关于文件操作的两个问题，求解答！
1.查数据库表中的一个时间字段，转换成201206这种日期格式，然后以201206这字段命名创建文件夹。我在网上找了很久没有找到。
2.怎么样用程序编辑“.txt”文件，追加内容。请有例子的朋友贴出来个。
菜鸟求助感谢！

------解决方案--------------------
import java.io.*;
public class TestFile2
{
public static void main(String[] args) throws IOException
{
FileReader fr = new FileReader("ming.txt");
char[] buffer = new char[1024];
int ch = 0;
while((ch = fr.read())!=-1 )
{
System.out.print((char)ch);
}
　　InputStreamReader isr = new InputStreamReader(new FileInputStream("ming.txt"));
while((ch = isr.read())!=-1)
{
System.out.print((char)ch);
}
　　BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("ming.txt")));
String data = null;
while((data = br.readLine())!=null)
{
System.out.println(data);
}
　　FileWriter fw = new FileWriter("hello.txt");
String s = "hello world";
fw.write(s,0,s.length());
fw.flush();
　　OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream("hello2.txt"));
osw.write(s,0,s.length());
osw.flush();
　　PrintWriter pw = new PrintWriter(new OutputStreamWriter(new FileOutputStream("hello3.txt")),true);
pw.println(s);
　　fr.close();
isr.close();
br.close();
fw.close();
osw.close();
pw.close();
}
}
网上好多，关于文件读写的
------解决方案--------------------
1.把txt文件用FileReader读进程序
2.加上
3.用FileWriter写出去
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Java code

File fileDir = new File(fileDirName);
boolean makeDir = fileDir.mkdir();// 创建文件夹

------解决方案--------------------
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