目录
- InputStreamReader/OutputStreamWriter转换流(extends Reader/Writer)
--9.1 InputStreamReader
--9.2 OutputStreamWriter
--9.3 使用OutputStreamWriter和InputStreamReader拷贝文件
9.InputStreamReader/OutputStreamWriter转换流(extends Reader)
将字节流转换成字符流
转换流，用指定码表进行读取/写出
9.1 InputStreamReader
- InputStreamReader构造函数
public InputStreamReader(InputStream in)
public InputStreamReader(InputStream in, String charsetName) //charsetName码表名
- InputStreamReader重要方法
public int read() throws IOException
public int read(char cbuf[], int offset, int length)
9.2 OutputStreamWriter
1.OutputStreamWriter构造函数
public OutputStreamWriter(OutputStream out, String charsetName) //charsetName码表名
public OutputStreamWriter(OutputStream out)
2.OutputStreamWriter重要方法
public void write(int c)
public void write(char cbuf[], int off, int len)
public void write(String str, int off, int len)
public void flush()
9.3 使用OutputStreamWriter和InputStreamReader拷贝文件
File dir = Environment.getExternalStorageDirectory();
File file = new File(dir, "abc.txt");
File dst = new File(dir, "dst4.txt");
FileInputStream fis = new FileInputStream(file);
InputStreamReader isr = new InputStreamReader(fis);
BufferedReader br = new BufferedReader(isr);
FileOutputStream fos = new FileOutputStream(dst);
OutputStreamWriter osw = new OutputStreamWriter(fos);
BufferedWriter bw = new BufferedWriter(osw);
String line = null;
while ((line = br.readLine()) != null) {
bw.write(line);
bw.newLine();
bw.flush();
}
bw.close();
osw.close();
fos.close();
br.close();
isr.close();
fis.close();
