com.centit.support.algorithm.ZipCompressor Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of centit-utils Show documentation
Show all versions of centit-utils Show documentation
java 常用工具类,作为 apache-commons的补充
package com.centit.support.algorithm;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;
@SuppressWarnings("unused")
public abstract class ZipCompressor {
static final int BUFFER = 8192;
//private File zipFile;
private ZipCompressor() {
//zipFile = new File(pathName);
}
/**
* 将OutputStream 转换为 ZipOutputStream 并作为 compressFile 的输入参数
* 这个可以用于 打包下载
* @param os os
* @return ZipOutputStream
*/
public static ZipOutputStream convertToZipOutputStream(OutputStream os){
return new ZipOutputStream(
new CheckedOutputStream(os,
new CRC32()));
}
public static void compress(String zipFilePathName, String fileName, String srcPathName) {
File file = new File(srcPathName);
if (!file.exists())
throw new RuntimeException(srcPathName + "不存在！");
try {
File zipFile = new File(zipFilePathName);
FileOutputStream fileOutputStream = new FileOutputStream(zipFile);
/*CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,
new CRC32());*/
ZipOutputStream out = convertToZipOutputStream(fileOutputStream);
// new ZipOutputStream(cos);
String basedir = "";
compress(file, fileName, out, basedir);
out.close();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static void compress(String zipFilePathName, String srcPathName) {
File file = new File(srcPathName);
if (!file.exists())
throw new RuntimeException(srcPathName + "不存在！");
try {
File zipFile = new File(zipFilePathName);
FileOutputStream fileOutputStream = new FileOutputStream(zipFile);
/*CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,
new CRC32());*/
ZipOutputStream out = convertToZipOutputStream(fileOutputStream);
// new ZipOutputStream(cos);
String basedir = "";
compress(file, out, basedir);
out.close();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static void compressFileInDirectory(String zipFilePathName, String srcPathName) {
File file = new File(srcPathName);
if (!file.exists())
throw new RuntimeException(srcPathName + "不存在！");
try {
File zipFile = new File(zipFilePathName);
FileOutputStream fileOutputStream = new FileOutputStream(zipFile);
/*CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,
new CRC32());*/
ZipOutputStream out = convertToZipOutputStream(fileOutputStream);
// new ZipOutputStream(cos);
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
/* 递归 */
compress(files[i], out, "");
}
//compress(file, out, basedir);
out.close();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static void compress(File file,String fileName, ZipOutputStream out, String basedir) {
/* 判断是目录还是文件 */
if (file.isDirectory()) {
//System.out.println("压缩：" + basedir + file.getName());
compressDirectory(file, out, basedir);
} else {
//System.out.println("压缩：" + basedir + file.getName());
compressFile(file, fileName, out, basedir);
}
}
public static void compress(File file, ZipOutputStream out, String basedir) {
/* 判断是目录还是文件 */
if (file.isDirectory()) {
//System.out.println("压缩：" + basedir + file.getName());
compressDirectory(file, out, basedir);
} else {
//System.out.println("压缩：" + basedir + file.getName());
compressFile(file, file.getName(), out, basedir);
}
}
/* 压缩一个目录 */
public static void compressDirectory(File dir, ZipOutputStream out, String basedir) {
if (!dir.exists())
return;
File[] files = dir.listFiles();
for (int i = 0; i < files.length; i++) {
/* 递归 */
compress(files[i], out, basedir + dir.getName() + "/");
}
}
/* 压缩一个文件 fileName = file.getName() */
public static void compressFile(File file, String fileName, ZipOutputStream out, String basedir) {
if (!file.exists()) {
return;
}
try {
BufferedInputStream bis = new BufferedInputStream(
new FileInputStream(file));
ZipEntry entry = new ZipEntry(basedir +fileName);
out.putNextEntry(entry);
int count;
byte data[] = new byte[BUFFER];
while ((count = bis.read(data, 0, BUFFER)) != -1) {
out.write(data, 0, count);
}
bis.close();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static void compressFile(File file, ZipOutputStream out, String basedir) {
compressFile( file, file.getName(), out, basedir);
}
/**
* 解压到指定目录
*
* @param zipPath zipPath
* @param dirPath dirPath
* @author isea533
*/
public static void release(String zipPath, String dirPath) {
release(new File(zipPath), dirPath);
}
/**
* 解压文件到指定目录
*
* @param zipFile zipFile
* @param dirPath dirPath
* @author isea533
*/
public static void release(File zipFile, String dirPath) {
String descDir = dirPath;
if(!descDir.endsWith("/"))
descDir = dirPath+"/";
File pathFile = new File(descDir);
if (!pathFile.exists()) {
pathFile.mkdirs();
}
try{
ZipFile zip = new ZipFile(zipFile);
// zip.entries()
for (Enumeration entries = zip.entries(); entries.hasMoreElements();) {
ZipEntry entry = (ZipEntry) entries.nextElement();
String zipEntryName = entry.getName();
InputStream in = zip.getInputStream(entry);
String outPath = (descDir + zipEntryName).replaceAll("\\*", "/");
// 判断路径是否存在,不存在则创建文件路径
File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));
if (!file.exists()) {
file.mkdirs();
}
// 判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压
if (new File(outPath).isDirectory()) {
continue;
}
// 输出文件路径信息
//System.out.println(outPath);
OutputStream out = new FileOutputStream(outPath);
byte[] buf1 = new byte[1024];
int len;
while ((len = in.read(buf1)) > 0) {
out.write(buf1, 0, len);
}
in.close();
out.close();
}
zip.close();
}catch (Exception e) {
throw new RuntimeException(e);
}
// System.out.println("******************解压完毕********************");
}
}