1. mvn的dependency-management
dependency-management is a statement of dependence, not actual introduction, mainly used in the parent dependent on the harmonization of the dependent version, otherwise, each sub-module in reference to the same dependent, will inevitably version confusion occurs. Similar to inheritance and class relationships rewritten
2. springboot which optimizes
@SpringBootApplication // Same, AS @Configuration @EnableAutoConfiguration @ComponentScan
1. simplify the start-up process
2 is greater than the agreed configuration simplifies the development process
3 for creating micro service
3. jdk library
java.lang: default namespace introduced in java.rt package. Comprising Integer, System, Class, Thread, Excepiton other
java.util: collection classes, time etc.
java.io: File
java.net: Network
java.security: security, encryption, etc.
4. list and set
List or the Set -> Collection -> Iterable
1 . Are interfaces, but not into repeating elements set up a null
2. List ordered repeatable
5. redis supported data types
string，hash、list、set、zset