目录

• 通过乱码问题引出转换流
• InputStreamReader
• • 练习
• OutputStreamWriter
• • 练习

通过乱码问题引出转换流

import java.io.*;

public class CodeIssue {
    public static void main(String[] args) throws IOException {
        String fileName = "D:\\demo\\test\\code_issue.txt";
        BufferedReader bufferedReader = new BufferedReader(new FileReader(fileName));
        System.out.println(bufferedReader.readLine());
        bufferedReader.close();
    }
}

���ѽ

所以就引出了转换流。

InputStreamReader

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

public class InputStreamReader
extends Reader

练习

将字节流FileInputStream用gbk的编码格式包装成字符流InputStreamReader，接着再包装成BufferedReader。

import java.io.*;

public class BufferedReader_ {
    public static void main(String[] args) throws IOException {
        String fileName = "D:\\demo\\test\\code_issue.txt";
        String charset = "gbk";
        InputStreamReader inputStreamReader = new InputStreamReader(new FileInputStream(fileName), charset);
        BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
        System.out.println(bufferedReader.readLine());
        bufferedReader.close();
    }
}

你好呀

OutputStreamWriter

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

public class OutputStreamWriter
extends Writer

练习

将字节流FileOutputStream用utf8的编码格式包装成字符流OutputStreamWriter，对文件进行写入，按照gbk的格式。

import java.io.*;

public class OutputStreamWriter_ {
    public static void main(String[] args) throws IOException {
        String fileName = "D:\\demo\\test\\aa.txt";
        String charset = "utf8";
        OutputStreamWriter outputStreamWriter = new OutputStreamWriter(new FileOutputStream(fileName), charset);
        outputStreamWriter.write("你好，世界！");
        outputStreamWriter.close();
    }
}