Java FileReader 找不到我的文本文件
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The FileReader cannot find my text file
提问by user2843235
I have a simple text file and for some reason, it cannot be found. I don't see anything wrong with the code because I got it from a site, and I am starting to think that I didn't place the text file in the right place. Any suggestion please?
我有一个简单的文本文件，由于某种原因，找不到它。我没有发现代码有任何问题，因为我是从一个站点获取的，而且我开始认为我没有将文本文件放在正确的位置。请问有什么建议吗？
Code:
代码：
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.nio.file.Path;
import java.nio.file.Paths;
public class MainFavorites {
public static void main(String[] args) throws IOException {
/**
* finds pathway to the file
*/
// File file = new File("icecreamTopping.txt");
// System.out.println(file.getCanonicalPath());
BufferedReader reader = null;
ArrayList <String> myFileLines = new ArrayList <String>();
try {
String sCurrentLine;
reader = new BufferedReader(new FileReader("icecreamTopping.txt"));
while ((sCurrentLine = reader.readLine()) != null) {
//System.out.println(sCurrentLine);
myFileLines.add(sCurrentLine);
}
} catch (IOException e) {
e.printStackTrace();
System.out.print(e.getMessage());
} finally {
try {
if (reader != null)reader.close();
} catch (IOException ex) {
System.out.println(ex.getMessage());
ex.printStackTrace();
}
}
int numElements = myFileLines.size();
System.out.println ("there are n lines in the file:" + numElements);
for (int counter = numElements-1; counter >= 0; counter--) {
String mylineout = myFileLines.get(counter);
System.out.println (mylineout);
}
}
}
File content:
文件内容：
1- Blueberry
2- Banana Buzz
3- Cookie Batter
My stack trace is this:
我的堆栈跟踪是这样的：
java.io.FileNotFoundException: C:\Users\homar_000\workspace\RankFavorites\icecreamTopping.txt (The system cannot find the file specified)
at java.io.FileInputStream.open(Native Method) at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileReader.<init>(Unknown Source)
at MainFavorites.main(MainFavorites.java:28)
采纳答案by user2843235
Found out what was the problem. It was unnecessary for me to put the file extension so I removed the .txt because when I kept it, it read it as "icecreamTopping.txt.txt"
找出问题所在。我没有必要放置文件扩展名，所以我删除了 .txt，因为当我保留它时，它读作“icecreamTopping.txt.txt”
回答by Braj
Replace below line
替换下面的行
reader = new BufferedReader(new FileReader("icecreamTopping.txt"));
with
和
reader = new BufferedReader(new FileReader("resources/icecreamTopping.txt"));
and put the file under resources folder that resides parallel to src folder.
并将文件放在与 src 文件夹平行的资源文件夹下。
Sample code:
示例代码：
Reading a file abc.txtfrom resources folder
abc.txt从资源文件夹中读取文件
reader = new BufferedReader(new FileReader("resources/abc.txt"));
Here is the project structure
这是项目结构
Try below code to find out where it is pointing to file icecreamTopping.txt.
尝试下面的代码以找出它指向 file 的位置icecreamTopping.txt。
File f=new File("icecreamTopping.txt");
System.out.println(f.getAbsolutePath());
After getting the absolute path, just place the file there.
获得绝对路径后，只需将文件放在那里。
--EDIT--
- 编辑 -
As per your last comments, put icecreamTopping.txtfile in the project RankFavoritesdirectly as shown in below snapshot and It will definitely solve your problem.
根据您最后的评论，将icecreamTopping.txt文件RankFavorites直接放入项目中，如下面的快照所示，它肯定会解决您的问题。
回答by Govtart
Try to use File class to detect your file in storage:
尝试使用 File 类来检测存储中的文件：
File sdcard = Environment.getExternalStorageDirectory();
//Get the text file
File file = new File(sdcard,"file.txt");
BufferedReader br = new BufferedReader(new FileReader(file));
