JavaStream

最新推荐文章于 2025-07-14 21:00:27 发布

原创最新推荐文章于 2025-07-14 21:00:27 发布 · 397 阅读

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流：

什么是流：流是一种有序的数据序列，可以进行数据的传送！

根据操作类型可分为：输入流和输出流两种I/O(Input/Output,输入/输出)

根据数据传送类型分为：字节流/字符流

根据功能不同可以分为：节点流和处理流

Java语言定义了许多类专门负责各种方式的输入和输出，这些类都被放在java.io包中。其中所有输入流类都是抽象类InputStream(字节输入流）或抽象类Reader(字符输入流）的子类；而所有输出流都是抽象类OutputStream(字节输出流）或抽象类Writer(字符输出流）的子类。

下面是我的举例：

InputStream:

</pre><pre name="code" class="java"><span style="font-size:18px;">package com.sxt.stream;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

/**
 * @author HZ
 * @category 字节输入流
 */
public class InputStreamDemoOne {

	public static void main(String[] args) {
		File file = new File("C:/new/mulu/a.txt");
		InputStream input = null;
		try {
			input = new FileInputStream(file);
			int i = 0;
			while((i=input.read())!=-1){
				System.out.print((char)i);
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				input.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		
	}

}
</span>

OutputStream:

package com.sxt.Stream;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * @author HZ
 * @category 字节输出流
 */
public class OutputStreamDemoOne {

	public static void main(String[] args) {
		File file = new File("C:" + File.separator + "new" 
						+ File.separator + "mulu" + File.separator + "b.txt");
		OutputStream output = null;
		try {
			output = new FileOutputStream(file);
			output.write(71);
			output.write(65);
			output.write(97);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				output.flush();
				output.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		
	}

}

Reader:

package com.sxt.stream;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;

/**
 * @author HZ
 * @category 字符输入流
 */
public class ReaderDemoOne extends SeparatorDemo {

	public static void main(String[] args) {
		File file = new File("C:" + File.separator + "new" + File.separator + "mulu" + File.separator + "b.txt");
		Reader reader = null;
		try {
			reader = new FileReader(file);
			int i;
			while((i=reader.read())!=-1){
//				i = reader.read();
				System.out.print((char)i);
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				reader.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		
		
	}

}

Writer:

package com.sxt.stream;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;

/**
 * @author HZ
 * @category 字符输出流
 */
public class WriterDemoOne {

	public static void main(String[] args) {
		File file = new File("C:" + File.separator + "new" 
				+ File.separator + "mulu" + File.separator + "c.txt");
		Writer writer = null;
		try {
			writer = new FileWriter(file);
			writer.write("再不奋斗就老了！！！！！！！！！");
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				writer.flush();
				writer.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		
	}

}