jave类命名

Java Rename file or move file is a common IO operation. We can use File.renameTo(File dest) method for java rename file and java move file operations.

Java重命名文件或移动文件是常见的IO操作。 我们可以对Java重命名文件和Java移动文件操作使用File.renameTo(File dest)方法。

Java重命名文件 (Java Rename File)

File renameTo method returns true if file rename is successful, else it returns false.

如果文件重命名成功，则文件renameTo方法返回true，否则返回false。

Some of the rename operation behaviors are platform dependent. For example, it might fail if you move a file from one filesystem to another or if a file already exists with the same name at the destination directory.

一些重命名操作行为取决于平台。 例如，如果将文件从一个文件系统移动到另一个文件系统，或者目标目录中已经存在相同名称的文件，则可能会失败。

In Mac OS, if the destination file already exists renameTo() override the existing file with the source file.

在Mac OS中，如果目标文件已经存在，则renameTo()会用源文件覆盖现有文件。

Java移动文件 (Java Move File)

Moving a file is achieved by the renameTo() function itself. Moving a file doesn’t change file contents, just its directory location. A file complete path contains directory information with the file name, renameTo method is able to change the directory path too, hence move the file.

移动文件是通过renameTo（）函数本身实现的。 移动文件不会更改文件内容，只会更改其目录位置。 文件完整路径包含带有文件名的目录信息，renameTo方法也可以更改目录路径，从而移动文件。

Java重命名文件示例 (Java Rename File Example)

Here is the example program showing different ways for java rename file or java move file.

这是示例程序，显示了Java重命名文件或Java移动文件的不同方式。

RenameFileJava.java

RenameFileJava.java

package com.journaldev.files;import java.io.File;public class RenameFileJava {/*** Rename File  or Move File in Java example* @param args*/public static void main(String[] args) {//absolute path rename fileFile file = new File("/Users/pankaj/java.txt");File newFile = new File("/Users/pankaj/java1.txt");if(file.renameTo(newFile)){System.out.println("File rename success");;}else{System.out.println("File rename failed");}//relative path rename filefile = new File("DB.properties");newFile = new File("DB_New.properties");if(file.renameTo(newFile)){System.out.println("File rename success");;}else{System.out.println("File rename failed");}//java move file from one directory to anotherfile = new File("/Users/pankaj/DB.properties");newFile = new File("DB_Move.properties");if(file.renameTo(newFile)){System.out.println("File move success");;}else{System.out.println("File move failed");}//when source file is not presentfile = new File("/Users/pankaj/xyz.txt");newFile = new File("xyz.properties");if(file.renameTo(newFile)){System.out.println("File move success");;}else{System.out.println("File move failed");}// when destination already have a file with same namefile = new File("/Users/pankaj/export.sql");newFile = new File("/Users/pankaj/java1.txt");if(file.renameTo(newFile)){System.out.println("File move success");;}else{System.out.println("File move failed");}}}

We should always check the renameTo return value to make sure rename file is successful because it’s platform dependent and it doesn’t throw IO exception if rename fails. That’s all for a quick java rename file and move file example.

我们应该始终检查renameTo返回值，以确保重命名文件成功，因为重命名文件是平台相关的，并且如果重命名失败，它不会引发IO异常。 这就是快速Java重命名文件和移动文件示例的全部内容。

Reference: API Doc

参考： API文档

翻译自: https://www.journaldev.com/836/java-rename-file-jave-move-file

jave类命名