cnblogs/dcrenl/springboot 中 java.util.zip 文件的压缩.html

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<pre><span style="color: #0000ff;">package</span><span style="color: #000000;"> com.geotmt.billingcenter.common.utils;
 
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.datanucleus.util.StringUtils;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.slf4j.Logger;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.slf4j.LoggerFactory;
 
</span><span style="color: #0000ff;">import</span> java.io.*<span style="color: #000000;">;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> java.util.zip.CRC32;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> java.util.zip.CheckedOutputStream;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> java.util.zip.ZipEntry;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> java.util.zip.ZipOutputStream;
 
</span><span style="color: #008000;">/**</span><span style="color: #008000;">
 * @Description 压缩与解压工具
 * @Author      yanghanwei
 * @Date        18:42 2019-11-20
 * @Version     v1
 *</span><span style="color: #008000;">*/</span>
<span style="color: #0000ff;">public</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> ZipUtils {
 
    </span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">final</span> Logger logger = LoggerFactory.getLogger(ZipUtils.<span style="color: #0000ff;">class</span><span style="color: #000000;">);
 
     </span><span style="color: #008000;">/**</span><span style="color: #008000;">
     * 压缩 zip 
     * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> filePath  文件夹 全路径
     * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> fileName  文件夹名称
     * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> outPath   压缩文件保存路径
     </span><span style="color: #008000;">*/</span>
    <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> zipFile(String filePath, String fileName, String outPath) {
        logger.info(</span>"filePath:{}, fileName:{}, outPath:{}"<span style="color: #000000;">, filePath, fileName, outPath);
        </span><span style="color: #0000ff;">try</span><span style="color: #000000;"> {
            </span><span style="color: #008000;">//</span><span style="color: #008000;">创建Test.zip文件</span>
            OutputStream is = <span style="color: #0000ff;">new</span><span style="color: #000000;"> FileOutputStream(outPath);
            </span><span style="color: #008000;">//</span><span style="color: #008000;">检查输出流,采用CRC32算法，保证文件的一致性</span>
            CheckedOutputStream cos = <span style="color: #0000ff;">new</span> CheckedOutputStream(is, <span style="color: #0000ff;">new</span><span style="color: #000000;"> CRC32());
            </span><span style="color: #008000;">//</span><span style="color: #008000;">创建zip文件的输出流</span>
            ZipOutputStream zos = <span style="color: #0000ff;">new</span><span style="color: #000000;"> ZipOutputStream(cos);
            </span><span style="color: #008000;">//</span><span style="color: #008000;">需要压缩的文件或文件夹对象</span>
            File file = <span style="color: #0000ff;">new</span><span style="color: #000000;"> File(filePath);
            </span><span style="color: #008000;">//</span><span style="color: #008000;">压缩文件的具体实现函数</span>
<span style="color: #000000;">            zipFilePost(zos,file,filePath,fileName,outPath);
            zos.close();
            cos.close();
            is.close();
            System.out.println(</span>"压缩完成"<span style="color: #000000;">);
        } </span><span style="color: #0000ff;">catch</span><span style="color: #000000;"> (Exception e) {
            logger.error(</span>"压缩失败zipFile，Exception:" +<span style="color: #000000;"> e);
        }
    }
 
    </span><span style="color: #008000;">/**</span><span style="color: #008000;">
     * 压缩文件
     * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> zos       zip文件的输出流
     * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> file      需要压缩的文件或文件夹对象
     * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> filePath  压缩的文件路径
     * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> fileName  需要压缩的文件夹名
     * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> outPath   缩完成后保存为Test.zip文件
     </span><span style="color: #008000;">*/</span>
    <span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> zipFilePost(ZipOutputStream zos, File file, String filePath, String fileName, String outPath){
 
        </span><span style="color: #0000ff;">try</span><span style="color: #000000;">{
            String path </span>=<span style="color: #000000;"> file.getPath();
            String zosName </span>= ""<span style="color: #000000;">;
            </span><span style="color: #0000ff;">if</span>(!<span style="color: #000000;">StringUtils.isEmpty(path)){
                zosName </span>=<span style="color: #000000;"> path.substring(path.indexOf(fileName));
            }
            File[] files </span>=<span style="color: #000000;"> file.listFiles();
            </span><span style="color: #0000ff;">if</span>(file.isDirectory() &amp;&amp; files != <span style="color: #0000ff;">null</span> &amp;&amp; files.length &gt; 0<span style="color: #000000;">) {
                </span><span style="color: #008000;">//</span><span style="color: #008000;"> 创建压缩文件的目录结构</span>
                zos.putNextEntry(<span style="color: #0000ff;">new</span> ZipEntry(zosName +<span style="color: #000000;"> File.separator));
                </span><span style="color: #0000ff;">for</span><span style="color: #000000;">(File f : files) {
                    zipFilePost(zos, f, filePath, fileName, outPath);
                }
            } </span><span style="color: #0000ff;">else</span><span style="color: #000000;"> {
                logger.info(</span>"正在压缩文件:{}"<span style="color: #000000;">,file.getName());
                </span><span style="color: #008000;">//</span><span style="color: #008000;"> 创建压缩文件</span>
                zos.putNextEntry(<span style="color: #0000ff;">new</span><span style="color: #000000;"> ZipEntry(zosName));
                </span><span style="color: #008000;">//</span><span style="color: #008000;"> 用字节方式读取源文件</span>
                InputStream is = <span style="color: #0000ff;">new</span><span style="color: #000000;"> FileInputStream(file.getPath());
                </span><span style="color: #008000;">//</span><span style="color: #008000;"> 创建一个缓存区</span>
                BufferedInputStream bis = <span style="color: #0000ff;">new</span><span style="color: #000000;"> BufferedInputStream(is);
                </span><span style="color: #008000;">//</span><span style="color: #008000;"> 字节数组,每次读取1024个字节</span>
                <span style="color: #0000ff;">byte</span> [] b = <span style="color: #0000ff;">new</span> <span style="color: #0000ff;">byte</span>[1024<span style="color: #000000;">];
                </span><span style="color: #008000;">//</span><span style="color: #008000;"> 循环读取，边读边写</span>
                <span style="color: #0000ff;">while</span>(bis.read(b)!=-1<span style="color: #000000;">) {
                    </span><span style="color: #008000;">//</span><span style="color: #008000;"> 写入压缩文件</span>
<span style="color: #000000;">                    zos.write(b);
                }
                </span><span style="color: #008000;">//</span><span style="color: #008000;">关闭流</span>
<span style="color: #000000;">                bis.close();
                is.close();
            }
        } </span><span style="color: #0000ff;">catch</span><span style="color: #000000;"> (Exception e) {
            logger.error(</span>"压缩文件失败zipFilePost，Exception：" +<span style="color: #000000;"> e);
        }
    }
 
 
    </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">void</span> main(String[] args) <span style="color: #0000ff;">throws</span><span style="color: #000000;"> Exception{
        String filePath </span>= "/var/folders/88/jh37h0fj59l1f302jdryz4780000gn/T/201908月小微平台消耗-1574300435525/"<span style="color: #000000;">;
        </span><span style="color: #008000;">//</span><span style="color: #008000;"> 需要压缩的文件夹名</span>
        String fileName = "201908月小微平台消耗-1574300435525"<span style="color: #000000;">;
        </span><span style="color: #008000;">//</span><span style="color: #008000;"> 压缩完成后保存为Test.zip文件，名字随意</span>
        String outPath = "/var/folders/88/jh37h0fj59l1f302jdryz4780000gn/T/Test3.zip"<span style="color: #000000;">;
        zipFile(filePath, fileName, outPath);
    }
}</span></pre>
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<p>&nbsp;</p>
<p>转自：https://blog.csdn.net/qq_29323645/article/details/103202158</p>