解决Java压缩zip异常java.util.zip.ZipException:duplicate entry:问题

public static void doCompress(File file, ZipOutputStream out) throws IOException {
    if( file.exists() ){
        byte[] buffer = new byte[1024];
        FileInputStream fis = new FileInputStream(file);
        out.putNextEntry(new ZipEntry(file.getName()));
        int len = 0 ;
        // 读取文件的内容,打包到zip文件
        while ((len = fis.read(buffer)) > 0) {
            out.write(buffer, 0, len);
        }
        out.flush();
        out.closeEntry();
        fis.close();
    }
}

out.putNextEntry(new ZipEntry(file.getName()));