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This article mainly explains "java several common methods to obtain file paths", the explanation content in the article is simple and clear, easy to learn and understand, please follow the small series of ideas slowly in-depth, together to study and learn "java several common methods to obtain file paths" bar!

There are several common ways to get file paths in Java. Here are some examples of how to use them and how they work.

The directory structure of test items is shown in the right figure:

1. Use the File class

File file = new File("");// Java projects-->D:\WorkSoftware\Workspace\Eclipse Projects\MyWorkspace\test// Web projects-->D:\WorkSoftware\Server\apache-tomcat-7.0.96\binSystem.out.println(file.getAbsolutePath());File file = new File("/");/ Java projects--> D: \/ Web projects-->D:\System.out.println(file.getAbsolutePath());

2. Use of environmental variables

String path = System.getProperty("user.dir");// Java projects-->D:\WorkSoftware\Workspace\Eclipse Projects\MyWorkspace\test/Web projects-->D:\WorkSoftware\Server\apache-tomcat-7.0.96\binSystem.out.println(path);

3. Use the class loader

String path = MyTest.class.getResource("").getPath();// Java project-->D:/WorkSoftware/Workspace/Eclipse Projects/MyWorkspace/test/target/classes/com/luther/test//// Web project-->D: The requested URL/webapps/test/WEB-INF/classes/com/luther/test/System.out.println(path) was not found on this server. String path = MyTest.class.getResource("/").getPath();// Java project-->D:/WorkSoftware/Workspace/Eclipse Projects/MyWorkspace/test/target/classes//// Web project-->D: The requested URL/webapps/test/WEB-INF/classes/System.out.println(path) was not found on this server. String path = MyTest.class.getClassLoader().getResource("").getPath();// Java project-->D:/WorkSoftware/Workspace/Eclipse Projects/MyWorkspace/test/target/classes//// Web project-->D:/WorkSoftware/Server/apache-tomcat-7.0.96/webapps/test/WEB-INF/classes/System.out.println(path);

summary

In Java and Web environments, it is best to use class loading to find files, which is better.

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