Groovy计算个人所得税。

def salary=7200;
def tax=0.00;
//只定义到了第5档，这个已经很难达到了
def taxRateMap=[3500:0.03,5000:0.1,8000:0.2,12500:0.25,38500:0.3];

def lastRate=0.0;
def lastLevel=0.0;
taxRateMap.each{level,value-> 
  if(salary<=level)
    {
      tax+=(salary-lastLevel)*lastRate;
      lastRate=0.0;
    }
   else
   {
    tax+=(level-lastLevel)*lastRate;
    lastLevel=level;
    lastRate=value;
   }
};

print "According to the national tax law of China, you should pay tax: ${tax}";