import java.io.*;
public class FileIO {
public static void main(String[] args) {
//1.相对路径
File testFile1=new File("test1.txt");
//2.绝对路径
//错误:
//File testFile2=new File("E:\Java\test2.txt");
File testFile2=new File("E:/Java/test2.txt");
String s1;
StringBuffer sb1=new StringBuffer();
try {
BufferedReader reader =
new BufferedReader(new FileReader(testFile1));
s1 = reader.readLine();
while(s1!=null){
sb1.append(s1+"\n");
s1=reader.readLine();
}
System.out.println(sb1);
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedWriter writer =
new BufferedWriter(new FileWriter(testFile2));
writer.write(sb1.toString());
//错误
//忘记清空缓冲,关闭流
writer.flush();
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}