Android开发之策略模式初探

       首先,我们建立一个抽象类RepTempRule 定义一些公用变量和方法:

public abstract class RepTempRule{
 protected String oldString"; 
 protected String newString; 
public void setOldString(String oldString){

this.oldString=oldString;
 }

public String getNewString(){
 return newString; 
}
public abstract void replace() throws Exception; 
}

public class RepTempRuleOne extends RepTempRule{

 public void replace() throws Exception{
   newString=oldString.replaceFirst("aaa", "bbbb")
   //replaceFirst是jdk有的方法
 System.out.println("this is replace one"); 
} 
}

public class RepTempRuleSolve {
private RepTempRule strategy;
public RepTempRuleSolve(RepTempRule rule){ 
   //构造方法
    this.strategy=rule;
 }
public String getNewContext(Site site,String oldString) 
{ 
     return strategy.replace(site,oldString); 
}
    //变化算法
public void changeAlgorithm(RepTempRule newAlgorithm) { 
      strategy = newAlgorithm; 
}
}

RepTempRuleSolve solver=new RepTempRuleSolve(new RepTempRuleSimple()); 
solver.getNewContext(site,context);
//使用第二套
solver=new RepTempRuleSolve(new RepTempRuleTwo()); 
solver.getNewContext(site,context);

Android开发之策略模式初探,布布扣,bubuko.com

Android开发之策略模式初探

原文：http://blog.csdn.net/gerogelin/article/details/38655809