如何获取保存的文本文件的内容 (Java)

Question

有什么方法可以将文本文件的内容作为字符串获取吗？

例如我的文件内容为：

Name: John, Age: 34, Email: someone@example.com

我看到过类似的问题，但他们对我毫无帮助。

编辑：我的代码 -


        String fileName = "Sample" + ".txt";
        File file = new File(Environment.getExternalStoragePublicDirectory(
                Environment.DIRECTORY_DOCUMENTS) + File.separator + fileName);

        try {
            BufferedReader br = new BufferedReader(new FileReader(file));

            String currentLine;
            String content;
            StringBuilder stringBuilder = new StringBuilder();

            while ((currentLine = br.readLine()) != null) {
                stringBuilder.append(currentLine);
            }

            content = stringBuilder.toString();
            System.out.println(content);
        } catch (IOException e) {
            e.printStackTrace();
        }
    } 



// somewhere else in the code
final Button viewData = findViewById(R.id.viewData); // Defining the viewData button

viewData.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                viewFileData();
            }
        });

感谢您的帮助。

Answer 1

你可以试试这样想

public class Main {

    public static void main(String[] args) throws IOException {

        File file = new File("C:\Users\Hasindu\Desktop\javaSample\src\sample\sample.txt");//Text file location

        BufferedReader br = new BufferedReader(new FileReader(file));

        String currentLine;
        String content = null;
        StringBuilder stringBuilder = new StringBuilder();//Using the StringBuilder class of java for the concatenation.

        while ((currentLine = br.readLine()) != null) {
      
            stringBuilder.append(currentLine); //Read all the lines in the text file and concatenate them for a single stringBulder object.

        }
        content = stringBuilder.toString();//Coverting the StringBuilder object to a String
        System.out.println(content);


    }



}

如何获取保存的文本文件的内容 (Java)

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