numberutil.java

struts+spring+hibernate自创框架

package com.pegasus.framework.util;

import java.util.List;

public class NumberUtil {
	
	public static int compare(Double a,Double b) {
		if(a == null && b == null) {
			return 0;
		}else if(a == null && b != null) {
			return 1;
		}else if(a != null && b == null) {
			return 1;
		} else {
			return a.compareTo(b);
		}
	}
	
	public static int compare(Long a,Long b) {
		if(a == null && b == null) {
			return 0;
		}else if(a == null && b != null) {
			return 1;
		}else if(a != null && b == null) {
			return 1;
		} else {
			return a.compareTo(b);
		}
	}

	
	public static Double minus(Double a,Double b) {
		if(a == null) {
			a = new Double(0);
		}
		if(b == null) {
			b = new Double(0);
		}
		
		return new Double(b.doubleValue() - a.doubleValue());
	}
	
	public static Double plus(Double a,Double b) {
		if(a == null) {
			a = new Double(0);
		}
		if(b == null) {
			b = new Double(0);
		}
		
		return new Double(b.doubleValue() + a.doubleValue());
	}
	
	public static Double plus(Double a,Double b,Double c) {
		if(a == null) {
			a = new Double(0);
		}
		if(b == null) {
			b = new Double(0);
		}
		if(c == null) {
			c = new Double(0);
		}
		
		return new Double(b.doubleValue() + a.doubleValue() + c.doubleValue());
	}
	
	public static Double plus(Double a,Double b,Double c,Double d) {
		if(a == null) {
			a = new Double(0);
		}
		if(b == null) {
			b = new Double(0);
		}
		if(c == null) {
			c = new Double(0);
		}
		
		if(d == null) {
			d = new Double(0);
		}
		
		return new Double(b.doubleValue() + a.doubleValue() + c.doubleValue() + d.doubleValue());
	}
	
	public static Double plus(List<Double> srcList) {
		if(srcList == null) return null;
		Double result = new Double(0);
		for(Double a : srcList) {
			if(a == null) {
				a = new Double(0);
			}
			result = plus(result,a);
		}
		
		return result;
	}
	
	public static Double getValue(Double value) {
		if(value == null) return new Double(0);
		return value;
	}
	
	public static Long getValue(Long value) {
		if(value == null) return new Long(0);
		return value;
	}
	
	
	
	
	
	
	
	
	
	
	
	
	
	
}