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();}
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本文标题: java多线程读取多个文件的方法
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