策略模式

①定义规范

 

package org.fanzone.design.strategy;

 

/** 

 * Title: base<br> 

 * Description: Just a rule, which called interface.<br> 

 * Copyright: Copyright (c) 2011 <br> 

 * Create DateTime: Jun 22, 2011 7:53:11 PM <br> 

 * @author wangmeng

 */

public interface IRobort {

/**

* Be one's baby.

*/

void performTrust();

}

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②规范的不同实现

package org.mars.design.strategy;

/** 

 * Title: base<br> 

 * Description: Another implementation.<br> 

 * Copyright: Copyright (c) 2011 <br> 

 * Create DateTime: Jun 22, 2011 8:02:27 PM <br> 

 * @author wangmeng

 */

public class ProgramControlledRobort implements IRobort {

public void performTrust() {

System.out.println("According to the requirements of the numerical control in order and conditions, which in turn control of the robot mechanical action.");

}

}

package org.mars.design.strategy;

/** 

 * Title: base<br> 

 * Description: One implementation.<br> 

 * Copyright: Copyright (c) 2011 <br> 

 * Create DateTime: Jun 22, 2011 8:06:17 PM <br> 

 * @author wangmeng

 */

public class NumericalControlRobort implements IRobort {

public void performTrust() {

System.out.println("Don't make robots action, through the numerical, language on the robot, robot. Teaching according to the information and after teaching work.");

}

}

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③构建策略

package org.mars.design.strategy;

/** 

 * Title: base<br> 

 * Description: The Executor of the Strategy.<br> 

 * Copyright: Copyright (c) 2011 <br> 

 * Create DateTime: Jun 22, 2011 8:13:21 PM <br> 

 * @author wangmeng

 */

public class StrategyExecutor {

private IRobort robort;

public StrategyExecutor(){}

/**

* Constructor's rebuilding.

* @param robort -- The implementation class of the specified interface.

*/

public StrategyExecutor(IRobort robort){

this.robort = robort;

}

/**

* The action of the executor.

*/

public void operate(){

robort.performTrust();

}

}

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④根据不同的应用执行不同的策略

package org.mars.design.strategy;

/** 

 * Title: base<br> 

 * Description: Just for the testing.<br> 

 * Copyright: Copyright (c) 2011 <br> 

 * Create DateTime: Jun 22, 2011 8:10:57 PM <br> 

 * @author wangmeng

 */

public class Commissioning {

public static void main(String[] args){

/**To Build two executor of the strategy with the specified implementation class of the interface.*/

StrategyExecutor executorOne = new StrategyExecutor(new NumericalControlRobort());

StrategyExecutor executorTwo = new StrategyExecutor(new ProgramControlledRobort());

/**Just do the action.*/

executorOne.operate();

executorTwo.operate();

}

}