java_I/O_合并流（SequenceInputStream）

Posted 2020-12-25 -chang

1. package testjava_13;
2. import java.io.File;
3. import java.io.FileInputStream;
4. import java.io.FileOutputStream;
5. import java.io.IOException;
6. import java.io.InputStream;
7. import java.io.OutputStream;
8. import java.io.SequenceInputStream;
9. public class SequenceDemo {
10. public static void main(String[] args) throws IOException {
11. //声明两个文件读入流
12. File inputFile1 = createFile("E:"+File.separatorChar+"mytest"+File.separatorChar+"1.txt");
13. File inputFile2 = createFile("E:"+File.separatorChar+"mytest"+File.separatorChar+"2.txt");
14. File outputFile = createFile("E:"+File.separatorChar+"mytest"+File.separatorChar+"12.txt");
16. InputStream inputStream1 = new FileInputStream(inputFile1),
17. inputStream2=new FileInputStream(inputFile2);
18. OutputStream outputStream = new FileOutputStream(outputFile);
19. SequenceInputStream seInputStream = new SequenceInputStream(inputStream1,inputStream2);
20. int c=-1;
21. while ((c=seInputStream.read())!=-1) {
22. outputStream.write(c);
23. }
24. inputStream1.close();
25. inputStream2.close();
26. outputStream.close();
27. System.out.print("Ok~!");
28. }
30. //根据路径创建File
31. private static File createFile(String filePath) {
32. File file = new File(filePath);
33. if (!file.getParentFile().exists()) { //如果父级路径不存在就创建父级目录
34. file.getParentFile().mkdirs();
35. if (!file.exists()) { //如果文件不存在就创建文件
36. try {
37. file.createNewFile();
38. } catch (IOException e) {
39. e.printStackTrace();
40. }
41. }
42. }
43. return file;
44. }
45. }