@Transactional(isolation = Isolation.DEFAULT, propagation = Propagation.REQUIRES_NEW)
public void write() throws Exception {
User user = userMapper.findByUserName("first");
System.out.println(
String.format("当前write线程%s,更新用户信息，用户%s，时间戳%tc", Thread.currentThread(), user, new Date()));
user.setAge("100");
userMapper.updateUserById(user);
System.out.println(
String.format(
"当前write线程%s,更新用户信息完成，用户%s，时间戳%tc", Thread.currentThread(), user, new Date()));
try {
TimeUnit.SECONDS.sleep(2);
} catch (InterruptedException e) {
e.printStackTrace();
}
user = userMapper.findByUserName("first");
System.out.println(
String.format("当前write线程%s,更新用户信息，用户%s，时间戳%tc", Thread.currentThread(), user, new Date()));
}
