前言
利用Java原生类和apache的commons实现zip,gzip,7z,zlib的压缩打包
maven依赖
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-compress</artifactId>
<version>1.12</version>
</dependency>
zip格式
public static void zip(String input, String output, String name) throws Exception {
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(output));
String[] paths = input.split("\\|");
File[] files = new File[paths.length];
byte[] buffer = new byte[1024];
for (int i = 0; i < paths.length; i++) {
files[i] = new File(paths[i]);
}
for (int i = 0; i < files.length; i++) {
FileInputStream fis = new FileInputStream(files[i]);
if (files.length == 1 && name != null) {
out.putNextEntry(new ZipEntry(name));
} else {
out.putNextEntry(new ZipEntry(files[i].getName()));
}
int len;
// 读入需要下载的文件的内容,打包到zip文件
while ((len = fis.read(buffer)) > 0) {
out.write(buffer, 0, len);
}
out.closeEntry();
fis.close();
}
out.close();
}
gzip打包
public static void gzip(String input, String output, String name) throws Exception {
String compress_name = null;
if (name != null) {
compress_name = name;
} else {
compress_name = new File(input).getName();
}
byte[] buffer = new byte[1024];
try {
GzipParameters gp = new GzipParameters(); //设置压缩文件里的文件名
gp.setFilename(compress_name);
GzipCompressorOutputStream gcos = new GzipCompressorOutputStream(new FileOutputStream(output), gp);
FileInputStream fis = new FileInputStream(input);
int length;
while ((length = fis.read(buffer)) > 0) {
gcos.write(buffer, 0, length);
}
fis.close();
gcos.finish();
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
7z打包
public static void z7z(String input, String output, String name) throws Exception {
try {
SevenZOutputFile sevenZOutput = new SevenZOutputFile(new File(output));
SevenZArchiveEntry entry = null;
String[] paths = input.split("\\|");
File[] files = new File[paths.length];
for (int i = 0; i < paths.length; i++) {
files[i] = new File(paths[i].trim());
}
for (int i = 0; i < files.length; i++) {
BufferedInputStream instream = null;
instream = new BufferedInputStream(new FileInputStream(paths[i]));
if (name != null) {
entry = sevenZOutput.createArchiveEntry(new File(paths[i]), name);
} else {
entry = sevenZOutput.createArchiveEntry(new File(paths[i]), new File(paths[i]).getName());
}
sevenZOutput.putArchiveEntry(entry);
byte[] buffer = new byte[1024];
int len;
while ((len = instream.read(buffer)) > 0) {
sevenZOutput.write(buffer, 0, len);
}
instream.close();
sevenZOutput.closeArchiveEntry();
}
sevenZOutput.close();
} catch (IOException ioe) {
System.out.println(ioe.toString() + " " + input);
}
}
zlib打包
public static void zlib(String input, String output) throws Exception {
// DeflaterOutputStream dos = new DeflaterOutputStream(new FileOutputStream(output));
DeflateParameters dp = new DeflateParameters();
dp.setWithZlibHeader(true);
DeflateCompressorOutputStream dcos = new DeflateCompressorOutputStream(new FileOutputStream(output),dp);
FileInputStream fis = new FileInputStream(input);
int length = (int) new File(input).length();
byte data[] = new byte[length];
// int length;
while ((length = fis.read(data)) > 0) {
dcos.write(data, 0, length);
}
fis.close();
dcos.finish();
dcos.close();
}
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