Java 如何读取文本文件的相对路径
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/19874066/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
how to read text file relative path
提问by user2945412
I have read sources here & there, but did not get the following code working. Basically, I wish to read a text file, named 'Administrator' from the folder 'src'. I will need a relative path, since this project may be transferred to another person. Please be patient with me.
我在这里和那里阅读了源代码，但没有使以下代码正常工作。基本上，我希望从文件夹“src”中读取一个名为“Administrator”的文本文件。我需要一个相对路径，因为这个项目可能会转移给另一个人。请对我有耐心。
public void staffExists () throws IOException
{
//http://stackoverflow.com/questions/2788080/reading-a-text-file-in-java
BufferedReader reader = new BufferedReader(new FileReader(getClass().getResourceAsStream ("/DBTextFiles/Administrator.txt")));
try
{
String line = null;
while ((line = reader.readLine()) != null)
{
if (!(line.startsWith("*")))
{
System.out.println(line);
}
}
}
catch (IOException ex)
{
ex.printStackTrace();
}
finally
{
reader.close();
}
}
采纳答案by willy
This is a valid absolute path (on the systems I'm aware of):
这是一个有效的绝对路径（在我知道的系统上）：
/path/to/directory/../../otherfolder/etc/
So what the other answerwas saying, was to get the path to the current directory with:
所以另一个答案是说，是获取当前目录的路径：
String filePath = new File("").getAbsolutePath();
Then concatenate your relative path with:
然后将您的相对路径与：
filePath.concat("path to the property file");
回答by Robin Green
This is not correct:
这是不正确的：
new FileReader(getClass().getResourceAsStream ("/DBTextFiles/Administrator.txt"))
You want:
你要：
new InputStreamReader(getClass().getResourceAsStream ("/DBTextFiles/Administrator.txt"))
回答by Kas
In almost all cases you should use the portable forward slash "/"."In every case you should use either the File constructor that accepts a File (parent) & String (file name) or use System.getProperty("file.separator").
在几乎所有情况下，您都应该使用可移植的正斜杠"/"."在每种情况下，您都应该使用接受 File（父）和 String（文件名）的 File 构造函数或使用System.getProperty("file.separator").
回答by user2945412
Now I get it, somewhat answers here & there do help in getting me to the goal. Did a short edit to my code & it worked. Hope it'll also help some poor souls out there.
现在我明白了，这里和那里的一些答案确实有助于让我达到目标。对我的代码进行了简短的编辑并且它起作用了。希望它也能帮助一些可怜的灵魂。
String filePath = new File("").getAbsolutePath();
System.out.println (filePath);
//http://stackoverflow.com/questions/2788080/reading-a-text-file-in-java
//http://stackoverflow.com/questions/19874066/how-to-read-text-file-relative-path
BufferedReader reader = new BufferedReader(new FileReader(filePath + "/src/DBTextFiles/Administrator.txt"));
try
{
String line = null;
while ((line = reader.readLine()) != null)
{
if (!(line.startsWith("*")))
{
System.out.println(line);
}
}
}
catch (IOException ex)
{
ex.printStackTrace();
}
finally
{
reader.close();
}
