Java

IO flow —— Classification of flow ,InputStream,OutputStream,Reader,Writer etc.

one ,IO Flow overview flow classification 1. Operational data unit ： Byte stream , Character stream 2. Data flow ： Input stream , Output stream 3....
2020-07-19 14:44 views 43

Database connection encryption （SpringBoot+jasypt encryption ）

  SpringBoot The project often puts the password plaintext for connecting to the database in the configuration file , The security is lower , Espec...
2020-07-18 21:48 views 135

Madness theory java Study notes ---JAVA Basic grammar

JAVA Basic grammar notes , identifier , Keyword data type conversion variable , Constant operator package mechanism ,JavaDoc We usually write code...
2020-07-11 10:28 views 31

2020Java Practical training （ Student information management system ）

Java Training program ： When the teacher of the first training class introduced the training items, I felt that there were many contents , At the s...
2020-07-07 16:55 views 25

Six years Java Programmer turns to duck

Recently, I saw a picture in the group , A programmer changed his profession to buy ducks . The real inside story of programmers , Outsiders look ...
2020-06-24 16:46 views 21

solve Spring/SpringBoot @RequestParam The annotation cannot be read application/json Format data .

Emmmm… I'm on my way to a project recently , When a method needs to receive only one or fewer parameters, it is too lazy to write entity classes to...
2020-06-22 18:44 views 54

Java What are the three major technology platforms ? Finish learning Java What can you do ?

Java What are the three major technology platforms ? Finish learning Java What can you do ? Let's have a look with Qianfeng Guangzhou Xiaobian !Jav...
2020-06-18 15:45 views 19

Failed to bind properties under server.address to java.net.InetAddress

report errors 2020-06-14 22:14:46.251 ERROR 20640 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter : ***************************APPL...
2020-06-14 22:18 views 427

thread —— Creation method , common method , Thread safety , signal communication

one , Common methods of thread * 1. start(): Start the current thread ; Call the run() * 2. run(): It usually needs to be rewritten Thread Class...
2020-06-13 00:41 views 33

synchronized Fair lock or unfair lock

synchronized Fair lock or unfair lock
2020-06-09 14:30 views 62
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