任务分线程实现（java）

• Z时代
• 2024-01-10
• 分类：综合

1、创建一个类，用户存储信息

public class Users {
    private String userid;
    private String username;
    public Users() {
    }
    public Users(String userid, String username) {
        this.userid = userid;
        this.username = username;
    }
    @Override
    public String toString() {
        return "Users{" +
                "userid='" + userid + '\'' +
                ", username='" + username + '\'' +
                '}';
    }
    public String getUserid() {
        return userid;
    }
    public void setUserid(String userid) {
        this.userid = userid;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
}

2、进行分页，任务分阶段

/**
     * 分页
     * @param list
     * @param pageSize
     * @param <T>
     * @return
     */
    public static <T> List<List<T>> splitList(List<T> list, int pageSize) {
        int listSize = list.size();
        System.out.println(listSize);
        int page = (listSize + (pageSize - 1)) / pageSize; //分多少页
        List<List<T>> listArray = new ArrayList<>();   //用于存放页码，和页面中存放的值
        for (int i = 0; i < page; i++) {
            List<T> subList = new ArrayList<>();
            for (int j = 0; j < listSize; j++) {
                int pageIndex = ((j + 1) + (pageSize - 1)) / pageSize;
                if (pageIndex == (i + 1)) {
                    subList.add(list.get(j));
                }
                if ((j + 1) == ((j + 1) * pageSize)) {
                    break;
                }
            }
            listArray.add(subList);
        }
        return listArray;
    }

3、创建线程，并测试

public class Test {
    /**
     * 初始化用户信息
     *
     * @return
     */
    public static List<Users> initUser() {
        List<Users> listUser = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            listUser.add(new Users("userId:" + i, "userName:" + i));
        }
        return listUser;
    }
    /**
     * 分页
     * @param list
     * @param pageSize
     * @param <T>
     * @return
     */
    public static <T> List<List<T>> splitList(List<T> list, int pageSize) {
        int listSize = list.size();
        System.out.println(listSize);
        int page = (listSize + (pageSize - 1)) / pageSize; //分多少页
        List<List<T>> listArray = new ArrayList<>();   //用于存放页码，和页面中存放的值
        for (int i = 0; i < page; i++) {
            List<T> subList = new ArrayList<>();
            for (int j = 0; j < listSize; j++) {
                int pageIndex = ((j + 1) + (pageSize - 1)) / pageSize;
                if (pageIndex == (i + 1)) {
                    subList.add(list.get(j));
                }
                if ((j + 1) == ((j + 1) * pageSize)) {
                    break;
                }
            }
            listArray.add(subList);
        }
        return listArray;
    }
    public static void main(String[] args) {
        //1、初始化数据
        List<Users> users = initUser();
        //2、每次发送数据
        int userCount = 2;
        //3、分段数据
        List<List<Users>> lists = splitList(users, 2);
        for (int i = 0; i < lists.size(); i++) {
            List<Users> users1 = lists.get(i);
            //4、创建线程
            new Thread(new Runnable() {
                @Override
                public void run() {
                    for (Users listusers : users1) {
                        try {
                            Thread.sleep(500);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        System.out.println("name: "+Thread.currentThread().getName()+"   "+listusers);
                    }
                }
            }).start();
            //System.out.println("i: " + i + "---" + users1);
        }
    }
}

4、测试结果

name: Thread-0   Users{userid='userId:0', username='userName:0'}
name: Thread-2   Users{userid='userId:4', username='userName:4'}
name: Thread-1   Users{userid='userId:2', username='userName:2'}
name: Thread-3   Users{userid='userId:6', username='userName:6'}
name: Thread-4   Users{userid='userId:8', username='userName:8'}
name: Thread-2   Users{userid='userId:5', username='userName:5'}
name: Thread-0   Users{userid='userId:1', username='userName:1'}
name: Thread-3   Users{userid='userId:7', username='userName:7'}
name: Thread-1   Users{userid='userId:3', username='userName:3'}
name: Thread-4   Users{userid='userId:9', username='userName:9'}

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