关于ZIP大文件压缩

实测:4.76 GB一个单文件压缩没有什么问题。

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream; import org.apache.commons.compress.archivers.ArchiveEntry;
import org.apache.commons.compress.archivers.zip.Zip64Mode;
import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
import org.apache.commons.compress.archivers.zip.ZipArchiveInputStream;
import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream; public class ZipHelper { public static void main(String[] args) {
File[] files=new File[1];
File tmpFile=new File("F:\\ios10.8.2\\macos.dmg");
files[0] = tmpFile;
File zipFile=new File("F:\\ios10.8.2\\test.zip");
ZipHelper.zipFiles(files, zipFile);
}
public static boolean zipFiles(File[] files, File zipFile) {
boolean flag = false;
if (files != null && files.length > 0) {
ZipArchiveOutputStream zaos = null;
try {
zaos = new ZipArchiveOutputStream(zipFile);
// Use Zip64 extensions for all entries where they are required
zaos.setUseZip64(Zip64Mode.AsNeeded); // 将每个文件用ZipArchiveEntry封装
// 再用ZipArchiveOutputStream写到压缩文件中
for (File file : files) {
if (file != null) {
ZipArchiveEntry zipArchiveEntry = new ZipArchiveEntry(file, file.getName());
zaos.putArchiveEntry(zipArchiveEntry);
InputStream is = null;
try {
is = new FileInputStream(file);
byte[] buffer = new byte[1024 * 5];
int len = -1;
while ((len = is.read(buffer)) != -1) {
// 把缓冲区的字节写入到ZipArchiveEntry
zaos.write(buffer, 0, len);
}
zaos.closeArchiveEntry();
} catch (Exception e) {
flag = false;
} finally {
if (is != null)
is.close();
}
}
}
zaos.finish();
flag=true;
} catch (Exception e) {
flag = false;
} finally {
try {
if (zaos != null) {
zaos.close();
}
} catch (IOException e) {
flag = false;
}
}
} return flag;
} /**
* 解压缩ZIP文件,将ZIP文件里的内容解压到saveFileDir目录下
* @param zipFilePath 待解压缩的ZIP文件名
* @param saveFileDir 目标目录
*/
public static boolean upzipFile(String zipFilePath, String saveFileDir) {
boolean flag = false;
File file = new File(zipFilePath);
if (file.exists()) {
InputStream is = null;
ZipArchiveInputStream zais = null;
try {
is = new FileInputStream(file);
zais = new ZipArchiveInputStream(is);
ArchiveEntry archiveEntry = null;
// 把zip包中的每个文件读取出来
// 然后把文件写到指定的文件夹
while ((archiveEntry = zais.getNextEntry()) != null) {
// 获取文件名
String entryFileName = archiveEntry.getName();
// 构造解压出来的文件存放路径
String entryFilePath = saveFileDir + entryFileName;
byte[] content = new byte[(int) archiveEntry.getSize()];
zais.read(content);
OutputStream os = null;
try {
// 把解压出来的文件写到指定路径
File entryFile = new File(entryFilePath);
os = new FileOutputStream(entryFile);
os.write(content);
} catch (IOException e) {
flag = false;
} finally {
if (os != null) {
os.flush();
os.close();
}
}
}
flag=true;
} catch (Exception e) {
flag = false;
} finally {
try {
if (zais != null) {
zais.close();
}
if (is != null) {
is.close();
}
} catch (IOException e) {
flag = false;
}
}
}
return flag;
} }

下载commons-compress-1.9.zip

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