java對zip進行壓縮和解壓
阿新 • • 發佈:2019-02-02
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
/**
* Zip壓縮解壓縮
* @author LuoZq
*/
public final class ZipUtils {
public static final String SUFFIX_NAME = "zip";
/**
* 壓縮檔案
* @param zipFile 壓縮檔名路徑
* @param fileList 待壓縮的檔案集合
* @param isDeleteRes 如果出現同名壓縮包, 是否刪除原本的壓縮包, 如果false,且出現同名則拋異常
* @return 壓縮後的壓縮包File
*/
public static File compress(String zipFile, List<File> fileList, boolean isDelete){
File f = isCheckFileNameByZip(zipFile);
return compress( f.getName(), f.getParent(), getFilePathArray(fileList), false, isDelete );
}
/**
* 壓縮檔案
* @param zipFile 壓縮檔名路徑
* @param fileList 待壓縮的檔案集合
* @return 壓縮後的壓縮包File
*/
public static File compress(String zipFile, List<File> fileList){
return compress( zipFile, fileList, true );
}
/**
* 校驗目標檔名稱是否是zip格式
* @param zipFile
* @return
*/
private static File isCheckFileNameByZip(String zipFile){
return new File(zipFile.substring(0, isCheckFileNameInZip(zipFile)));
}
/**
* 校驗目標檔名稱是否是zip格式
* @param zipFile
* @return
*/
private static int isCheckFileNameInZip(String zipFile){
int las = zipFile.lastIndexOf(".");
if(las == -1){
throw new RuntimeException( zipFile + " is not zip format! this format = ??? ");
}
String format = zipFile.substring(las + 1);
if(!SUFFIX_NAME.equalsIgnoreCase(format)){
throw new RuntimeException( zipFile + " is not zip format! this format = " + format);
}
return las;
}
private static String[] getFilePathArray (List<File> list){
String[] strs = new String[list.size()];
for(int index = 0; index < strs.length; index++){
strs[index] = list.get(index).getPath();
}
return strs;
}
/**
* 壓縮檔案
* @param zipName 壓縮檔名, 無需加字尾
* @param zipFilePath 壓縮路徑
* @param filePaths 待壓縮的檔案路徑
* @param isNewFolder 是否在壓縮包新建同名資料夾
* @param isDeleteRes 如果出現同名壓縮包, 是否刪除原本的壓縮包, 如果false,且出現同名則拋異常
* @return 壓縮後的壓縮包File
*/
private static File compress(String zipName,String zipFilePath, String[] filePaths, boolean isNewFolder, boolean isDeleteRes) {
File target = null;
File source = new File(zipFilePath);
if (source.exists()) {
String base = isNewFolder? zipName + File.separator: "";
zipName = zipName + "." + SUFFIX_NAME;// 壓縮檔名=原始檔名.zip
target = new File(source.getPath(), zipName);
if (target.exists()) {
if(!isDeleteRes){
throw new RuntimeException("Compression package name repetition !");
}
target.delete(); // 刪除舊的檔案
}
FileOutputStream fos = null;
ZipOutputStream zos = null;
try {
fos = new FileOutputStream(target);
zos = new ZipOutputStream(new BufferedOutputStream(fos));
// 新增對應的檔案Entry
for(String fip:filePaths){
addEntry(base, new File(fip), zos);
}
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
closeQuietly(zos, fos);
}
}
return target;
}
/**
* 解壓檔案
* filePath所代表檔案系統不能與targetStr一致
* @param filePath 壓縮檔案路徑
* @param targetStr 解壓至所在檔案目錄
*/
public static void decompression(String filePath, String targetStr) {
isCheckFileNameInZip(filePath);
File source = new File(filePath);
if (source.exists()) {
ZipInputStream zis = null;
BufferedOutputStream bos = null;
try {
zis = new ZipInputStream(new FileInputStream(source));
ZipEntry entry = null;
while ((entry = zis.getNextEntry()) != null && !entry.isDirectory()) {
File target = new File(targetStr, entry.getName());
if (!target.getParentFile().exists()) {
target.getParentFile().mkdirs();// 建立檔案父目錄
}
// 寫入檔案
bos = new BufferedOutputStream(new FileOutputStream(target));
int read = 0;
byte[] buffer = new byte[1024 * 10];
while ((read = zis.read(buffer, 0, buffer.length)) != -1) {
bos.write(buffer, 0, read);
}
bos.flush();
}
zis.closeEntry();
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
closeQuietly(zis, bos);
}
}
}
/**
* 掃描新增檔案Entry
* @param base 基路徑
* @param source 原始檔
* @param zos Zip檔案輸出流
* @throws IOException
*/
private static void addEntry(String base, File source, ZipOutputStream zos) throws IOException {
// 按目錄分級,形如:/aaa/bbb.txt
String entry = base.concat(source.getName());
if (source.isDirectory()) {
for (File file : source.listFiles()) {
// 遞迴列出目錄下的所有檔案,新增檔案Entry
addEntry(entry + File.separator, file, zos);
}
} else {
FileInputStream fis = null;
BufferedInputStream bis = null;
try {
byte[] buffer = new byte[1024 * 10];
fis = new FileInputStream(source);
bis = new BufferedInputStream(fis, buffer.length);
int read = 0;
zos.putNextEntry(new ZipEntry(entry));
while ((read = bis.read(buffer, 0, buffer.length)) != -1) {
zos.write(buffer, 0, read);
}
zos.closeEntry();
} finally {
closeQuietly(bis, fis);
}
}
}
private ZipUtils(){
}
/**
* 關閉一個或多個流物件
*
* @param closeables
* 可關閉的流物件列表
*/
public static void closeQuietly(Closeable... closeables) {
try {
if (closeables != null && closeables.length > 0) {
for (Closeable closeable : closeables) {
if (closeable != null) {
closeable.close();
}
}
}
} catch (IOException e) {
// do nothing
}
}
public static void main(String[] args) {
String res = "G://test";
List<File> list = Arrays.asList( new File(res).listFiles() );
compress("G://testOne.zip", list);
decompression("G://testOne.zip", "G://testOne1.zip");
}
}