class User implements Serializable {
private String username;
private String passwd;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPasswd() {
return passwd;
}
public void setPasswd(String passwd) {
this.passwd = passwd;
}
}
public class TestSerialize {
public static void main(String[] args) {
User user = new User();
user.setUsername("hengheng");
user.setPasswd("123456");
System.out.println("read before Serializable: ");
System.out.println("username: " + user.getUsername());
System.err.println("password: " + user.getPasswd());
try {
ObjectOutputStream os = new ObjectOutputStream(
new FileOutputStream("/Users/admin/Desktop/test/user.txt"));
os.writeObject(user); // 将User对象写进文件
os.flush();
os.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
ObjectInputStream is = new ObjectInputStream(new FileInputStream(
"/Users/admin/Desktop/test/user.txt"));
user = (User) is.readObject(); // 从流中读取User的数据
is.close();
System.out.println("\nread after Serializable: ");
System.out.println("username: " + user.getUsername());
System.err.println("password: " + user.getPasswd());
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
}
序列化前数据:
username: hengheng
password: 123456
序列化后数据:
username: hengheng
password: 123456
class User implements Serializable {
private String username;
private transient String passwd;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPasswd() {
return passwd;
}
public void setPasswd(String passwd) {
this.passwd = passwd;
}
序列化前数据:
username: hengheng
password: 123456
序列化后数据:
username: hengheng
password: null
class User implements Serializable {
private static String username;
private transient String passwd;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPasswd() {
return passwd;
}
public void setPasswd(String passwd) {
this.passwd = passwd;
}
序列化前数据:
username: hengheng
password: 123456
序列化后数据:
username: hengheng
password: null
public class TestSerialize {
public static void main(String[] args) {
User user = new User();
user.setUsername("hengheng");
user.setPasswd("123456");
System.out.println("序列化前数据: ");
System.out.println("username: " + user.getUsername());
System.err.println("password: " + user.getPasswd());
try {
ObjectOutputStream os = new ObjectOutputStream(
new FileOutputStream("/Users/admin/Desktop/test/user.txt"));
os.writeObject(user); // 将User对象写进文件
os.flush();
os.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
User.username = "小明";
try {
ObjectInputStream is = new ObjectInputStream(new FileInputStream(
"/Users/admin/Desktop/test/user.txt"));
user = (User) is.readObject(); // 从流中读取User的数据
is.close();
System.out.println("\n序列化后数据: ");
System.out.println("username: " + user.getUsername());
System.err.println("password: " + user.getPasswd());
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
}
class User implements Serializable {
public static String username;
private transient String passwd;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPasswd() {
return passwd;
}
public void setPasswd(String passwd) {
this.passwd = passwd;
}
}
User.username = "小明";
序列化前数据:
username: hengheng
password: 123456
序列化后数据:
username: 小明
password: null
private static final long serialVersionUID = 8294180014912103005L
class User implements Serializable {
public static String username;
private transient String passwd;
private String age;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPasswd() {
return passwd;
}
public void setPasswd(String passwd) {
this.passwd = passwd;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
}
public static void main(String[] args) {
try {
ObjectInputStream is = new ObjectInputStream(new FileInputStream(
"/Users/admin/Desktop/test/user.txt"));
User user = (User) is.readObject(); // 从流中读取User的数据
is.close();
System.out.println("\n修改User类之后的数据: ");
System.out.println("username: " + user.getUsername());
System.err.println("password: " + user.getPasswd());
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
class User implements Serializable {
private static final long serialVersionUID = 4348344328769804325L;
public static String username;
private transient String passwd;
private String age;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPasswd() {
return passwd;
}
public void setPasswd(String passwd) {
this.passwd = passwd;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
}
序列化前数据:
username: hengheng
password: 123456
序列化后数据:
username: 小明
password: null
public class ExternalizableTest implements Externalizable {
private transient String content = "我是被transient修饰的变量哦";
@Override
public void writeExternal(ObjectOutput out) throws IOException {
out.writeObject(content);
}
@Override
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
content = (String) in.readObject();
}
public static void main(String[] args) throws Exception {
ExternalizableTest et = new ExternalizableTest();
ObjectOutput out = new ObjectOutputStream(new FileOutputStream(
new File("test")));
out.writeObject(et);
ObjectInput in = new ObjectInputStream(new FileInputStream(new File(
"test")));
et = (ExternalizableTest) in.readObject();
System.out.println(et.content);
out.close();
in.close();
}
}
我是被transient修饰的变量哦
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