通过ByteArrayOutputStream将inputStream转变为outputStream

通过ByteArrayOutputStream将inputStream转变为outputStream
 
 
1.首先，先编写一个获取文件输入流的方法 ops()。
2. 之后在调用此方法获得输入流，并通过 castToBAOStream(Object obj,int bufferSize)进行转化。
3.最后，写出 转化成功的 输出流。
 
 
 
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Java代码 
public class Stream {   
 
   
 
    public static final int StreamFlushBufferSzie=100;//buffer size= 1K   
 
       
 
      public static ByteArrayOutputStream castToBAOStream(Object obj,int bufferSize){   
 
               
 
//          Log logger = LogFactory.getLog(CommonUtil.class);   
 
               
 
            ByteArrayOutputStream baos=new ByteArrayOutputStream();   
 
               
 
            if(obj.getClass().isInstance(baos)){   
 
                return (ByteArrayOutputStream)obj;   
 
            }else{   
 
                InputStream fis;   
 
                try{