Java 压缩成zip文件

综述

在《把多个文件打包压缩成tar.gz文件并解压的Java实现》中介绍了如何把文件压缩车gz文件，这里介绍如何把文件压缩成zip文件。支持如下方式的压缩：

压缩单个文件
压缩文件夹下的所有文件

源码

话不多说，直接上源代码：

     /**
     *  压缩指定文件夹中的所有文件，生成指定名称的zip压缩包
     *
     * @param sourcePath 需要压缩的文件名称列表(包含相对路径)
     * @param zipOutPath 压缩后的文件名称
     **/
    public static void batchZipFiles(String sourcePath, String zipOutPath) {
        ZipOutputStream zipOutputStream = null;
        WritableByteChannel writableByteChannel = null;
        MappedByteBuffer mappedByteBuffer = null;
        try {
            zipOutputStream = new ZipOutputStream(new FileOutputStream(zipOutPath));
            writableByteChannel = Channels.newChannel(zipOutputStream);
            File file = new File(sourcePath);
            for (File source : file.listFiles()) {
                long fileSize = source.length();
                //利用putNextEntry来把文件写入
                zipOutputStream.putNextEntry(new ZipEntry(source.getName()));
                long read = Integer.MAX_VALUE;
                int count = (int) Math.ceil((double) fileSize / read);
                long pre = 0;
                //由于一次映射的文件大小不能超过2GB，所以分次映射
                for (int i = 0; i < count; i++) {
                    if (fileSize - pre < Integer.MAX_VALUE) {
                        read = fileSize - pre;
                    }
                    mappedByteBuffer = new RandomAccessFile(source, "r").getChannel()
                            .map(FileChannel.MapMode.READ_ONLY, pre, read);
                    writableByteChannel.write(mappedByteBuffer);
                    pre += read;
                }
            }
            mappedByteBuffer.clear();
        } catch (Exception e) {
            log.error("Zip more file error， fileNames: " + sourcePath, e);
        } finally {
            try {
                if (null != zipOutputStream) {
                    zipOutputStream.close();
                }
                if (null != writableByteChannel) {
                    writableByteChannel.close();
                }
                if (null != mappedByteBuffer) {
                    mappedByteBuffer.clear();
                }
            } catch (Exception e) {
                log.error("Zip more file error, file names are:" + sourcePath, e);
            }
        }
    }