BiConsumer是一个函数式接口，代表一个接受两个输入参数且不返回任何内容的操作符

import java.util.ArrayList;
import java.util.List;
import java.util.function.BiConsumer;

public class BatchOperate<T> {
    private int batchSize=3000;
    private List<T> content=new ArrayList<>();
    private BiConsumer<Integer,List<T>> consumer;
    private int pageNo;
    private long total;

    public void setConsumer(BiConsumer<Integer,List<T>> consumer){
        this.consumer=consumer;
    }

    public void setBatchSize(int batchSize) {
        this.batchSize = batchSize;
    }

    public void addBatch(T t){
        this.content.add(t);
        this.total++;
        if (content.size()>=batchSize){
            this.executeBatch();
        }
    }

    public long getTotal() {
        return total;
    }

    public void executeBatch() {
        if(this.content.size()>0){
            pageNo++;
            consumer.accept(this.pageNo,this.content);
            this.content=new ArrayList<>();
        }
    }

}

使用：

private void processUser(){
	int size  = 1000;
	BatchOperate<User> batchOperate = new BatchOperate<>();
	batchOperate.setBatchSize(size);
	batchOperate.setConsumer((index, list) -> {
		log.info("######处理用户信息：{}", index);
		removeUserInfo(list);
	});

	for(int i=0; i < 9000; i++){ //生成用户放到 batchOperate
		User user = new User();
		batchOperate.addBatch(user);
	}
	batchOperate.executeBatch();
}


private void removeUserInfo(List<user> userList){
	//处理逻辑
	System.out.println(userList.size());
}