转换流——OutputStreamWriter类与InputStreamReader类

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字节流和字符流的转换类

OutputStreamWriter ：是Writer的子类，将输出的 字符流 变成 字节流

InputStreamReader ：是Reader的子类，将输入的 字节流 变成 字符流

将字节输出流变成字符输出流

//=================================================

// File Name       :	OutputStreamWriter_demo

//------------------------------------------------------------------------------

// Author          :	Common

import java.io.File;

import java.io.FileOutputStream;

import java.io.OutputStreamWriter;

import java.io.Writer;

//主类

//Function        : 	从文件中读取内容

public class OutputStreamWriter_demo {

	public static void main(String[] args) throws Exception {

		// TODO 自动生成的方法存根

		File f = new File("/home/common/software/coding/HelloWord/HelloWord/test.txt");//路径

		Writer out = null;

		out = new OutputStreamWriter(new FileOutputStream(f));	//字节流变成字符流

		out.write("HelloWord");

		out.close();

	}

}

将字节输出流变成字符输出流

//=================================================

// File Name       :	InputStreamReader_demo

//------------------------------------------------------------------------------

// Author          :	Common

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.io.Reader;

import java.io.Writer;

//主类

//Function        : 	从文件中读取内容

public class InputStreamReader_demo {

	public static void main(String[] args) throws Exception {

		// TODO 自动生成的方法存根

		File f = new File("/home/common/software/coding/HelloWord/HelloWord/test.txt");//路径

		Reader reader = null;

		reader = new InputStreamReader(new FileInputStream(f));	//字节流变成字符流

		char c[] = new char[1024];

		int len = reader.read(c);

		reader.close();

		System.out.println(new String(c,0,len));

	}

}