简单的线程池实现多线程对大文件的读取

上代码

package ThreadLearning;

import java.io.*;
import java.util.ArrayList;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**

• @author kyojurorengoku
• @date 2022/1/20
• @Description
  */

public class LstFileAnalysis {

static String fileUrl = "";
static File file = new File(fileUrl);
static InputStreamReader isr;

static {
    try {
        isr = new InputStreamReader(new FileInputStream(file));
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
}

public static void main(String[] args) throws IOException {
    ExecutorService executorService = Executors.newFixedThreadPool(4);
    BufferedReader read = new BufferedReader(isr);
    String line = "";
    long l = System.currentTimeMillis();
    while ((line = read.readLine()) != null) {
        String[] split = line.split("\s+");
        if (split.length == 0) {
            break;
        }
        Runnable task = new Task(line);
        executorService.execute(task);
    }
    long l1 = System.currentTimeMillis();
    System.out.println((l1 - l));
}

}
复制代码
Task类 提供一个简单的思路： 1、读取出来的数据处理过后存入数据库[写在run方法里就行]

package ThreadLearning;

import java.util.List;

/**

• @author kyojurorengoku
• @date 2022/1/20
• @Description
  */

public class Task implements Runnable {

private String line;

public Task(String line) {
    this.line = line;
}

@Override
public void run() {

// System.err.println(Thread.currentThread().getName() + " " + line);

}

}
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