java使用新的(nio)遍历文件（支持文件后缀名、文件名正则表达式匹配）

1import org.junit.Test;
2
3import java.io.IOException;
4import java.nio.file.Files;
5import java.nio.file.Path;
6import java.nio.file.Paths;
7import java.util.List;
8
9public class TestParseJson {
10    @Test
11    public void test() throws IOException {
12        Path startingDir = Paths.get("f:\\temp");
13        FindFileVisitor filterFilesVisitor= new FindFileVisitor(".wav","\\d+{13}");
14
15        Files.walkFileTree(startingDir, filterFilesVisitor);
16
17        List<Path> files = filterFilesVisitor.getFilenameList();
18        System.out.println(files);
19    }
20}
21
22import java.nio.file.FileVisitResult;
23import java.nio.file.Path;
24import java.nio.file.SimpleFileVisitor;
25import java.nio.file.attribute.BasicFileAttributes;
26import java.util.LinkedList;
27import java.util.List;
28
29class FindFileVisitor extends SimpleFileVisitor<Path> {
30
31    private List<Path> filenameList = new LinkedList<>();
32    private String fileSuffix = null;
33    private String pattern = null;
34
35    public FindFileVisitor(String fileSuffix) {
36        this.fileSuffix = fileSuffix;
37    }
38
39    public FindFileVisitor(String fileSuffix,String pattern)
40    {
41        this(fileSuffix);
42        this.pattern = pattern;
43    }
44
45    public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
46
47        String absPath = file.toString();
48
49        Path fileName = file.getFileName();
50
51        if (absPath.endsWith(fileSuffix)) {
52
53            if(pattern != null)
54            {                //正则表达式+文件后缀名匹配整个文件名                //例如pattern \\d{13}  后缀.wav组成新的表达式  "\\d{13}\\.wav"
55                if(!fileName.toString().matches(pattern + fileSuffix))
56                {
57                    return FileVisitResult.CONTINUE;
58                }
59            }
60            filenameList.add(file.normalize());
61        }
62        return FileVisitResult.CONTINUE;
63    }
64
65    public List<Path> getFilenameList() {
66        return filenameList;
67    }
68}

输出结果