import org.subethamail.smtp.io.DeferredFileOutputStream; //导入依赖的package包/类
private DeferredFileOutputStream copyDataToDeferredFileOutputStream(
        InputStream src) throws IOException {
    byte[] buffer = new byte[8192];
    DeferredFileOutputStream deferredFileOutputStream =
            new DeferredFileOutputStream(32768);
    int cRead;
    while ((cRead = src.read(buffer)) > 0) {
        deferredFileOutputStream.write(buffer, 0, cRead);
    }
    return deferredFileOutputStream;
}
 

import org.subethamail.smtp.io.DeferredFileOutputStream; //导入依赖的package包/类
/**
 * Constructs a new DeferredFileMailData so that it contains the message
 * content residing in the specified stream.
 * 
 * @param deferredFileOutputStream
 *            The stream containing the message content.
 */
public DeferredFileMailData(
        DeferredFileOutputStream deferredFileOutputStream) {
    this.deferredFileOutputStream = deferredFileOutputStream;
}