JDBC NOTE

JDBC 基本流程：

1. 加载驱动

a. SQLSERVER:Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

b.ORACLE      :Class.forName("oracle.jdbc.driver.oracleDriver");

c.MySQL        :Class.forName("com.mysql.jdbc.Driver");

2.得到连接

a.SQLSERVER: DriverManager.getConnection("jdbc:sqlserver://localhost:1433; DatabaseName=UserManager",userName,password);

b.ORACLE      :DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:DBTEST",userName,password);

c.MySQl         :DriverManager.getConnection("jdbc:mysql://localhost:3306/UserManager",userName,password);

3.创建PreparedStatement

4.执行操作

5.根据结果做处理

例：

     String driverName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
         String dbURL="jdbc:sqlserver://localhost:1433; DatabaseName=UserManager";
         String sqlUserName="sa";
         String userPwd="wfjts12332100";
         Connection dbConn=null;
         ResultSet rs=null;
         PreparedStatement ps=null;
         try
         {
             Class.forName(driverName);
             dbConn=DriverManager.getConnection(dbURL,sqlUserName,userPwd);
             System.out.println("Connection Successful!");
             ps=dbConn.prepareStatement("select * from users where id=? and passwd=? ");
             ps.setObject(1, userName);
             ps.setObject(2, password);
             rs=ps.executeQuery();
             if(rs.next())
             {
                 System.out.println("用戶合法");
             }
         }
         catch(Exception ex)
         {
             ex.printStackTrace();
         }