本文实例为大家分享了JDBC建立数据库连接的具体代码,供大家参考,具体内容如下
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import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import com.mysql.jdbc.Connection;
import com.mysql.jdbc.PreparedStatement;
public class Test {
public static void main(String[] args) {
//声明Connection对象
Connection conn = null ;
PreparedStatement preparedStatement = null ;
ResultSet resultSet = null ;
//驱动程序名
String driver = "com.mysql.jdbc.Driver" ;
//用户名
String user = "root" ;
//密码
String password = "1234" ;
//url
String url = "jdbc:mysql://localhost:3306/db_person" ;
try {
String sql = "SELECT * FROM student" ;
//1.加载驱动
Class.forName(driver);
//2.获得connect连接
conn = (Connection) DriverManager.getConnection(url, user, password);
//3.获得PreparedStatement
preparedStatement = (PreparedStatement) conn.prepareStatement(sql);
//4.获得结果集
resultSet = preparedStatement.executeQuery();
while (resultSet.next()) {
int id = resultSet.getInt( 1 );
String name = resultSet.getString( 2 );
String sex = resultSet.getString( 3 );
int age = resultSet.getInt( 4 );
System.out.println(id + " " + name + " " + sex + " " + age);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (resultSet != null ) {
try {
resultSet.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (preparedStatement != null ) {
try {
preparedStatement.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (conn != null ) {
try {
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://www.cnblogs.com/SkyeAngel/p/7864823.html