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SpringBoot 1 Connect to the database The Spring framework helps you connect to databases by connecting from JDBC to mapping elements using JdbcTemplate.For example, Hibernate and Spring Data provide higher-level functionality, create an implementation of Repository, and use methods in the interface and mapping of specific SQL from xml files to ...

[TOC] I. Pattern Definition The template method pattern defines some skeleton methods in an abstract class, and then defers some methods to the inherited class through the method of class inheritance. Template method pattern is a kind of behavioral pattern, and it is a common method. It does not belong to the object behavioral patt ...

There is a problem in our daily operation of the database. We need to establish a database connection for each data operation request. Every time a connection is established, it takes a lot of overhead, such as loading the driver class, registering the driver, and getting the connection. If the connection is made several times i ...

Article directory Classification of GoF Design Patterns 1.1 Creative 1.2 Structural Type 1.3 Behavioral Type II. Overview of Design Principles 2.1 Summary of Object-Oriented Design Principles: 2.2 Single Responsibility Principle 2.3 Open-Close Principle 2.4 Richter Substitution Principle 2.5 Dependence on reversal principl ...

I. Preparations Import the corresponding jdbc.jar package: Right-click in the current project, select Build Path, and select Configure Build Path. Under the Libraries tab, click Add External JARS on the right and select the appropriate jar package. JDBC connection sql sever2012: https://pan.baidu.com/disk/home?errno=0&e ...

1. Trampling Records in Spring Use image Spring uses multiple data sources through annotations Pit: @Autowire is automatically injected by byType, while @Resource is automatically injected by byName by default, @Primary is the preferred choice. For example, in a project there are two Redis sources, dataRedisTemplate and red ...

SpringBook Advanced Paper JdbcTemplate Data Query Part I This paper describes how to use JdbcTemplate to perform simple query operations. It mainly introduces the invocation postures of three methods: queryForMap, queryForList and queryForObject. queryForRowSet query <!-- more --> I. Environmental preparation The environment is still co ...

BS53 project uses java reflection to get custom controls, then instantiates them and displays them on the page. It realizes that only one configuration file is needed to display the whole page, and supports different configurations in 5 styles. Basically all depends on reflection technology. Now let's take a brief look at reflection technology ...

After learning about JDBC and database operations, it is obvious that writing JDBC code is not an easy task. In order to help us learn more efficiently and get rid of the heavy code of JDBC, Tong gave us a detailed introduction to a component that simplifies JDBC operations, DBUtils. Today we have mainly studied the two classes and an inter ...

Introduction The last blog summarized the core components of the mybatis framework. This blog summarized the elements of the mybatis core configuration file and the role of the configuration elements. Summary Mybatis implements ORM mapping through core configuration files, commonly named mybatis-config.xml. There are many elements in this co ...