⑴ php連接資料庫關於PDO類和PDOStatement類的區別是什麼
PDO可以兼容更多資料庫，同樣的語法訪問不跡兆同搭梁資料庫；
配置簡單，操作方便；
PDO對預處理語句的支持需要使用PDOStatement類對象，所以PDOStatement類只是PDO的一部分，這個類比較大作用是防止sql注入：
<?php
//...省略PDO連接資料庫代碼
$query="insertintocontactinfo(name,address,phone)values(:name,:address,:phone)";
$stmt=$dbh->prepare($query);//調用PDO對象中的prepare()方法
$stmt->blinparam(':name',$name);//將變數$name的引用綁定到准備好的查詢名字參數":name"中
$stmt->blinparam(':address',$address);
$stmt->blinparam(':phone',phone);
//...
?>
它是每個欄位值可以對知州運應替換的，pdo可以對每個值進行處理，防止sql注入；
⑵ JDBC用來連接資料庫的類是哪個類
用這個類吧.好的話,給我加加分.
import java.sql.*;
/**
* @功能: 一個JDBC的本地化API連接類,封裝了數據操作方法,只用傳一個SQL語句即可
* @作者: 李開歡
* @日期: 2007/
*/
public class ConnectionDemo {
/*
* 這里可以將常量全部放入另一個類中,以方便修改
*/
private static Connection conn;
private static Statement ps;
private static ResultSet rs;
private static final String DRIVER = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
private static final String URL = "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=mydb";
private static final String USER ="sa";
private static final String PASS = "sa";
public ConnectionDemo() {
// TODO Auto-generated constructor stub
ConnectionDemo.getConnection();
}
public static Connection getConnection(){
System.out.println("連接中...");
try {
Class.forName(ConnectionDemo.DRIVER);
conn = DriverManager.getConnection(ConnectionDemo.URL, ConnectionDemo.USER, ConnectionDemo.PASS);
System.out.println("成功連接");
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
}
public static Statement getStatement(String sql){
System.out.println("執行SQL語句中...");
try {
ps = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
if(sql.substring(0, 6).equals("select")){
rs = ps.executeQuery(sql);
System.out.println("執行完查詢操作,結果已返回ResultSet集合");
}else if(sql.substring(0, 6).equals("delete")){
ps.executeUpdate(sql);
System.out.println("已執行完畢刪除操作");
}else if(sql.substring(0, 6).equals("insert")){
ps.executeUpdate(sql);
System.out.println("已執行完畢增加操作");
}else{
ps.executeUpdate(sql);
System.out.println("已執行完畢更新操作");
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return ps;
}
public static ResultSet getResultSet(){
System.out.println("查詢結果為:");
return rs;
}
public static void closeConnection(){
System.out.println("關閉連接中...");
try {
if (rs != null) {
rs.close();
System.out.println("已關閉ResultSet");
}
if (ps != null) {
ps.close();
System.out.println("已關閉Statement");
}
if (conn != null) {
conn.close();
System.out.println("已關閉Connection");
}
} catch (Exception e) {
// TODO: handle exception
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
ConnectionDemo.getConnection();
String sql = "delete from type where id = 1";
ConnectionDemo.getStatement(sql);
String sql2 = "insert into type values(1,'教學設備')";
ConnectionDemo.getStatement(sql2);
String sql1 = "select * from type";
ConnectionDemo.getStatement(sql1);
ResultSet rs = ConnectionDemo.getResultSet();
System.out.println("編號 "+"類 型");
try {
while(rs.next()){
System.out.print(" "+rs.getInt(1)+" ");
System.out.println(rs.getString(2));
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ConnectionDemo.closeConnection();
}
}