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This article mainly introduces how to use springboot project as a server to receive multi-file files uploaded through http. Construction project For example, to create a spring MVC project, you need spring-boot-starter-thymeleaf and spring-boot-starter-web start dependencies. For example, to upload files to the server, you need to add tags t ...

1. Add automatic configuration dependencies to pom files: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-autoconfigure</artifactId> </dependency> 2. If a jar exists to configure it, the dependency needs to be added. Add httpclient here: <dependency> & ...

background quartz AutoConfiguration is integrated into springBoot 2.x, but the configuration attribute provided by springBoot does not provide the setting of overwriteExistingJobs. The resulting problems Suppose we use quartz's own database to persist tasks and the system does not provide an interface for tasks. When we need to modify the task ...

introduce Quartz is an open source job scheduling framework written entirely in Java. It has many features, such as database support, clustering, plug-ins, EJB job pre-construction, JavaMail and others, support for cron-like expressions, and so on. The project has been acquired by Terracotta. Introduction to Quartz API The key interfaces of the ...

Scenario introduction Background transmission of data to the front end, generally using json, not to mention many, see an example: If you use the mongodb database, it's very easy to have a situation, which happens when you transfer ObjectId (the default data can be the primary key): data :{ objectId :{ timestamp: 123123123, ...

SpringBoot 2 Timing Task Native Test was successful, but the server could not run. The prompt error is as follows Unexpected error occurred in scheduled task. java.lang.NullPointerException: null Detailed errors are as follows, because the project is placed on the server will report errors. So you have to output the log to the se ...

Background Recently, a company project to achieve a file upload and multi-document online preview function, has been doing wireless tool development, did not involve these things. In addition, the project team is short of java developers, and they are only a half-hanging front-end and a half-hanging java developers, so let me get a Demo first. ...

Interface Document Problems in Development In project development, it is generally divided into front-end UI development and back-end interface development. The front-end obtains data by calling the RESTful API interface of the back-end and then displays it. So UI development engineers need to know what the back-end interface looks like, such a ...

I. What is Mybatis? Mybatis is an excellent java-based persistence framework, which encapsulates jdbc internally, so that developers only need to pay attention to SQL statement s themselves, and do not need to spend energy to deal with the complicated process of loading driver, creating connection, creating state and so on. At the same time, m ...

1. Spring Boot Fast Building 1. New projects using IntelliJ IDEA File-New-project Select Spring Initializr, then select the default url and click on [Next]: Then modify the project information: Check the Web template: Select the location of the project and click Finish. If you configure Spring Boot for the first time, you ma ...