Java程序调用MySQL数据库实例代码

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
public class MySQLTest {
public static void main(String[] args) {
// TODO Auto-generated method stub
Connection conn = null;
try
{
String userName = "username";
String password = "password";
String url = "jdbc:mysql://localhost/test";
Class.forName ("com.mysql.jdbc.Driver").newInstance ();
conn = DriverManager.getConnection (url, userName, password);
System.out.println ("Database connection established");
PreparedStatement pstmt;
ResultSet rset;
pstmt = conn.prepareStatement("select count(*) from testtable");
rset=pstmt.executeQuery();
while (rset.next()){
System.out.println (rset.getString(1)); // Print col 1
}
}
catch (Exception e)
{
System.err.println ("Cannot connect to database server");
}
finally
{
if (conn != null)
{
try
{
conn.close ();
System.out.println ("Database connection terminated");
}
catch (Exception e) { /* ignore close errors */ }
}
}
}
}

补充：软件开发 , Java ,