Guava学习笔记-Lists

学习Elastic-Job - 分布式定时任务框架

源码查看多线程分片操作时工具类采用集合类Google Guava包进行list的分组操作

//均分为每个子list大小为2的嵌套list
Lists.partition() 

    可利用此工具分组list操作

package com.dangdang.ddframe;

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

import com.google.common.collect.Lists;

public class Test {

    class Foo {

        private int id;

        private String name;

        public Foo(int id, String name) {
            this.id = id;
            this.name = name;
        }

        public int getId() {
            return id;
        }

        public void setId(int id) {
            this.id = id;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        @Override
        public String toString() {
            return "Foo [id=" + id + ", name=" + name + "]";
        }

    }

    public static void main(String[] args) {

        List<Foo> data = new ArrayList<Foo>();
        for (int i = 0; i < 20; i++) {
            Test.Foo f = new Test().new Foo(i, i + "名称");
            data.add(f);
        }

        List<List<Foo>> splitData = Lists.partition(data, data.size() / 10);
        System.out.println("分组数量：" + data.size() / 10);
        System.out.println(splitData.size());
        for (int i = 0; i < splitData.size(); i++) {
            System.out.println("分组:" + i);
            // List<Foo> s = splitData.get(i);
            System.out.println(splitData.get(i).toString());
        }

    }
}