简单好用的批量执行工具-Java

批量执行任务时，总是需要关注许多的边界问题

比如需要打印1-100的数字，每一批10个

List workList = new ArrayList<>();
for (int i = 0; i < 100; i++) {
     workList.add(i + 1);
}

BatchUtil.process(10, workList, 
		(list) -> {
            System.out.println(list);
        });

使用lamada简写

BatchUtil.process(10, workList, System.out::println);

package com.seewoedu.train.utils;

import java.util.List;


public class BatchUtil {

    
    public static  void process(int batchSize,
                                   List workList,
                                   BatchFunction function) {
        if (batchSize <= 0) {
            return;
        }
        int index = 0;
        int totalSize = workList.size();
        while (index < totalSize) {
            if (index + batchSize > totalSize) {
                function.execute(workList.subList(index, totalSize));
            } else {
                function.execute(workList.subList(index, index + batchSize));
            }

            index += batchSize;
        }
    }

    @FunctionalInterface
    public  interface  BatchFunction {
        void execute(List list);
    }
}