java学习的一点记录

public class Tools
{

    static OMSLog log = Tools.getLog(Tools.class);

    /**
     * 文件内容集合 key ：实际文件名称 value ：Map<实际文件中的sheet名称, Map<表字段名称,
     * String[文件中列索引，文件中实际列名]>>
     */
    private static Map<String, Map<String, Map<String, String[]>>> fileMap =
        null;

    /**
     * 名称集合 <文件名称，<实际文件中的sheet名称,表名（常量）>
     */
    private static Map<String, Map<String, String>> fileNameMap = null;

    /**
     * 表名称对应的列集合 <表名，<列名,String[文件中列索引，文件中实际列名]>
     */
    private static Map<String, Map<String, String[]>> tableMap = null;

    /**
     * 数据表集合 key ：表名（常量） value ：map<列索引,列名>
     */
    private static Map<String, Map<Integer, String>> dataBaseMap = null;

    /**
     * 文件下的sheet名称集合（按读入顺序）,导出
     */
    private static Map<String, List<String>> fileSheetNameMap = null;

    /**
     * 支持导出文件名称集合
     */
    private static List<String> exportFileNameList = null;

    /**
     * 插入
     */
    public final static int insert = 1;

    /**
     * 修改
     */
    public final static int update = 2;

    /**
     * 删除
     */
    public final static int delete = 3;

    /**
     * 文件语言版本
     */
    private static Map<String, String> fileLanguageVersion = null;

    /**
     * 取得日志
     *
     * @param clas
     * @return
     */
    public static OMSLog getLog(Class<?> clas)
    {
        String log4jName = getStringNoNull(System.getProperty("log4jname"));
        if (!"".equals(log4jName))
        {
            PropertyConfigurator.configure(Constant.PROJECT_DIR + "/config/"
                + log4jName + ".properties");
        }
        return OMSLogFactory.getLog(clas);
    }

    /**
     * 得到对应资源的资源实例
     *
     * @param resourceFilePath 资源文件路径
     * @return ResourceBundle 资源实例
     */
    public static ResourceBundle getResourceBundle(String resourceFilePath)
    {
        ResourceBundle resourceBundle =
            ResourceBundle.getBundle(resourceFilePath);
        return resourceBundle;
    }

    /**
     * 得到对应资源的资源实例
     *
     * @param resourceFilePath 资源文件路径
     * @return ResourceBundle 资源实例
     */
    public static ResourceBundle getResourceBundle(String resourceFilePath,
        Locale locale)
    {
        ResourceBundle resourceBundle =
            ResourceBundle.getBundle(resourceFilePath, locale);
        return resourceBundle;
    }

    /**
     * 得到属性文件实例
     */
    public static Properties getPropertiesByFile(String filePath)
    {
        InputStream inputStream = null;
        Properties properties = new Properties();
        try
        {
            File file = new File(filePath);
            inputStream = new FileInputStream(file);
            properties.load(inputStream);
        }
        catch (Exception e)
        {
            log.error(e.getMessage(), e);
        }
        finally
        {
            try
            {
                inputStream.close();
            }
            catch (IOException e)
            {
                log.error(e.getMessage(), e);
            }
        }
        return properties;
    }

    /**
     * 初始化导入文件功能的配置文件
     */
    private static void initConfig()
    {
        XMLReader reader = new XMLReader();
        fileMap = reader.readConfigXMLFile();
        dataBaseMap = reader.readDatabaseXMLFile();
        fileNameMap = reader.getSheetNameMap();
        exportFileNameList = reader.getExportFileNameList();
        tableMap = reader.getTableMap();
        fileSheetNameMap = reader.getFileSheetNameMap();
        fileLanguageVersion = reader.getFileLanguageVersion();
    }

    /**
     * 支持导出文件名称集合
     */
    public static List<String> getExportFileNameList()
    {
        if (exportFileNameList == null)
        {
            initConfig();
        }
        return exportFileNameList;
    }

    /**
     * 根据表名称从database.xml文件中得到表字段集合
     *
     * @param tableName 表名称
     * @return Map<Integer,String> 表字段集合<字段索引，字段名称>
     */
    public static Map<Integer, String> getColumnMapByTableName(String tableName)
    {
        if (dataBaseMap == null)
        {
            initConfig();
        }
        return dataBaseMap.get(tableName.toLowerCase(Locale.getDefault()));
    }

    /**
     * 得到对应的EXCEL文件内容集合
     *
     * @param fileName 文件名称
     * @return Map<String, Map<String, String[]>> EXCEL文件内容集合
     */
    public static Map<String, Map<String, String[]>> getSheetsByFile(
        String fileName)
    {
        if (fileMap == null)
        {
            initConfig();
        }
        return fileMap.get(fileName.toLowerCase(Locale.getDefault()));
    }

    /**
     * 得到对应的EXCEL文件内一个sheet页的内容集合
     *
     * @param fileName 文件名称
     * @param sheetName sheet页名称
     * @return Map<String, String[]> 一个sheet页的内容集合<表列字段名称,[文件列索引，文件列名]>
     */
    public static Map<String, String[]> getColumnBySheet(String fileName,
        String sheetName)
    {
        Map<String, Map<String, String[]>> map =
            getSheetsByFile(fileName.toLowerCase(Locale.getDefault()));
        return map.get(sheetName.toLowerCase(Locale.getDefault()));
    }

    /**
     * 得到表名对应配置的列属性集合
     *
     * @param fileName 表名称
     * @return Map<String, String[]> map<表列字段名称,[文件列索引，文件列名]>
     */
    public static Map<String, String[]> getColumnByTableName(String tableName)
    {
        if (tableMap == null)
        {
            initConfig();
        }
        return tableMap.get(tableName.toLowerCase(Locale.getDefault()));
    }

    /**
     * 得到EXCEL中sheet页对应的表名
     *
     * @param sheetName sheet页名
     * @return String 表名
     */
    public static String getTableName(String fileName, String sheetName)
    {
        if (fileNameMap == null)
        {
            initConfig();
        }
        return fileNameMap.get(fileName.toLowerCase(Locale.getDefault())).get(
            sheetName.toLowerCase(Locale.getDefault()));
    }

    /**
     * 得到EXCEL文件中sheet页的名称集合
     *
     * @return List<String> sheet页名集合，按读入顺序
     */
    public static List<String> getSheetNameByFileName(String fileName)
    {
        if (fileSheetNameMap == null)
        {
            initConfig();
        }
        return fileSheetNameMap.get(fileName.toLowerCase(Locale.getDefault()));
    }

    /**
     * 配置文件中的文件集合
     *
     * @return Map<实际文件中的sheet名称, Map<表字段名称, String[文件中列索引，文件中实际列名]>>
     */
    public static Map<String, Map<String, Map<String, String[]>>> getFileMap()
    {
        if (fileMap == null)
        {
            initConfig();
        }
        return fileMap;
    }

    /**
     * 取当前数据库中数据版本
     *
     * @return String 当前数据版本
     */
    public static int getDataBaseVersion(int languageId)
    {
        int version = 0;
        Connection connection = null;
        Statement statement = null;
        ResultSet rs = null;
        try
        {
            connection = JdbcUtil.getConnection();
            statement = connection.createStatement();
            rs =
                statement
                    .executeQuery("select Version,languageId from version where languageId="
                        + languageId);
            while (rs.next())
            {
                String s = rs.getString("version");
                version = Integer.parseInt(s);
            }
        }
        catch (DataBaseException e)
        {
            log.error(e.getMessage(), e);
        }
        catch (SQLException e)
        {
            log.error(e.getMessage(), e);
        }
        finally
        {
            JdbcUtil.release(rs, statement);
        }
        return version;
    }

    /**
     * 取出当前表中最大ID值
     *
     * @return 表中ID值
     */
    public static long getTableMaxID(String tableName, String idName)
    {
        long id = 0;
        Connection connection = null;
        Statement statement = null;
        ResultSet rs = null;
        try
        {
            connection = JdbcUtil.getConnection();
            statement = connection.createStatement();
            rs =
                statement.executeQuery("select max(" + idName + ") from  "
                    + tableName);
            while (rs.next())
            {
                id = rs.getLong(1);
            }
        }
        catch (DataBaseException e)
        {
            log.error(e.getMessage(), e);
        }
        catch (SQLException e)
        {
            log.error(e.getMessage(), e);
        }
        finally
        {
            JdbcUtil.release(rs, statement);
        }
        id++;
        return id;
    }

    /**
     * 取出当前表中最大ID值(默认ID列名称为“id”)
     *
     * @return 表中ID值
     */
    public static long getTableMaxID(String tableName)
    {
        return getTableMaxID(tableName, "id");
    }

    /**
     * 请空表数据
     *
     * @param histableName 表名
     * @throws DataBaseException
     */
    public static void clearTableData(String tableName)
        throws DataBaseException
    {
        String sql = "delete from " + tableName;
        PreparedStatement preparedStatement = null;
        try
        {
            preparedStatement = JdbcUtil.getConnection().prepareStatement(sql);
            preparedStatement.execute();
        }
        catch (SQLException e)
        {
            throw new DataBaseException(e.getMessage(), e);
        }
        finally
        {
            JdbcUtil.release(null, preparedStatement);
        }
    }

    /**
     * 从文件路径中取出文件名称，不包含文件类型后缀
     *
     * @param filePath
     * @return
     */
    public static String getFileNameFromFilePath(String filePath)
    {
        String fileName =
            filePath.substring(filePath.lastIndexOf("\\") + 1,
                filePath.lastIndexOf("."));
        // 处理有些文件配置路径为test/file.xml格式
        if (fileName.indexOf("/") != -1)
        {
            fileName =
                fileName.substring(fileName.lastIndexOf("/") + 1,
                    fileName.length());
        }
        return fileName;
    }

    /**
     * 获取操作类型
     *
     * @param action
     * @return
     */
    public static String getOperationByAction(int action)
    {
        String op = "";
        switch (action)
        {
            case insert:
                op = Constant.OPERATION_CREATE;
                break;
            case update:
                op = Constant.OPERATION_UPDATE;
                break;
            case delete:
                op = Constant.OPERATION_DELETE;
                break;
            default:
                break;
        }
        return op;
    }

    /**
     * 获取操作类型对应值
     *
     * @param action
     * @return
     */
    public static int getActionByOperation(String operation)
    {
        int action = 0;
        if (Constant.OPERATION_CREATE.equalsIgnoreCase(operation))
        {
            action = insert;
        }
        else if (Constant.OPERATION_UPDATE.equalsIgnoreCase(operation))
        {
            action = update;
        }
        else if (Constant.OPERATION_DELETE.equalsIgnoreCase(operation))
        {
            action = delete;
        }

        return action;
    }

    /**
     * 得到文件中配置版本号子，如果配置不正确返-1。
     *
     * @return int 文件中配置版本号
     */
    public static int getFileVersion(int languageId, ExcelReader excelReader)
    {
        int result = 0;
        try
        {
            Locale locale = Locale.getDefault();
            if (languageId == 1)
            {
                locale = Locale.CHINA;
            }
            else if (languageId == 2)
            {
                locale = Locale.US;
            }
            String fileVersion =
                getResourceBundle(
                    "com.huawei.idesign.tablesetdatas.dataprocess.properties.tool",
                    locale).getString("file_version");
            for (int i = 0; i < excelReader.getSheetNum(); i++)
            {
                String execlSheetName = excelReader.getSheetNameByIndex(i);
                if (fileVersion.equalsIgnoreCase(execlSheetName))
                {
                    List<List<String>> list = excelReader.getAllData(i);
                    String version = list.get(0).get(0);
                    result = (int) Double.parseDouble(version);
                }
            }
        }
        catch (Exception e)
        {
            log.error(e.getMessage(), e);
        }
        return result;
    }

    /**
     * 文件语言版本
     *
     * @return map<文件名，语言版本>
     */
    public static Map<String, String> getFileLanguageVersion()
    {
        if (fileLanguageVersion == null)
        {
            initConfig();
        }
        return fileLanguageVersion;
    }

    /**
     * 将excel中的列索引转换为下标
     *
     * @param op
     * @return
     */
    public static int getIndex(String op)
    {
        String alphabet = "abcdefghijklmnopqrstuvwxyz";
        try
        {
            // 如果是数字，直接返回，是字母再转换
            int index = Integer.parseInt(op) - 1;
            return index;
        }
        catch (NumberFormatException e)
        {
            String s = op.toLowerCase(Locale.getDefault());
            if (s.length() == 1)
            {
                return alphabet.indexOf(s);
            }
            else if (s.length() == 2)
            {
                String fir = s.substring(0, 1);
                String sed = s.substring(1, 2);
                int f =
                    (alphabet.indexOf(fir) + 1) * 26 + alphabet.indexOf(sed);
                return f;
            }
            else
            {
                return -1;
            }
        }

    }

    public static String getStringNoNull(Object str)
    {
        if (str == null)
        {
            return "";
        }
        else
        {
            return str.toString().trim();
        }
    }
   
public static String getPropertyByString(String key, String defaultValue)
{
  return getStringNoNull(Tools.getPropertiesByFile(
    Constant.CipherKey_FILE_PATH).getProperty(key, defaultValue));
}

/**
  * add fuqiang
  * 需要修改的properties键值对集合
  * @param listproperties
  * @see [类、类#方法、类#成员]
  */
public static void modifyProperties(Properties properties)
{
     InputStream inputStream = null;
     OutputStream  fos = null;
        Properties tempProper = new Properties();
        File file = new File(Constant.CipherKey_FILE_PATH);
        try
        {
            inputStream = new FileInputStream(file);
            tempProper.load(inputStream);
            fos = new FileOutputStream(file);
            tempProper.setProperty("userName", properties.getProperty("userName"));
            tempProper.setProperty("passwd", properties.getProperty("passwd"));
            tempProper.store(fos, null);
        }
        catch (Exception e)
        {
            log.error("Tools calss Setting PropertyValue is fail!"+e.getMessage());
        }finally
        {
            try
            {
                if(null != fos)
                {
                    fos.close();
                }
                if(null != inputStream)
                {
                    inputStream.close();
                }
            }
            catch (IOException e)
            {
                log.error("Tools calss close OutputStream fial!"+e.getMessage());
            }
        }
    
}
public static int getPropertyByInt(String key, int defaultValue)
{
  int result = defaultValue;

  String strValue = getStringNoNull(Tools.getPropertiesByFile(
    Constant.CipherKey_FILE_PATH).getProperty(key));

  try {
   result = Integer.parseInt(strValue);
  } catch (NumberFormatException e) {
   log.error(e.getMessage());
  }

  return result;
}
public static boolean authorise()
{
        /**
         * add fuqiang
         * 增加用户鉴权
         */
        boolean isLogin = false;
        try
        {
            //得到解密后的passwd值
            String  tempPasswd = CipherUtil.decryptPwd(getPropertyByString("passwd",""));
            //得到配置文件中的user值
            String tempUser = getPropertyByString("userName","");
            //得到配置的URL
            String tempUrl = getPropertyByString("url","");
            isLogin = HttpValidate.validConnector(tempUser, tempPasswd, tempUrl);
//             if("admin".equals(tempUser) && "admin".equals(tempPasswd))
//             {
//                 isLogin = true;
//             }
        }
        catch (Exception e1)
        {
            log.error("CFGSelectDialog calss Getting PropertyValue is fail!"+e1.getMessage());
        }
       
        return isLogin;
}

==================================================================================================================



public class XMLReader
{
    OMSLog log = Tools.getLog(this.getClass());

    private Map<String, Map<String, String>> fileNameMap =
        new HashMap<String, Map<String, String>>();

    private Map<String, Map<String, String[]>> tableMap =
        new HashMap<String, Map<String, String[]>>();

    private Map<String, List<String>> fileSheetNameMap =
        new HashMap<String, List<String>>();

    /**
     * 支持导出文件名称集合
     */
    List<String> exportFileNameList=new ArrayList<String>();
   
    /**
     * 文件语言版本
     */
    Map<String, String> fileLanguageVersion = new HashMap<String, String>();
   
   
    /**
     * 文件语言版本
     */
    public Map<String, String> getFileLanguageVersion()
    {
        return fileLanguageVersion;
    }

    /**
     * 支持导出文件名称集合
     */
    public List<String> getExportFileNameList()
    {
        return exportFileNameList;
    }

    /**
     * 文件下的sheet名称集合（按读入顺序）
     *
     * @return
     */
    public Map<String, List<String>> getFileSheetNameMap()
    {
        return fileSheetNameMap;
    }

    /**
     * 表名对应的Sheet页名称
     *
     * @return Map<文件名称,<Sheet页名称,数据库表名>>
     */
    public Map<String, Map<String, String>> getSheetNameMap()
    {
        return fileNameMap;
    }

    public Map<String, Map<String, String[]>> getTableMap()
    {
        return this.tableMap;
    }

    /**
     * 解析Sheet页节点下的所有列配置
     *
     * @param columnNodes 列节点List
     * @return Map<数据库表字段,对应Sheet页中的列名>
     */
    private Map<String, String[]> readcolumnNode(NodeList columnNodes)
    {
        Map<String, String[]> columnMap = new HashMap<String, String[]>();
        for (int k = 0; k < columnNodes.getLength(); k++)
        {
            Node columnNode = columnNodes.item(k);
            if (columnNode.getNodeType() == 1)
            {
                String tablecolumn =
                    columnNode.getAttributes().getNamedItem("tablecolumn")
                        .getNodeValue().trim().toLowerCase(Locale.getDefault());
                String columnName =
                    columnNode.getAttributes().getNamedItem("columnname")
                        .getNodeValue().trim().toLowerCase(Locale.getDefault());
                String index =
                    columnNode.getAttributes().getNamedItem("index")
                        .getNodeValue().trim();
                columnMap.put(tablecolumn, new String[] { index, columnName });
            }
        }
        return columnMap;
    }

    /**
     * 解析表节点下的所有列配置
     *
     * @param columnNodes 列节点List
     * @return Map<列索引,列名>
     */
    private Map<Integer, String> readColumnNode(NodeList columnNodes)
    {
        Map<Integer, String> columnMap = new HashMap<Integer, String>();
        for (int k = 0; k < columnNodes.getLength(); k++)
        {
            Node columnNode = columnNodes.item(k);
            if (columnNode.getNodeType() == 1)
            {
                String columnName =
                    columnNode.getAttributes().getNamedItem("name")
                        .getNodeValue().trim().toLowerCase(Locale.getDefault());
                String index =
                    columnNode.getAttributes().getNamedItem("index")
                        .getNodeValue().trim().toLowerCase(Locale.getDefault());
                columnMap.put(Integer.parseInt(index), columnName);
            }
        }
        return columnMap;
    }

  
    /**
     * 解析EXCEL文件配置文件
     *
     * @return Map<EXCEL文件名称,Map<Sheet页名称, Map<数据库表字段,对应Sheet页中的列名>>>
     */
    public Map<String, Map<String, Map<String, String[]>>> readConfigXMLFile()
    {
        String filePath =Constant.PROJECT_DIR+ Constant.CONFIG_FILE_PATH;
     
        DocumentBuilder builder;
        Document doc;
        Map<String, Map<String, Map<String, String[]>>> fileMap =
            new HashMap<String, Map<String, Map<String, String[]>>>();
        try
        {
            DocumentBuilderFactory factory =
                DocumentBuilderFactory.newInstance();
            builder = factory.newDocumentBuilder();
            log.info("Load file [" + filePath + "]");
            doc = builder.parse(new File(filePath));
            Element root = doc.getDocumentElement();

            NodeList nodeList = root.getElementsByTagName("excelfile");

            for (int i = 0; i < nodeList.getLength(); i++)
            {
                Node excelfileNode = nodeList.item(i);
                if (excelfileNode.getNodeType() == 1)
                {
                    String excelfileName =
                        excelfileNode.getAttributes().getNamedItem("filename")
                            .getNodeValue().trim()
                            .toLowerCase(Locale.getDefault());
                    String isExport= excelfileNode.getAttributes().getNamedItem("supportExport")
                    .getNodeValue().trim();
                   
                    String language= excelfileNode.getAttributes().getNamedItem("language")
                    .getNodeValue().trim();
                    //保存支持导出文件名称
                    if (Boolean.valueOf(isExport))
                    {
                        exportFileNameList.add(excelfileName);
                    }
                   
                    fileLanguageVersion.put(excelfileName, language);
                   
                    NodeList sheetNodes = excelfileNode.getChildNodes();
                    fileMap.put(excelfileName,
                        readSheetNode(excelfileName, sheetNodes));
                }
            }
        }
        catch (Exception e)
        {
            log.error(e.getMessage(), e);
        }
        return fileMap;
    }

    /**
     * 读取数据库配置表信息
     *
     * @return Map<表名,Map<列索引,列名>>
     */
    public Map<String, Map<Integer, String>> readDatabaseXMLFile()
    {
        String filePath = Constant.PROJECT_DIR+Constant.DATABASE_FILE_PATH;
        DocumentBuilder builder;
        Document doc;
        Map<String, Map<Integer, String>> fileMap =
            new HashMap<String, Map<Integer, String>>();
        try
        {
            DocumentBuilderFactory factory =
                DocumentBuilderFactory.newInstance();
            builder = factory.newDocumentBuilder();
            log.info("Load file [" + filePath + "]");
            doc = builder.parse(new File(filePath));
            Element root = doc.getDocumentElement();

            NodeList nodeList = root.getElementsByTagName("table");

            for (int i = 0; i < nodeList.getLength(); i++)
            {
                Node excelfileNode = nodeList.item(i);
                if (excelfileNode.getNodeType() == 1)
                {
                    String tableName =
                        excelfileNode.getAttributes().getNamedItem("name")
                            .getNodeValue().trim()
                            .toLowerCase(Locale.getDefault());
                    NodeList columnNodes = excelfileNode.getChildNodes();
                    fileMap.put(tableName, readColumnNode(columnNodes));
                }
            }
        }
        catch (Exception e)
        {
            log.error(e.getMessage(), e);
        }
        return fileMap;
    }

    /**
     * 解析文件节点下的所有Sheet页配置
     *
     * @param columnNodes Sheet页节点List
     * @return Map<Sheet页名称, Map<数据库表字段,对应Sheet页中的列名>>
     */
    private Map<String, Map<String, String[]>> readSheetNode(
        String excelfileName, NodeList sheetNodes)
    {
        Map<String, Map<String, String[]>> sheetMap =
            new HashMap<String, Map<String, String[]>>();
        Map<String, String> sheetNameMap = new HashMap<String, String>();
        List<String> list = new ArrayList<String>();
        for (int k = 0; k < sheetNodes.getLength(); k++)
        {
            Node sheetNode = sheetNodes.item(k);
            if (sheetNode.getNodeType() == 1)
            {
                String tableName =
                    sheetNode.getAttributes().getNamedItem("tableName")
                        .getNodeValue().trim().toLowerCase(Locale.getDefault());
                String sheetName =
                    sheetNode.getAttributes().getNamedItem("sheetname")
                        .getNodeValue().trim().toLowerCase(Locale.getDefault());
                sheetNameMap.put(sheetName, tableName);
                NodeList columnNodes = sheetNode.getChildNodes();
                Map<String, String[]> columnMap = readcolumnNode(columnNodes);
                sheetMap.put(sheetName, columnMap);
                if (tableMap.containsKey(tableName))
                {
                    tableName = tableName + "_" + sheetName;
                }
                tableMap.put(tableName, columnMap);
                list.add(sheetName);
            }
        }
        fileNameMap.put(excelfileName, sheetNameMap);
        fileSheetNameMap.put(excelfileName, list);
        return sheetMap;
    }

=========================================================================================================================

加密与解密

public class CipherUtil
{

    private static OMSLog log = Tools.getLog(CipherUtil.class);

    private static String CIPHER_TYPE = "AES";

    private static String CIPHER_MODE = "AES/ECB/PKCS5Padding";

    /**
     * 用AES算法解密
     */
    public static String decryptPwd(String input)
        throws NoSuchAlgorithmException, NoSuchPaddingException,
        InvalidKeyException, IOException, IllegalBlockSizeException,
        BadPaddingException
    {
       
        return decryptPwd(input,false);
    }
   
    /**
     * 服务端用AES算法解密
     */
    public static String decryptPwd(String input,boolean isServer)
        throws NoSuchAlgorithmException, NoSuchPaddingException,
        InvalidKeyException, IOException, IllegalBlockSizeException,
        BadPaddingException
    {
        byte[] keydata = isServer?getKey(Constant.CipherKey_SERVER_FILE_PATH):getKey();
       
        SecretKeySpec key = new SecretKeySpec(keydata, 0, 16, CIPHER_TYPE);
        Cipher cipher = Cipher.getInstance(CIPHER_MODE);
        cipher.init(Cipher.DECRYPT_MODE, key);
        BASE64Decoder decoder = new BASE64Decoder();
        byte[] data = decoder.decodeBuffer(input);
        byte[] decryptData = cipher.doFinal(data, 0, data.length);
        return new String(decryptData);
    }

    /**
     * 用AES算法加密
     *
     * @throws IOException
     */
    public static String encryptPwd(String input)
        throws NoSuchAlgorithmException, NoSuchPaddingException,
        InvalidKeyException, IllegalBlockSizeException, BadPaddingException,
        IOException
    {
        SecretKeySpec key = new SecretKeySpec(getKey(), 0, 16, CIPHER_TYPE);
        Cipher cipher = Cipher.getInstance(CIPHER_MODE);
        cipher.init(Cipher.ENCRYPT_MODE, key);
        byte[] bs = cipher.doFinal(input.getBytes());
        return new sun.misc.BASE64Encoder().encode(bs);
    }

    /**
     * 生成AES加密密钥
     *
     * @throws IOException
     * @throws NoSuchPaddingException
     * @throws NoSuchAlgorithmException
     * @throws InvalidKeyException
     * @throws BadPaddingException
     * @throws IllegalBlockSizeException
     */
    private static byte[] getKey()
        throws NoSuchAlgorithmException, NoSuchPaddingException,
        InvalidKeyException, IllegalBlockSizeException, BadPaddingException,
        IOException
    {
        return getKey(Constant.CipherKey_FILE_PATH);
    }

    /**
     * 生成AES加密密钥
     *
     * @throws IOException
     * @throws NoSuchPaddingException
     * @throws NoSuchAlgorithmException
     * @throws InvalidKeyException
     * @throws BadPaddingException
     * @throws IllegalBlockSizeException
     */
    private static byte[] getKey(String path)
        throws NoSuchAlgorithmException, NoSuchPaddingException,
        InvalidKeyException, IllegalBlockSizeException, BadPaddingException,
        IOException
    {
        String initKey = "ci~+Ides5ign*1=)";
        String input =
            Tools.getStringNoNull(Tools.getPropertiesByFile(
                path).getProperty("CipherKey"));
        SecretKeySpec key = new SecretKeySpec(initKey.getBytes(), CIPHER_TYPE);
        Cipher cipher = Cipher.getInstance(CIPHER_MODE);
        cipher.init(Cipher.ENCRYPT_MODE, key);
        byte[] bs = cipher.doFinal(input.getBytes());
        return bs;
    }

=========================

http://www.iteye.com/topic/1122076