else if(major.length <= 0){
alert("專業不能為空,請輸入所學專業!");
return false;
}
else{
return true;
}
//document.getElementById("form").submit();
}
</script>
</head>
<body background="pic/background.jpg">
<br>
<center>
<h2>新增學生資訊</h2><hr>
<form action="insert.jsp" method="post" id="form" onSubmit="return validate()" >
<h4> 學號:<input type="text" name="id" class="{required:true}"></input><br></h4>
<h4> 姓名:<input type="text" name="name"></input><br></h4>
<h4> 年齡:<input type="text" name="age"></input><br></h4>
<h4> 性別:<input type="radio" name="gender" value="男">男
<input type="radio" name="gender" value="女">女<br></h4>
<h4> 專業:<input type="text" name="major"></input><br></h4>
<input type="submit" value="提交"/>
</form>
<a href="showInfo.jsp">查詢所有學生資訊</a>
</center>
</body>
</html>
delete.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
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>刪除頁面</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 background="pic/background.jpg">
<%
request.setCharacterEncoding("UTF-8");
String id = request.getParameter("id");
Connection conn = null;
Statement stat = null;
ResultSet rs = null;
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/jsp";
String user = "root";
String password = "root";
conn = DriverManager.getConnection(url,user,password);
stat = conn.createStatement();
stat.executeUpdate("delete from student where id = " + id + "");
rs = stat.executeQuery("select * from student");
if(rs.next())
{
out.print("<center><br><br><h3>刪除成功!</h3></center>");
}
else{
out.print("<center><h3>刪除失敗!</h3></center>");
}
%>
<br>
<br>
<center> <a href=addStuInfo.jsp>返回新增資訊頁面</a> <a href=showInfo.jsp>返回資訊查詢頁面</a></center>
<%
if(rs != null)
{
rs.close();
rs = null;
}
if(stat != null)
{
stat.close();
stat = null;
}
if(conn != null)
{
conn.close();
conn = null;
}
%>
</body>
</html>
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%
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>Welcome,home</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 background="pic/background.jpg"><br/><br/>
<center>
<a href="addStuInfo.jsp">點此新增學生資訊</a><br/><br/>
<a href="showInfo.jsp">點此查詢學生資訊</a><br/><br/>
<a href="showInfo.jsp">點此修改學生資訊</a><br/><br/>
<a href="showInfo.jsp">點此刪除學生資訊</a><br/><br/>
<br>
</center>
</body>
</html>
insert.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
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>插入學生資訊</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 background="pic/background.jpg">
<%
request.setCharacterEncoding("UTF-8");
String id = request.getParameter("id");
String name = request.getParameter("name");
System.out.println(name);
String age = request.getParameter("age");
String gender = request.getParameter("gender");
String major = request.getParameter("major");
Connection conn = null;
Statement stat = null;
ResultSet rs = null;
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/jsp";
String user = "root";
String password = "root";
conn = DriverManager.getConnection(url, user, password);
stat = conn.createStatement();
String sql = "insert into student(id,name,age,gender,major) values(" + id + ",'" + name + "'," + age + ",'" + gender + "','" + major + "')";
stat.executeUpdate(sql);
rs = stat.executeQuery("select * from student");
%>
<center>
<%
if(rs.next())
{
out.print("<br><h3>成功輸入!</h3>");
}
else{
out.print("<br><h3>輸入失敗!</h3>");
}
%>
<br>
<a href=addStuInfo.jsp>返回新增資訊頁面</a> <a href=showInfo.jsp>進入資訊查詢頁面</a>
</center>
<%
if(rs != null)
{
rs.close();
rs = null;
}
if(stat != null)
{
stat.close();
stat = null;
}
if(conn != null)
{
conn.close();
conn = null;
}
%>
</body>
</html>
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