topics: Java file getPath getAbsolutePath getCanonicalPath-优快云博客

本文通过实例详细解析了Java中使用File类进行文件I/O操作的过程，包括获取路径、绝对路径和规范化路径的方法，并通过不同目录路径的示例展示其应用。

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public static void testFileIO(){

/* output:
-----case 1------
getPath()=.\test1.txt
getAbsolutePath()=C:\Users\hongbin\workspace\IOtrial\.\test1.txt
getCanonicalPath()=C:\Users\hongbin\workspace\IOtrial\test1.txt
*/
File file1 = new File(".\\test1.txt");
out.println("-----case 1------");
out.println("getPath()="+file1.getPath());
out.println("getAbsolutePath()="+file1.getAbsolutePath());
try{
out.println("getCanonicalPath()="+file1.getCanonicalPath());
} catch(IOException e) {
e.printStackTrace();
}

/*output
----case 2------
getPath()=\workspace\test\test1.txt
getAbsolutePath()=C:\workspace\test\test1.txt
getCanonicalPath()=C:\workspace\test\test1.txt
*/
File file2 = new File("\\workspace\\test\\test1.txt");
out.println("----case 2------");
out.println("getPath()="+file2.getPath());
out.println("getAbsolutePath()="+file2.getAbsolutePath());
try{
out.println("getCanonicalPath()="+file2.getCanonicalPath());
} catch(IOException e) {
e.printStackTrace();
}
/* output
----case 3------
getPath()=D:\workspace\test\test1.txt
getAbsolutePath()=D:\workspace\test\test1.txt
getCanonicalPath()=D:\workspace\test\test1.txt
*/
File file3 = new File("D:\\workspace\\test\\test1.txt");
out.println("----case 3------");
out.println("getPath()="+file3.getPath());
out.println("getAbsolutePath()="+file3.getAbsolutePath());
try{
out.println("getCanonicalPath()="+file3.getCanonicalPath());
} catch(IOException e) {
e.printStackTrace();
}

return;

}