Java 在指定的路径下创建文件并写入读取

最新推荐文章于 2024-12-31 09:00:36 发布

最新推荐文章于 2024-12-31 09:00:36 发布 · 306 阅读

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import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class TestFile {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String path = "D:\\test\\userfile\\db.txt";
		
		File file = new File(path);
		if(!file.getParentFile().exists()){
			file.mkdir();
		}
		try {
			FileWriter fw = new FileWriter(file);
			BufferedWriter bw = new BufferedWriter(fw);
			for(int i=0;i<1000;i++)
			{
				bw.write(String.valueOf(i));
				bw.newLine();
			}
			bw.flush();
			bw.close();
			fw.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		try {
			FileReader fr = new FileReader(file);
			BufferedReader br = new BufferedReader(fr);
			String str =  "";
			do{
				str = br.readLine();
				System.out.println(str==null?"":str);
			}while(str!=null);
			br.close();
			fr.close();
			
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}