Use the methods in the java.sql package in the JDK for JDBC connections

The first step is to describe the JDBC connection using the java.sql package:

1. Load the driver for the database. (typically the data driver name for Oracle and mysql,oracle is: Oracle.jdbc.driver.OracleDriver mysql driver name is: com.mysql.jdbc.Driver)

2. Get the connection

3. Get precompiled objects,

4. Bind parameters.

5. Execute SQL

6. Get the result set and iterate through the results.

7. Close the connection.

The MySQL database is used here: the database name is as follows:

The code looks like this:

1  PackageCom.qls.mybatis.first;2 3 Importjava.sql.Connection;4 ImportJava.sql.DriverManager;5 Importjava.sql.PreparedStatement;6 ImportJava.sql.ResultSet;7 Importjava.sql.SQLException;8 9  Public classCrudjdbctest {Ten  One     /** A * Database connections are made using the pristine jdbc.  -      * @throwsSQLException -      */ the      Public Static voidMain (string[] args)throwsSQLException { -         //TODO auto-generated Method Stub -         //Connection interface, connection to a specific database.  -Connection connection=NULL; +         //Precompiled Objects -PreparedStatement preparedstatement=NULL; +         //result set AResultSet resultset=NULL; at         Try { -             //load driver: The MySQL driver is loaded here. The driver for MySQL is: Com.mysql.jdbc.Driver -Class.forName ("Com.mysql.jdbc.Driver"); -             /** - * Wms-elite Native beta is the database name of the connection - * Root: Is the user name.  in * a123456: is the password.  -              */ toconnection=Drivermanager.getconnection ( +"Jdbc:mysql://localhost:3306/wms-elite native beta? useunicode=true&characterencoding=utf8&allowmultiqueries= True,  -"Root", "a123456"); the             //get PreparedStatement object: *String sql= "Select *from user where address=?"; $Preparedstatement=connection.preparestatement (SQL);Panax Notoginseng             //Binding Parameters: -Preparedstatement.setstring (1, "Beijing"); the             //execute the query and query the results.  +resultset=preparedstatement.executequery (); A              while(Resultset.next ()) { theSystem.out.println ("username is:" +resultset.getstring ("username") + "\ n" + "Gender is:" +resultset.getstring (4)); +             } -}Catch(Exception e) { $ e.printstacktrace (); $}finally{ -             /** - * Close the database connection.  the * The Order of closing is: Resultset,preparedstatement,connection. -              */Wuyi             if(resultset!=NULL) { the                  -Resultset.close ();//Close Result set Wu             } -             if(preparedstatement!=NULL) { About                  $Preparedstatement.close ();//Close Precompiled Objects -             } -             if(connection!=NULL) { -                  AConnection.close ();//Close the connection.  +             } the              -         } $     } the  the}/*Output: the user name is: Zhang San the Gender is: 1 - *///:~

The above code basically commented on the important statements. Output Result:

User name is: 369 sex is: 1
See the following:

Use the methods in the java.sql package in the JDK for JDBC connections