これで他の人のブログを見て私も書きます!Object変換別タイプ

package com.sinitek.framework.util;

import java.math.BigDecimal;
import java.sql.Timestamp;
import java.util.Date;

/**
 * Created by IntelliJ IDEA.
 * User: Administrator
 * Date: 2011-5-23
 * Time: 16:09:26
 * To change this template use File | Settings | File Templates.
 */
public class JdbcQueryUtils
{
/**
     *  Double
     * @param object
* @return
*/
public static Double convertToDouble( Object object )
    {
if ( object == null )
return null ;

if ( object instanceof BigDecimal )
        {
return ( ( BigDecimal )object ).doubleValue( ) ;
        }

return null ;
    }

/**
     *  String
     * @param object
* @return
*/
public static String convertToString( Object object )
    {
if ( object == null )
return null ;

if ( object instanceof String )
        {
return object.toString( )  ;
        } else {
return String.valueOf(object);
        }

    }

/**
     *  Integer
     * @param object
* @return
*/
public static Integer convertToInteger( Object object )
    {
if ( object == null )
return null ;

if ( object instanceof BigDecimal )
        {
return ( ( BigDecimal )object ).intValue( ) ;
        }

return null ;
    }

/**
     *  Date
     * @param object
* @return
*/
public static Date convertToDate( Object object )
    {
if ( object == null )
return null ;

if ( object instanceof Timestamp )
        {
return new Date( ( ( Timestamp )object ).getTime( ) ) ;
        }

return null ;
    }
}