Class PlusFunction

src/main/java/com/sen/api/functions/PlusFunction.java:5–29

import java.math.BigDecimal;

public class PlusFunction implements Function{

	@Override
	public String execute(String[] args) {
		boolean isNotPoint=true;
		BigDecimal value=new BigDecimal(0);
		for(String numerial :args){
			//如果有某个参数带有“。”，即代表double类型，将返回带有小数点的值
			isNotPoint=isNotPoint&& !numerial.contains(".");
			value =value.add(new BigDecimal(numerial)); 
		}
		if(isNotPoint){
			return String.valueOf(value.longValue());
		}else{
			return String.valueOf(value);				
		}
	}

	@Override
	public String getReferenceKey() {
		// TODO Auto-generated method stub
		return "plus";
	}

}