JCIFS读取远程服务器文件过慢的解决方法

 
 

 

与windows explorer打开相同的文件相比，JCIFS默认情况下要慢太多了。我找了大半天，总算找出了解决方法，增加如下配置，则读取速度会有质的飞跃，我这边从7s提升至0.2s：

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System.setProperty("jcifs.smb.client.dfs.disabled", "true");
至于原因嘛，我也不知道，我是从此网站捞到的一条配置：

 

http://samba.2283325.n4.nabble.com/Peformance-questions-td4644647.html

执行程序代码如下：

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private static final int BUFFER_SIZE = 1024;
 public static void main(String[]args) throws Exception {
    //SmbFile file = new SmbFile("smb://finchina;daieel:123456@192.168.100.246/Soft/sc8 key.txt");     //SmbFile file = new SmbFile("smb://10.15.97.181/xx部资料库/工作文档/查询逻辑.txt");d     //http://samba.2283325.n4.nabble.com/Peformance-questions-td4644647.html     System.setProperty("jcifs.smb.client.dfs.disabled", "true");
         
    long startTime = System.currentTimeMillis();
    UniAddress dc = UniAddress.getByName("192.168.100.5");  
    NtlmPasswordAuthentication authentication = new NtlmPasswordAuthentication("fgina", "xiajl", "orange");  
    SmbSession.logon(dc, authentication);  
    SmbFile file = new SmbFile("smb://192.168.100.5/edse/users.txt",  authentication);  
      
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    BufferedInputStream in = new BufferedInputStream(new SmbFileInputStream(file));
    //SmbFileInputStream in = new SmbFileInputStream(file) ;  //建立smb文件输入流     byte buffer[] = new byte[BUFFER_SIZE] ;
    int count = -1; 
    while((count = in.read(buffer,0,BUFFER_SIZE)) != -1) {
        out.write(buffer, 0, count);
    }
    String content = new String(out.toByteArray(),"GBK");
    in.close();
    System.out.println(System.currentTimeMillis() - startTime);
      
    System.out.println(content);
}