fileoutputstream向本地文件写内容(2015年9月17日)

import java.io.FileOutputStream;
import java.io.IOException;
public class inputstreamreadtest {
	public static  void main(String[] args) {
		FileOutputStream fos = null;
		try {
			fos = new FileOutputStream("c:/baby.txt");
			byte[] b = new byte[4];
			b[0] = 'a';
			b[1] = 'b';
			b[2] = 'c';
			fos.write(b);
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				fos.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
}

上述写中文会乱码。

从一个文件复制内容到另外文件:

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class inputstreamreadtest {
	public static void main(String[] args) throws Exception {
		
		BufferedReader br = new BufferedReader(new InputStreamReader(
				new FileInputStream("c:/baby.xml"), "GB2312"));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(
				new FileOutputStream("c:/baby.txt"), "GB2312"));
		String data = null;
		while ((data = br.readLine()) != null) {
			System.out.println(data);         
			System.out.println(new String(data.getBytes("GBK")));
			bw.write(data);
			bw.newLine();
		}
		br.close();
		bw.close();
	}
}

不会出现乱码现象