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Closed 12 years ago.

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How to create a Java String from the contents of a file

Is it possible to process a multi-lined text file and return its contents as a string?

如果有可能,请向我说明情况。

如果你们需要更多的信息,我会与I/O玩.。我想开一个文本文件,处理其内容,把这个文件作为“努力”,并将案文内容定在其中。

请像文字编辑。

Answer 1

Check the java tutorial here - http://download.oracle.com/javase/tutorial/essential/io/file.html

Path file = ...;
InputStream in = null;
StringBuffer cBuf = new StringBuffer();
try {
    in = file.newInputStream();
    BufferedReader reader = new BufferedReader(new InputStreamReader(in));
    String line = null;

    while ((line = reader.readLine()) != null) {
        System.out.println(line);
        cBuf.append("
");
        cBuf.append(line);
    }
} catch (IOException x) {
    System.err.println(x);
} finally {
    if (in != null) in.close();
}
// cBuf.toString() will contain the entire file contents
return cBuf.toString();

Answer 2

http://commons.apache.org/io/api-1.4/org/apache/commons/io/FileUtils.html#readFileToString%28java.io rel=“nofollow”

Answer 3

大致如下:

String result = "";

try {
  fis = new FileInputStream(file);
  bis = new BufferedInputStream(fis);
  dis = new DataInputStream(bis);

  while (dis.available() != 0) {

    // Here s where you get the lines from your file

    result += dis.readLine() + "
";
  }

  fis.close();
  bis.close();
  dis.close();

} catch (FileNotFoundException e) {
  e.printStackTrace();
} catch (IOException e) {
  e.printStackTrace();
}

return result;

Answer 4

String data = "";
try {
    BufferedReader in = new BufferedReader(new FileReader(new File("some_file.txt")));
    StringBuilder string = new StringBuilder();
    for (String line = ""; line = in.readLine(); line != null)
        string.append(line).append("
");
    in.close();
    data = line.toString();
}
catch (IOException ioe) {
    System.err.println("Oops: " + ioe.getMessage());
}

见import java.io.*。

This will replace all newlines in the file with , because I don t think there is any way to get the separator used in the file.

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