Android实现解压压缩文件

Posted 2022-10-30 mufeng_慕枫

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

/**
 * zip文件解压工具类
 * Created by mufeng on 2017/3/13.
 */
public class ZipFileHelper 
    private static final int BUFFER_SIZE = 1024 * 1024;//1M Byte

    /**
     * 解压缩一个文件
     *
     * @param zipFile    压缩文件
     * @param folderPath 解压缩的目标目录
     * @return
     * @throws IOException 当解压缩过程出错时抛出
     */
    public static ArrayList<File> upZipFile(File zipFile, String folderPath) throws IOException 
        ArrayList<File> fileList = new ArrayList<File>();
        File desDir = new File(folderPath);
        if (!desDir.exists()) 
            desDir.mkdirs();
        
        ZipFile zf = new ZipFile(zipFile);
        for (Enumeration<?> entries = zf.entries(); entries.hasMoreElements(); ) 
            ZipEntry entry = (ZipEntry) entries.nextElement();
            if (entry.isDirectory()) 
                continue;
            
            InputStream is = zf.getInputStream(entry);
            String str = folderPath + File.separator + entry.getName();
            str = new String(str.getBytes("8859_1"), "UTF-8");
            File desFile = new File(str);
            if (!desFile.exists()) 
                File fileParentDir = desFile.getParentFile();
                if (!fileParentDir.exists()) 
                    fileParentDir.mkdirs();
                
                desFile.createNewFile();
            
            OutputStream os = new FileOutputStream(desFile);
            byte buffer[] = new byte[BUFFER_SIZE];
            int length;
            while ((length = is.read(buffer)) > 0) 
                os.write(buffer, 0, length);
            
            os.flush();
            os.close();
            is.close();
            fileList.add(desFile);
        
        return fileList;
    

    /**
     * 解压文件名包含传入文字的文件
     *
     * @param zipFile      压缩文件
     * @param folderPath   目标文件夹
     * @param nameContains 传入的文件匹配名
     * @return
     * @throws IOException 当解压缩过程出错时抛出
     */
    public static ArrayList<File> upZipSelectFile(File zipFile, String folderPath, String nameContains) throws IOException 
        ArrayList<File> fileList = new ArrayList<File>();
        File desDir = new File(folderPath);
        if (!desDir.exists()) 
            desDir.mkdirs();
        
        ZipFile zf = new ZipFile(zipFile);
        for (Enumeration<?> entries = zf.entries(); entries.hasMoreElements(); ) 
            ZipEntry entry = (ZipEntry) entries.nextElement();
            if (entry.isDirectory()) 
                continue;
            
            if (entry.getName().contains(nameContains)) 
                InputStream is = zf.getInputStream(entry);
                String str = folderPath + File.separator + entry.getName();
                str = new String(str.getBytes("8859_1"), "UTF-8");
                File desFile = new File(str);
                if (!desFile.exists()) 
                    File fileParentDir = desFile.getParentFile();
                    if (!fileParentDir.exists()) 
                        fileParentDir.mkdirs();
                    
                    desFile.createNewFile();
                
                OutputStream os = new FileOutputStream(desFile);
                byte buffer[] = new byte[BUFFER_SIZE];
                int length;
                while ((length = is.read(buffer)) > 0) 
                    os.write(buffer, 0, length);
                
                is.close();
                os.flush();
                os.close();
                fileList.add(desFile);
            
        
        return fileList;