Java学习-线程池

借助线程池同步查找文件内容

目标：根据给出的目录地址，要求查找目录下所有指定后缀名suffix的文件，若包含指定字符串，则打印该文件地址。

package multiplethread;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

public class TestMultithread {
    public static void main(String[] args) {
        String path = "F:\project\javastudy";
        String suffix = ".java";
        usingThreadPool utp = new usingThreadPool();
        utp.search(path, "Magic", suffix);
    }

    static class usingThreadPool {
        ThreadPoolExecutor threadPool = new ThreadPoolExecutor(10, 15, 60, TimeUnit.SECONDS,
                new LinkedBlockingQueue<>());

        // 使用多线程进行文件内容搜索
        public void runThreadPool(File x, String content) {
            threadPool.execute(new Runnable() {
                // 每个具体线程要干的事：查找某个文件内容是否含有content字符串
                @Override
                public void run() {
                    // TODO Auto-generated method stub
                    try (BufferedReader br = new BufferedReader(new FileReader(x));) {
                        while (true) {
                            String line = br.readLine();
                            if (line == null)
                                break;
                            if (line.contains(content)) {
                                System.out.printf("找到目标字符串 %s ,在文件%s%n", content, x.getAbsoluteFile());
                                break; // 只要文件含有content，不管出现多少次，只打印一次文件地址
                            }
                        }
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
            });
        }

        public void search(String path, String content, String suffix) {
            File f = new File(path);
            File[] fs = f.listFiles();
            for (File x : fs) {
                if (x.isDirectory())
                    search(x.getAbsolutePath(), content, suffix);
                else if (x.isFile() && x.getName().contains(suffix)) // 仅仅搜索包含后缀suffix的文件
                    runThreadPool(x, content);// 使用多线程进行文件内容搜索
            }
        }
    }

}

效果图：