Java DataInputStream和DataOutputStream示例

DataInputStream类以与机器无关的方式从基础输入流中读取原始Java数据类型。 而DataOutputStream类以可移植的方式将原始Java数据类型写入输出流。

下面是一个演示DataInputStream和DataOutputStream使用的示例。

文件：DataInputOutputStreamExample.java –

package com.yiibai.tutorial.io;  import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException;  /**  * @author yiibai   * DataInputOutputStreamExample.java   * Nov 5, 2016  */ public class DataInputOutputStreamExample {     public static void main(String[] args) {         File file = new File("file.txt");          /*Write primitive data type to file*/         FileOutputStream fileOutputStream = null;         DataOutputStream dataOutputStream = null;         try {             fileOutputStream=new FileOutputStream(file);             dataOutputStream=new DataOutputStream(fileOutputStream);             dataOutputStream.writeInt(50);             dataOutputStream.writeDouble(400.25);             dataOutputStream.writeChar('A');             dataOutputStream.flush();         } catch (IOException e) {             e.printStackTrace();         }finally {             try {                 if(fileOutputStream!=null){                     fileOutputStream.close();                 }                 if(dataOutputStream!=null){                     dataOutputStream.close();                 }             } catch (Exception e) {                 e.printStackTrace();             }         }           /*Read primitive data type from file*/         FileInputStream fileInputStream = null;         DataInputStream dataInputStream = null;         try {             fileInputStream = new FileInputStream(file);             dataInputStream = new DataInputStream(fileInputStream);             System.out.println(dataInputStream.readInt());             System.out.println(dataInputStream.readDouble());             System.out.println(dataInputStream.readChar());         } catch (IOException e) {             e.printStackTrace();         }finally {             try {                 if(fileInputStream!=null){                     fileInputStream.close();                 }                 if(dataInputStream!=null){                     dataInputStream.close();                 }             } catch (Exception e) {                 e.printStackTrace();             }         }     } } 

执行上面示例代码，得到以下结果：

50 400.25 A