JDBC Programming: Connection MySQL detailed example

Source: Internet
Author: User

1  PackageOrg.warnier.zhang.jdbc;2 3 Importjava.sql.Connection;4 ImportJava.sql.DriverManager;5 ImportJava.sql.ResultSet;6 ImportJava.sql.ResultSetMetaData;7 Importjava.sql.SQLException;8 Importjava.sql.Statement;9 Ten  Public classMysqltest { One  A     /** -      * @paramargs -      * @throwsclassnotfoundexception the      * @throwsSQLException -      */ -      Public Static voidMain (string[] args)throwsClassNotFoundException, - SQLException { +         //load the driver; (The virtual machine loads the class, not the one that is used during programming.) ) -Class.forName ("Com.mysql.jdbc.Driver"); +  A         //establish database connection; atConnection Connection =DriverManager -. getconnection ("Jdbc:mysql://localhost/userinfo", "Warrior", "[email protected]"); -  -         //create the SQL statement, execute the statement, return the result set; -Statement Statement =connection.createstatement (); -ResultSet ResultSet = Statement.executequery ("SELECT * from User"); in  -         //processing result sets (including metadata); to         //Print property name; +ResultSetMetaData Rsmetadata =Resultset.getmetadata (); -          for(inti = 1; I <= rsmetadata.getcolumncount (); i++) { theSystem.out.printf ("%-8s\t", Rsmetadata.getcolumnname (i)); *         } $ System.out.println ();Panax Notoginseng  -         //print attribute values; the          while(Resultset.next ()) { +              for(inti = 1; I <= rsmetadata.getcolumncount (); i++) { ASystem.out.printf ("%-12s\t", resultset.getstring (i)); the             } + System.out.println (); -         } $  $         //close the database connection; (Connecting the database is a big overhead in Java applications.) ) - connection.close (); -     } the  -}

JDBC Programming: Connection MySQL detailed example

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