/*
* 使用递归的方式求解
*/
public static double Power2(double base,int exponent) {
if(base == 0 && exponent < 0) {
throw new RuntimeException("分母不能为零啊");
} else if(exponent == 0) {
return 1;
} else if(exponent < 0) {
return 1 / base * Power2(base, exponent + 1);
} else {
return base * Power2(base, exponent - 1);
}
}原文：http://blog.51cto.com/12222886/2060999