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搜索[数据脱敏],共10000篇文章
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数据||HDFS的API在JAVA中进行新增、删除、查看目录

1、在HDFS文件系统中新增目录 新增代码 查看结果 2、删除目录 删除代码 查看结果 3、查看目录 代码 执行结果 代码 package com.lizh.hadoop.hdfs; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.FSDataInputStream; import org.apache.hadoop.fs.FSDataOutputStream; import org.apache.hadoop.fs.FileStatus; import org.apache.hadoop.fs.FileSystem; import org.apache.hadoop.fs.Path; import org.apache.hadoop.io.IOUtils; public class HdfsApp { public static FileSystem getFileSystem() throws IOException{ Configuration conf = new Configuration(); FileSystem fs = FileSystem.get(conf); return fs; } /** * 利用HDSF的api读取文件内容 * @param path1 */ public static void readFile(String path1) { try { FileSystem fs = getFileSystem(); Path path = new Path(path1); FSDataInputStream in = fs.open(path); IOUtils.copyBytes(in, System.out, 4000, false); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } } /** * 利用HDFS的api上传文件 */ public static void putFile(){ //把/opt/modules/hadoop-2.5.0/wc.input 内容写入到 /user/beifeng/put-wc.input //write file FileInputStream fisin =null; FSDataOutputStream fsoutstream =null; try { String filename="/user/beifeng/put-wc.input";//文件系统目录 Path inputpath = new Path(filename); FileSystem fs = getFileSystem();//获取文件系统 fsoutstream = fs.create(inputpath); fisin = new FileInputStream(new File("/opt/modules/hadoop-2.5.0/wc.input"));//本地系统目录文件 IOUtils.copyBytes(fisin, fsoutstream, 4000, false); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); }finally{ IOUtils.closeStream(fsoutstream); IOUtils.closeStream(fisin); } } /** * 利用HDFS的api创建目录 */ public static void createDir(String filepath){ try { FileSystem fs = getFileSystem();//获取文件系统 fs.mkdirs(new Path(filepath)); fs.close(); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } } /** * 删除目录 * @param filepath */ public static void deleteDir(String filepath){ try { FileSystem fs = getFileSystem();//获取文件系统 fs.deleteOnExit(new Path(filepath)); fs.close(); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } } public static void listDir(){ try { FileSystem fs = getFileSystem();//获取文件系统 FileStatus[] fslarray = fs.listStatus(new Path("/user/beifeng")); for(FileStatus files:fslarray){ System.out.println(files.getPath()); } fs.close(); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); }finally{ } } public static void main(String[] args) throws Exception{ listDir(); } }

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sklearn.feature_extraction.DictVectorizer将字典格式的数据转换为特征

class sklearn.feature_extraction. DictVectorizer ( dtype=<class ‘numpy.float64’> , separator=’=’ , sparse=True , sort=True ) Transforms lists of feature-value mappings to vectors. This transformer turns lists of mappings (dict-like objects ) of feature names to feature values into Numpy arrays or scipy. sparse matrices(稀疏矩阵) for use with scikit-learn estimators. When feature values are strings, this transformer will do a binary one-hot (aka one-of-K) coding: one boolean-valued feature is constructed for each of the possible string values that the feature can take on. For instance, a feature “f” that can take on the values “ham” and “spam” will become two features in the output, one signifying “f=ham”, the other “f=spam”. However, note that this transformer will only do a binary one-hot encoding when feature values are of type string. If categorical features are represented as numeric values such as int, the DictVectorizer can be followed by OneHotEncoder to complete binary one-hot encoding. Features that do not occur in a sample (mapping) will have a zero value in the resulting array/matrix. Read more in the User Guide . Parameters: dtype : callable, optional The type of feature values. Passed to Numpy array/scipy.sparse matrix constructors as the dtype argument. separator : string, optional Separator string used when constructing new features for one-hot coding. sparse : boolean, optional. Whether transform should produce scipy.sparse matrices. True by default. sort : boolean, optional. Whether feature_names_ and vocabulary_ should be sorted when fitting. True by default. Attributes: vocabulary_ : dict A dictionary mapping feature names to feature indices. feature_names_ : list A list of length n_features containing the feature names (e.g., “f=ham” and “f=spam”).

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Nacos

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Nacos /nɑ:kəʊs/ 是 Dynamic Naming and Configuration Service 的首字母简称,一个易于构建 AI Agent 应用的动态服务发现、配置管理和AI智能体管理平台。Nacos 致力于帮助您发现、配置和管理微服务及AI智能体应用。Nacos 提供了一组简单易用的特性集,帮助您快速实现动态服务发现、服务配置、服务元数据、流量管理。Nacos 帮助您更敏捷和容易地构建、交付和管理微服务平台。

Rocky Linux

Rocky Linux

Rocky Linux(中文名:洛基)是由Gregory Kurtzer于2020年12月发起的企业级Linux发行版,作为CentOS稳定版停止维护后与RHEL(Red Hat Enterprise Linux)完全兼容的开源替代方案,由社区拥有并管理,支持x86_64、aarch64等架构。其通过重新编译RHEL源代码提供长期稳定性,采用模块化包装和SELinux安全架构,默认包含GNOME桌面环境及XFS文件系统,支持十年生命周期更新。

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Sublime Text具有漂亮的用户界面和强大的功能,例如代码缩略图,Python的插件,代码段等。还可自定义键绑定,菜单和工具栏。Sublime Text 的主要功能包括:拼写检查,书签,完整的 Python API , Goto 功能,即时项目切换,多选择,多窗口等等。Sublime Text 是一个跨平台的编辑器,同时支持Windows、Linux、Mac OS X等操作系统。

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