Programmer Help

1, Create a web project 1. Add the required jar package in the lib folder:2. Delete the original src directory of the project and create the following four source folders:3. Create the following package structure in "src/main/java". The package name is customized, but the innermost package n ...

MyBatis one-to-one association query In the previous article, it was said that the relationship between user and account is one to many. In turn, the relationship between account and user is actually one to one. Because an account can only belong to one user, the user table and account table are still ...

From: https://javaloop.com/post/spring-ioc The two most important aspects of IOC One is to create a bean container One is the initialization bean An example of starting a spring container: public static void main(String[] args){ ApplicationContext context = new ClassPathXmlApplicationContext("classpat ...

Spring and MyBatis integration 1. Environment construction 2. Development and integration of traditional DAO 3. Development and integration of mapper interface 3.1 MapperFactoryBean based integration 3.2 MapperScannerConfigurer based integration 1. Environment construction Required jar packa ...

##Today's content 1. AJAX: concept, implementation mode (JS implementation mode, JQ implementation mode) 2. JSON: concept, basic rules, access to data, mutual transformation between JSON data and Java objects, cases # AJAX: 1. Concept: ASynchronous JavaScript And XML 1. Asynchronous and synchronous ...

MyBatis Plugin Principle MyBatis is very developer-friendly and provides plug-in mechanisms that allow us to enhance MyBatis's functionality to suit our needs.At the bottom is the use of agent mode + responsibility chain mode MyBatis Official https://mybatis.org/mybatis-3/zh/configuration.html#plug ...

Advantages: it is cumbersome and flexible to use ducument. It's used more now. Because it really gets rid of the coupling we don't want Code: public void addValidation(ServiceClient serviceClient, String tns , String token_str) {         //Because of your different requirements, you can refer to the figure at the bottom to correspond to the sp ...

Preparation Prepare a virtual machine. The virtual machine doesn't have to use Alibaba cloud, but during the recent outbreak, Alibaba cloud has activities, and students can use it for six months free. I set an alarm clock at 7:50 this morning and then I got up to rob the free virtual machine Openi ...

Form verification is an indispensable link when we submit a form. The common verification method is to judge each parameter separately, but this is not only troublesome, but also if we write too many if parameters, the code will be bloated and the readability will be poor. Take login as an example, supp ...

One to one relationship There are two ways to implement one-to-one association in Hibernate 5: primary key Association and foreign key Association. 1. Primary key Association Key point of primary key Association: two associated tables share a primary key value. For example, if a company is registered ...