缓冲区字符流，写入内容到根目录下的hello.txt文件

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;

/**
缓冲区字符流，写入内容到根目录下的hello.txt文件
*/
public class BufferWriterDemo {
public static void main(String[] args) {

try {
BufferedWriter bw=new BufferedWriter(new FileWriter("hello.txt"));
//String str="你好\r\n你好！";
String str="abcde";
for(int i=1;i<=20;i++) {

bw.write(str+"\t");

if(i%5==0) {
//换行.....
bw.newLine();
}
}
bw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/*
运行的在hello.txt中得：

abcde	abcde	abcde	abcde	abcde
abcde	abcde	abcde	abcde	abcde
abcde	abcde	abcde	abcde	abcde
abcde	abcde	abcde	abcde	abcde

*/