1 /**
 2  * 針對對象的文件讀寫
 3  */
 4 
 5 //導入包
 6 import java.io.File;
 7 import java.io.FileInputStream;
 8 import java.io.FileNotFoundException;
 9 import java.io.FileOutputStream;
10 import java.io.IOException;
11 import java.io.ObjectInputStream;
12 import java.io.ObjectOutputStream;
13 import java.util.HashMap;
 
14 
15 public class qwe {
16 
17     public static void main(String[] args) {
18         try {
19             File f = new File("D:\\Desktop\\NewFile\\hasKey.txt");//關聯文件
20             FileOutputStream wr = new FileOutputStream("D:\\Desktop\\NewFile\\hasKey.txt");//文件寫
21             ObjectOutputStream objw = new
 
 ObjectOutputStream(wr);//創建對象輸出流
22             FileInputStream re = new FileInputStream("D:\\Desktop\\NewFile\\hasKey.txt");//讀文件
23             ObjectInputStream objr = new ObjectInputStream(re); //創建對象輸入流
24             HashMap<String,String> has = new HashMap<String,String>();//創建集合
25             has.put("001", "hello")    ;                
 
26             
27             objw.writeObject(has);//從對象輸出流中寫入                                
28             HashMap<String, String> has1 = (HashMap<String, String>) objr.readObject();//從對象輸入流中讀（強制轉換類型）
29             
30             System.out.println(has1);                        
31                                                              
32         } catch (FileNotFoundException e) {//無文件異常捕獲
33             // TODO Auto-generated catch block
34             e.printStackTrace();
35         }
36         catch (IOException e) {//捕獲IO異常
37             // TODO Auto-generated catch block
38             e.printStackTrace();
39         }catch (ClassNotFoundException e) {//捕獲不存在的類型的異常
40                 
41                 e.printStackTrace();
42             }
43         
44         
45     }
46 
47 }

運行結果為

存入文本的數據是

JAVA中關於對像的讀寫