java Runtime.getRuntime().exec 调用系统脚本/命令注意事项

    /**
     * 数据加密处理
     * 
     * @param data 要加密的数据
     * @param commonKey 加密口令文件名
     * @return　加密数据
     */
    public static final synchronized String encryption(String data, String commonKey){
        // 加密后的数据定义
        String encryptionData = "";    
        
        try {
            // 加密命令
            String encryption = "echo -E \"{0}\" | openssl aes-128-cbc -e -kfile {1} -base64";
            
            // 替换命令中占位符
            encryption = MessageFormat.format(encryption, data, commonKey);
            
            String[] sh = new String[]{"/bin/sh", "-c", encryption};
            
            // Execute Shell Command
            ProcessBuilder pb = new ProcessBuilder(sh);
            
            Process p = pb.start();
            
            encryptionData = getShellOut(p);

        } catch (Exception e) {
            throw new EncryptionException(e);
        }
        
        return encryptionData;
    }

    /**
     * 读取输出流数据
     * 
     * @param p 进程
     * @return 从输出流中读取的数据
     * @throws IOException
     */
    public static final String getShellOut(Process p) throws IOException{
        
        StringBuilder sb = new StringBuilder();
        BufferedInputStream in = null;
        BufferedReader br = null;
        
        try {
            
            in = new BufferedInputStream(p.getInputStream());
            br = new BufferedReader(new InputStreamReader(in));
            String s;
            
            while ((s = br.readLine()) != null) {
                // 追加换行符
                sb.append(ConstantUtil.LINE_SEPARATOR);
                
                sb.append(s);
            }
            
        } catch (IOException e) {
            throw e;
        } finally {
            br.close();
            in.close();
        }
        
        return sb.toString();
    }