mysql 悲观锁 乐观锁_Mysql锁机制--乐观锁 & 悲观锁

于 2021-01-18 23:22:16 发布
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===============

从

第一部分 悲观锁

1 概念(来自百科)

悲观锁，正如其名，它指的是对数据被外界(包括当前系统的其它事务，以及来自外部系统的事务处理)修改持保守态度，因此，在整个数据处理过程中，将数据处于锁定状态。悲观锁的实现，往往依靠数据库提供的锁机制(也只有数据库层提供的锁机制才能真正保证数据访问的排它性，否则，即使在本系统中实现了加锁机制，也无法保证外部系统不会修改数据)。

还可以简单理解，就是Java中的 Synchronized 关键字。只要对代码加了 Synchronized 关键字，JVM 底层就能保证其线程安全性。

那么，在 Mysql 中如何实现悲观锁呢？下面分别以命令行以及Java代码的方式进行演示。

2 命令行演示

2.1 准备数据

DROP DATABASE IF EXISTScyhTest;CREATE DATABASEcyhTest;USEcyhTest;DROP TABLE IF EXISTSemployee;CREATE TABLE IF NOT EXISTSemployee (

idINTEGER NOT NULL,money INTEGER,

versionINTEGER,PRIMARY KEY(id)

)

ENGINE=INNODB;INSERT INTO employee VALUE (1, 0, 1);SELECT * FROM employee;

c16bcd76c120a332167c7236c1c1f942.png

目前数据库中只有一条记录，且初始Money=0

2.2 测试

测试准备：

还是两个会话(终端)，左边会话是白色背景、右边会话是黑色背景

关闭自动提交：set autocommit = 0;

现在开始测试：

第一步：两个终端均关闭自动提交

左边：

ca7096bf18311bb0d9ddc780e93e8d1f.png

右边：

6e8821823611cb95316db2616a0c6ecf.png

第二步：左边利用 select .... for update 的悲观锁语法锁住记录

select * from employee where id = 1 for update;

722301a82766e833fefd945ed3b96a5a.png

第三步：右边也尝试利用 select .... for update 的悲观锁语法锁住记录

7cebe05cb8e6aaad2ce1a2f5fc804a2b.png

可以看到，Sql语句被挂起(被阻塞)！

提示：如果被阻塞的时间太长，会提示如下：

d106c893c896ff00d7e2742a7add9f18.png

第四步：左边执行更新操作并提交事务

Sql语句：

update employee set money = 0 + 1 where id = 1;commit;

结果：

303dcd372c2e5f2f0b288c9f13f7437f.png

分析：

Money 的旧值为0，所以更新时 Money=0+1

一执行 commit 后，注意查看右边Sql语句的变化

第五步：查看右边Sql语句的变化

dfb5a5a18c032ba51adaeb9fd5515013.png

分析：

被左边悲观锁阻塞了 11.33 秒

Money=1，这是左边更新后的结果

2.3 结论

可以看到，当左边(事务A)使用了 select ... for update 的悲观锁后，右边(事务B)再想使用将被阻塞，同时，阻塞被解除后事务B能看到事务A对数据的修改，所以，这就可以很好地解决并发事务的更新丢失问题啦(诚然，这也是人家悲观锁的分内事)

3 Java代码演示

Demo 工程名称：usingMybatis

3.1 准备

确保数据库用户名和密码对应；执行 test.sql 文件中的脚本；

3.2 业务逻辑代码

XML 文件中的 Mapper：

SELECT * FROM employee WHERE id = #{id} FOR UPDATE

提示：这里是 SELCT ... FOR UPDATE

Service 中的业务逻辑：

1 @Transactional(rollbackFor = RuntimeException.class)2 public voidincreaseMoneyWithPessimisticLock(Integer id) {3 Employee employee =employeeMapper.findByIdWithPessimisticLock(id);4 final Integer oldMoney =employee.getMoney();5 LOGGER.info("oldMoney: {}", oldMoney);6 employee.setMoney(oldMoney + 1);7 employeeMapper.updateEmployee(employee);8 }

提示：第3行中的 findByIdWithPessimisticLock() 方法就对应上面XML文件中的Mapper，有悲观锁

3.3 测试代码

private voidincreaseMoneyWithPessimisticLock() {int threadCount = 100;while (threadCount-- > 0) {new Thread(() -> employeeService.increaseMoneyWithPessimisticLock(1)).start();

}

}

提示：100根线程，每个线程将Money值加1，预期结果是100

3.4 执行测试&查看结果

SELECT * FROM employee;

69ee46a5ab54ef1ce230e8e06defe912.png

Money=100，是预期结果。

3.5 查看日志

8f900a89c6347c561fdf2122f13be562.png

961ddebeb323a10fe0623af514929fc1.png

1 2018-04-25 15:12:14,335 INFO [Thread-5] (EmployeeService.java:36) - oldMoney: 0

2 2018-04-25 15:12:14,343 INFO [Thread-25] (EmployeeService.java:36) - oldMoney: 1

3 2018-04-25 15:12:14,345 INFO [Thread-27] (EmployeeService.java:36) - oldMoney: 2

4 2018-04-25 15:12:14,347 INFO [Thread-23] (EmployeeService.java:36) - oldMoney: 3

5 2018-04-25 15:12:14,349 INFO [Thread-13] (EmployeeService.java:36) - oldMoney: 4

6 2018-04-25 15:12:14,350 INFO [Thread-38] (EmployeeService.java:36) - oldMoney: 5

7 2018-04-25 15:12:14,351 INFO [Thread-24] (EmployeeService.java:36) - oldMoney: 6

8 2018-04-25 15:12:14,353 INFO [Thread-4] (EmployeeService.java:36) - oldMoney: 7

9 2018-04-25 15:12:14,355 INFO [Thread-26] (EmployeeService.java:36) - oldMoney: 8

10 2018-04-25 15:12:14,357 INFO [Thread-8] (EmployeeService.java:36) - oldMoney: 9

11 2018-04-25 15:12:14,360 INFO [Thread-3] (EmployeeService.java:36) - oldMoney: 10

12 2018-04-25 15:12:14,361 INFO [Thread-81] (EmployeeService.java:36) - oldMoney: 11

13 2018-04-25 15:12:14,363 INFO [Thread-20] (EmployeeService.java:36) - oldMoney: 12

14 2018-04-25 15:12:14,365 INFO [Thread-40] (EmployeeService.java:36) - oldMoney: 13

15 2018-04-25 15:12:14,366 INFO [Thread-29] (EmployeeService.java:36) - oldMoney: 14

16 2018-04-25 15:12:14,453 INFO [Thread-14] (EmployeeService.java:36) - oldMoney: 15

17 2018-04-25 15:12:14,475 INFO [Thread-7] (EmployeeService.java:36) - oldMoney: 16

18 2018-04-25 15:12:14,485 INFO [Thread-11] (EmployeeService.java:36) - oldMoney: 17

19 2018-04-25 15:12:14,488 INFO [Thread-48] (EmployeeService.java:36) - oldMoney: 18

20 2018-04-25 15:12:14,491 INFO [Thread-47] (EmployeeService.java:36) - oldMoney: 19

21 2018-04-25 15:12:14,494 INFO [Thread-12] (EmployeeService.java:36) - oldMoney: 20

22 2018-04-25 15:12:14,497 INFO [Thread-72] (EmployeeService.java:36) - oldMoney: 21

23 2018-04-25 15:12:14,500 INFO [Thread-46] (EmployeeService.java:36) - oldMoney: 22

24 2018-04-25 15:12:14,501 INFO [Thread-44] (EmployeeService.java:36) - oldMoney: 23

25 2018-04-25 15:12:14,503 INFO [Thread-45] (EmployeeService.java:36) - oldMoney: 24

26 2018-04-25 15:12:14,504 INFO [Thread-41] (EmployeeService.java:36) - oldMoney: 25

27 2018-04-25 15:12:14,505 INFO [Thread-9] (EmployeeService.java:36) - oldMoney: 26

28 2018-04-25 15:12:14,507 INFO [Thread-19] (EmployeeService.java:36) - oldMoney: 27

29 2018-04-25 15:12:14,508 INFO [Thread-55] (EmployeeService.java:36) - oldMoney: 28

30 2018-04-25 15:12:14,509 INFO [Thread-36] (EmployeeService.java:36) - oldMoney: 29

31 2018-04-25 15:12:14,518 INFO [Thread-43] (EmployeeService.java:36) - oldMoney: 30

32 2018-04-25 15:12:14,547 INFO [Thread-53] (EmployeeService.java:36) - oldMoney: 31

33 2018-04-25 15:12:14,556 INFO [Thread-52] (EmployeeService.java:36) - oldMoney: 32

34 2018-04-25 15:12:14,558 INFO [Thread-51] (EmployeeService.java:36) - oldMoney: 33

35 2018-04-25 15:12:14,560 INFO [Thread-50] (EmployeeService.java:36) - oldMoney: 34

36 2018-04-25 15:12:14,562 INFO [Thread-32] (EmployeeService.java:36) - oldMoney: 35

37 2018-04-25 15:12:14,563 INFO [Thread-85] (EmployeeService.java:36) - oldMoney: 36

38 2018-04-25 15:12:14,565 INFO [Thread-84] (EmployeeService.java:36) - oldMoney: 37

39 2018-04-25 15:12:14,567 INFO [Thread-33] (EmployeeService.java:36) - oldMoney: 38

40 2018-04-25 15:12:14,568 INFO [Thread-82] (EmployeeService.java:36) - oldMoney: 39

41 2018-04-25 15:12:14,570 INFO [Thread-34] (EmployeeService.java:36) - oldMoney: 40

42 2018-04-25 15:12:14,571 INFO [Thread-35] (EmployeeService.java:36) - oldMoney: 41

43 2018-04-25 15:12:14,573 INFO [Thread-83] (EmployeeService.java:36) - oldMoney: 42

44 2018-04-25 15:12:14,574 INFO [Thread-42] (EmployeeService.java:36) - oldMoney: 43

45 2018-04-25 15:12:14,575 INFO [Thread-22] (EmployeeService.java:36) - oldMoney: 44

46 2018-04-25 15:12:14,585 INFO [Thread-30] (EmployeeService.java:36) - oldMoney: 45

47 2018-04-25 15:12:14,586 INFO [Thread-28] (EmployeeService.java:36) - oldMoney: 46

48 2018-04-25 15:12:14,613 INFO [Thread-16] (EmployeeService.java:36) - oldMoney: 47

49 2018-04-25 15:12:14,615 INFO [Thread-17] (EmployeeService.java:36) - oldMoney: 48

50 2018-04-25 15:12:14,616 INFO [Thread-21] (EmployeeService.java:36) - oldMoney: 49

51 2018-04-25 15:12:14,618 INFO [Thread-18] (EmployeeService.java:36) - oldMoney: 50

52 2018-04-25 15:12:14,619 INFO [Thread-37] (EmployeeService.java:36) - oldMoney: 51

53 2018-04-25 15:12:14,621 INFO [Thread-39] (EmployeeService.java:36) - oldMoney: 52

54 2018-04-25 15:12:14,623 INFO [Thread-2] (EmployeeService.java:36) - oldMoney: 53

55 2018-04-25 15:12:14,624 INFO [Thread-1] (EmployeeService.java:36) - oldMoney: 54

56 2018-04-25 15:12:14,626 INFO [Thread-10] (EmployeeService.java:36) - oldMoney: 55

57 2018-04-25 15:12:14,627 INFO [Thread-15] (EmployeeService.java:36) - oldMoney: 56

58 2018-04-25 15:12:14,628 INFO [Thread-56] (EmployeeService.java:36) - oldMoney: 57

59 2018-04-25 15:12:14,630 INFO [Thread-54] (EmployeeService.java:36) - oldMoney: 58

60 2018-04-25 15:12:14,632 INFO [Thread-31] (EmployeeService.java:36) - oldMoney: 59

61 2018-04-25 15:12:14,642 INFO [Thread-57] (EmployeeService.java:36) - oldMoney: 60

62 2018-04-25 15:12:14,645 INFO [Thread-6] (EmployeeService.java:36) - oldMoney: 61

63 2018-04-25 15:12:14,672 INFO [Thread-62] (EmployeeService.java:36) - oldMoney: 62

64 2018-04-25 15:12:14,677 INFO [Thread-59] (EmployeeService.java:36) - oldMoney: 63

65 2018-04-25 15:12:14,679 INFO [Thread-61] (EmployeeService.java:36) - oldMoney: 64

66 2018-04-25 15:12:14,680 INFO [Thread-58] (EmployeeService.java:36) - oldMoney: 65

67 2018-04-25 15:12:14,681 INFO [Thread-80] (EmployeeService.java:36) - oldMoney: 66

68 2018-04-25 15:12:14,682 INFO [Thread-76] (EmployeeService.java:36) - oldMoney: 67

69 2018-04-25 15:12:14,684 INFO [Thread-78] (EmployeeService.java:36) - oldMoney: 68

70 2018-04-25 15:12:14,685 INFO [Thread-100] (EmployeeService.java:36) - oldMoney: 69

71 2018-04-25 15:12:14,686 INFO [Thread-99] (EmployeeService.java:36) - oldMoney: 70

72 2018-04-25 15:12:14,688 INFO [Thread-79] (EmployeeService.java:36) - oldMoney: 71

73 2018-04-25 15:12:14,689 INFO [Thread-94] (EmployeeService.java:36) - oldMoney: 72

74 2018-04-25 15:12:14,690 INFO [Thread-60] (EmployeeService.java:36) - oldMoney: 73

75 2018-04-25 15:12:14,691 INFO [Thread-77] (EmployeeService.java:36) - oldMoney: 74

76 2018-04-25 15:12:14,709 INFO [Thread-95] (EmployeeService.java:36) - oldMoney: 75

77 2018-04-25 15:12:14,711 INFO [Thread-96] (EmployeeService.java:36) - oldMoney: 76

78 2018-04-25 15:12:14,712 INFO [Thread-98] (EmployeeService.java:36) - oldMoney: 77

79 2018-04-25 15:12:14,738 INFO [Thread-75] (EmployeeService.java:36) - oldMoney: 78

80 2018-04-25 15:12:14,740 INFO [Thread-74] (EmployeeService.java:36) - oldMoney: 79

81 2018-04-25 15:12:14,741 INFO [Thread-73] (EmployeeService.java:36) - oldMoney: 80

82 2018-04-25 15:12:14,742 INFO [Thread-71] (EmployeeService.java:36) - oldMoney: 81

83 2018-04-25 15:12:14,743 INFO [Thread-69] (EmployeeService.java:36) - oldMoney: 82

84 2018-04-25 15:12:14,745 INFO [Thread-70] (EmployeeService.java:36) - oldMoney: 83

85 2018-04-25 15:12:14,746 INFO [Thread-68] (EmployeeService.java:36) - oldMoney: 84

86 2018-04-25 15:12:14,748 INFO [Thread-66] (EmployeeService.java:36) - oldMoney: 85

87 2018-04-25 15:12:14,749 INFO [Thread-67] (EmployeeService.java:36) - oldMoney: 86

88 2018-04-25 15:12:14,751 INFO [Thread-64] (EmployeeService.java:36) - oldMoney: 87

89 2018-04-25 15:12:14,754 INFO [Thread-65] (EmployeeService.java:36) - oldMoney: 88

90 2018-04-25 15:12:14,755 INFO [Thread-63] (EmployeeService.java:36) - oldMoney: 89

91 2018-04-25 15:12:14,767 INFO [Thread-97] (EmployeeService.java:36) - oldMoney: 90

92 2018-04-25 15:12:14,769 INFO [Thread-93] (EmployeeService.java:36) - oldMoney: 91

93 2018-04-25 15:12:14,770 INFO [Thread-49] (EmployeeService.java:36) - oldMoney: 92

94 2018-04-25 15:12:14,796 INFO [Thread-92] (EmployeeService.java:36) - oldMoney: 93

95 2018-04-25 15:12:14,801 INFO [Thread-91] (EmployeeService.java:36) - oldMoney: 94

96 2018-04-25 15:12:14,803 INFO [Thread-89] (EmployeeService.java:36) - oldMoney: 95

97 2018-04-25 15:12:14,803 INFO [Thread-90] (EmployeeService.java:36) - oldMoney: 96

98 2018-04-25 15:12:14,804 INFO [Thread-88] (EmployeeService.java:36) - oldMoney: 97

99 2018-04-25 15:12:14,806 INFO [Thread-87] (EmployeeService.java:36) - oldMoney: 98

100 2018-04-25 15:12:14,807 INFO [Thread-86] (EmployeeService.java:36) - oldMoney: 99

View Code

可以看到，oldMoney 值由0到99依次严格递增且不重复(这就是想要的效果)。

第二部分 乐观锁

1 概念

1.1 理解方式一(来自网上其它小伙伴的博客)

乐观锁认为一般情况下数据不会造成冲突，所以在数据进行提交更新时才会对数据的冲突与否进行检测。如果没有冲突那就OK；如果出现冲突了，则返回错误信息并让用户决定如何去做。

1.2 理解方式二(来自网上其它小伙伴的博客)

乐观锁的特点是先进行业务操作，不到万不得已不会去拿锁。乐观地认为拿锁多半会是成功的，因此在完成业务操作需要实际更新数据的最后一步再去拿一下锁。

1.3 我的理解

理解一：就是 CAS 操作

理解二：类似于 SVN、GIt 这些版本管理系统，当修改了某个文件需要提交的时候，它会检查文件的当前版本是否与服务器上的一致，如果一致那就可以直接提交，如果不一致，那就必须先更新服务器上的最新代码然后再提交(也就是先将这个文件的版本更新成和服务器一样的版本)

2 如何实现乐观锁呢

首先说明一点的是：乐观锁在数据库上的实现完全是逻辑的，数据库本身不提供支持，而是需要开发者自己来实现。

常见的做法有两种：版本号控制及时间戳控制。

版本号控制的原理：

为表中加一个 version 字段；

当读取数据时，连同这个 version 字段一起读出；

数据每更新一次就将此值加一；

当提交更新时，判断数据库表中对应记录的当前版本号是否与之前取出来的版本号一致，如果一致则可以直接更新，如果不一致则表示是过期数据需要重试或者做其它操作(PS：这完完全全就是 CAS 的实现逻辑呀~)

至于时间戳控制，其原理和版本号控制差不多，也是在表中添加一个 timestamp 的时间戳字段，然后提交更新时判断数据库中对应记录的当前时间戳是否与之前取出来的时间戳一致，一致就更新，不一致就重试。

3 Java代码演示

3.1 准备

还是之前的Java代码；这里使用版本号控制来实现乐观锁。

3.2 业务逻辑代码

XMP 文件中的 Mapper：

UPDATE employee SET money = #{e.money}, version = #{e.version} + 1 WHERE id = #{e.id} AND #{e.version} =version

提示：

SET 中有 version = #{e.version} + 1 的操作

WHERE 条件中有 #{e.version} = version 的判断

Service 中的业务逻辑：

1 /**

2 * 失败尝试3 *@paramid4 */

5 public voidincreaseMoneyWithOptimisticLock(Integer id) {6 int tryTimes = 0;7 while (true) {8 tryTimes++;9 if (internalIncreaseMoneyWithOptimisticLock(id) != 0) {10 //说明更新成功，直接退出

11 break;12 }13 if (tryTimes == 200) {14 //达到最大重试次数，退出

15 break;16 }17 try{18 //休息一段时间后再重试

19 TimeUnit.MILLISECONDS.sleep(new Random().nextInt(1000));20 } catch(InterruptedException e) {21 e.printStackTrace();22 Thread.currentThread().interrupt();23 }24 }25 LOGGER.info("tryTimes: {}", tryTimes);26 }27

28 /**

29 * 查找Employee对象，并进行更新30 *@paramid31 *@return

32 */

33 @Transactional(rollbackFor = RuntimeException.class)34 publicInteger internalIncreaseMoneyWithOptimisticLock(Integer id) {35 Employee employee =employeeMapper.findById(id);36 final Integer oldMoney =employee.getMoney();37 LOGGER.info("oldMoney: {}", oldMoney);38 employee.setMoney(oldMoney + 1);39 returnemployeeMapper.updateEmployeeWithOptimisticLock(employee);40 }

提示：

乐观锁，其实是开发者自己实现的逻辑

更新失败后，休息一段时间后再进行重试

3.3 测试代码

private voidincreaseMoneyWithOptimisticLock() {int threadCount = 100;while (threadCount-- > 0) {new Thread(() -> employeeService.increaseMoneyWithOptimisticLock(1)).start();

}

}

提示：100根线程，每个线程将Money值加1，预期结果是Money的值在之前的基础上增加100

3.4 执行测试&查看结果

062c274fed87bd8d18e627f193d32986.png

之前Money=100，现在预期增加100，所以现在Money=200符合预期。同时，version 字段的值也由最初的1更新为101(也被更新了100次，每次加一)。

3.5 查看日志

8f900a89c6347c561fdf2122f13be562.png

961ddebeb323a10fe0623af514929fc1.png

1 2018-04-25 16:24:07,851 INFO [Thread-36] (EmployeeService.java:77) - oldMoney: 100

2 2018-04-25 16:24:07,853 INFO [Thread-54] (EmployeeService.java:77) - oldMoney: 100

3 2018-04-25 16:24:07,856 INFO [Thread-55] (EmployeeService.java:77) - oldMoney: 100

4 2018-04-25 16:24:07,856 INFO [Thread-45] (EmployeeService.java:77) - oldMoney: 100

5 2018-04-25 16:24:07,858 INFO [Thread-56] (EmployeeService.java:77) - oldMoney: 100

6 2018-04-25 16:24:07,858 INFO [Thread-53] (EmployeeService.java:77) - oldMoney: 100

7 2018-04-25 16:24:07,858 INFO [Thread-33] (EmployeeService.java:77) - oldMoney: 100

8 2018-04-25 16:24:07,859 INFO [Thread-57] (EmployeeService.java:77) - oldMoney: 100

9 2018-04-25 16:24:07,859 INFO [Thread-31] (EmployeeService.java:77) - oldMoney: 100

10 2018-04-25 16:24:07,863 INFO [Thread-30] (EmployeeService.java:77) - oldMoney: 101

11 2018-04-25 16:24:07,868 INFO [Thread-29] (EmployeeService.java:77) - oldMoney: 101

12 2018-04-25 16:24:07,880 INFO [Thread-75] (EmployeeService.java:77) - oldMoney: 101

13 2018-04-25 16:24:07,881 INFO [Thread-76] (EmployeeService.java:77) - oldMoney: 102

14 2018-04-25 16:24:07,882 INFO [Thread-78] (EmployeeService.java:77) - oldMoney: 102

15 2018-04-25 16:24:07,883 INFO [Thread-77] (EmployeeService.java:77) - oldMoney: 102

16 2018-04-25 16:24:07,885 INFO [Thread-79] (EmployeeService.java:77) - oldMoney: 103

17 2018-04-25 16:24:07,887 INFO [Thread-80] (EmployeeService.java:77) - oldMoney: 103

18 2018-04-25 16:24:07,888 INFO [Thread-28] (EmployeeService.java:77) - oldMoney: 104

19 2018-04-25 16:24:07,890 INFO [Thread-27] (EmployeeService.java:77) - oldMoney: 104

20 2018-04-25 16:24:07,892 INFO [Thread-26] (EmployeeService.java:77) - oldMoney: 105

21 2018-04-25 16:24:07,894 INFO [Thread-25] (EmployeeService.java:77) - oldMoney: 105

22 2018-04-25 16:24:07,895 INFO [Thread-24] (EmployeeService.java:77) - oldMoney: 106

23 2018-04-25 16:24:07,897 INFO [Thread-83] (EmployeeService.java:77) - oldMoney: 106

24 2018-04-25 16:24:07,898 INFO [Thread-82] (EmployeeService.java:77) - oldMoney: 106

25 2018-04-25 16:24:07,900 INFO [Thread-84] (EmployeeService.java:77) - oldMoney: 107

26 2018-04-25 16:24:07,904 INFO [Thread-21] (EmployeeService.java:77) - oldMoney: 108

27 2018-04-25 16:24:07,906 INFO [Thread-20] (EmployeeService.java:77) - oldMoney: 109

28 2018-04-25 16:24:07,907 INFO [Thread-6] (EmployeeService.java:77) - oldMoney: 109

29 2018-04-25 16:24:07,908 INFO [Thread-9] (EmployeeService.java:77) - oldMoney: 110

30 2018-04-25 16:24:07,909 INFO [Thread-85] (EmployeeService.java:77) - oldMoney: 110

31 2018-04-25 16:24:07,909 INFO [Thread-86] (EmployeeService.java:77) - oldMoney: 111

32 2018-04-25 16:24:07,911 INFO [Thread-91] (EmployeeService.java:77) - oldMoney: 111

33 2018-04-25 16:24:07,912 INFO [Thread-81] (EmployeeService.java:77) - oldMoney: 112

34 2018-04-25 16:24:07,913 INFO [Thread-90] (EmployeeService.java:77) - oldMoney: 112

35 2018-04-25 16:24:07,915 INFO [Thread-96] (EmployeeService.java:77) - oldMoney: 112

36 2018-04-25 16:24:07,924 INFO [Thread-97] (EmployeeService.java:77) - oldMoney: 113

37 2018-04-25 16:24:07,926 INFO [Thread-36] (EmployeeService.java:65) - tryTimes: 1

38 2018-04-25 16:24:07,928 INFO [Thread-18] (EmployeeService.java:77) - oldMoney: 113

39 2018-04-25 16:24:07,929 INFO [Thread-4] (EmployeeService.java:77) - oldMoney: 113

40 2018-04-25 16:24:07,932 INFO [Thread-94] (EmployeeService.java:77) - oldMoney: 114

41 2018-04-25 16:24:07,934 INFO [Thread-12] (EmployeeService.java:77) - oldMoney: 114

42 2018-04-25 16:24:07,935 INFO [Thread-93] (EmployeeService.java:77) - oldMoney: 114

43 2018-04-25 16:24:07,939 INFO [Thread-92] (EmployeeService.java:77) - oldMoney: 115

44 2018-04-25 16:24:07,940 INFO [Thread-69] (EmployeeService.java:77) - oldMoney: 115

45 2018-04-25 16:24:07,960 INFO [Thread-86] (EmployeeService.java:65) - tryTimes: 1

46 2018-04-25 16:24:07,961 INFO [Thread-9] (EmployeeService.java:65) - tryTimes: 1

47 2018-04-25 16:24:07,960 INFO [Thread-75] (EmployeeService.java:65) - tryTimes: 1

48 2018-04-25 16:24:07,962 INFO [Thread-33] (EmployeeService.java:77) - oldMoney: 116

49 2018-04-25 16:24:07,963 INFO [Thread-87] (EmployeeService.java:77) - oldMoney: 116

50 2018-04-25 16:24:07,963 INFO [Thread-6] (EmployeeService.java:77) - oldMoney: 116

51 2018-04-25 16:24:07,964 INFO [Thread-20] (EmployeeService.java:65) - tryTimes: 1

52 2018-04-25 16:24:07,964 INFO [Thread-21] (EmployeeService.java:65) - tryTimes: 1

53 2018-04-25 16:24:07,964 INFO [Thread-90] (EmployeeService.java:65) - tryTimes: 1

54 2018-04-25 16:24:07,965 INFO [Thread-26] (EmployeeService.java:65) - tryTimes: 1

55 2018-04-25 16:24:07,965 INFO [Thread-28] (EmployeeService.java:65) - tryTimes: 1

56 2018-04-25 16:24:07,965 INFO [Thread-83] (EmployeeService.java:65) - tryTimes: 1

57 2018-04-25 16:24:07,966 INFO [Thread-76] (EmployeeService.java:65) - tryTimes: 1

58 2018-04-25 16:24:07,966 INFO [Thread-79] (EmployeeService.java:65) - tryTimes: 1

59 2018-04-25 16:24:07,967 INFO [Thread-84] (EmployeeService.java:65) - tryTimes: 1

60 2018-04-25 16:24:07,974 INFO [Thread-16] (EmployeeService.java:77) - oldMoney: 116

61 2018-04-25 16:24:07,974 INFO [Thread-17] (EmployeeService.java:77) - oldMoney: 116

62 2018-04-25 16:24:07,974 INFO [Thread-89] (EmployeeService.java:77) - oldMoney: 116

63 2018-04-25 16:24:07,975 INFO [Thread-13] (EmployeeService.java:77) - oldMoney: 116

64 2018-04-25 16:24:07,976 INFO [Thread-7] (EmployeeService.java:77) - oldMoney: 116

65 2018-04-25 16:24:07,976 INFO [Thread-100] (EmployeeService.java:77) - oldMoney: 116

66 2018-04-25 16:24:07,976 INFO [Thread-95] (EmployeeService.java:77) - oldMoney: 116

67 2018-04-25 16:24:07,978 INFO [Thread-88] (EmployeeService.java:77) - oldMoney: 116

68 2018-04-25 16:24:07,978 INFO [Thread-8] (EmployeeService.java:77) - oldMoney: 117

69 2018-04-25 16:24:07,979 INFO [Thread-11] (EmployeeService.java:77) - oldMoney: 117

70 2018-04-25 16:24:07,980 INFO [Thread-5] (EmployeeService.java:77) - oldMoney: 118

71 2018-04-25 16:24:07,980 INFO [Thread-19] (EmployeeService.java:77) - oldMoney: 118

72 2018-04-25 16:24:07,980 INFO [Thread-22] (EmployeeService.java:77) - oldMoney: 118

73 2018-04-25 16:24:07,981 INFO [Thread-2] (EmployeeService.java:77) - oldMoney: 119

74 2018-04-25 16:24:07,981 INFO [Thread-23] (EmployeeService.java:77) - oldMoney: 119

75 2018-04-25 16:24:07,982 INFO [Thread-35] (EmployeeService.java:77) - oldMoney: 119

76 2018-04-25 16:24:07,982 INFO [Thread-32] (EmployeeService.java:77) - oldMoney: 119

77 2018-04-25 16:24:07,983 INFO [Thread-34] (EmployeeService.java:77) - oldMoney: 120

78 2018-04-25 16:24:07,983 INFO [Thread-37] (EmployeeService.java:77) - oldMoney: 120

79 2018-04-25 16:24:07,984 INFO [Thread-38] (EmployeeService.java:77) - oldMoney: 120

80 2018-04-25 16:24:07,985 INFO [Thread-39] (EmployeeService.java:77) - oldMoney: 121

81 2018-04-25 16:24:07,985 INFO [Thread-40] (EmployeeService.java:77) - oldMoney: 121

82 2018-04-25 16:24:07,986 INFO [Thread-41] (EmployeeService.java:77) - oldMoney: 121

83 2018-04-25 16:24:07,986 INFO [Thread-43] (EmployeeService.java:77) - oldMoney: 121

84 2018-04-25 16:24:07,987 INFO [Thread-44] (EmployeeService.java:77) - oldMoney: 122

85 2018-04-25 16:24:07,988 INFO [Thread-48] (EmployeeService.java:77) - oldMoney: 122

86 2018-04-25 16:24:07,988 INFO [Thread-49] (EmployeeService.java:77) - oldMoney: 122

87 2018-04-25 16:24:07,989 INFO [Thread-50] (EmployeeService.java:77) - oldMoney: 122

88 2018-04-25 16:24:07,986 INFO [Thread-42] (EmployeeService.java:77) - oldMoney: 121

89 2018-04-25 16:24:07,990 INFO [Thread-52] (EmployeeService.java:77) - oldMoney: 123

90 2018-04-25 16:24:07,989 INFO [Thread-51] (EmployeeService.java:77) - oldMoney: 122

91 2018-04-25 16:24:07,988 INFO [Thread-47] (EmployeeService.java:77) - oldMoney: 122

92 2018-04-25 16:24:07,987 INFO [Thread-46] (EmployeeService.java:77) - oldMoney: 122

93 2018-04-25 16:24:07,991 INFO [Thread-60] (EmployeeService.java:77) - oldMoney: 123

94 2018-04-25 16:24:07,990 INFO [Thread-58] (EmployeeService.java:77) - oldMoney: 123

95 2018-04-25 16:24:07,992 INFO [Thread-64] (EmployeeService.java:77) - oldMoney: 124

96 2018-04-25 16:24:07,992 INFO [Thread-65] (EmployeeService.java:77) - oldMoney: 124

97 2018-04-25 16:24:07,992 INFO [Thread-61] (EmployeeService.java:77) - oldMoney: 124

98 2018-04-25 16:24:07,993 INFO [Thread-63] (EmployeeService.java:77) - oldMoney: 125

99 2018-04-25 16:24:07,995 INFO [Thread-68] (EmployeeService.java:77) - oldMoney: 125

100 2018-04-25 16:24:07,995 INFO [Thread-67] (EmployeeService.java:77) - oldMoney: 125

101 2018-04-25 16:24:07,995 INFO [Thread-15] (EmployeeService.java:77) - oldMoney: 125

102 2018-04-25 16:24:07,996 INFO [Thread-66] (EmployeeService.java:77) - oldMoney: 125

103 2018-04-25 16:24:07,997 INFO [Thread-99] (EmployeeService.java:77) - oldMoney: 126

104 2018-04-25 16:24:07,998 INFO [Thread-98] (EmployeeService.java:77) - oldMoney: 126

105 2018-04-25 16:24:07,998 INFO [Thread-74] (EmployeeService.java:77) - oldMoney: 126

106 2018-04-25 16:24:08,002 INFO [Thread-92] (EmployeeService.java:65) - tryTimes: 1

107 2018-04-25 16:24:08,002 INFO [Thread-73] (EmployeeService.java:77) - oldMoney: 127

108 2018-04-25 16:24:08,002 INFO [Thread-18] (EmployeeService.java:65) - tryTimes: 1

109 2018-04-25 16:24:08,004 INFO [Thread-62] (EmployeeService.java:77) - oldMoney: 127

110 2018-04-25 16:24:08,004 INFO [Thread-27] (EmployeeService.java:77) - oldMoney: 127

111 2018-04-25 16:24:08,005 INFO [Thread-46] (EmployeeService.java:77) - oldMoney: 128

112 2018-04-25 16:24:08,006 INFO [Thread-59] (EmployeeService.java:77) - oldMoney: 128

113 2018-04-25 16:24:08,006 INFO [Thread-71] (EmployeeService.java:77) - oldMoney: 128

114 2018-04-25 16:24:08,006 INFO [Thread-3] (EmployeeService.java:77) - oldMoney: 128

115 2018-04-25 16:24:08,007 INFO [Thread-56] (EmployeeService.java:77) - oldMoney: 128

116 2018-04-25 16:24:08,008 INFO [Thread-72] (EmployeeService.java:77) - oldMoney: 128

117 2018-04-25 16:24:08,008 INFO [Thread-93] (EmployeeService.java:65) - tryTimes: 1

118 2018-04-25 16:24:08,010 INFO [Thread-70] (EmployeeService.java:77) - oldMoney: 129

119 2018-04-25 16:24:08,010 INFO [Thread-10] (EmployeeService.java:77) - oldMoney: 129

120 2018-04-25 16:24:08,010 INFO [Thread-17] (EmployeeService.java:77) - oldMoney: 129

121 2018-04-25 16:24:08,011 INFO [Thread-14] (EmployeeService.java:77) - oldMoney: 129

122 2018-04-25 16:24:08,012 INFO [Thread-1] (EmployeeService.java:77) - oldMoney: 130

123 2018-04-25 16:24:08,032 INFO [Thread-5] (EmployeeService.java:65) - tryTimes: 1

124 2018-04-25 16:24:08,032 INFO [Thread-49] (EmployeeService.java:65) - tryTimes: 1

125 2018-04-25 16:24:08,032 INFO [Thread-87] (EmployeeService.java:65) - tryTimes: 1

126 2018-04-25 16:24:08,032 INFO [Thread-64] (EmployeeService.java:65) - tryTimes: 1

127 2018-04-25 16:24:08,032 INFO [Thread-8] (EmployeeService.java:65) - tryTimes: 1

128 2018-04-25 16:24:08,033 INFO [Thread-41] (EmployeeService.java:65) - tryTimes: 1

129 2018-04-25 16:24:08,033 INFO [Thread-52] (EmployeeService.java:65) - tryTimes: 1

130 2018-04-25 16:24:08,034 INFO [Thread-2] (EmployeeService.java:65) - tryTimes: 1

131 2018-04-25 16:24:08,034 INFO [Thread-72] (EmployeeService.java:77) - oldMoney: 131

132 2018-04-25 16:24:08,035 INFO [Thread-99] (EmployeeService.java:65) - tryTimes: 1

133 2018-04-25 16:24:08,035 INFO [Thread-34] (EmployeeService.java:65) - tryTimes: 1

134 2018-04-25 16:24:08,035 INFO [Thread-68] (EmployeeService.java:65) - tryTimes: 1

135 2018-04-25 16:24:08,037 INFO [Thread-30] (EmployeeService.java:77) - oldMoney: 131

136 2018-04-25 16:24:08,049 INFO [Thread-30] (EmployeeService.java:77) - oldMoney: 132

137 2018-04-25 16:24:08,068 INFO [Thread-3] (EmployeeService.java:65) - tryTimes: 1

138 2018-04-25 16:24:08,068 INFO [Thread-10] (EmployeeService.java:65) - tryTimes: 1

139 2018-04-25 16:24:08,068 INFO [Thread-73] (EmployeeService.java:65) - tryTimes: 1

140 2018-04-25 16:24:08,068 INFO [Thread-1] (EmployeeService.java:65) - tryTimes: 1

141 2018-04-25 16:24:08,070 INFO [Thread-24] (EmployeeService.java:77) - oldMoney: 133

142 2018-04-25 16:24:08,082 INFO [Thread-69] (EmployeeService.java:77) - oldMoney: 134

143 2018-04-25 16:24:08,087 INFO [Thread-60] (EmployeeService.java:77) - oldMoney: 135

144 2018-04-25 16:24:08,117 INFO [Thread-38] (EmployeeService.java:77) - oldMoney: 136

145 2018-04-25 16:24:08,125 INFO [Thread-46] (EmployeeService.java:77) - oldMoney: 137

146 2018-04-25 16:24:08,131 INFO [Thread-30] (EmployeeService.java:65) - tryTimes: 3

147 2018-04-25 16:24:08,132 INFO [Thread-72] (EmployeeService.java:65) - tryTimes: 2

148 2018-04-25 16:24:08,149 INFO [Thread-11] (EmployeeService.java:77) - oldMoney: 138

149 2018-04-25 16:24:08,170 INFO [Thread-98] (EmployeeService.java:77) - oldMoney: 139

150 2018-04-25 16:24:08,180 INFO [Thread-60] (EmployeeService.java:65) - tryTimes: 2

151 2018-04-25 16:24:08,181 INFO [Thread-46] (EmployeeService.java:65) - tryTimes: 3

152 2018-04-25 16:24:08,180 INFO [Thread-69] (EmployeeService.java:65) - tryTimes: 2

153 2018-04-25 16:24:08,180 INFO [Thread-38] (EmployeeService.java:65) - tryTimes: 2

154 2018-04-25 16:24:08,180 INFO [Thread-24] (EmployeeService.java:65) - tryTimes: 2

155 2018-04-25 16:24:08,188 INFO [Thread-71] (EmployeeService.java:77) - oldMoney: 140

156 2018-04-25 16:24:08,204 INFO [Thread-96] (EmployeeService.java:77) - oldMoney: 141

157 2018-04-25 16:24:08,210 INFO [Thread-11] (EmployeeService.java:65) - tryTimes: 2

158 2018-04-25 16:24:08,210 INFO [Thread-98] (EmployeeService.java:65) - tryTimes: 2

159 2018-04-25 16:24:08,230 INFO [Thread-91] (EmployeeService.java:77) - oldMoney: 142

160 2018-04-25 16:24:08,239 INFO [Thread-71] (EmployeeService.java:65) - tryTimes: 2

161 2018-04-25 16:24:08,239 INFO [Thread-96] (EmployeeService.java:65) - tryTimes: 2

162 2018-04-25 16:24:08,254 INFO [Thread-25] (EmployeeService.java:77) - oldMoney: 143

163 2018-04-25 16:24:08,254 INFO [Thread-58] (EmployeeService.java:77) - oldMoney: 143

164 2018-04-25 16:24:08,263 INFO [Thread-17] (EmployeeService.java:77) - oldMoney: 144

165 2018-04-25 16:24:08,268 INFO [Thread-91] (EmployeeService.java:65) - tryTimes: 2

166 2018-04-25 16:24:08,275 INFO [Thread-63] (EmployeeService.java:77) - oldMoney: 145

167 2018-04-25 16:24:08,275 INFO [Thread-89] (EmployeeService.java:77) - oldMoney: 145

168 2018-04-25 16:24:08,277 INFO [Thread-51] (EmployeeService.java:77) - oldMoney: 146

169 2018-04-25 16:24:08,279 INFO [Thread-56] (EmployeeService.java:77) - oldMoney: 147

170 2018-04-25 16:24:08,280 INFO [Thread-40] (EmployeeService.java:77) - oldMoney: 147

171 2018-04-25 16:24:08,280 INFO [Thread-65] (EmployeeService.java:77) - oldMoney: 147

172 2018-04-25 16:24:08,287 INFO [Thread-100] (EmployeeService.java:77) - oldMoney: 148

173 2018-04-25 16:24:08,298 INFO [Thread-25] (EmployeeService.java:65) - tryTimes: 2

174 2018-04-25 16:24:08,299 INFO [Thread-17] (EmployeeService.java:65) - tryTimes: 3

175 2018-04-25 16:24:08,310 INFO [Thread-47] (EmployeeService.java:77) - oldMoney: 149

176 2018-04-25 16:24:08,319 INFO [Thread-6] (EmployeeService.java:77) - oldMoney: 150

177 2018-04-25 16:24:08,327 INFO [Thread-100] (EmployeeService.java:65) - tryTimes: 2

178 2018-04-25 16:24:08,327 INFO [Thread-56] (EmployeeService.java:65) - tryTimes: 3

179 2018-04-25 16:24:08,327 INFO [Thread-63] (EmployeeService.java:65) - tryTimes: 2

180 2018-04-25 16:24:08,328 INFO [Thread-51] (EmployeeService.java:65) - tryTimes: 2

181 2018-04-25 16:24:08,364 INFO [Thread-6] (EmployeeService.java:65) - tryTimes: 3

182 2018-04-25 16:24:08,365 INFO [Thread-47] (EmployeeService.java:65) - tryTimes: 2

183 2018-04-25 16:24:08,388 INFO [Thread-33] (EmployeeService.java:77) - oldMoney: 151

184 2018-04-25 16:24:08,400 INFO [Thread-58] (EmployeeService.java:77) - oldMoney: 152

185 2018-04-25 16:24:08,404 INFO [Thread-35] (EmployeeService.java:77) - oldMoney: 153

186 2018-04-25 16:24:08,424 INFO [Thread-89] (EmployeeService.java:77) - oldMoney: 154

187 2018-04-25 16:24:08,427 INFO [Thread-33] (EmployeeService.java:65) - tryTimes: 3

188 2018-04-25 16:24:08,431 INFO [Thread-88] (EmployeeService.java:77) - oldMoney: 155

189 2018-04-25 16:24:08,453 INFO [Thread-12] (EmployeeService.java:77) - oldMoney: 156

190 2018-04-25 16:24:08,454 INFO [Thread-70] (EmployeeService.java:77) - oldMoney: 157

191 2018-04-25 16:24:08,457 INFO [Thread-89] (EmployeeService.java:65) - tryTimes: 3

192 2018-04-25 16:24:08,457 INFO [Thread-58] (EmployeeService.java:65) - tryTimes: 3

193 2018-04-25 16:24:08,458 INFO [Thread-35] (EmployeeService.java:65) - tryTimes: 2

194 2018-04-25 16:24:08,459 INFO [Thread-54] (EmployeeService.java:77) - oldMoney: 158

195 2018-04-25 16:24:08,461 INFO [Thread-67] (EmployeeService.java:77) - oldMoney: 159

196 2018-04-25 16:24:08,470 INFO [Thread-31] (EmployeeService.java:77) - oldMoney: 160

197 2018-04-25 16:24:08,485 INFO [Thread-12] (EmployeeService.java:65) - tryTimes: 2

198 2018-04-25 16:24:08,485 INFO [Thread-70] (EmployeeService.java:65) - tryTimes: 2

199 2018-04-25 16:24:08,486 INFO [Thread-88] (EmployeeService.java:65) - tryTimes: 2

200 2018-04-25 16:24:08,488 INFO [Thread-81] (EmployeeService.java:77) - oldMoney: 161

201 2018-04-25 16:24:08,497 INFO [Thread-23] (EmployeeService.java:77) - oldMoney: 162

202 2018-04-25 16:24:08,504 INFO [Thread-82] (EmployeeService.java:77) - oldMoney: 163

203 2018-04-25 16:24:08,507 INFO [Thread-50] (EmployeeService.java:77) - oldMoney: 164

204 2018-04-25 16:24:08,510 INFO [Thread-78] (EmployeeService.java:77) - oldMoney: 165

205 2018-04-25 16:24:08,514 INFO [Thread-67] (EmployeeService.java:65) - tryTimes: 2

206 2018-04-25 16:24:08,514 INFO [Thread-54] (EmployeeService.java:65) - tryTimes: 2

207 2018-04-25 16:24:08,516 INFO [Thread-97] (EmployeeService.java:77) - oldMoney: 166

208 2018-04-25 16:24:08,517 INFO [Thread-31] (EmployeeService.java:65) - tryTimes: 2

209 2018-04-25 16:24:08,534 INFO [Thread-61] (EmployeeService.java:77) - oldMoney: 167

210 2018-04-25 16:24:08,538 INFO [Thread-29] (EmployeeService.java:77) - oldMoney: 168

211 2018-04-25 16:24:08,543 INFO [Thread-23] (EmployeeService.java:65) - tryTimes: 2

212 2018-04-25 16:24:08,544 INFO [Thread-81] (EmployeeService.java:65) - tryTimes: 2

213 2018-04-25 16:24:08,544 INFO [Thread-50] (EmployeeService.java:65) - tryTimes: 2

214 2018-04-25 16:24:08,543 INFO [Thread-82] (EmployeeService.java:65) - tryTimes: 2

215 2018-04-25 16:24:08,544 INFO [Thread-78] (EmployeeService.java:65) - tryTimes: 2

216 2018-04-25 16:24:08,556 INFO [Thread-74] (EmployeeService.java:77) - oldMoney: 169

217 2018-04-25 16:24:08,572 INFO [Thread-61] (EmployeeService.java:65) - tryTimes: 2

218 2018-04-25 16:24:08,573 INFO [Thread-29] (EmployeeService.java:65) - tryTimes: 2

219 2018-04-25 16:24:08,572 INFO [Thread-97] (EmployeeService.java:65) - tryTimes: 2

220 2018-04-25 16:24:08,582 INFO [Thread-80] (EmployeeService.java:77) - oldMoney: 170

221 2018-04-25 16:24:08,583 INFO [Thread-48] (EmployeeService.java:77) - oldMoney: 171

222 2018-04-25 16:24:08,584 INFO [Thread-27] (EmployeeService.java:77) - oldMoney: 172

223 2018-04-25 16:24:08,589 INFO [Thread-32] (EmployeeService.java:77) - oldMoney: 173

224 2018-04-25 16:24:08,602 INFO [Thread-74] (EmployeeService.java:65) - tryTimes: 2

225 2018-04-25 16:24:08,608 INFO [Thread-85] (EmployeeService.java:77) - oldMoney: 174

226 2018-04-25 16:24:08,631 INFO [Thread-32] (EmployeeService.java:65) - tryTimes: 2

227 2018-04-25 16:24:08,631 INFO [Thread-27] (EmployeeService.java:65) - tryTimes: 3

228 2018-04-25 16:24:08,631 INFO [Thread-80] (EmployeeService.java:65) - tryTimes: 2

229 2018-04-25 16:24:08,632 INFO [Thread-48] (EmployeeService.java:65) - tryTimes: 2

230 2018-04-25 16:24:08,634 INFO [Thread-22] (EmployeeService.java:77) - oldMoney: 175

231 2018-04-25 16:24:08,660 INFO [Thread-85] (EmployeeService.java:65) - tryTimes: 2

232 2018-04-25 16:24:08,689 INFO [Thread-22] (EmployeeService.java:65) - tryTimes: 2

233 2018-04-25 16:24:08,696 INFO [Thread-44] (EmployeeService.java:77) - oldMoney: 176

234 2018-04-25 16:24:08,696 INFO [Thread-43] (EmployeeService.java:77) - oldMoney: 176

235 2018-04-25 16:24:08,704 INFO [Thread-13] (EmployeeService.java:77) - oldMoney: 177

236 2018-04-25 16:24:08,712 INFO [Thread-4] (EmployeeService.java:77) - oldMoney: 178

237 2018-04-25 16:24:08,722 INFO [Thread-45] (EmployeeService.java:77) - oldMoney: 179

238 2018-04-25 16:24:08,723 INFO [Thread-7] (EmployeeService.java:77) - oldMoney: 179

239 2018-04-25 16:24:08,727 INFO [Thread-44] (EmployeeService.java:65) - tryTimes: 2

240 2018-04-25 16:24:08,743 INFO [Thread-77] (EmployeeService.java:77) - oldMoney: 180

241 2018-04-25 16:24:08,748 INFO [Thread-59] (EmployeeService.java:77) - oldMoney: 181

242 2018-04-25 16:24:08,754 INFO [Thread-57] (EmployeeService.java:77) - oldMoney: 182

243 2018-04-25 16:24:08,756 INFO [Thread-45] (EmployeeService.java:65) - tryTimes: 2

244 2018-04-25 16:24:08,756 INFO [Thread-13] (EmployeeService.java:65) - tryTimes: 2

245 2018-04-25 16:24:08,757 INFO [Thread-4] (EmployeeService.java:65) - tryTimes: 2

246 2018-04-25 16:24:08,765 INFO [Thread-39] (EmployeeService.java:77) - oldMoney: 183

247 2018-04-25 16:24:08,779 INFO [Thread-66] (EmployeeService.java:77) - oldMoney: 184

248 2018-04-25 16:24:08,785 INFO [Thread-59] (EmployeeService.java:65) - tryTimes: 2

249 2018-04-25 16:24:08,785 INFO [Thread-77] (EmployeeService.java:65) - tryTimes: 2

250 2018-04-25 16:24:08,796 INFO [Thread-55] (EmployeeService.java:77) - oldMoney: 185

251 2018-04-25 16:24:08,811 INFO [Thread-62] (EmployeeService.java:77) - oldMoney: 186

252 2018-04-25 16:24:08,814 INFO [Thread-39] (EmployeeService.java:65) - tryTimes: 2

253 2018-04-25 16:24:08,814 INFO [Thread-57] (EmployeeService.java:65) - tryTimes: 2

254 2018-04-25 16:24:08,814 INFO [Thread-66] (EmployeeService.java:65) - tryTimes: 2

255 2018-04-25 16:24:08,827 INFO [Thread-94] (EmployeeService.java:77) - oldMoney: 187

256 2018-04-25 16:24:08,840 INFO [Thread-53] (EmployeeService.java:77) - oldMoney: 188

257 2018-04-25 16:24:08,840 INFO [Thread-95] (EmployeeService.java:77) - oldMoney: 188

258 2018-04-25 16:24:08,843 INFO [Thread-62] (EmployeeService.java:65) - tryTimes: 2

259 2018-04-25 16:24:08,843 INFO [Thread-55] (EmployeeService.java:65) - tryTimes: 2

260 2018-04-25 16:24:08,857 INFO [Thread-37] (EmployeeService.java:77) - oldMoney: 189

261 2018-04-25 16:24:08,872 INFO [Thread-94] (EmployeeService.java:65) - tryTimes: 2

262 2018-04-25 16:24:08,872 INFO [Thread-53] (EmployeeService.java:65) - tryTimes: 2

263 2018-04-25 16:24:08,887 INFO [Thread-15] (EmployeeService.java:77) - oldMoney: 190

264 2018-04-25 16:24:08,891 INFO [Thread-16] (EmployeeService.java:77) - oldMoney: 191

265 2018-04-25 16:24:08,902 INFO [Thread-37] (EmployeeService.java:65) - tryTimes: 2

266 2018-04-25 16:24:08,909 INFO [Thread-14] (EmployeeService.java:77) - oldMoney: 192

267 2018-04-25 16:24:08,931 INFO [Thread-16] (EmployeeService.java:65) - tryTimes: 2

268 2018-04-25 16:24:08,931 INFO [Thread-15] (EmployeeService.java:65) - tryTimes: 2

269 2018-04-25 16:24:08,960 INFO [Thread-14] (EmployeeService.java:65) - tryTimes: 2

270 2018-04-25 16:24:08,964 INFO [Thread-65] (EmployeeService.java:77) - oldMoney: 193

271 2018-04-25 16:24:08,965 INFO [Thread-42] (EmployeeService.java:77) - oldMoney: 194

272 2018-04-25 16:24:08,970 INFO [Thread-19] (EmployeeService.java:77) - oldMoney: 195

273 2018-04-25 16:24:08,989 INFO [Thread-65] (EmployeeService.java:65) - tryTimes: 3

274 2018-04-25 16:24:09,018 INFO [Thread-42] (EmployeeService.java:65) - tryTimes: 2

275 2018-04-25 16:24:09,018 INFO [Thread-19] (EmployeeService.java:65) - tryTimes: 2

276 2018-04-25 16:24:09,025 INFO [Thread-40] (EmployeeService.java:77) - oldMoney: 196

277 2018-04-25 16:24:09,056 INFO [Thread-40] (EmployeeService.java:65) - tryTimes: 3

278 2018-04-25 16:24:09,318 INFO [Thread-43] (EmployeeService.java:77) - oldMoney: 197

279 2018-04-25 16:24:09,352 INFO [Thread-43] (EmployeeService.java:65) - tryTimes: 3

280 2018-04-25 16:24:09,433 INFO [Thread-7] (EmployeeService.java:77) - oldMoney: 198

281 2018-04-25 16:24:09,473 INFO [Thread-7] (EmployeeService.java:65) - tryTimes: 3

282 2018-04-25 16:24:09,578 INFO [Thread-95] (EmployeeService.java:77) - oldMoney: 199

283 2018-04-25 16:24:09,627 INFO [Thread-95] (EmployeeService.java:65) - tryTimes: 3

View Code

可以看到，还是有一些线程会拿到相同的值，但是由于版本控制使得最终只有一根线程能够更新成功，其它更新失败的线程会继续尝试，最终能更新成功。

第三部分 总结&对比

悲观锁

乐观锁

概念

查询时直接锁住记录使得其它事务不能查询，更不能更新

提交更新时检查版本或者时间戳是否符合

语法

select ... for update

使用 version 或者 timestamp 进行比较

实现者

数据库本身

开发者

适用场景

并发量大

并发量小

类比Java

Synchronized关键字

CAS 算法

鲁班鲁饶
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