http://www.cnblogs.com/hellokitty1/p/4473952.html
数据流：
DataInputStream，DataOutputStream。可以用于与计算机无关的格式读写java的基本数据类型以及String对象
对象流：
ObjectInputStream，ObjectOutputStream.
序列化：保存内存中对象的“全景图”。
为了实现对象序列化，对应的类必须实现Serializable接口。
Serializable接口中没有定义任何的方法，称之为“标记接口”。
如果加上了一个transient修饰符，该属性的值将不被序列化。
反序列化：使用ObjectInputStream类，将字节序列还原成对象的过程。
1 package com.lovo.day2;
2
3 import java.io.IOException;
4 import java.io.Serializable;
5 import java.util.Date;
6
7 public class Student implements Serializable {
8
9 private static final long serialVersionUID = 4282130869653374904L;
10
11 private String name;
12 private int age;
13 private boolean sex;
14 private double money;
15 private Date birth;
16 private Course course;
17
18 public Student(String name, int age, boolean sex, double money, Date birth,
19 Course course) {
20 super();
21 this.name = name;
22 this.age = age;
23 this.sex = sex;
24 this.money = money;
25 this.birth = birth;
26 this.course = course;
27 }
28
29 public String getName() {
30 return name;
31 }
32
33 public void setName(String name) {
34 this.name = name;
35 }
36
37 public int getAge() {
38 return age;
39 }
40
41 public void setAge(int age) {
42 this.age = age;
43 }
44
45 public boolean isSex() {
46 return sex;
47 }
48
49 public void setSex(boolean sex) {
50 this.sex = sex;
51 }
52
53 public double getMoney() {
54 return money;
55 }
56
57 public void setMoney(double money) {
58 this.money = money;
59 }
60
61 public Date getBirth() {
62 return birth;
63 }
64
65 public void setBirth(Date birth) {
66 this.birth = birth;
67 }
68
69 public Course getCourse() {
70 return course;
71 }
72
73 public void setCourse(Course course) {
74 this.course = course;
75 }
76
77 @Override
78 public String toString() {
79 return "Student [name=" + name + ", age=" + age + ", sex=" + sex
80 + ", money=" + money + ", birth=" + birth + ", course="
81 + course + "]";
82 }
83
84 /* private void readObject(java.io.ObjectInputStream in) throws IOException,
85 ClassNotFoundException {
86 System.out.println("读");
87 this.name = in.readUTF();
88 this.age = in.readInt();
89 this.sex = in.readBoolean();
90 this.course = (Course) in.readObject();
91 this.money = in.readDouble();
92 }
93
94 private void writeObject(java.io.ObjectOutputStream out) throws IOException {
95 System.out.println("写");
96 out.writeUTF(this.name);
97 out.writeInt(this.age);
98 out.writeBoolean(this.sex);
99 out.writeObject(course);
100 out.writeDouble(this.money);
101 }
102 */
103 }
1 package com.lovo.day2;
2
3 import java.io.Serializable;
4
5 public class Course implements Serializable {
6
7 private static final long serialVersionUID = 1L;
8
9 private int code;
10 private String name;
11
12 public int getCode() {
13 return code;
14 }
15
16 public void setCode(int code) {
17 this.code = code;
18 }
19
20 public String getName() {
21 return name;
22 }
23
24 public void setName(String name) {
25 this.name = name;
26 }
27
28 public Course(int code, String name) {
29 super();
30 this.code = code;
31 this.name = name;
32 }
33
34 @Override
35 public String toString() {
36 return "Course [code=" + code + ", name=" + name + "]";
37 }
38 }
1 package com.lovo.day2;
2
3 import java.io.FileInputStream;
4 import java.io.FileNotFoundException;
5 import java.io.FileOutputStream;
6 import java.io.IOException;
7 import java.io.ObjectInputStream;
8 import java.io.ObjectOutputStream;
9 import java.util.Date;
10
11 public class ObjectTest {
12
13 public static void main(String[] args) {
14 Student stu = new Student("张飞", 18, true, 10.0, new Date(), new Course(
15 1, "语文"));
16 Student stu2 = new Student("张飞2", 18, true, 10.0, new Date(), new Course(
17 2, "数学"));
18
19 // 序列化
20 ObjectOutputStream out = null;
21
22 try {
23 out = new ObjectOutputStream(
24 new FileOutputStream("d:\student.bin"));
25 out.writeObject(stu);
26 out.writeObject(stu2);
27 } catch (FileNotFoundException e) {
28 e.printStackTrace();
29 } catch (IOException e) {
30 e.printStackTrace();
31 } finally {
32 if (out != null) {
33 try {
34 out.close();
35 } catch (IOException e) {
36 e.printStackTrace();
37 }
38 }
39 }
40
41 // 反序列化
42 ObjectInputStream in = null;
43
44 try {
45 in = new ObjectInputStream(new FileInputStream("d:\student.bin"));
46 Student stu1 = (Student) in.readObject();
47 System.out.println(stu1);
48
49 System.out.println("*****************");
50
51 System.out.println(stu1.getCourse());
52
53 System.out.println("#######################################");
54
55 Student stu21 = (Student) in.readObject();
56 System.out.println(stu21);
57
58 System.out.println("*****************");
59
60 System.out.println(stu21.getCourse());
61 } catch (FileNotFoundException e) {
62 e.printStackTrace();
63 } catch (IOException e) {
64 e.printStackTrace();
65 } catch (ClassNotFoundException e) {
66 e.printStackTrace();
67 } finally {
68 if (in != null) {
69 try {
70 in.close();
71 } catch (IOException e) {
72 e.printStackTrace();
73 }
74 }
75 }
76 }
77 }