Java IO流->處理流->轉換流：InputStreamReader&OutputStreamWriter

圖一：

示例代碼：

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;

import org.junit.Test;

public class TestOtherStream {
	/**
	 * 如何實現 字節流 與 字符流 之間的轉換？
	 * 轉換流：InputStreamReader	OutputStreamWriter
	 * 解碼：字節數組	->	字符串
	 * 編碼：字符串	->	字節數組
	 */
	@Test
	public void test1() {
		BufferedReader br = null;
		BufferedWriter bw = null;
		try {
			//解碼
			File file1 = new File("testOtherStream.txt");
			FileInputStream fis = new FileInputStream(file1);
			InputStreamReader isr = new InputStreamReader(fis, "GBK");
			br = new BufferedReader(isr);
			
			//編碼
			File file2 = new File("testOtherStream2.txt");
			FileOutputStream fos = new FileOutputStream(file2);
			OutputStreamWriter osw = new OutputStreamWriter(fos, "GBK");
			bw = new BufferedWriter(osw);
			
			String str;
			while((str = br.readLine()) != null) {
				bw.write(str);
				bw.newLine();
				bw.flush();
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (bw != null) {
				try {
					bw.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			if(br != null) {
				try {
					br.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		
	}
}