java/Android：将字符串按数量分割

分割成数组

import java.util.Arrays;

/**
 * Java将字符串按照指定长度分割成字符串数组
 */
public class StringUtils {

    public static void main(String[] args){
        String data = "227d77a7a244c7b2be3180f2d46be352f56ddf92866692f2cac797358097e5a3e90f6d20bb96bc516a4ab9c09c84ab3c05b5503a7b2c7529ee2691d5deb44b12";
        System.out.println(Arrays.toString(stringToStringArray(data, 50)));
    }
    private static String[] stringToStringArray(String src, int length){
        // 检查参数是否合法
        if(null == src || src.equals("")){
            return null;
        }
        if(length <= 0){
            return null;
        }
        // 获取整个字符串可以被切割成字符子串的个数
        int n = (src.length() + length - 1) / length;
        String[] split = new String[n];
        for(int i = 0; i < n ; i++){
            if(i < (n - 1)){
                split[i] = src.substring(i * length, (i + 1) * length);
            } else {
                split[i] = src.substring(i * length);
            }
        }
        return split;
    }
}

# 控制台输出：
[227d77a7a244c7b2be3180f2d46be352f56ddf92866692f2ca, c797358097e5a3e90f6d20bb96bc516a4ab9c09c84ab3c05b5, 503a7b2c7529ee2691d5deb44b12]

分割成list

   public static List splitStringByLength(String input, int length) {
        List result = new ArrayList<>();
        for (int i = 0; i < input.length(); i += length) {
            result.add(input.substring(i, Math.min(input.length(), i + length)));
        }
        return result;
    }

参考来源：

Java将字符串按照指定长度分割成字符串数组 - 简书