Java技能树-IO-InputStreamReader/OutputStreamWriter

1 需求

2 接口

Class InputStreamReader

java.lang.Object 
        java.io.Reader 
                java.io.InputStreamReader 

• Constructor Detail
  • public InputStreamReader(InputStream in)
  • public InputStreamReader(InputStream in, String charsetName) throws UnsupportedEncodingException
  • public InputStreamReader(InputStream in, Charset cs)
  • public InputStreamReader(InputStream in, CharsetDecoder dec)
• Method Detail
  • public String getEncoding()
  • public int read() throws IOException
  • public int read(char[] cbuf, int offset, int length) throws IOException
  • public boolean ready() throws IOException
  • public void close() throws IOException

Class OutputStreamWriter

java.lang.Object 
        java.io.Writer 
                java.io.OutputStreamWriter 

• Constructor Detail
  • public OutputStreamWriter(OutputStream out, String charsetName) throws UnsupportedEncodingException
  • public OutputStreamWriter(OutputStream out)
  • public OutputStreamWriter(OutputStream out, Charset cs)
  • public OutputStreamWriter(OutputStream out, CharsetEncoder enc)
• Method Detail
  • public String getEncoding()
  • public void write(int c) throws IOException
  • public void write(char[] cbuf, int off, int len) throws IOException
  • public void write(String str, int off, int len) throws IOException
  • public void flush() throws IOException
  • public void close() throws IOException

3 示例代码

示例代码：判断cmd命令行编码格式：GBK

import java.io.IOException;
import java.io.InputStreamReader;

public class Test {
    public static void main(String[] args) throws IOException {
        InputStreamReader reader = new InputStreamReader(Runtime.getRuntime().exec("cmd /c dir").getInputStream());
        System.out.println(reader.getEncoding());
    }
}

4 参考资料