Java读取文件和写入文件
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2020-04-01 11:26:18
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Java读取文件和写入文件
1.package com.manze.stu;
2.import java.io.*;
3.//Java教程:http://www.javaweb.cc
4.public class IOTest {
5.
6. public static void samples() throws IOException {
7.
8. //1. 这是从文件中逐行读入数据
9.
10. BufferedReader in = new BufferedReader(new FileReader("D:\\info.txt" ));
11. String s="",s2="";
12. while((s=in.readLine())!=null)
13. s2+=s+"\n";
14. in.close();
15. //2. 这是从一个字符串中逐个读入字节
16. StringReader in1 = new StringReader(s2);
17. int c;
18. while ((c = in1.read()) != -1)
19. System .out.print((char)c);
20.
21. //3. 这是将读取的字符串写入另个文件
22. try {
23. BufferedReader in2 = new BufferedReader(new StringReader(s2));
24. PrintWriter out1 = new PrintWriter(new BufferedWriter(new FileWriter("D:\\IODemo.txt" )));
25. int lineCount = 1;
26. while ((s = in2.readLine()) != null )
27. out1.println(s);
28. out1.close();
29. } catch (EOFException e) {
30. System .err.println("End of stream" );
31. }
32. }
33. public static void main(String[] arg)
34. {
35. try {
36. IOTest.samples();
37. } catch (IOException e) {
38. // TODO Auto-generated catch block
39. e.printStackTrace();
40. }
41. }
42.
43. } |
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转载自blog.csdn.net/xiaoyaGrace/article/details/105193373
