java多現場讀取list

苹果芒發表於2024-03-28
Java

1.需要一個執行緒類

package com.cdncp.testautomation.control.conf;

import org.apache.commons.lang.ArrayUtils;

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

public class HandleThread extends Thread{
    private String threadName;
    private List<String> data;

    public HandleThread(String threadName, List<String> data) {
        this.threadName = threadName;
        this.data = data;
    }

    public void run() {
        // TODO 這裡處理資料
//        data.subList(start, end).add("^&*");

        System.out.println(threadName);
        System.out.println(data);
    }

}

2.需要一個呼叫類

package com.cdncp.testautomation.control.conf;

import io.swagger.models.auth.In;

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

public class Test_4 {
    /**
     * 多執行緒處理list
     *
     * @param data      資料list
     * @param threadNum 執行緒數
     */
    public synchronized void handleList(List<String> data, int threadNum) {
        int len=data.size();
//        System.out.println((double)len/threadNum);
        int interval= (int)Math.ceil((double)len/threadNum);
        System.out.println("interval:"+interval);

        for (int i = 0; i < threadNum; i++) {
//            System.out.println("AA:"+i*interval);
//            System.out.println("BB:"+(interval*(i+1)-1));
            int end=interval*(i+1);

            HandleThread thread = new HandleThread("執行緒[" + (i + 1) + "] ", data.subList(i*interval,end > len? len:end));
            thread.start();
        }
    }

    public static void main(String[] args) {
        Test_4 test = new Test_4();
        // 準備資料
        List<String> data = new ArrayList<String>();
        for (int i = 0; i < 50; i++) {
            data.add("item" + i);
        }
        test.handleList(data, 6);
//        System.out.println(ArrayUtils.toString(data));
    }
}

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