java 通過7z 進行壓縮加密

首先我們先來看一下效果圖

要完成7z的壓縮加密，我們首先先要下載7z工具，這個可以到官網自行下載，接下來我們只需將7z.dll,7z.exe,7z.sfx將這幾個文件放在我們的工程目錄，然後去引用即可。

關鍵代碼示例：

private boolean zipByExternal(String zipFileName, String[] zipContentFileNameList, String compressionType, String password) throws Exception {
        Runtime runtime = null;
        Process process = null;
        String command = "";
        StringBuffer sbFilePath = null;
        StringBuffer sbZipResult = null;
        String zipLibPath = "";
        String result = "";
        InputStream inputStream = null;
        int value = 0;
        boolean isSuccess = false;
        try{

            if (!isContainData(zipFileName)){
                throw new Exception(ERROR_MSG_NOT_OUTPUT_PATH);
            }

            if (zipContentFileNameList != null && zipContentFileNameList.length > 0){
                for (int i=0; i<zipContentFileNameList.length; i++){
                    if (!FileUtil.fileIsExist(zipContentFileNameList[i])){
                        throw new Exception(ERROR_MSG_COMPRESSION_NO_ATTACHMENT_FILE);
                    }
                }
            }else{
                throw new Exception(ERROR_MSG_COMPRESSION_NO_ATTACHMENT_FILE);
            }

            if (!isContainData(compressionType)){
                throw new Exception(ERROR_MSG_NOT_OUTPUT_PATH);
            }

            if (!isContainData(compressionType)){
                throw new Exception(ERROR_MSG_COMPRESSION_INVALID_TYPE);
            }

            zipLibPath = Sevent_HOME_PATH + schoolId +  File.separator + Sevent_COMMON_PATH + Sevent_ZIP_PATH;

            runtime = Runtime.getRuntime();
            sbFilePath = new StringBuffer(100);
            sbZipResult = new StringBuffer();

            for (int i=0; i<zipContentFileNameList.length; i++){
                sbFilePath.append(zipContentFileNameList[i] + " ");
            }

            if (COMPRESSION_TYPE_EXE.equals(compressionType)){
                if (zipFileName.toLowerCase().indexOf(COMPRESSION_TYPE_EXE.toLowerCase()) < 0){
                    throw new Exception(ERROR_MSG_COMPRESSION_TYPE_NOT_MATCH);
                }

                if (isContainData(password)){
                    //command = zipLibPath + Sevent_ZIP_EXE +" a -p" + password + " -mhe -sfx7z.sfx " + zipFileName + " " + sbFilePath;
                    command = root_path + File.separator + Sevent_ZIP_EXE +" a -p" + password + " -mhe -sfx7z.sfx " + zipFileName + " " + sbFilePath;
                }else{
                    //command = zipLibPath + Sevent_ZIP_EXE +" a -mhe -sfx7z.sfx " + zipFileName + " " + sbFilePath;
                    command = root_path + File.separator + Sevent_ZIP_EXE +" a -mhe -sfx7z.sfx " + zipFileName + " " + sbFilePath;
                }
            }else if (COMPRESSION_TYPE_ZIP.equals(compressionType)){
                if (zipFileName.toLowerCase().indexOf(COMPRESSION_TYPE_ZIP.toLowerCase()) < 0){
                    throw new Exception(ERROR_MSG_COMPRESSION_TYPE_NOT_MATCH);
                }

                if (isContainData(password)){
                    //command = zipLibPath + Sevent_ZIP_EXE +" a -mem=aes -p" + password + " -tzip " + zipFileName + " " + sbFilePath;
                    command = root_path + File.separator + Sevent_ZIP_EXE +" a -mem=aes -p" + password + " -tzip " + zipFileName + " " + sbFilePath;
                }else{
                    //command = zipLibPath + Sevent_ZIP_EXE +" a -mem=aes -tzip " + zipFileName + " " + sbFilePath;
                    command = root_path + File.separator + Sevent_ZIP_EXE +" a -mem=aes -tzip " + zipFileName + " " + sbFilePath;
                }
            }
            process = runtime.exec(command);
            inputStream = process.getInputStream();
            while ((value = inputStream.read()) != -1)
            {
                sbZipResult.append((char) value);
            }

            result = new String(sbZipResult.toString().getBytes("ISO-8859-1"), "GBK");
            if (result.toLowerCase().indexOf(SUCCESS_KEYWORD.toLowerCase()) >= 0){
                isSuccess = true;
            }

            inputStream.close();
            inputStream = null;


        }catch (Exception e){
            e.printStackTrace();
            throw new Exception(ERROR_MSG_UNKNOWN_ERROR);
        }finally{
            try{
                if (inputStream != null){
                    inputStream.close();
                    inputStream = null;
                }
            }catch (Exception e){}
            return isSuccess;
        }
    }

由示例代碼可知，我們這裏會創建一個線程來執行我們的壓縮動作，
由於7z支持exe壓縮和zip壓縮，所以這裏我們做了類型判斷，接下來只需要執行7z自帶的命令即可進行打包壓縮了，由於這裏是調用shell命令，所以我們只能通過執行runtime.exec(command);來運行。
接着只需將運行好的文件以字節的形式輸出即可
資源下載