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IO转换流

news 来源：原创 2024/6/30 23:23:23

InputStreamReader/OutputStreamWriter用来实现将字节流转化成字符流。

通过转换流解决乱码

public class TestInputStreamReader {public static void main(String[] args){//创建文件字节流输入流对象try(FileInputStream fis = new FileInputStream("d:/a.txt");//创建转换流（字节到字符的转换）流对象，并在流对象中指定编码InputStreamReader isr = new InputStreamReader(fis,"gbk")){StringBuilder sb = new StringBuilder();//操作流对象int temp = 0;while((temp = isr.read()) != -1){sb.append((char)temp);}   System.out.println();}catch(IOException e){e.printStackTrace();}}
}

通过转换流实现键盘输入屏幕输出

import java.io.*;public class TestConvertStream {public static void main(String[] args){//创建字符输入和输出流：使用转换流将字节流转换成字符流BufferedReader br = null;BufferedWriter bw = null;try{br = new BufferedReader(new InputStreamReader(System.in));bw = new BufferedWriter(new OutputStreamWriter(System.out));//使用字符输入和输出流String str = br.readLine();//一直读取，直到用户输入了exit为止while(!"exit".equals(str)){//写到控制台bw.write(str);bw.newLine();  //写一行后换行bw.flush();  //手动刷新//再读一行str = br.readLine();}}catch(IOException e){e.printStackTrace()}finally{//关闭字符输入和输出流if(br != null){try{br.close();}catch(IOException e){e.printStackTrace();}}if(bw != null){try{bw.close();}catch(IOException e){e.printStackTrace();}}}}
}