Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly
Sign up
Appearance settings

Commit 508d3c9

Browse files
优化内容
0 parents commit 508d3c9

File tree

182 files changed

+8256
-0
lines changed

Some content is hidden

Large Commits have some content hidden by default. Use the searchbox below for content that may be hidden.

182 files changed

+8256
-0
lines changed

‎.DS_Store

6 KB
Binary file not shown.

‎.gitignore

Lines changed: 26 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,26 @@
1+
# Compiled class file
2+
*.class
3+
4+
# Log file
5+
*.log
6+
7+
# BlueJ files
8+
*.ctxt
9+
10+
# Mobile Tools for Java (J2ME)
11+
.mtj.tmp/
12+
13+
# Package Files #
14+
*.jar
15+
*.war
16+
*.ear
17+
*.zip
18+
*.tar.gz
19+
*.rar
20+
21+
# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
22+
hs_err_pid*
23+
24+
/.idea/
25+
/target/
26+
/*.iml

‎LICENSE

Lines changed: 201 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,201 @@
1+
Apache License
2+
Version 2.0, January 2004
3+
http://www.apache.org/licenses/
4+
5+
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
6+
7+
1. Definitions.
8+
9+
"License" shall mean the terms and conditions for use, reproduction,
10+
and distribution as defined by Sections 1 through 9 of this document.
11+
12+
"Licensor" shall mean the copyright owner or entity authorized by
13+
the copyright owner that is granting the License.
14+
15+
"Legal Entity" shall mean the union of the acting entity and all
16+
other entities that control, are controlled by, or are under common
17+
control with that entity. For the purposes of this definition,
18+
"control" means (i) the power, direct or indirect, to cause the
19+
direction or management of such entity, whether by contract or
20+
otherwise, or (ii) ownership of fifty percent (50%) or more of the
21+
outstanding shares, or (iii) beneficial ownership of such entity.
22+
23+
"You" (or "Your") shall mean an individual or Legal Entity
24+
exercising permissions granted by this License.
25+
26+
"Source" form shall mean the preferred form for making modifications,
27+
including but not limited to software source code, documentation
28+
source, and configuration files.
29+
30+
"Object" form shall mean any form resulting from mechanical
31+
transformation or translation of a Source form, including but
32+
not limited to compiled object code, generated documentation,
33+
and conversions to other media types.
34+
35+
"Work" shall mean the work of authorship, whether in Source or
36+
Object form, made available under the License, as indicated by a
37+
copyright notice that is included in or attached to the work
38+
(an example is provided in the Appendix below).
39+
40+
"Derivative Works" shall mean any work, whether in Source or Object
41+
form, that is based on (or derived from) the Work and for which the
42+
editorial revisions, annotations, elaborations, or other modifications
43+
represent, as a whole, an original work of authorship. For the purposes
44+
of this License, Derivative Works shall not include works that remain
45+
separable from, or merely link (or bind by name) to the interfaces of,
46+
the Work and Derivative Works thereof.
47+
48+
"Contribution" shall mean any work of authorship, including
49+
the original version of the Work and any modifications or additions
50+
to that Work or Derivative Works thereof, that is intentionally
51+
submitted to Licensor for inclusion in the Work by the copyright owner
52+
or by an individual or Legal Entity authorized to submit on behalf of
53+
the copyright owner. For the purposes of this definition, "submitted"
54+
means any form of electronic, verbal, or written communication sent
55+
to the Licensor or its representatives, including but not limited to
56+
communication on electronic mailing lists, source code control systems,
57+
and issue tracking systems that are managed by, or on behalf of, the
58+
Licensor for the purpose of discussing and improving the Work, but
59+
excluding communication that is conspicuously marked or otherwise
60+
designated in writing by the copyright owner as "Not a Contribution."
61+
62+
"Contributor" shall mean Licensor and any individual or Legal Entity
63+
on behalf of whom a Contribution has been received by Licensor and
64+
subsequently incorporated within the Work.
65+
66+
2. Grant of Copyright License. Subject to the terms and conditions of
67+
this License, each Contributor hereby grants to You a perpetual,
68+
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
69+
copyright license to reproduce, prepare Derivative Works of,
70+
publicly display, publicly perform, sublicense, and distribute the
71+
Work and such Derivative Works in Source or Object form.
72+
73+
3. Grant of Patent License. Subject to the terms and conditions of
74+
this License, each Contributor hereby grants to You a perpetual,
75+
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
76+
(except as stated in this section) patent license to make, have made,
77+
use, offer to sell, sell, import, and otherwise transfer the Work,
78+
where such license applies only to those patent claims licensable
79+
by such Contributor that are necessarily infringed by their
80+
Contribution(s) alone or by combination of their Contribution(s)
81+
with the Work to which such Contribution(s) was submitted. If You
82+
institute patent litigation against any entity (including a
83+
cross-claim or counterclaim in a lawsuit) alleging that the Work
84+
or a Contribution incorporated within the Work constitutes direct
85+
or contributory patent infringement, then any patent licenses
86+
granted to You under this License for that Work shall terminate
87+
as of the date such litigation is filed.
88+
89+
4. Redistribution. You may reproduce and distribute copies of the
90+
Work or Derivative Works thereof in any medium, with or without
91+
modifications, and in Source or Object form, provided that You
92+
meet the following conditions:
93+
94+
(a) You must give any other recipients of the Work or
95+
Derivative Works a copy of this License; and
96+
97+
(b) You must cause any modified files to carry prominent notices
98+
stating that You changed the files; and
99+
100+
(c) You must retain, in the Source form of any Derivative Works
101+
that You distribute, all copyright, patent, trademark, and
102+
attribution notices from the Source form of the Work,
103+
excluding those notices that do not pertain to any part of
104+
the Derivative Works; and
105+
106+
(d) If the Work includes a "NOTICE" text file as part of its
107+
distribution, then any Derivative Works that You distribute must
108+
include a readable copy of the attribution notices contained
109+
within such NOTICE file, excluding those notices that do not
110+
pertain to any part of the Derivative Works, in at least one
111+
of the following places: within a NOTICE text file distributed
112+
as part of the Derivative Works; within the Source form or
113+
documentation, if provided along with the Derivative Works; or,
114+
within a display generated by the Derivative Works, if and
115+
wherever such third-party notices normally appear. The contents
116+
of the NOTICE file are for informational purposes only and
117+
do not modify the License. You may add Your own attribution
118+
notices within Derivative Works that You distribute, alongside
119+
or as an addendum to the NOTICE text from the Work, provided
120+
that such additional attribution notices cannot be construed
121+
as modifying the License.
122+
123+
You may add Your own copyright statement to Your modifications and
124+
may provide additional or different license terms and conditions
125+
for use, reproduction, or distribution of Your modifications, or
126+
for any such Derivative Works as a whole, provided Your use,
127+
reproduction, and distribution of the Work otherwise complies with
128+
the conditions stated in this License.
129+
130+
5. Submission of Contributions. Unless You explicitly state otherwise,
131+
any Contribution intentionally submitted for inclusion in the Work
132+
by You to the Licensor shall be under the terms and conditions of
133+
this License, without any additional terms or conditions.
134+
Notwithstanding the above, nothing herein shall supersede or modify
135+
the terms of any separate license agreement you may have executed
136+
with Licensor regarding such Contributions.
137+
138+
6. Trademarks. This License does not grant permission to use the trade
139+
names, trademarks, service marks, or product names of the Licensor,
140+
except as required for reasonable and customary use in describing the
141+
origin of the Work and reproducing the content of the NOTICE file.
142+
143+
7. Disclaimer of Warranty. Unless required by applicable law or
144+
agreed to in writing, Licensor provides the Work (and each
145+
Contributor provides its Contributions) on an "AS IS" BASIS,
146+
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
147+
implied, including, without limitation, any warranties or conditions
148+
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
149+
PARTICULAR PURPOSE. You are solely responsible for determining the
150+
appropriateness of using or redistributing the Work and assume any
151+
risks associated with Your exercise of permissions under this License.
152+
153+
8. Limitation of Liability. In no event and under no legal theory,
154+
whether in tort (including negligence), contract, or otherwise,
155+
unless required by applicable law (such as deliberate and grossly
156+
negligent acts) or agreed to in writing, shall any Contributor be
157+
liable to You for damages, including any direct, indirect, special,
158+
incidental, or consequential damages of any character arising as a
159+
result of this License or out of the use or inability to use the
160+
Work (including but not limited to damages for loss of goodwill,
161+
work stoppage, computer failure or malfunction, or any and all
162+
other commercial damages or losses), even if such Contributor
163+
has been advised of the possibility of such damages.
164+
165+
9. Accepting Warranty or Additional Liability. While redistributing
166+
the Work or Derivative Works thereof, You may choose to offer,
167+
and charge a fee for, acceptance of support, warranty, indemnity,
168+
or other liability obligations and/or rights consistent with this
169+
License. However, in accepting such obligations, You may act only
170+
on Your own behalf and on Your sole responsibility, not on behalf
171+
of any other Contributor, and only if You agree to indemnify,
172+
defend, and hold each Contributor harmless for any liability
173+
incurred by, or claims asserted against, such Contributor by reason
174+
of your accepting any such warranty or additional liability.
175+
176+
END OF TERMS AND CONDITIONS
177+
178+
APPENDIX: How to apply the Apache License to your work.
179+
180+
To apply the Apache License to your work, attach the following
181+
boilerplate notice, with the fields enclosed by brackets "[]"
182+
replaced with your own identifying information. (Don't include
183+
the brackets!) The text should be enclosed in the appropriate
184+
comment syntax for the file format. We also recommend that a
185+
file or class name and description of purpose be included on the
186+
same "printed page" as the copyright notice for easier
187+
identification within third-party archives.
188+
189+
Copyright [yyyy] [name of copyright owner]
190+
191+
Licensed under the Apache License, Version 2.0 (the "License");
192+
you may not use this file except in compliance with the License.
193+
You may obtain a copy of the License at
194+
195+
http://www.apache.org/licenses/LICENSE-2.0
196+
197+
Unless required by applicable law or agreed to in writing, software
198+
distributed under the License is distributed on an "AS IS" BASIS,
199+
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
200+
See the License for the specific language governing permissions and
201+
limitations under the License.

‎README.md

Lines changed: 78 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,78 @@
1+
## 1 目标
2+
致力于构建全球最完善的 Java 高并发理论体系。让我们的程序更加可靠,跳槽面试更轻松。
3+
4+
## 高并发方案概要
5+
6+
### 线程安全性
7+
线程安全性,主要从原子性、可见性、有序性
8+
9+
### 安全发布对象
10+
安全发布对象的一些核心方法,主要通过单例类的多种实现方式体会,这也是对线程安全性的巩固,也是把线程安全性涉及的一些关键字和类再一次放到实际场景使用。
11+
12+
### 线程安全策略
13+
线程安全策略,包括定义不可变对象、线程封闭、同步容器、并发容器等,引出并发里的关键知识J.U.C。
14+
同时还额外介绍了开发中常见的一些线程不安全类和写法,并给出他们各自对应的替代方案。
15+
16+
### AQS
17+
J.U.C的重要组件,面试必问考点。
18+
19+
AQS模型设计及相关同步组件的原理和使用,都非常实用,包括:CountDownLatch、Semaphore、CyclicBarrier、ReentrantLock与锁、Condition等。
20+
21+
这些组件需要大家能熟练明白他们的用途及差异,不但会使用,而且还要明确知道不同方法调用后的不同效果。
22+
23+
### J.U.C组件拓展
24+
25+
J.U.C相关组件,主要包括FutureTask、Fork/Join框架、BlockingQueue,其中FutureTask讲解时会对比着Callable、Runnable、Future来讲。
26+
27+
这些组件使用场景相对AQS会少一些,但也是J.U.C的重要组成部分,也是需要掌握的
28+
29+
### 线程调度-线程池
30+
new Thread弊端、线程池的好处、ThreadPoolExecutor详细介绍(参数、状态、方法)、线程池类图、Executor框架接口
31+
32+
### 多线程并发拓展
33+
死锁产生的条件及预防、多线程并发编程的最佳实践、Spring与线程安全、以及面试都特别喜欢问的HashMap和ConcurrentMap源码细节
34+
35+
### 扩容
36+
垂直扩容和水平扩容的区别,数据库读操作扩展和写操作扩展
37+
38+
### 缓存
39+
缓存特征(命中率、最大元素、清空策略)、影响缓存命中率因素、缓存分类和应用场景(本地缓存、分布式缓存)、高并发场景下缓存常见问题(缓存一致性、缓存并发、缓存穿透、雪崩)
40+
41+
### MQ
42+
消息队列的特性(业务无关、FIFO、容灾、性能)、为什么需要消息队列以及消息队列的好处(业务解耦、最终一致性、广播、错峰与流控)
43+
44+
### 应用拆分
45+
46+
### 限流
47+
明确限流的重要作用
48+
限流常用的四种算法:计数法、滑动窗口、漏桶算法和令牌桶算法
49+
50+
### 服务降级与服务熔断
51+
服务降级的分类:自动降级(超时、失败次数、故障、限流)和人工降级(开关),总结了服务降级和服务熔断的共性(目的、最终表现、粒度、自治)和区别(出发原因、管理目标层次、实现方式)以及服务降级要考虑的问题
52+
53+
### 分库分表
54+
55+
## QQ 技术交流群
56+
57+
为大家提供一个学习交流平台,在这里你可以自由地讨论技术问题。
58+
59+
<img src="assets/QQ 群.JPG" width="180px">
60+
61+
## 微信交流群
62+
<img src="assets/微信群.jpeg" width="180px">
63+
64+
### 本人微信
65+
<img src="assets/个人微信.jpeg" width="180px">
66+
67+
## Java源码模拟面试解析指南
68+
69+
<a href="https://www.nowcoder.com/tutorial/10029/index">
70+
<img src="assets/牛客专刊.png" width="80px"></a>
71+
72+
73+
### 绘图工具
74+
75+
- [draw.io](https://www.draw.io/)
76+
- keynote
77+
## 知识体系
78+
![](https://uploadfiles.nowcoder.com/files/20190815/5088755_1565799768221_4685968-76a236d781f7dee7.png)

‎assets/LOGO.png

97.7 KB
Loading[フレーム]

‎assets/QQ 群.JPG

313 KB
Loading[フレーム]

‎assets/个人微信.jpeg

183 KB
Loading[フレーム]

‎assets/公众号.png

95.3 KB
Loading[フレーム]

‎assets/微信群.jpeg

153 KB
Loading[フレーム]

‎assets/牛客专刊.png

12.9 KB
Loading[フレーム]

0 commit comments

Comments
(0)

AltStyle によって変換されたページ (->オリジナル) /