android解压rar文件

package com.jxd.jxdtest.commonutil;

import android.util.Log;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import de.innosystec.unrar.Archive;
import de.innosystec.unrar.exception.RarException;
import de.innosystec.unrar.rarfile.FileHeader;

public class RarUtil {
    /**
     * 暂时不支持带密码的rar文件
     */
    private static final String TAG = "RARUtil";

    public static void unrar(String srcPath,String unrarPath) throws RarException, IOException, Exception{
        File srcFile = new File(srcPath);
        if(null == unrarPath || "".equals(unrarPath)){
            unrarPath = srcFile.getParentFile().getPath();
        }
        // 保证文件夹路径最后是"/"或者"\"
        char lastChar = unrarPath.charAt(unrarPath.length() - 1);
        if (lastChar != '/' && lastChar != '\\') {
            unrarPath += File.separator;
        }
        Log.d(TAG,"unrar file to :"+unrarPath);

        unrar(srcFile, unrarPath);
    }

    private static void unrar(File srcFile,String unrarPath) throws RarException, IOException, Exception{
        FileOutputStream fileOut = null;
        Archive rarfile = null;

        try{
            rarfile = new Archive(srcFile);
            FileHeader fh = rarfile.nextFileHeader();
            while(fh!=null){

                String entrypath = "";
                if(fh.isUnicode()){//解決中文乱码
                    entrypath = fh.getFileNameW().trim();
                }else{
                    entrypath = fh.getFileNameString().trim();
                }
                entrypath = entrypath.replaceAll("\\\\", "/");

                File file = new File(unrarPath + entrypath);
                Log.d(TAG,"unrar entry file :"+file.getPath());

                if(fh.isDirectory()){
                    file.mkdirs();
                }else{
                    File parent = file.getParentFile();
                    if(parent!=null && !parent.exists()){
                        parent.mkdirs();
                    }
                    fileOut = new FileOutputStream(file);
                    rarfile.extractFile(fh, fileOut);
                    fileOut.close();
                }
                fh = rarfile.nextFileHeader();
            }
            rarfile.close();

        } catch (Exception e) {
            throw e;
        } finally {
            if (fileOut != null) {
                try {
                    fileOut.close();
                    fileOut = null;
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if (rarfile != null) {
                try {
                    rarfile.close();
                    rarfile = null;
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }


    /**
     * 需要commons-compress-1.18.jar
     */

//    /**
//     * 解压缩7z文件
//     * @param file 压缩包文件
//     * @param targetPath 目标文件夹
//     * @param delete 解压后是否删除原压缩包文件
//     */
//    private static void decompress7Z(File file, String targetPath,  boolean delete){
//        SevenZFile sevenZFile = null;
//        OutputStream outputStream = null;
//        try {
//            sevenZFile = new SevenZFile(file);
//            // 创建输出目录
//            createDirectory(targetPath, null);
//            SevenZArchiveEntry entry;
//
//            while((entry = sevenZFile.getNextEntry()) != null){
//                if(entry.isDirectory()){
//                    createDirectory(targetPath, entry.getName()); // 创建子目录
//                }else{
//                    outputStream = new FileOutputStream(new File(targetPath + File.separator + entry.getName()));
//                    int len = 0;
//                    byte[] b = new byte[2048];
//                    while((len = sevenZFile.read(b)) != -1){
//                        outputStream.write(b, 0, len);
//                    }
//                    outputStream.flush();
//                }
//            }
//        } catch (IOException e) {
//            e.printStackTrace();
//        }finally {
//            try {
//                if(sevenZFile != null){
//                    sevenZFile.close();
//                }
//                if(outputStream != null){
//                    outputStream.close();
//                }
//            } catch (IOException e) {
//                e.printStackTrace();
//            }
//        }
//    }
}