Java 函数式接口BiConsumer

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 batchOperateUser user = new User();batchOperate.addBatch(user);}batchOperate.executeBatch();
}private void removeUserInfo(List<user> userList){//处理逻辑System.out.println(userList.size());
}