一.网站系统开发需要掌握的技术,
1.需要java的基础。
2.需要一项有关界面设计的语言基础（Html）。
3连接数据库的方法。
二.课堂测试的源程序代码。
package com.jaovo.msg.Util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class DBUtil {
public static Connection getConnection() {
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance();
} catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String user = "sa";
String password = "123456";
String url = "jdbc:sqlserver://127.0.0.1:1433;DatabaseName=jaovo_msg";
Connection connection = null;
try {
connection
connection = DriverManager.getConnection(url,user,password);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return connection;
}
public static void close(Connection connection ) {
try {
if (connection != null) {
connection.close();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void close(PreparedStatement preparedStatement ) {
try {
if (preparedStatement != null) {
preparedStatement.close();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void close(ResultSet resultSet ) {
try {
if (resultSet != null) {
resultSet.close();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
package com.jaovo.msg.Util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class DBUtil {
public static Connection getConnection() {
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance();
} catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String user = "sa";
String password = "123456";
String url = "jdbc:sqlserver://127.0.0.1:1433;DatabaseName=jaovo_msg";
Connection connection = null;
try {
connection
connection = DriverManager.getConnection(url,user,password);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return connection;
}
public static void close(Connection connection ) {
try {
if (connection != null) {
connection.close();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void close(PreparedStatement preparedStatement ) {
try {
if (preparedStatement != null) {
preparedStatement.close();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void close(ResultSet resultSet ) {
try {
if (resultSet != null) {
resultSet.close();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
<%@page import="com.jaovo.msg.Util.UserException"%>
<%@page import="com.jaovo.msg.dao.UserDaoImpl"%>
<%@page import="com.jaovo.msg.model.User"%>
<%@ 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>
<%
//接收客户端传递过来的参数
String username = request.getParameter("username");
String password = request.getParameter("password");
if (username == null || "".equals(username.trim())) {
request.setAttribute("error", "用户名不能为空");
%>
<jsp:forward page="login.jsp"></jsp:forward>
<%
}
%>
<%
User user = new User();
user.setUsername(username);
user.setPassword(password);
UserDaoImpl userDao = new UserDaoImpl();
try {
if (userDao.checkuser(user)) {
%>
<jsp:forward page="success.jsp"></jsp:forward>
<%
} else
{
request.setAttribute("error", "用户名/密码有误");
%>
<jsp:forward page="login.jsp"></jsp:forward>
<%
}
} catch (UserException e) {
%>
<h2 style="color: red; font-size: 50px">
发生错误 :
<%=e.getMessage()%></h2>
<%
}
%>
</html>
四.说明课堂测试未按时完成的原因。
课下练习时间少，java基础太差，未能及时预习。