Programmer Group

catalogue Environment construction database Create Maven project Configuration item Write project Create package structure Writing back-end code pojo package util package   service package serviceimpl package controller package Create front-end display page Possible problems Tomcat startup failed. Garbled code problem We ...

IDEA remote deployment debugging Java application Basic overview In our work, we may encounter that we cannot connect to the development environment database and other resources locally, but we want to develop and debug directly locally. At this time, it can be realized through the Run on... Function of IDEA. The principle is to connect ...

1. Introduction Environmental description: jdk 8 + MySQL 5.7.19 maven-3.6.1 IDEA Before learning, you need to master: JDBC MySQL Java Foundation Maven Junit What is MyBatis MyBatis is an excellent persistence layer framework MyBatis avoids almost all JDBC code and the process of manually setting parameters and obtaining result set ...

2.IOC container 1.IOC container 1. What is IOC (control reversal) (1) leave the object creation and the calling process between objects to Spring for management (2) purpose of using IOC: to reduce the coupling degree (3) People's case is IOC implementation 2.IOC underlying principle xml parsing, factory schema, reflection (1) .xml parsin ...

DI: assign values to attributes spring calls the parameterless construction method of the class to create an object. Assign a value to the property after the object is created. To assign a value to an attribute, you can use: Tags and attributes in xml configuration filesUsing annotations DI classification: Set injection is also called set ...