多线程（十）使用多线程分批处理信息

刺骨的言语ヽ痛彻心扉 2022-03-02 07:22 466阅读 0赞

### 需求分析：现在银行有一批10万的用户，需要给每个用户发一条短信 应该怎么做？假如每条短信的发送时间是1秒 使用单线程 就是10万秒 这时候我们可以用多线程分批处理。 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L09ubHlvbmVGcmlzdA_size_16_color_FFFFFF_t_70][]

### 代码实现步骤如下： ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L09ubHlvbmVGcmlzdA_size_16_color_FFFFFF_t_70 1][]

### 代码如下： ###

### 实体类 ###

package org.Thread_batch.pojo;
    /**
     * 功能描述（用户的实体类）
     * @author zuojie
     *
     */
    
    public class User {
    	private String userId;
    	private String userName;
    	
    	public User(String userId, String userName) {
    		super();
    		this.userId = userId;
    		this.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;
    	}
    	@Override
    	public String toString() {
    		return "User [userId=" + userId + ", userName=" + userName + "]";
    	}
    	
    	
    
    }

### 工具类 ###

package org.Thread_batch;
    
    import java.util.ArrayList;
    import java.util.List;
    
    public class ListUtils {
    	/**
    	 * 
    	 * @param list
    	 * @param pageSize
    	 * @return
    	 * @param list 切割集合
    	 * @param pageSize 分页长度
    	 * @return List<List<T>>返回分页数据
    	 */
    
    	static public <T> List<List<T>> splitList(List<T> list, int pageSize) {
    		int listSize = list.size();
    		int page = (listSize + (pageSize - 1)) / pageSize;
    		List<List<T>> listArray = new ArrayList<List<T>>();
    		for (int i = 0; i < page; i++) {
    			List<T> subList = new ArrayList<T>();
    			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;
    	}
    }

### 实现类 ###

package org.Thread_batch;
    
    import java.util.ArrayList;
    import java.util.List;
    
    import org.Thread_batch.pojo.User;
    class UserSendThread implements Runnable {
    	private List<User> listUser;
    	public UserSendThread(List<User> listUser) {
    		this.listUser=listUser;
    	}
    	public void run() {
    		for (User user : listUser) {
    			System.out.println(Thread.currentThread().getName()+","+user.toString());
    		}
    		System.out.println();
    	}
    }
    
    public class BatchSms {
    	
    	public static void main(String[] args) {
    		//1.初始化数据
    		List<User>initUser=initUser();
    		//2.定义每个线程分批发送大小
    		int userCount = 2;
    		//3.计算每个线程需要分配的数据
    		List<List<User>> splitList = ListUtils.splitList(initUser, userCount);
    		for (int i = 0; i < splitList.size(); i++) {
    			List<User> list = splitList.get(i);
    			UserSendThread userSendThread = new UserSendThread(list);
    			//4.分配发送
    			Thread thread = new Thread(userSendThread,"线程"+i);
    			thread.start();
    		}
    		
    	}
    	private static List<User> initUser(){
    	List<User>users=new ArrayList<User>();
    	for (int i = 0; i < 20; i++) {
    		users.add(new User("userId"+i, "userName"+i));
    	}
    		return users;
    	}
    
    }

### 运行结果： ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L09ubHlvbmVGcmlzdA_size_16_color_FFFFFF_t_70 2][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L09ubHlvbmVGcmlzdA_size_16_color_FFFFFF_t_70]: /images/20220302/e516cc50e4fa4a449d1d75867f9345a4.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L09ubHlvbmVGcmlzdA_size_16_color_FFFFFF_t_70 1]: /images/20220302/068ada090f584395bb03eccc455d0205.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L09ubHlvbmVGcmlzdA_size_16_color_FFFFFF_t_70 2]: /images/20220302/2b9eb45a17fa4d9c9d5a20b9e382621e.png