处理流类型：

1、处理流之首先缓冲流：

解释：

例子：TestBufferStream1.java

package com.zhj.www;import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;public class TestBufferStream1 {public static void main(String[] args) {try {FileInputStream fileInputStream = new FileInputStream("E:\\JavaCode\\eclipse-workspace\\TestFileWriter\\src\\com\\zhj\\www\\Hello.dat");//从某个文件开始读入BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);int c = 0;System.out.println(fileInputStream.read());System.out.println(fileInputStream.read());fileInputStream.mark(100);for(int i = 0;i< 10 && (c = bufferedInputStream.read()) != -1;i++) {System.out.println(c + " ");}System.out.println();fileInputStream.reset();for(int i = 0;i< 10 && (c = bufferedInputStream.read()) != -1;i++) {System.out.println(c + " ");}fileInputStream.close();} catch (IOException e) {e.getStackTrace();}}
}

运行结果：
    ？

什么是流，就是管道，在一个文件中插了一条管道，可以读入，也可以写入。节点流也可以这么理解。

处理流呢？在节点流的基础上，外面又包了一层管道。

例子：TestBufferStream2.java

package com.zhj.www;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class TestBufferStream2 {public static void main(String[] args) {try {BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter("E:\\JavaCode\\eclipse-workspace\\TestBufferStream2\\src\\com\\zhj\\www\\HelloWorld.txt"));BufferedReader bufferedReader = new BufferedReader(new FileReader("E:\\JavaCode\\eclipse-workspace\\TestBufferStream2\\src\\com\\zhj\\www\\HelloWorld.txt"));String string = null;for(int i = 1;i<=100;i++) {string= String.valueOf(Math.random());bufferedWriter.write(string);bufferedWriter.newLine();}bufferedWriter.flush();while ((string = bufferedReader.readLine()) != null) {System.out.println(string);}bufferedWriter.close();bufferedReader.close();} catch (IOException e) {e.printStackTrace();}}
}

2、处理流之转换流：

举个例子：（TestTransForm1.java）

package com.zhj.www;
import java.io.*;
public class TestTransForm1 {public static void main(String[] args) {try {//转换流：OuputStream转化为Writer;OutputStreamWriter outputStreamWriter = new OutputStreamWriter(new FileOutputStream("E:\\JavaCode\\eclipse-workspace\\TestTransForm1\\src\\com\\zhj\\www\\hello.txt"));outputStreamWriter.write("Hello_World! ");System.out.println(outputStreamWriter.getEncoding());//输出编码方式outputStreamWriter.close();outputStreamWriter =new OutputStreamWriter(new FileOutputStream("E:\\JavaCode\\eclipse-workspace\\TestTransForm1\\src\\com\\zhj\\www\\hello.txt", true),"ISO8859_1");outputStreamWriter.write("Heihei!");System.out.println(outputStreamWriter.getEncoding());outputStreamWriter.close();} catch (Exception e) {e.getStackTrace();}}
}

分析这个例子：

再举个例子：（TestTransForm2.java）

package com.zhj.www;import java.io.*;public class TestTransForm2 {public static void main(String[] args) {InputStreamReader inputStreamReader = new InputStreamReader(System.in);BufferedReader bufferedInputStream = new BufferedReader(inputStreamReader);String string= null;try {string =bufferedInputStream.readLine();while (string!= null) {if (string.equalsIgnoreCase("exit")) {break;}System.out.println(string.toUpperCase());string = bufferedInputStream.readLine();}bufferedInputStream.close();} catch (IOException e) {e.getStackTrace();}}}

分析这个例子：

3、处理流之数据流：

直接上例子：（TestDataStream.java）

package com.zhj.www;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
public class TestDataStream {public static void main(String[] args) {ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();DataOutputStream dataOutputStream = new DataOutputStream(byteArrayOutputStream);try {dataOutputStream.writeDouble(Math.random());dataOutputStream.writeBoolean(true);ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());System.out.println(byteArrayInputStream.available());//9DataInputStream dataInputStream = new DataInputStream(byteArrayInputStream);System.out.println(dataInputStream.readDouble());System.out.println(dataInputStream.readBoolean());dataOutputStream.close();dataInputStream.close();} catch (IOException e) {e.getStackTrace();}}
}

//Math.random()是令系统随机选取大于等于 0.0 且小于 1.0 的伪随机 double 值，是Java语言常用代码

简单流程分析：

4、处理流之Print流：

举个例子：TestPrintStream1.java

分析：

代码意思：就是将从键盘输入的数据，保存到log.dat；然后再从log.data输出到命令行。

再举个例子：TestPrintStream2.java

简单分析：

再在举个例子：TestPrintStream3.java

简单分析：

代码的意思就是：把从键盘输入的内容保存到日志文件中，只要从键盘输入的不为null，就继续把从键盘输入的信息保存到指定的日志文件中，但当输入的等于exit，就停止往日志中写。

5、处理流之Object流：