MailService 装配了AOP，有一个public final变量test；UserSerivce注入了MailService，在UserSerivce里可以正常使用test变量

是版本问题？

1. MailService 

Component
public class MailService {
@Autowired(required = false)
private ZoneId zoneId = ZoneId.systemDefault();
@Value("#{smtpConfig.smtpHost}")
private String smtpHost;
@Value("#{smtpConfig.smtpPort}")
private int smtpPort;

public final String test="aaa";

public void setZoneId(ZoneId zoneId) {
this.zoneId = zoneId;
}
public String getTime() {
return ZonedDateTime.now(this.zoneId).format(DateTimeFormatter.ISO_ZONED_DATE_TIME);
}

public void sendLoginMail(User user) {
System.out.println(String.format("Hi, %s! You are logged in at %s", user.getName(), getTime()));
}

public void sendRegistrationMail(User user) {
System.out.println(String.format("Welcome, %s!", user.getName()));

}

@PostConstruct
public void init() {
System.out.println("Init mail service " + this.zoneId);
System.out.println("host: "+this.smtpHost);
System.out.println("port: "+this.smtpPort);
}
@PreDestroy
public void shutdown() {
System.out.println("Shutdown mail service");
}
}

2.  UserService 

package com.service;

import com.annotation.MetricTime;
import com.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

@Component
public class UserService {
@Autowired
private MailService mailService;
@Autowired
private DataSource dataSource;

public UserService(){
System.out.println("创建UserService bean");
}
public void setMailService(MailService mailService) {
this.mailService = mailService;
}

public User getUserFromDB(String email,String password) {
try(Connection conn=this.dataSource.getConnection()){
String sql="select id,name from user where email=? and password=? limit 1";
System.out.println(sql);
PreparedStatement ps = conn.prepareStatement(sql);
ps.setObject(1, email);
ps.setObject(2, password);
try(ResultSet rs=ps.executeQuery()){
while (rs.next()) {
long id = rs.getLong("id");
String name = rs.getString("name");
return new User(id,email,password,name);
}
}
}catch (SQLException e){
e.printStackTrace();
return null;
}catch (Exception e){
e.printStackTrace();
return null;
}
return null;
}

public User getUserFromDB(String email) throws SQLException {
try(Connection conn=this.dataSource.getConnection()){
String sql="select id,email,name from user where email=?";
System.out.println(sql);
PreparedStatement ps = conn.prepareStatement(sql);
ps.setObject(1, email);
try(ResultSet rs=ps.executeQuery()){
while (rs.next()) {
long id = rs.getLong("id");
String name = rs.getString("name");
User user=new User();
user.setName(name);
user.setId(id);
user.setEmail(email);
return user;
}
}
}
return null;
}

@MetricTime("login")
public User login(String email, String password) {
User user=getUserFromDB(email,password);
if(user!=null){
mailService.sendLoginMail(user);
}
return user;
}

public User registerUser2DB(User user) throws SQLException{
System.out.println(mailService.test);
try(Connection conn=this.dataSource.getConnection()) {
String sql="insert into user(name,email,password) values(?,?,?)";
PreparedStatement ps = conn.prepareStatement(sql);
ps.setObject(1, user.getName());
ps.setObject(2,user.getEmail());
ps.setObject(3,user.getPassword());
int rs=ps.executeUpdate();
if(rs>0){
return user;
}
}
return null;
}

public User register(String email, String password, String name) throws SQLException{
if(getUserFromDB(email)!=null){
throw new RuntimeException("email exist.");
}
User user=new User();
user.setEmail(email);
user.setName(name);
user.setPassword(password);
this.registerUser2DB(user);
mailService.sendRegistrationMail(user);

System.out.println("mailService.test: "+this.mailService.test);

return user;
}

public DataSource getDataSource() {
return dataSource;
}

public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
}
}

3. LoggingAspect 

@Aspect
@Component
public class LoggingAspect {

@Before("execution(public * com.service.MailService.*(..))")
public void doAcessCheck(){
System.err.println("[Before] do access check...");
}
}

4. AppConfig 测试

@Configuration
@ComponentScan
@EnableAspectJAutoProxy
public class AppConfig {

public static void main(String[] args) throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException, InstantiationException, SQLException {
ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
//MySqlConfig config= AppConfig.context.getBean(MySqlConfig.class);
UserService userService= context.getBean(UserService.class);
userService.register("Jimmy@123.com","123","Jimmy");
}

5. 运行日志 

select id,email,name from user where email=?

aaa

[Before] do access check...

Welcome, Jimmy!

mailService.test: aaa