readfile.java

来自「java 教程相应的代码 全是自己写的内附注释 很容易看明白的」· Java 代码 · 共 46 行

package demo.chapter.file;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Scanner;

/**
 * 读取文件范例
 * @author Frank
 */
public class ReadFile {

	public static void main(String[] args) {
		System.out.println("请输入要读取的文件:");
		Scanner scan = new Scanner(System.in);
		System.out.println();
		
		File file = new File(scan.nextLine());

		try {
			BufferedReader in = 
				new BufferedReader(new FileReader(file));
			System.out.println("文件内容如下:");
			while (true) {
				String s = in.readLine();
				if (s != null)
					System.out.println(s);
				else
					break;
			}
			in.close();
		} catch (FileNotFoundException e1) {
			System.err.println("文件不存在:" + file);
		} catch (IOException e2) {
			e2.printStackTrace();
		}

	}

}