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MyBatis supports persistent enum type properties. Suppose that there is a column of gender type varchar2(10) in the t Uuser table, which stores two values: MALE or FEMALE. In addition, the User object has a gender attribute of enum type, as follows: public enum Gender { MALE,FEMALE; }   By default, MyBatis uses EnumTypeHandler to han ...

Demand: Excel files need to be parsed, uploaded to a table in the database and downloaded. Technology: ElementUI for front-end vue, spring boot for back-end, mybatis Achieving results:   Upload implementation: 1) Field type selection The field type used to store files in the database is BLO ...

Preface Sprboot's project has not been updated for half a month since it was put down. Finally, I can write happily when I am free. Before we configure mybatis with multiple data sources, we need to do an email service. For example, when you register, you need to enter a validation code to verify. This validation code can be sent by mail. Of co ...

This article explains the integration of spring+mybatis. Directory structure: First method of integrating spring 1. New java project: spring_mybatis 2. Import the jar package -- the spring and mybatis package, and then build aopalliance.jar aspectjweaver.jar commons-logging.jar mybatis-3.2.7.jar mybatis-spring-1.2.3.jar mysql-conn ...

Preface Spring MVC is a native framework built on the Servlet API and included in the Spring framework from the beginning. This paper mainly describes the architecture and analysis of Spring MVC, and uses Spring Boot + Spring MVC + MyBatis (SSM) + Thymeleaf (Template Engine) framework to build a Web project simply and quickly. Web MVC Architec ...

The basic syntax for splicing Mybatis dynamic sql depends on < if > tags and < Where > tags. The < foreach > tag is used in traversal Demand one Query object is wrapped by wrapping class, and sql statement is stitched dynamically according to the attribute of object. Packaging cla ...

Links to the original text: https://my.oschina.net/u/1781072/blog/542610 1. MyBatis adds/deletes/alters/checks database tables The previous article uses XML-based approach to add/dele ...

1.mybatis multi-table query one-to-one One-to-one (one containing another instance) <!-- One-to-one Association query-resultMap --> <resultMap type="order" id="order_user_map"> <!-- id Tags are used to bind primary keys --> <id property="id" column="id"/> <!-- Use re ...

How to write Java code more normalized   Many of the happiest people are those who own the least. But are we really so happy with our IPhones, our big houses, our fancy cars? Forget Chuan Rusi, people who have everything are more afraid of losing.   Background: There is no need to say how to write Java code more regularly, the most importa ...

thinking First, test whether Spring MVC and Mysteries are available, whether the environment is correct, and then use Spring integration. Build an integrated environment first 2) Build Spring configuration environment 3) Spring integrates Spring MVC framework 4) Spring integrates Mybatis frameworkReq ...