Object 转换为 BigDecimal

项目中遇到读取Excel文件里面的数据转为金额的情况，为了程序更加的健壮，进行处理如下:

import java.math.BigDecimal;
import java.math.BigInteger;  

public class MathUtils {  

    public static BigDecimal getBigDecimal( Object value ) {
        BigDecimal ret = null;
        if( value != null ) {
            if( value instanceof BigDecimal ) {
                ret = (BigDecimal) value;
            } else if( value instanceof String ) {
                ret = new BigDecimal( (String) value );
            } else if( value instanceof BigInteger ) {
                ret = new BigDecimal( (BigInteger) value );
            } else if( value instanceof Number ) {
                ret = new BigDecimal( ((Number)value).doubleValue() );
            } else {
                throw new ClassCastException("Not possible to coerce ["+value+"] from class "+value.getClass()+" into a BigDecimal.");
            }
        }
        return ret;
    }  

}