io(字符流）

关于字节流乱码问题：OutputStreamWriter

 

package ioChar;

import org.junit.Test;

import javax.annotation.processing.Filer;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;

public class CharStream {
    //字符流
    @Test
    public void charS() throws Exception {
        //建立输出流
        FileWriter fileWriter = new FileWriter("h:\\java.txt");
        //写入数据
        fileWriter.write("this is ");
        //关闭连接
        fileWriter.close();

        //BufferedWriter
        //建立输出流
        FileWriter fileWriter1 = new FileWriter("h:\\java.txt");
        BufferedWriter bufferedWriter = new BufferedWriter(fileWriter1);
        //写数据
        bufferedWriter.write("thiidllda daadas kk");
        //关闭连接
        bufferedWriter.close();
        fileWriter.close();


        //FileReader
        //建立输入流
        FileReader fileReader = new FileReader("h:\\java.txt");
        //read data
//        while ( (fileReader.read())!=-1){
//            System.out.println((char)fileReader.read());
//        }

        //BufferedReader
        BufferedReader bufferedReader = new BufferedReader(fileReader);
        String line = null;
        while ((line = (bufferedReader.readLine())) != null) {
            System.out.println(line);//整行读取
        }
        bufferedReader.close();
        fileReader.close();
    }
}

package com.zrm.io;

import org.junit.Test;

import java.io.*;

public class ByteLuan {
    //处理字节流乱码问题
    @Test
    public void doLuanMa() throws IOException {
        //创建流
        FileOutputStream fio = new FileOutputStream("h:\\java.txt", true);
        OutputStreamWriter osw = new OutputStreamWriter(fio, "utf-8");
        //写数据
        osw.write("java is the best ");
        osw.write("中国是最强大的");
        //关闭流
        osw.close();
        fio.close();

        //读取数据
        //创建流
        FileInputStream fis = new FileInputStream("h:\\java.txt");
        InputStreamReader isr = new InputStreamReader(fis, "utf-8");
        //read
        char[] car = new char[1024];
        int len = 0;
        while ((len = isr.read(car)) != -1) {
            System.out.println(len);
        }
        //关闭流
        isr.close();
        fis.close();
    }
}