转换流——OutputStreamWriter类与InputStreamReader类

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));
	}

}