Programmer Think

1. springboot is to improve and optimize the disadvantages of spring. Its convention is larger than configuration. It can be used out of the box without code generation or xml file configuration. The property value can be modified to meet the requirements 2. Getting started with springboot Create a spring boot project in idea (1) by default, ...

What is an API gateway: In a microservice architecture, there are usually multiple service providers. Imagine an e-commerce system, which may have multiple types of services, such as goods, orders, payments, users, etc., and the number of services of each type will also grow and change with the increase of the whole system volume. As the UI sid ...

Spring MVC file upload) SpringMVC-day02 Spring MVC file upload 1. Use maven to introduce two more jars' commons-io-2.6. Jar commons-fileupload-1.3.3. Jar based on the Spring jar package and spring MVC jar package.` 2. Spring MVC needs to configure processor mapper, processor adapter, view parser a ...

Old design When developing an api, you need to define the data response result of the interface first. Here is a very simple and direct Controller implementation method and response result definition @RestController @RequestMapping("/users") public class UserController { @Inject private UserService userService; @GetRequest("/{user ...

Written in the front, k8s clusters have been set up. Please refer to the previous article for specific steps. Write the Dockerfile file to create a public image. Each time tomcat deploys, it directly uses the image without build ing the image every time. #At first, I wanted to use tomcat's official image, but I had no choice but to use diban ...

Using struts to complete adding, deleting, modifying and checkingIdeas: 1. Import related pom dependencies (struts, custom tag library dependency) 2. Import the paginated tag class, z.tld, and complete the configuration of web.xml 3. dao layer to access data 4. The web layer calls the dao layer to return data to the foreground. 5. Configur ...

Recently, I made such a 406 mistake when I followed the Taotao mall project.This is the code in the Controller @RequestMapping("/items/{itemId}") @ResponseBody public TbItem getItemById(@PathVariable long itemId) { TbItem item=itemService.findItemById(itemId); return item; } This is the ...

1. Create a new project in idea, file - > New - > project. Select Maven, pay attention to jdk1.8, and click Next. 2.k here, Group,Artifactld, click Next. 3. Click finish. 4.ssm_parent1 is the parent class and does not write anything. Then four modules need to be created under ssm_parent1: ...

Article directory 1. Scene description 2. Solutions 2.1 real code 2.2 code description 2.3 renderings: 2.3.1 program directory 2.3.2 maven directory 1. Scene description Spring boot + Maven packaging, projects often use different environments to package different configuration files, ...

Requirement: query users by gender and name SQL statement: Select id, username, birthday, sex, address from 'user ` where sex = 1 and username like'% 3% ' Problems: There may be only one A.sex and username attribute, and the other is null or empty [use if tag] B. when the sex/username property is null or empty, the ...