使用BufferedWriter，BufferedReader读写特定编码文件

对于一些大文件，如果处理不谨慎，JAVA很容易出现OutofMemary错误，这又是一个很大的题目，

一般讲，我们使用BufferedWriter，BufferedReader来处理，交给API读写，这样一定程度上可以避免这种错误。

但是，汉字，日文等等，特定编码的话，这个BufferedWriter，BufferedReader，初始化要么是流，要么是文件没法指定编码。

因为，支持流，所以其实曲线是可以的，贴代码。

InputStreamReader isw;
isw = new InputStreamReader(new FileInputStream("c:\\demo.txt"),
Charset.forName("UTF-8"));
bufReader = new BufferedReader(isw);

OutputStreamWriter osw;
osw = new OutputStreamWriter(new FileOutputStream("c:\\demo.txt"),
    Charset.forName("UTF-8"));
bufWriter = new BufferedWriter(osw);

全套读写代码

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.nio.charset.Charset;

public class DemoFileWriter {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println("HI1");
		try {
			writer();
			System.out.println("HI2");
			reader();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println("HI3");
	}

	public static void writer() throws IOException {

		BufferedWriter bufWriter = null;

		try {
			OutputStreamWriter osw;
			osw = new OutputStreamWriter(new FileOutputStream("c:\\demo.txt"),
					Charset.forName("UTF-8"));

			// FileOutputStream("c:\\demo.txt"),"UTF-8"));
			bufWriter = new BufferedWriter(osw);
			int intCount = 0;
			while (true) {
				intCount++;
				if (intCount > 1000)
					break;
				bufWriter.write("日本語テスト,日本語テスト,日本語テスト,日本語テスト,日本語テスト,日本語テスト");
				bufWriter.write("\r\n");
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} finally {
			if (bufWriter != null)
				bufWriter.close();
		}
	}

	public static void reader() throws IOException {

		BufferedReader bufReader = null;

		try {
			InputStreamReader isw;
			isw = new InputStreamReader(new FileInputStream("c:\\demo.txt"),
					Charset.forName("UTF-8"));
			bufReader = new BufferedReader(isw);

			String data;
			while ((data = bufReader.readLine()) != null) {
				System.out.println(data);

			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} finally {
			if (bufReader != null)
				bufReader.close();

		}
	}

}