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java中的io流

作者:互联网

主要有两种方式区分:

1.以内存作为参照物按流向分:输入流和输出流

2.按照数据格式分:字节流(以Stream结尾)、字符流(以Reader/Writer结尾)

 

java.io包下的流,主要用的有以下几个:

文件专属:

FileInputStream:

 FileInputStream fis = new FileInputStream("C:\\Users\\lenovo\\Desktop\\work\\test.txt");

FileOutputStream:

  FileOutputStream fos = new FileOutputStream("C:\\Users\\lenovo\\Desktop\\work\\testcopy.txt");

FileRader:

 FileReader  fir = new FileReader("C:\\Users\\lenovo\\Desktop\\work\\test.txt");

FileWriter:

  FileWriter          fiw = new FileWriter("C:\\Users\\lenovo\\Desktop\\work\\testcopy.txt");

 

转换流:

InputStreamReader:

        BufferedReader buf = new BufferedReader(new InputStreamReader(new FileInputStream("C:\\Users\\lenovo\\Desktop\\work\\test.txt")));

OutputStreamReader:

 BufferedInputStream bis = new BufferedInputStream(new FileInputStream());

 

缓冲流专属:

BufferedReader;

BufferedWriter;

BufferedInputStream;

BufferedOutputSteam;

 

数据流专属:

DateInputSteam;

DateOutputSteam;

 

标准输出流:

PrintWriter;

PrintStream;

 

对象专属流:

ObjectInputStream;

ObjectOutputStream;

 

注意,流在使用完后均需要close,一般写在finally()方法中,输出流需要还需要flush

如果是包装流与节点流关系的话,将包装流关闭,后默认关闭节点流。

 

标签:lenovo,java,Users,Desktop,io,new,FileInputStream,txt
来源: https://www.cnblogs.com/xuhan74520/p/13899334.html