从文本文件中删除单词

Question

我有一种方法可以从文本文件中以单词列表格式删除单词，但是它会不断删除文件中的所有数据，而不是特定单词

 public static void Option2Method() throws IOException 
 {
   File inputFile = new File("wordlist.txt");
   File tempFile = new File("TempWordlist.txt");

   BufferedReader reader = new BufferedReader(new FileReader(inputFile));
   BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));

   String lineToRemove = JOptionPane.showInputDialog(null, "Enter a word to remove");
   String currentLine;

   while((currentLine = reader.readLine()) != null)
 {
   String trimmedLine = currentLine.trim();
   if(trimmedLine.equals(lineToRemove)) continue;
   writer.write(currentLine);
 }
   boolean successful = tempFile.renameTo(inputFile);
 }

Answer 1

代码必须在编写器上调用close() 。

确保数据从缓冲区到达实际文件：

 while((currentLine = reader.readLine()) != null)
 {
   String trimmedLine = currentLine.trim();
   if(trimmedLine.equals(lineToRemove)) continue;
   writer.write(currentLine);
 }

 writer.close();
 reader.close();

考虑使用try / catch / finally块，以确保即使抛出IOException也关闭了流。

Answer 2

尝试这个：

String str = "Sample Line";
String[] words = str.split(" "); 
for(i=0 to i>arr.length)
{
if(str.indexOf(arr[i])!=-1) //checks if the word is present...
str.replace(arr[i],""); //replace the stop word with a blank
space..
}

或者这样：

String yourwordline = "dgfhgdfdsgfl Sample dfhdkfl"; 
yourwordline.replaceAll("Sample",""); 

Answer 3

尝试这个：

public static void removeLineMethod(String lineToRemove) throws IOException {
   File inputFile = new File("wordlist.txt");
   File tempFile = new File("TempWordlist.txt");

   BufferedReader reader = new BufferedReader(new FileReader(inputFile));
   BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));
   String currentLine;

   while((currentLine = reader.readLine()) != null)
 {
   String trimmedLine = currentLine.trim();
   if(trimmedLine.equals(lineToRemove)) continue;
   writer.write(currentLine + "\n");
 }
   reader.close();
   writer.close();
   inputFile.delete();
   tempFile.renameTo(inputFile);
 }

如果不删除输入文件，则重命名将失败，因此请关闭流，删除输入文件，然后重命名临时文件。

Answer 4

File inputFile = new File("wordlist.txt");
       File tempFile = new File("TempWordlist.txt");

   BufferedReader reader = new BufferedReader(new FileReader(inputFile));
   BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));

   String lineToRemove = JOptionPane.showInputDialog(null, "Enter a word to remove");
   String currentLine;

 while((currentLine = reader.readLine()) != null)
 {
   String trimmedLine = currentLine.trim();
   if(trimmedLine.equals(lineToRemove)) continue;
   writer.write(currentLine);
   writer.newLine();
 }
   reader.close();
   writer.close();
   inputFile.delete();
   tempFile.renameTo(inputFile);
    }