passwordcryptfactory.java

EOS的一个很好的例子.包括页面构件、展现构件

package com.primeton.eos.fbframe.fbrole.crypt.impl;

import com.primeton.eos.fbframe.config.*;
import com.primeton.eos.fbframe.fbrole.crypt.api.*;

/**
 * @author ZhangXueyong
 * 
 * 管理可配置的加密类
 *
 */
public class PasswordCryptFactory {
	
	private static PasswordCrypt pcf ;
	
	/**
	 * 根据配置信息取得加密类 。
	 * <module name="fbframe">
	 * 		<group name="PasswordCryptImpl">
	 *			<configValuekey="classname">com.primeton.eos.fbframe.fbrole.crypt.impl.EOSDefaultPasswordCryptImpl</configValue>
	 *		</group>
	 * </module>
	 */
	private PasswordCryptFactory() {
	}

	public static PasswordCrypt getPasswordCrypt()throws Exception{
		
		if( pcf == null ){
			String imp = FbFrameConfig.getInstance().getPasswordCryptImpl();
			pcf = (PasswordCrypt)Class.forName(imp).newInstance();
		}
		return pcf;
	}
}