读写txt/日志文件的java程序
我对编程非常陌生,而且我有基本的知识
我正在尝试制作一个程序:
- 读取已存在文件的路径
- 读取要从现有文件中提取的字符串李>
- 读取创建新文件的路径李>
- 从第3点创建具有指定路径的文件。其中包含从第2点选择的单词李>
例如,如果我有一个log/txt文件。我想从中提取我在第2点从键盘上读取的所有字符串
在此之后,我希望所有这些字符串都被写入一个新的log/txt文件
我希望你知道我想做什么
这是我到现在为止写的东西,但我有点陷入了想法中,因为我还在学习编码语法,所以很难实现它
package com.kwextractor;
import java.io.*;
import java.util.Scanner;
public class Main {
public static String inputFilePath;
public static String outputFilePath;
public static String textToGet;
public static void main(String[] args) throws IOException {
Scanner filePathIn = new Scanner(System.in);
Scanner inputText = new Scanner(System.in);
Scanner filePathOut = new Scanner(System.in);
System.out.println("Enter file path:");
inputFilePath = filePathIn.nextLine();
System.out.println("Enter the string you want to extract:");
textToGet = inputText.nextLine();
System.out.println("Enter the path of the exported file:");
outputFilePath = filePathOut.nextLine();
File inputFile = new File(inputFilePath +".txt");
BufferedReader inputReader = new BufferedReader(new FileReader(inputFile));
String nextLine;
while ((nextLine = inputReader.readLine()) != null)
{
if (nextLine.equals(textToGet)) {
BufferedWriter writer = null;
try {
File outputFile = new File(outputFilePath+".txt");
System.out.println(outputFile.getCanonicalPath());
writer = new BufferedWriter(new FileWriter(outputFile));
writer.write(textToGet);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
// Close the writer regardless of what happens...
writer.close();
} catch (Exception e) {
}
}
}
}
}
}
共 (0) 个答案