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。
代码实现步骤如下:
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: