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In spring boot, a few simple steps to read the various types of property values in the configuration file (APPLICATION.YML):1, the introduction of dependency:[HTML]View PlainCopy
dependency>
groupId>org.springframework.bootgroupId>
artifactid>spring-boot-
(1) Problem: A program developed locally using Spring-boot has always wanted files to be exported to a folder by day. But has been successful.Resolution process:Think of the log first to configure the Log4j.properties file, but has not been successful, I put the file in the source directory. does not take effect.Then check the data to understand that the Spring-
Application.propertiesTest.name= test Test.url=www.test.com[Email protected] AnnotationsThis can be called directly in the controller.@Value ("${test.name}")private String name; @Value ("${test.url}")Private String URL;[Email protected] (prefix= "Test")Create a new Configtest.java@Component @ConfigurationProperties (prefix= "test")publicclass Configtest () { private String name; Private String URL; // Get--set }Two ways to read a configurati
continuous interval (9-12), a time interval (8-18/4) (/= every 4 hours), a list (1,3,5), and a wildcard character. * Because the "date in month" and "Day of the Week" are mutually exclusive, one of the two elements must be set?. */@Scheduled (Cron= "5 * * * *?") Public voidcronscheduled () {Log.info ("Cron:the time is now {}", Dateformat.format (NewDate ())); }}Enable Scheduled Tasks PackageCom.zooper.demo;Importorg.springframework.boot.SpringApplication;Importorg.springframework.boot.a
About the creation of the spring boot inline tomcat in
In the Onrefresh method of Embeddedwebapplicationcontext,
A servletcontextinitializer was added when it was created.
This.embeddedservletcontainer = Containerfactory
. Getembeddedservletcontainer (Getselfinitializer ());This servletcontextinitializer is used to add servlet,filter when Tomcat is started
In addition, there seems to be a
instead of listed -
settingname= "Usecolumnlabel"value= "true" />
allows the use of custom primary key values (such as the program-generated UUID 32-bit encoding as the key value), the data table PK generation policy will be overwritten -
settingname= "Usegeneratedkeys"value= "true" />
give nested resultmap with field-property mapping support -
settingname= "Automappingbehavior"value= "PARTIAL" />
caching SQL for bulk update operations
The Tomcat server embedded in Spring Boot runs on port 8080 by default. If we need to modify the Tomcat port, we can configure the Tomcat information in Src/main/resources/application.properties.
Server. Port=8089
Now, you can rerun the example above to see if the Tomcat port becomes 8089.If you want to configure Tomcat directly from your code, you can define tomcatembeddedservletcontainer
The pom file is added1 Hot Deployment -2 Dependency>3 groupId>Org.springframework.bootgroupId>4 Artifactid>Spring-boot-devtoolsArtifactid>5 Optional>TrueOptional>6 Scope>TrueScope>7 Dependency>8 ----------------------------------------------------9 Build>Ten Plugins> One plugin> A groupId>Org.springframework.bootgroupId> - Artifactid>
Https://stackoverflow.com/questions/40384056/consider-defining-a-bean-of-type-package-in-your-configuration-spring-bootYour Applicant class is not scanned it seems. By default all packages starting with the-the class where you have put'll be @SpringBootApplication scanned.Suppose your main class "Webserviceapplication" is in "" and then all components this com.service.something fall under "is com.service.so
The Druid is the best database connection pool in the Java language and provides powerful monitoring and scaling capabilities. the industry compared Druid and HIKARICP, although HIKARICP performance is higher than Druid, but because Druid includes many dimensions of statistical and analytical functions, so this is why everyone chooses to use it. The following describes how to configure using Druid in Springboot 1: Modify the Pom file to add dependencies:
2: Add the appropriate data sourc
Spring Boot Resource file property configurationThe configuration file refers to the resources root directory application.properties or the application.yml configuration file, read the two configuration files in two ways, are relatively simple.Add in Pom.xml:first, the resou
The Spring boot configuration file is detailedSpring boot provides two commonly used configuration files, the properties file and the Yml file. Their role is to modify the default values for spring
First, the configurationResources under Application.properties1. General ConfigurationResources under Application.properties, such as write: server.port=9090, then the boot port is 90902. Custom Configuration3. Reference to configuration variables4, Random value configuration: If the parameters are random, you can be in the c
Spring boot default configuration files are application.properties or application.yml or Application.yaml files under the ClasspathWhere the properties file is no different from the usual configuration file, the next step is to introduce the Yml file. YML is a data-centric markup language that is particularly well-suit
In order of precedence from highest to lowest, the specific list is as follows.
command-line arguments.
The Java system parameters obtained through System.getproperties ().
Operating system environment variables.
The JNDI attribute obtained from java:comp/env.
The "random.*" property generated by Randomvaluepropertysource.
Apply a property file other than the Jar file.
Apply the properties file inside the Jar file.
A property file that is declared through the "@Propert
The JSON conversion tool that spring boot uses by default is Jackson.Integrated fastjson,pom.xml to introduce Fastjson jar Configure FastjsonStart the class injection Bean httpmessageconverters@Bean Publichttpmessageconverters Fastjsonhttpmessageconverter () {//defines an object that transforms messagesFastjsonhttpmessageconverter Fastconverter =NewFastjsonhttpmessageconverter (); //Add Fastjson
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