java多线程读取多个文件

本文实例为大家分享了java多线程读取多个文件的具体代码,供大家参考,具体内容如下

工具类代码如下:

import java.io.*;

import java.util.List;

import java.util.concurrent.CountDownLatch;

/**

* 多线程读取多个文件

*/

public class FileThread extends Thread{

private final CountDownLatch countDownLatch = new CountDownLatch(10);

private int fileIndex;

private List<String> filelist;

private String filepath = "D:\\LocalFtpServer\\data20181229\\";

private String movepath = "D:\\LocalFtpServer\\data20181229_01\\";

public int getFileIndex() {

return fileIndex;

}

public void setFileIndex(int fileIndex) {

this.fileIndex = fileIndex;

}

public List<String> getFilelist() {

return filelist;

}

public void setFilelist(List<String> filelist) {

this.filelist = filelist;

}

@Override

public void run() {

for (int i = 0; i < filelist.size(); i++) {

if (i % 10 == fileIndex) {

//读取文件

File readfile = new File(filepath + filelist.get(i));

InputStreamReader isr = null;

try {

isr = new InputStreamReader(new FileInputStream(readfile), "UTF-8");

BufferedReader reader = new BufferedReader(isr);

String line = null;

// 一次读入一行,直到读入null为文件结束

while ((line = reader.readLine()) != null) {

System.out.println(line );

}

reader.close();

isr.close();

} catch (UnsupportedEncodingException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

//读取完后, 移动文件位置

readfile.renameTo(new File(movepath + readfile.getName()));

}

}

countDownLatch.countDown();

}

}

调用测试:

 public static void main(String[] args) throws IOException {

String filepath = "D:\\LocalFtpServer\\data20181229\\";

File file = new File(filepath);

//读取目录下所有文件

String[] filelist = file.list();

List<String> fList=new ArrayList<String>();

for (int i = 0; i < filelist.length; i++) {

if (filelist[i].startsWith("data") && filelist[i].endsWith(".txt")) {

fList.add(filelist[i]);

}

}

for(int i=0;i<30;i++){

FileThread fileThread=new FileThread();

fileThread.setFileIndex(i);

fileThread.setFilelist(fList);

fileThread.start();

}

countDownLatch.await();

}

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

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