java 使用带有完整路径的 FileWriter
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Using the FileWriter with a full path
提问by chris yo
I specified the full path of the file location when I created a FileWriter, but I did not see the file being created. I also did not get any error during file creation.
我在创建 FileWriter 时指定了文件位置的完整路径，但是我没有看到正在创建的文件。我在文件创建过程中也没有收到任何错误。
Here's a snippet of my code:
这是我的代码片段：
public void writeToFile(String fullpath, String contents) {
File file = new File(fullpath, "contents.txt");
if (!file.exists()) {
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
BufferedWriter bw = new BufferedWriter(new FileWriter(file.getAbsoluteFile()));
bw.write(contents);
bw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
fullpath is "D:/codes/sources/logs/../../bin/logs".
I have searched my whole directory, but I cannot find the file anywhere.
If I specify just the filename only [File file = new File("contents.txt");] , it is able to save the contents of the file, but it is not placed on my preferred location.
全路径是"D:/codes/sources/logs/../../bin/logs". 我已经搜索了整个目录，但在任何地方都找不到该文件。如果我只指定文件名 [File file = new File("contents.txt");] ，它可以保存文件的内容，但它不会放在我喜欢的位置。
How can I save the file content to a preferred location?
如何将文件内容保存到首选位置？
UPDATE: I printed the full path using file.getAbsolutePath(), and I am getting the correct directory path. [D:\codes\sources\logs....\bin\logs\contents.txt] But when I look for the file in directory, I cannot find it there.
更新：我使用file.getAbsolutePath() 打印了完整路径，并且得到了正确的目录路径。[D:\codes\sources\logs....\bin\logs\contents.txt] 但是当我在目录中查找文件时，我在那里找不到它。
回答by Kevin Bowersox
Make sure you add trailing backslashes to the path parameter so the path is recognized as a directory. The example provide is for a Windows OS which uses backslashes that are escaped. For a more robust method use the file.separatorproperty for the system.
确保向路径参数添加尾部反斜杠，以便将路径识别为目录。提供的示例适用于使用转义反斜杠的 Windows 操作系统。对于更健壮的方法，请使用file.separator系统的属性。
Works
作品
writeToFile("D:\Documents and Settings\me\Desktop\Development\",
"this is a test");
Doesn't Work
不工作
writeToFile("D:\Documents and Settings\me\Desktop\Development",
"this is a test");
File Separator Example
文件分隔符示例
String fs = System.getProperty("file.separator");
String path = fs + "Documents and Settings" + fs + "me" + fs
+ "Desktop" + fs + "Development" + fs;
writeToFile(path, "this is a test");
