压缩文件

 package com.iss.cpf.windmanger.userprivilegeexport.bizlogic;

 import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Enumeration;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipFile; import org.apache.commons.lang.StringUtils;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream; public class ZipBiz { /**
* 递归压缩文件夹
* @param srcRootDir 压缩文件夹根目录的子路径
* @param file 当前递归压缩的文件或目录对象
* @param zos 压缩文件存储对象
* @throws Exception
*/
private static void zip(String srcRootDir, File file, ZipOutputStream zos) throws Exception
{
if (file == null)
{
return;
} //如果是文件,则直接压缩该文件
if (file.isFile())
{
int count, bufferLen = 1024;
byte data[] = new byte[bufferLen]; //获取文件相对于压缩文件夹根目录的子路径
String subPath = file.getAbsolutePath();
int index = subPath.indexOf(srcRootDir);
if (index != -1)
{
subPath = subPath.substring(srcRootDir.length() + File.separator.length());
}
ZipEntry entry = new ZipEntry(subPath);
entry.setUnixMode(644);//解决Linux乱码
zos.putNextEntry(entry);
zos.setEncoding("GBK");
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
while ((count = bis.read(data, 0, bufferLen)) != -1)
{
zos.write(data, 0, count);
}
bis.close();
zos.closeEntry();
}
//如果是目录,则压缩整个目录
else
{
//压缩目录中的文件或子目录
File[] childFileList = file.listFiles();
for (int n=0; n<childFileList.length; n++)
{
childFileList[n].getAbsolutePath().indexOf(file.getAbsolutePath());
zip(srcRootDir, childFileList[n], zos);
}
}
} /**
* 对文件或文件目录进行压缩
* @param srcPath 要压缩的源文件路径。如果压缩一个文件,则为该文件的全路径;如果压缩一个目录,则为该目录的顶层目录路径
* @param zipPath 压缩文件保存的路径。注意:zipPath不能是srcPath路径下的子文件夹
* @param zipFileName 压缩文件名
* @throws Exception
*/
public static void zip(String srcPath, String zipPath, String zipFileName) throws Exception
{
if (StringUtils.isEmpty(srcPath) || StringUtils.isEmpty(zipPath) || StringUtils.isEmpty(zipFileName))
{
throw new Exception("路径不正确");
}
CheckedOutputStream cos = null;
ZipOutputStream zos = null;
try
{
File srcFile = new File(srcPath); //判断压缩文件保存的路径是否为源文件路径的子文件夹,如果是,则抛出异常(防止无限递归压缩的发生)
//若果是本地 路径是从配置文件读取的 / 会导致报错
if (srcFile.isDirectory() && zipPath.indexOf(srcPath)>0)
{
throw new Exception("zipPath must not be the child directory of srcPath= "+srcFile);
} //判断压缩文件保存的路径是否存在,如果不存在,则创建目录
File zipDir = new File(zipPath);
if (!zipDir.exists() || !zipDir.isDirectory())
{
zipDir.mkdirs();
} //创建压缩文件保存的文件对象
String zipFilePath = zipPath + File.separator + zipFileName;
File zipFile = new File(zipFilePath);
if (zipFile.exists())
{
//检测文件是否允许删除,如果不允许删除,将会抛出SecurityException
SecurityManager securityManager = new SecurityManager();
securityManager.checkDelete(zipFilePath);
//删除已存在的目标文件
zipFile.delete();
} cos = new CheckedOutputStream(new FileOutputStream(zipFile), new CRC32());
zos = new ZipOutputStream(cos); //如果只是压缩一个文件,则需要截取该文件的父目录
String srcRootDir = srcPath;
if (srcFile.isFile())
{
int index = srcPath.lastIndexOf(File.separator);
if (index != -1)
{
srcRootDir = srcPath.substring(0, index);
}
}
//调用递归压缩方法进行目录或文件压缩
zip(srcRootDir, srcFile, zos);
zos.flush();
}
catch (Exception e)
{
throw e;
}
finally
{
try
{
if (zos != null)
{
zos.close();
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
} /**
* 解压缩zip包
* @param zipFilePath zip文件的全路径
* @param unzipFilePath 解压后的文件保存的路径
* @param includeZipFileName 解压后的文件保存的路径是否包含压缩文件的文件名。true-包含;false-不包含
*/
@SuppressWarnings("unchecked")
public static void unzip(String zipFilePath, String unzipFilePath, boolean includeZipFileName) throws Exception
{
if (StringUtils.isEmpty(zipFilePath) || StringUtils.isEmpty(unzipFilePath))
{
throw new Exception("路径为空");
}
File zipFile = new File(zipFilePath);
//如果解压后的文件保存路径包含压缩文件的文件名,则追加该文件名到解压路径
if (includeZipFileName)
{
String fileName = zipFile.getName();
if (StringUtils.isNotEmpty(fileName))
{
fileName = fileName.substring(0, fileName.lastIndexOf("."));
}
unzipFilePath = unzipFilePath + File.separator + fileName;
}
//创建解压缩文件保存的路径
File unzipFileDir = new File(unzipFilePath);
if (!unzipFileDir.exists() || !unzipFileDir.isDirectory())
{
unzipFileDir.mkdirs();
} //开始解压
ZipEntry entry = null;
String entryFilePath = null, entryDirPath = null;
File entryFile = null, entryDir = null;
int index = 0, count = 0, bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
ZipFile zip = new ZipFile(zipFile);
Enumeration<ZipEntry> entries = (Enumeration<ZipEntry>)zip.entries();
//循环对压缩包里的每一个文件进行解压
while(entries.hasMoreElements())
{
entry = entries.nextElement();
//构建压缩包中一个文件解压后保存的文件全路径
entryFilePath = unzipFilePath + File.separator + entry.getName();
//构建解压后保存的文件夹路径
index = entryFilePath.lastIndexOf(File.separator);
if (index != -1)
{
entryDirPath = entryFilePath.substring(0, index);
}
else
{
entryDirPath = "";
}
entryDir = new File(entryDirPath);
//如果文件夹路径不存在,则创建文件夹
if (!entryDir.exists() || !entryDir.isDirectory())
{
entryDir.mkdirs();
} //创建解压文件
entryFile = new File(entryFilePath);
if (entryFile.exists())
{
//检测文件是否允许删除,如果不允许删除,将会抛出SecurityException
SecurityManager securityManager = new SecurityManager();
securityManager.checkDelete(entryFilePath);
//删除已存在的目标文件
entryFile.delete();
} //写入文件
bos = new BufferedOutputStream(new FileOutputStream(entryFile));
bis = new BufferedInputStream(zip.getInputStream(entry));
while ((count = bis.read(buffer, 0, bufferSize)) != -1)
{
bos.write(buffer, 0, count);
}
bos.flush();
bos.close();
}
}
/**
* 复制文件
* @param fromFile
* @param toFile
* <br/>
* 2018年4月9日 下午3:31:50
* @throws IOException
*/
public void copyFile(File fromFile,File toFile) throws IOException{
//如果目标文件不存在,则创建
File parentFile = toFile.getParentFile();
if(!parentFile.exists()){
parentFile.mkdirs();
}
if(!toFile.exists()){
toFile.createNewFile();
}
//复制文件
FileInputStream ins = new FileInputStream(fromFile);
FileOutputStream out = new FileOutputStream(toFile);
byte[] b = new byte[1024];
int n=0;
while((n=ins.read(b))!=-1){
out.write(b, 0, n);
} ins.close();
out.close();
} public static void main(String[] args)
{
String zipPath = "/appshare/cpfupload/windmanger/userManageExport/17/zip";
String dir = "/appshare/cpfupload/windmanger/userManageExport/17";
// String zipFileName = "test.zip"; long i=zipPath.indexOf(dir); System.out.print(i); String zipFilePath = "D:\\ziptest\\zipPath\\test.zip";
String unzipFilePath = "D:\\ziptest\\zipPath";
try
{
// unzip(zipFilePath, unzipFilePath, true);
}
catch (Exception e)
{
e.printStackTrace();
} } }
05-06 14:45