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Unable to zip multiple files using Java
inputStream = AWSFileUtil.getInputStream(
                    AWSConnectionUtil.getS3Object(null),
                    "cdn.generalsentiment.com", filePath);

ByteArrayInputStream byteArrayInputStream = new
ByteArrayInputStream(inputStream.toString().getBytes());
            while (byteArrayInputStream.read(inputStream.toString().getBytes()) > 0) {
                zipOutputStream.write(inputStream.toString().getBytes());
            }

zipOutputStream.close();
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        fileInputStream = new FileInputStream(file);
        while (fileInputStream.read(buffer) > 0) {
            byteArrayOutputStream.write(buffer);
        }
        byteArrayOutputStream.close();
        inputStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
        reportName = "GS_MediaValue_Reports.zip";
        fileType = "zip";
    }

    return fileType;

ZipEntry entry = new ZipEntry( fileName ); // You have to give each entry a different filename
zipOutputStream.putNextEntry( entry );
byte buffer[] = new byte[ 1024 ]; // 1024 is the buffer size here, but it could be anything really
int count;
while( (count = inputStream.read( buffer, 0, 1024 ) ) != -1 ) {
    zipOutputStream.write( buffer, 0, count );
}