为什么return之后不能终止程序，方法还在执行

Question

public static int search(int[] array,int left,int right,int target){
    if (left>right||target<array[0]||target>array[array.length-1]){
        return -1;
    }
    int mid =left + (right-left)*(target-array[left])/(array[right]-array[left]);
    int midvalue = array[mid];
    while (left<right){
        if (midvalue==target){
            break;
        }else if(midvalue>target){
            search(array,left,mid-1,target);
        }else {
            search(array,mid+1,right,target);
        }
    }
    return mid;
}

Answer 1

循环多余了，left和right值在当层递归无改变导致死循环。