java io教程_Java IO教程

约定不等于承诺〃 2023-02-28 08:42 27阅读 0赞

java io教程

Java provides several classes in `java.io` package to work with text, stream data, and file system. I have provided several examples on Java Files and Java IO recently. This post is an index of all Java IO articles.

Java在`java.io`包中提供了几个类来处理文本，流数据和文件系统。 我最近提供了一些有关Java文件和Java IO的示例。 这篇文章是所有Java IO文章的索引。

## Java IO **(**Java IO**)** ##

1.  **[How to Create New File in Java][]**
    
    In this post, you will learn how to create a new file in java program and use of “**file.separator**” system property to make our program platform independent.
    
    **[如何用Java创建新文件][How to Create New File in Java]**
    
    在本文中，您将学习如何在Java程序中创建一个新文件，以及如何使用“ **file.separator** ”系统属性来使我们的程序平台独立。
2.  **[How to delete a File in Java][]**
    
    This post explains how to delete a file or empty directory in java, notice that delete doesn’t throw any exception even if directory is not empty and not deleted.
    
    **[如何用Java删除文件][How to delete a File in Java]**
    
    这篇文章解释了如何在Java中删除文件或空目录，请注意，即使目录不为空且未删除，删除也不会引发任何异常。
3.  **[Java File separator, separatorChar, pathSeparator, pathSeparatorChar Explained with Example][Java File separator_ separatorChar_ pathSeparator_ pathSeparatorChar Explained with Example]**
    
    Learn about the four separator static variables of File class.
    
    **[Java文件分隔符，separatorChar，pathSeparator，pathSeparatorChar用示例解释][Java File separator_ separatorChar_ pathSeparator_ pathSeparatorChar Explained with Example]**
    
    了解File类的四个分隔符静态变量。
4.  **[How to delete non empty directory in Java][]**
    
    A recursive program to delete non-empty directories in java.
    
    **[如何在Java中删除非空目录][How to delete non empty directory in Java]**
    
    删除Java中非空目录的递归程序。
5.  **[Rename file or Move file in Java][]**
    
    Learn how easily you can rename a file or move it into other directory in java.
    
    **[用Java重命名文件或移动文件][Rename file or Move file in Java]**
    
    了解如何轻松地重命名文件或将其移动到Java中的其他目录。
6.  **[File Size in Java][]**
    
    Learn how to get the file size in java program.
    
    **[Java中的文件大小][File Size in Java]**
    
    了解如何在Java程序中获取文件大小。
7.  **[Get File Extension in Java][]**
    
    Java File doesn’t have any method to get file extension, a utility program showing how to get file extension in java.
    
    **[获取Java文件扩展名][Get File Extension in Java]**
    
    Java File没有任何方法来获取文件扩展名，这是一个实用程序，显示了如何在Java中获取文件扩展名。
8.  **[Check File Exists in Java][]**
    
    Learn how to check if file exists or not in java.
    
    **[检查Java中文件是否存在][Check File Exists in Java]**
    
    了解如何在Java中检查文件是否存在。
9.  **[How to check if File is Directory?][How to check if File is Directory]**
    
    Learn how to find out if the file is actually a directory.
    
    **[如何检查文件是否为目录？][How to check if File is Directory]**
    
    了解如何确定文件是否实际上是目录。
10. **[File Last Modified Date in Java][]**
    
    Find out how to get last modified date of a file in java.
    
    **[用Java文件上次修改日期][File Last Modified Date in Java]**
    
    了解如何在Java中获取文件的最后修改日期。
11. **[Java FileNameFilter Example][]**
    
    Learn how to use FileNameFilter to list files with specific extension in java.
    
    **[Java FileNameFilter示例][Java FileNameFilter Example]**
    
    了解如何使用FileNameFilter在Java中列出具有特定扩展名的文件。
12. **[Java File Path, Absolute Path and Canonical Path Explained][Java File Path_ Absolute Path and Canonical Path Explained]**
    
    Learn the difference between different types of file paths in java.
    
    **[Java文件路径，绝对路径和规范路径介绍][Java File Path_ Absolute Path and Canonical Path Explained]**
    
    了解Java中不同类型的文件路径之间的区别。
13. **[Java File Permissions][]**
    
    Learn how to get the file permissions for the application user in java program and how to set permissions using File class.
    
    **[Java文件权限][Java File Permissions]**
    
    了解如何在Java程序中获取应用程序用户的文件权限，以及如何使用File类设置权限。
14. **[How to set File Permissions in Java Easily using Java 7 PosixFilePermission][]**
    
    Learn the pitfalls of using File class to set permissions and why Java 7 PosixFilePermission are the best way to set file permissions in java.
    
    **[如何使用Java 7 PosixFilePermission轻松在Java中设置文件权限][How to set File Permissions in Java Easily using Java 7 PosixFilePermission]**
    
    了解使用File类设置权限的陷阱，以及为什么Java 7 PosixFilePermission是在Java中设置文件权限的最佳方法。
15. **[Copy File in Java][]**
    
    Learn how to copy file using Stream, FileChannel, Apache Commons IO and Java 7 Files class and which is the best way to copy file in java.
    
    **[用Java复制文件][Copy File in Java]**
    
    了解如何使用Stream，FileChannel，Apache Commons IO和Java 7 Files类复制文件，这是在Java中复制文件的最佳方法。
16. **[Open File in Java][]**
    
    Learn how to open a file in associated application using java.awt.Desktop class.
    
    **[用Java打开文件][Open File in Java]**
    
    了解如何使用java.awt.Desktop类在关联的应用程序中打开文件。
17. **[Read File in Java][]**
    
    Learn how to read file using FileReader, BufferedReader, Scanner class and Java 7 Files class and find out how to get encoding support and best way to read file in java.
    
    **[用Java读取文件][Read File in Java]**
    
    了解如何使用FileReader，BufferedReader，Scanner类和Java 7 Files类读取文件，并了解如何获得编码支持以及在Java中读取文件的最佳方法。
18. **[Java File Scanner Example][]**
    
    Learn how to use Scanner class to read complete file, parse a file based on regular expression and tokens.
    
    **[Java文件扫描程序示例][Java File Scanner Example]**
    
    了解如何使用Scanner类读取完整文件，基于正则表达式和标记解析文件。
19. **[Read a File to String in Java][]**
    
    Learn how to read the complete file into a String in java.
    
    **[用Java将文件读取为字符串][Read a File to String in Java]**
    
    了解如何在Java中将完整文件读入字符串。
20. **[Java read file line by line][]**
    
    Learn how to read file line by line in java, good for working with large files in java.
    
    **[Java逐行读取文件][Java read file line by line]**
    
    了解如何在Java中逐行读取文件，非常适合在Java中处理大型文件。
21. **[Write a File in Java][]**
    
    Learn how to write a file using FileWriter, BufferedWriter, Java 7 Files class and FileOutputStream and which one to choose based on your project requirements.
    
    **[用Java编写文件][Write a File in Java]**
    
    了解如何使用FileWriter，BufferedWriter，Java 7 Files类和FileOutputStream编写文件，以及如何根据项目要求选择哪种文件。
22. **[Append Text to File in Java][]**
    
    Learn how to append data to existing file in java.
    
    **[在Java中将文本追加到文件][Append Text to File in Java]**
    
    了解如何在Java中将数据附加到现有文件。
23. **[Java InputStream to File Example][]**
    
    Learn how to convert InputStream to file in java using OutputStream.
    
    **[Java InputStream到文件的示例][Java InputStream to File Example]**
    
    了解如何使用OutputStream在Java中将InputStream转换为文件。
24. **[Java Random Access File][]**
    
    An example showing usage of Java RandomAccessFile to read and write data to specific index in file.
    
    **[Java随机访问文件][Java Random Access File]**
    
    一个示例，展示了如何使用Java RandomAccessFile读取数据并将数据写入文件中的特定索引。
25. **[Download File from URL][]**
    
    Learn how to download a file from URL in java program.
    
    **[从URL下载文件][Download File from URL]**
    
    了解如何在Java程序中从URL下载文件。
26. **[How to write Object to File in Java][]**
    
    Learn how to save object to a file in java using Serialization.
    
    **[如何用Java将对象写入文件][How to write Object to File in Java]**
    
    了解如何使用序列化将对象保存到Java中的文件中。
27. **[How to read Object from File in Java][]**
    
    Learn how to create Object from file in java using Deserialization.
    
    **[如何在Java中从文件读取对象][How to read Object from File in Java]**
    
    了解如何使用反序列化从Java中的文件创建对象。
28. **[How to Compile and Run a Java Program in another Java program][]**
    
    A misc program showing how can we compile and run java program from another java program.
    
    **[如何在另一个Java程序中编译和运行Java程序][How to Compile and Run a Java Program in another Java program]**
    
    一个杂项程序，显示我们如何从另一个Java程序编译和运行Java程序。
29. **[Java Property File and Property XML][]**
    
    Learn how to read and write property file and property xml files in java.
    
    **[Java属性文件和属性XML][Java Property File and Property XML]**
    
    了解如何在Java中读写属性文件和属性xml文件。
30. **[Compress File or Directory using Java ZIP][]**
    
    In this article, you will learn how to compress a file in ZIP format, the example shows how to recursively compress a directory to ZIP format.
    
    **[使用Java ZIP压缩文件或目录][Compress File or Directory using Java ZIP]**
    
    在本文中，您将学习如何以ZIP格式压缩文件，该示例显示了如何以递归方式将目录压缩为ZIP格式。
31. **[Java Unzip File Example][]**
    
    In this article, you will learn how to decompress a zip archive.
    
    **[Java解压缩文件示例][Java Unzip File Example]**
    
    在本文中，您将学习如何解压缩zip存档。
32. **[Java GZIP Example][]**
    
    In this article, you will learn how to compress a file in GZIP format and then how to decompress it in Java.
    
    **[Java GZIP示例][Java GZIP Example]**
    
    在本文中，您将学习如何以GZIP格式压缩文件，然后在Java中解压缩该文件。
33. **[Java Temp File][]**
    
    Java provides API to create temporary files to be used by the program, the file names are random so it’s hard to hack it. Learn how to create temp files in Java and read/write data into them.
    
    **[Java临时文件][Java Temp File]**
    
    Java提供了API来创建供程序使用的临时文件，文件名是随机的，因此很难对其进行破解。 了解如何在Java中创建临时文件以及如何向其中读取/写入数据。

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> 翻译自: [https://www.journaldev.com/942/java-io-tutorial][https_www.journaldev.com_942_java-io-tutorial]

java io教程

[How to Create New File in Java]: https://www.journaldev.com/825/java-create-new-file
[How to delete a File in Java]: https://www.journaldev.com/830/java-delete-file-directory
[Java File separator_ separatorChar_ pathSeparator_ pathSeparatorChar Explained with Example]: https://www.journaldev.com/851/java-file-separator-separatorchar-pathseparator-pathseparatorchar
[How to delete non empty directory in Java]: https://www.journaldev.com/833/java-delete-directory-folder
[Rename file or Move file in Java]: https://www.journaldev.com/836/java-rename-file-jave-move-file
[File Size in Java]: https://www.journaldev.com/839/java-get-file-size
[Get File Extension in Java]: https://www.journaldev.com/842/java-get-file-extension
[Check File Exists in Java]: https://www.journaldev.com/912/java-check-if-file-exists
[How to check if File is Directory]: https://www.journaldev.com/909/check-file-directory-file-java
[File Last Modified Date in Java]: https://www.journaldev.com/915/get-file-last-modified-date-time-java
[Java FileNameFilter Example]: https://www.journaldev.com/845/java-filenamefilter-example
[Java File Path_ Absolute Path and Canonical Path Explained]: https://www.journaldev.com/848/java-file-path-absolute-canonical
[Java File Permissions]: https://www.journaldev.com/858/java-file-permissions
[How to set File Permissions in Java Easily using Java 7 PosixFilePermission]: https://www.journaldev.com/855/java-set-file-permissions-posixfilepermission
[Copy File in Java]: https://www.journaldev.com/861/java-copy-file
[Open File in Java]: https://www.journaldev.com/864/java-open-file
[Read File in Java]: https://www.journaldev.com/867/java-read-text-file
[Java File Scanner Example]: https://www.journaldev.com/872/scanner-class-in-java
[Read a File to String in Java]: https://www.journaldev.com/875/java-read-file-to-string
[Java read file line by line]: https://www.journaldev.com/709/java-read-file-line-by-line
[Write a File in Java]: https://www.journaldev.com/878/java-write-to-file
[Append Text to File in Java]: https://www.journaldev.com/881/java-append-to-file
[Java InputStream to File Example]: https://www.journaldev.com/918/java-inputstream-to-file-example
[Java Random Access File]: https://www.journaldev.com/921/java-randomaccessfile-example
[Download File from URL]: https://www.journaldev.com/924/java-download-file-url
[How to write Object to File in Java]: https://www.journaldev.com/927/objectoutputstream-java-write-object-file
[How to read Object from File in Java]: https://www.journaldev.com/933/objectinputstream-java-read-object-file
[How to Compile and Run a Java Program in another Java program]: https://www.journaldev.com/937/compile-run-java-program-another-java-program
[Java Property File and Property XML]: https://www.journaldev.com/712/java-properties-file-java-util-properties
[Compress File or Directory using Java ZIP]: https://www.journaldev.com/957/java-zip-file-folder-example
[Java Unzip File Example]: https://www.journaldev.com/960/java-unzip-file-example
[Java GZIP Example]: https://www.journaldev.com/966/java-gzip-example-compress-decompress-file
[Java Temp File]: https://www.journaldev.com/971/java-temp-file
[https_www.journaldev.com_942_java-io-tutorial]: https://www.journaldev.com/942/java-io-tutorial