java 拆分数组大小，按指定数组的个数，数组的大小拆分，拆分成n个数组

package com.focusorder.mirror.utils;

import java.util.ArrayList;
import java.util.List;

public class SplitArray {
	public static void main(String[] args) throws InterruptedException {
		List<String> tarArr = new ArrayList<String>();
		for (int i = 0; i < 752; i++) {
			tarArr.add("a" + i);
		}
		
		 List<List<String>> result = createListByNumber(tarArr, 3);
		 for (List<String> subArr : result) {
			 System.err.println(subArr.size());
		 }

	}

	/**
	 * 分解数组：按每个子数组的大小，List=100，指定子数组大小=50，截取成共2个数组
	 * @param targe
	 * @param size
	 * @return
	 */
	public static <T> List<List<T>> createListBySize(List<T> targe, int size) {
		List<List<T>> listArr = new ArrayList<List<T>>();
		// 获取被拆分的数组个数
		int arrSize = targe.size() % size == 0 ? targe.size() / size : targe.size() / size + 1;
		for (int i = 0; i < arrSize; i++) {
			List<T> sub = new ArrayList<T>();
			// 把指定索引数据放入到list中
			for (int j = i * size; j <= size * (i + 1) - 1; j++) {
				if (j <= targe.size() - 1) {
					sub.add(targe.get(j));
				}
			}
			listArr.add(sub);
		}
		return listArr;
	}
	
	/**
	 * 分解数组：按每个子数组的个数，List=100，指定子数组个数=5，截取成每个数组大小=20
	 * @param targe
	 * @param number
	 * @return
	 */
	public static <T> List<List<T>> createListByNumber(List<T> targe, int number) {
		if (targe.size() < number) return null;
		List<List<T>> listArr = new ArrayList<List<T>>();
		// 获取被拆分的数组个数
		for (int i = 0; i < number; i++) {
			List<T> sub = targe.subList(i * (targe.size() / number), i == number - 1 ? (targe.size()) : i * (targe.size() / number) + targe.size() / number);
			listArr.add(sub);
		}
		return listArr;
	}
}