小李教你最简单高效的实现文件压缩功能

这里我们定义一个压缩包元素实体，压缩包名称只是为了业务中传输方便  参数只有一个file 就是你要压缩的文件。
public class ZipAllEntity {
    File file;
    ZipEntry entity;
    String zipName;

    public File getFile() {
        return file;
    }

    public void setFile(File file) {
        this.file = file;
    }

    public ZipEntry getEntity() {
        return entity;
    }

    public void setEntity(ZipEntry entity) {
        this.entity = entity;
    }

    public String getZipName() {
        return zipName;
    }

    public void setZipName(String zipName) {
        this.zipName = zipName;
    }
    public void setEntity(File file) {
        this.entity = new  ZipEntry(file.getName());
    }

    @Override
    public String toString() {
        final StringBuffer sb = new StringBuffer("ZipEntity{");
        sb.append("file=").append(file);
        sb.append(", entity=").append(entity);
        sb.append(", zipName='").append(zipName).append('\'');
        sb.append('}');
        return sb.toString();
    }

}

 

/**
 * 获取Zip实体对象
 * @param taskId
 * @param zipName
 * @return
 */
@Override
public List getZip(String taskId, String zipName) {
   TbsFileDTO tbsFileDTO = new TbsFileDTO();
   tbsFileDTO.setTaskId(taskId);
   //这里我们去数据库查询要被压缩的文件
   List list=------------
   ArrayList ziplist=new ArrayList();
   for (TbsFileDTO tbs:list
       ) {
      File file=new  File(FtpClientUtil.getPath() + "/"+ tbs.getFileUrl()) ;
      ZipAllEntity entity=new ZipAllEntity();
      entity.setZipName(StringUtil.isEmpty(zipName)?tbs.getStrExt01():zipName);
      entity.setFile(file);
      entity.setEntity(file);
      ziplist.add(entity);
   }
   return ziplist;
}

/**
 * 压缩包写入
 * @param list 封装好的集合
 * @param out 要写入哪个流 写本地文件就穿本地流 传web端就写
 */
public  static void  write(List list , OutputStream out){
    FileInputStream fis = null;
    BufferedInputStream bis = null;
    java.util.zip.ZipOutputStream zos = new java.util.zip.ZipOutputStream(new BufferedOutputStream(out));
    try {
        byte[] bufs = new byte[1024 * 10];
        for (ZipAllEntity all:list
                ) {
            zos.putNextEntry(all.getEntity());
            fis = new FileInputStream(all.getFile());
            bis = new BufferedInputStream(fis, 1024 * 10);
            int read = 0;
            while ((read = bis.read(bufs, 0, 1024 * 10)) != -1) {
                zos.write(bufs, 0, read);
            }
        }
        zos.flush();
    }catch (Exception e){
        logger.error(e.getMessage());
    }finally {
        try {
            if (null != bis) {
                bis.close();
            }
            if (null != zos) {
                zos.close();
            }
            if (null != fis) {
                fis.close();
            }
            if (null != out) {
                out.close();
            }
        }catch (Exception e){

        }
    }