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标题: TCP上传图片怎么变小了 [打印本页]
作者: 古银平    时间: 2012-10-31 23:07
标题: TCP上传图片怎么变小了
本帖最后由 古银平 于 2012-11-5 11:57 编辑
  1. import java.net.*;
  2. import java.io.*;
  3. class PicClient {
  4. public static void main(String[] args)
  5. {
  6. Socket s = null;
  7. try {
  8. s = new Socket("192.168.1.101",10001);
  9. } catch (UnknownHostException e) {
  10. // TODO Auto-generated catch block
  11. e.printStackTrace();
  12. } catch (IOException e) {
  13. // TODO Auto-generated catch block
  14. e.printStackTrace();
  15. }
  16. BufferedInputStream bis = null;
  17. BufferedOutputStream bosOut = null;
  18. BufferedReader brIn = null;
  19. try {
  20. bosOut = new BufferedOutputStream(s.getOutputStream());
  21. brIn = new BufferedReader(new InputStreamReader(s.getInputStream()));
  22. } catch (IOException e1) {
  23. // TODO Auto-generated catch block
  24. e1.printStackTrace();
  25. }
  26. try {
  27. bis = new BufferedInputStream(new FileInputStream("d:\\1.jpg"));
  28. } catch (FileNotFoundException e) {
  29. // TODO Auto-generated catch block
  30. e.printStackTrace();
  31. }

  33. try {
  34. int buf = 0;
  35. while ((buf = bis.read())!=-1)
  36. {
  37. bosOut.write(buf);
  38. }
  39. } catch (IOException e) {
  40. // TODO Auto-generated catch block
  41. e.printStackTrace();
  42. }
  43. try {
  44. s.shutdownOutput();
  45. } catch (IOException e) {
  46. // TODO Auto-generated catch block
  47. e.printStackTrace();
  48. }
  49. try {
  50. String str = brIn.readLine();
  51. System.out.println("Server"+str);
  52. } catch (IOException e) {
  53. // TODO Auto-generated catch block
  54. e.printStackTrace();
  55. }
  56. finally
  57. {
  58. try {
  59. bis.close();
  60. s.close();
  61. } catch (IOException e) {
  62. // TODO Auto-generated catch block
  63. e.printStackTrace();
  64. }
  65. }
  66. }

  68. <DIV class=blockcode>
  69. <BLOCKQUOTE>import java.net.*;
  70. import java.io.*;
  71. class picServer {
  72. public static void main(String[] args)
  73. {
  74. ServerSocket ss = null;
  75. try {
  76. ss = new ServerSocket(10001);
  77. } catch (IOException e) {
  78. // TODO Auto-generated catch block
  79. e.printStackTrace();
  80. }
  81. Socket s = null;
  82. try {
  83. s = ss.accept();
  84. String ip = s.getInetAddress().getHostAddress();
  85. System.out.println(ip+"........connected");

  87. } catch (IOException e) {
  88. // TODO Auto-generated catch block
  89. e.printStackTrace();
  90. }
  91. BufferedInputStream bisIn = null;
  92. BufferedOutputStream bos = null;
  93. BufferedWriter bwOut = null;
  94. try {
  95. bisIn = new BufferedInputStream(s.getInputStream());
  96. bos = new BufferedOutputStream(new FileOutputStream("d:\\2.jpg"));
  97. bwOut = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
  98. } catch (IOException e) {
  99. // TODO Auto-generated catch block
  100. e.printStackTrace();
  101. }

  103. try {
  104. int buf = 0;
  105. while((buf = bisIn.read())!=-1)
  106. {
  107. bos.write(buf);

  109. }
  110. bwOut.write("上传成功！");
  111. bwOut.newLine();
  112. bwOut.flush();
  113. } catch (IOException e) {
  114. // TODO Auto-generated catch block
  115. e.printStackTrace();
  116. }

  118. finally
  119. {
  120. try {
  121. bwOut.close();
  122. s.close();
  123. ss.close();
  124. } catch (IOException e) {
  125. // TODO Auto-generated catch block
  126. e.printStackTrace();
  127. }
  128. }





  134. }

  136. }
复制代码
}
结果为什么，图片变小了啊，

未命名.jpg (9.63 KB, 下载次数: 11)

未命名.jpg
作者: 卍解    时间: 2012-11-4 20:37
名字不一样也有能导致大小不一样，试试储存时名字一样，看大小是不是一样大。
作者: 王晓州    时间: 2012-11-5 10:23

字符流内部封装了数组，先读取两个字节查码表后刷新。
而字节流因为本身就是字节所以不用刷新，但你用的是字节流缓冲区，而在服务端读取客户端发送的数据时，客户端的流并没有关闭，所以要用到flush()方法。
故37行后面加一句bosOut.flush();就OK了。
至于服务端可加可不加，因为最后服务端关闭了流。





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