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                > DataInputStream 數據輸入流 DataOutputStream 數據輸出流 # 直接進行字符串的讀寫 使用數據流的writeUTF()和readUTF() 可以進行數據的格式化順序讀寫 通過DataOutputStream 向文件順序寫出 布爾值,整數和字符串。 然后再通過DataInputStream 順序讀入這些數據。 > 注: 要用DataInputStream 讀取一個文件,這個文件必須是由DataOutputStream 寫出的,否則會出現EOFException,因為DataOutputStream 在寫出的時候會做一些特殊標記,只有DataInputStream 才能成功的讀取。 ``` package com.dodoke.util; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; public class TestSteam11 { public static void main(String[] args) { write(); read(); } private static void write() { File f = new File("d:/log.txt"); try (FileOutputStream fos = new FileOutputStream(f); DataOutputStream dos = new DataOutputStream(fos);) { dos.writeBoolean(true); dos.writeInt(300); dos.writeUTF("123 this is gareen"); } catch (IOException e) { e.printStackTrace(); } } private static void read() { File f = new File("d:/log.txt"); try (FileInputStream fis = new FileInputStream(f); DataInputStream dis = new DataInputStream(fis);) { boolean b = dis.readBoolean(); int i = dis.readInt(); String str = dis.readUTF(); System.out.println("讀取到布爾值:" + b); System.out.println("讀取到整數:" + i); System.out.println("讀取到字符串:" + str); } catch (IOException e) { e.printStackTrace(); } } } ```
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