实训——IO流

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
public class filedemo{
public static void main(String[] args) throws IOException{
String str = "12345abcdef@#&*软件工程";
File file = new File("data.txt");
FileWriter fw = new FileWriter(file);
BufferedWriter bw = new BufferedWriter(fw);
bw.write("12345abcdef@#&*软件工程");
bw.newLine(); 
bw.write("请多指教。");
bw.close(); 
fw.close(); 
}
}

import java.io.BufferedReader;

import java.io.File;
import java.io.FileReader;
import java.io.IOException;
public class readfile {
public static void main(String[] args) throws IOException
{
File file=new File("data.txt");
FileReader fr = new FileReader(file);
BufferedReader br=new BufferedReader(fr);
String str;
while ((str = br.readLine()) != null) 
{
System.out.println(str);
}
System.out.println("绝对路径：" + file.getAbsolutePath());
br.close(); 
fr.close(); 
}
}