📅  最后修改于: 2020-11-15 03:42:25             🧑  作者: Mango
Reader和Writer类是面向字符的流类。这些可以用来读取和转换Unicode字符。
下面的示例将展示使用Reader和Writer类将Unicode字符串转换为UTF8字节[],并将UTF8字节[]转换为Unicode字节[]。
IOTester.java
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import java.nio.charset.Charset;
import java.text.ParseException;
public class I18NTester {
public static void main(String[] args) throws ParseException, IOException {
String input = "This is a sample text" ;
InputStream inputStream = new ByteArrayInputStream(input.getBytes());
//get the UTF-8 data
Reader reader = new InputStreamReader(inputStream, Charset.forName("UTF-8"));
//convert UTF-8 to Unicode
int data = reader.read();
while(data != -1){
char theChar = (char) data;
System.out.print(theChar);
data = reader.read();
}
reader.close();
System.out.println();
//Convert Unicode to UTF-8 Bytes
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
Writer writer = new OutputStreamWriter(outputStream, Charset.forName("UTF-8"));
writer.write(input);
writer.close();
String out = new String(outputStream.toByteArray());
System.out.println(out);
}
}
它将打印以下结果。
This is a sample text
This is a sample text