java IO File按行读写追加

Posted 2023-02-13 老李笔记

java IO File按行读写追加

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class FileUtil2 

	public static void main(String[] args) 
		FileUtil2.write("d://wwwc", "ooooooooooooooo");
		FileUtil2.read("d://wwwc");
	

	public static void read(String path) 
		try (FileInputStream inputStream = new FileInputStream(path);
				BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));) 
			String line = null;
			while ((line = bufferedReader.readLine()) != null) 
				System.out.println(line);
			
		 catch (Exception e) 
			e.printStackTrace();
		
	

	// 以追加的方式将文本输出到本地文件中
	public static void write(String path, String content) 
		File file = new File(path);
		if (!file.exists()) 
			try 
				file.createNewFile();
			 catch (Exception e) 
				File parentFile = file.getParentFile();
				parentFile.mkdirs();
				try 
					file.createNewFile();
				 catch (Exception e2) 
					e2.printStackTrace();
				
			
		
		try (FileOutputStream fos = new FileOutputStream(file, true);
				OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");) 
			osw.write(content);
			osw.write("\\r\\n");
		 catch (Exception e) 
			e.printStackTrace();