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1、字符流的出现为了方便操作字符
2、更重要的是加入了编码转换
3、通过子类转换流来完成
InputStreamReader
OutputStreamWriter
4、在两个对象进行构造的时候可以加入字符集
常见的编码表
ASCII,ISO8859-1,GB2312,GBK,Unicode,UTF-8
class EncodeStream
{
public static void writeText()throws IOException
{
OutputStreamWriter sow=new OutputStreamWriter(new FileOutputStream("gbk.txt","GBK"));
osw.write("你好");
osw.close();
}
public static void readText()throws IOException
{
InputStreamReader isr=new InputStreamReader(new FileOutputStream("gbk.txt"),"GBK");
char[] buf=new char[10];
in len=isr.read(buf);
String str=new String(buf,0,len);
sop(str);
isr.close();
}
public static void sop(Object obj)
{
System.out.println(obj);
}
public static void main(String[] args)
{
System.out.println("Hello World!");
}
}
编码:字符串编程字节数组
解码:字节数组编程字符串
String——>byte[]; str.getBytes(charsetName)
byte[]——>String; new String(byte[],charsetName)
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