Java-如果同样的方法返回'FileInputStream`

Question

Sonar显示下面的代码是阻塞类型的错误，那么如何在finally块中关闭FileInputStream？这是抱怨我没有关闭FileInputStream但我该怎么做？ FileInputStream是方法的返回类型，如果我在这里关闭，那么从它调用的地方就没有用处。请让我知道 - 如果同样的方法返回FileInputStream，如何关闭FileInputStream？

下面是代码：

@Override 
public InputStream getInputStream() throws MissingObjectException { 

    try { 
     InputStream is; 
     if (smbFile != null) { 
      is = new BufferedInputStream(new SmbFileInputStream(smbFile), 60000); 
     } 
     else { 
      is = new BufferedInputStream(new FileInputStream(getFilePath())); 
     } 
     return is; 
    } 
    catch (Exception e) { 
      throw new MissingObjectException(); 
    } 
} 

Answer 1

没有必要关闭输入相同的功能。问题可能是您不应在try{}区块中声明InputStream is以及放入return声明。

Answer 2

说就是try块

InputStream is= null; 
try { 
    if (smbFile != null) { 
     is = new BufferedInputStream(new SmbFileInputStream(smbFile), 60000);    } else { 
     is = new BufferedInputStream(new FileInputStream(getFilePath())); 
    } 
    return is; 
} 
catch (Exception e) { 
     throw new MissingObjectException(); 
}finally{ 
    if(is !=null){ 
    is.close(); 
} 
}