在Java中读取文件时获得相同的内容

Question

I have created a FileReader object.

public String getFileContent(){

   StringBuilder filecontent= new StringBuilder();

   FileReader fileReader =  new FileReader("D:/myfile");

   BufferedReader bufferedReader = new BufferedReader(fileReader);


   while((line = bufferedReader.readLine()) != null) {

      filecontent.append(bufferedReader.readLine());

   }    

   return filecontent.toString;
}

The problem I face is that the function always returns the same string even if the file content is changed.

Anyone to help???

Answer 1

append the variable line since you store it to that variable. The problem is you're calling the readline() twice

like this:

while((line = bufferedReader.readLine()) != null) { 
      filecontent.append(line); 
 }  

Answer 2

You received an answer already, but it seems that what you're doing could be achieved way better in Java 8:

Path filePath = Paths.get("D:/myfile");
byte[] fileBytes = Files.readAllBytes(filePath);
Charset fileEncoding = StandardCharsets.UTF_8;
String fileContents = new String(fileBytes, fileEncoding);

If you're not on Java 8, you can use Apache Commons IO's FileUtils to get the String :

File file = new File("D:/myfile");
String fileContents = FileUtils.readFileToString(file);

My advice here is leverage the JDK and existing libraries as much as possible. It leads to cleaner code that is easier to maintain.