Bigdecimal工具类

import java.math.BigDecimal;

public class DoubleUtils {

	/** 
	* * 两个Double数相加 * 
	*  
	* @param v1 * 
	* @param v2 * 
	* @return Double 
	*/  
	public static Double add(Double v1, Double v2) {  
	   BigDecimal b1 = new BigDecimal(v1.toString());  
	   BigDecimal b2 = new BigDecimal(v2.toString());  
	   return new Double(b1.add(b2).doubleValue());  
	}  
	  
	/** 
	* * 两个Double数相减 * 
	*  
	* @param v1 * 
	* @param v2 * 
	* @return Double 
	*/  
	public static Double sub(Double v1, Double v2) {  
	   BigDecimal b1 = new BigDecimal(v1.toString());  
	   BigDecimal b2 = new BigDecimal(v2.toString());  
	   return new Double(b1.subtract(b2).doubleValue());  
	}  
	
	/** 
	* * 两个Double数相乘 * 
	*  
	* @param v1 * 
	* @param v2 * 
	* @return Double 
	*/  
	public static Double mul(Double v1, Double v2) {  
	   BigDecimal b1 = new BigDecimal(v1.toString());  
	   BigDecimal b2 = new BigDecimal(v2.toString());  
	   return new Double(b1.multiply(b2).doubleValue());  
	}  
	  
	/** 
	* * 两个Double数相除 * 
	*  
	* @param v1 * 
	* @param v2 * 
	* @return Double 
	*/  
	public static Double div(Double v1, Double v2) {  
	   BigDecimal b1 = new BigDecimal(v1.toString());  
	   BigDecimal b2 = new BigDecimal(v2.toString());  
	   return new Double(b1.divide(b2, 2, BigDecimal.ROUND_HALF_UP).doubleValue());  
	}  
	
	
	public static Double calculate(Double supplierAmount,Double totalAmount,Double nCutMoney){
		Double d1 = mul(supplierAmount,nCutMoney);
		return div(d1,totalAmount);
	}
}

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