I'm about to rewrite a Struts 2 webapp with SpringBoot & Spring Web.
How can I get started? I'm using start.spring.io with three dependencies: Spring Web, MyBatis Framework and MySQL Driver
I've opened the project in IntelliJ, built the project (no problem) but can't run the webapp as it fails to connect to my MySQL instance. Sure I realise that I'll need to provide DB URL, username, password, port, etc. but there's no configuration files included in the zip. Where do I add these so I can properly set the properties?
How can I get started with an up-to-date version of Spring Boot that includes the basic dependencies I need?
It's so frustrating to be hamstrung at the first hurdle when I know I'll be able to run the rest of the way once I get over this first step!
Thank you.
You can find a file named "application.yml" or "application.properties" in directory below.
src/main/resources/
So, you have to go into that, and put the configs there.
spring.jpa.hibernate.ddl-auto=update
spring.datasource.url=jdbc:mysql://${MYSQL_HOST:localhost}:3306/db_example
spring.datasource.username=springuser
spring.datasource.password=ThePassword
spring.datasource.driver-class-name =com.mysql.jdbc.Driver
#spring.jpa.show-sql: true
Also, check to make sure you have the required dependencies added. You'll probably need these dependencies Spring Web, Spring Data JPA, and MySQL Driver.
For example, in case you're using Maven. You can go check the dependencies section of POM.XML.
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.17.Final</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.19</version>
<scope>runtime</scope>
</dependency>
I highly recommend you to check this link.
Related
I user Spring Tool Suite 4 to build a Spring boot project. When I try to specify dependency MySQL JDBC driver, I got this error:
Could not transfer artifact com.mysql:mysql-connector-j:jar:8.0.31 from/to central (https://repo.maven.apache.org/maven2): Connect timed out
org.eclipse.aether.transfer.ArtifactTransferException: Could not transfer artifact com.mysql:mysql-connector-j:jar:8.0.31 from/to central (https://repo.maven.apache.org/maven2): Connect timed out
The first I use these code:
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
And after that I found this guide https://blogs.oracle.com/mysql/post/mysql-connectorj-has-new-maven-coordinates so I change to
<dependency>
<groupId>com.mysql</groupId>
<artifactId>mysql-connector-j</artifactId>
<version>8.0.31</version>
</dependency>
but it still does not work.
Please help me! It took me a lot of time.
My JavaFx application is running perfectly well from source but When I'm compiling to a single jar file I get error :
Error: JavaFX runtime components are missing, and are required to run this application.
I'm using Maven as my repository manager and My install with Maven is sucessfull.
Note: In my Intellij build artifact I can see that Intellij include JavaFx and all its libraries
a) For my maven project the trick was to use an extra starter class that does not inherit from javafx.application.Application:
public class GUIStarter {
public static void main(final String[] args) {
GUI.main(args);
}
}
The JavaFx dependencies are included in my pom.xml as follows:
<!-- JavaFx -->
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-base</artifactId>
<version>12</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-controls</artifactId>
<version>12</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-graphics </artifactId>
<version>12</version>
<classifier>win</classifier>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-fxml</artifactId>
<version>12</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-web</artifactId>
<version>12</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-media</artifactId>
<version>12</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-swing</artifactId>
<version>12</version>
</dependency>
In order to include fxml files in your build, you might need to define them as resource:
!-- define JavaFx files as resources to include them in the jar -->
<resource>
<directory>${basedir}/src/main/java/foo/baa/view</directory>
<filtering>false</filtering>
<targetPath>foo/baa/view</targetPath>
</resource>
b) As an alternative, an extra maven plugin "javafx-maven-plugin" could be used to build the javafx appication, see example project at https://openjfx.io/openjfx-docs/#maven (This did not work for me. I have several pom files and want to reference the javafx dependencies in a sub project. My main class could not be found by the javafx-maven-plugin.)
In Java 11 the JavaFX components have been removed into their own SDK, so when you run it won't be able to find them in the runtime.
The JavaFX page has the instructions to get it going: https://openjfx.io/openjfx-docs/#install-javafx
In short, you have to compile / run by adding the javafx modules in, either as options passed on the command line, or using a modular project.
I found that the modular project with Maven and IntelliJ worked best for me. https://openjfx.io/openjfx-docs/#IDE-Intellij
In the modular method you have a module-info.java file that describes all the modules that your project "requires", and allows you to "open" them to other modules. If you have a bunch of Maven dependencies you have to add them in the requires list too though. (IntelliJ can make this easy - find the error about no requires in the code and alt-enter)
Once everything was working with modules etc, I had to make a Fat Jar using I think the Maven shade plugin, to put everything together. Then it would work running the jar from the command line.
However, after getting my Java 11 code ##$%## working after 2 days of pain, I went back to Java 8 (using correto SDK for latest version) as Java 11 doesn't have packaging and IntelliJ can't do it for you.
i am coding a maven project with spring,
the default mysql-connector is version 6.0.5, and whenever i run the app on server the stack trace tells me that "Could not load JDBC driver class [com.mysql.jdbc.Driver]".
So i add as external library mysql-connector downloaded from mvnrepository.com version 5.1.40, add the dependency code to pom.xml and then it works!
How can i fix it using v 6.0.5?
thanks
If I understand you correctly you downloaded manually mysql connector, and added it as library.
Add dependency in pom.xml and reimport maven dependencies.
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>6.0.5</version>
</dependency>
You should checkout if your application.properties are set correctly, e.g:
spring.datasource.url=jdbc:mysql://localhost/jpa_example
spring.datasource.username=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
I have a Spring REST project configured with hsqldb.
I would like to change it to MySQL.
I have MySQL server installed and running, but I don't know how to modify this pom:
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<scope>runtime</scope>
</dependency>
PS.: Project im talking about comes as a source code for 'Spring REST' book:
http://www.apress.com/9781484208243
source code download link:
http://www.apress.com/downloadable/download/sample/sample_id/1704/
As far I see you are using Spring Boot on this, so you can easy change the databases changing the drivers dependencies from:
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<scope>runtime</scope>
</dependency>
To
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
The driver version will be version on parent pom.
Then specify the parameters on properties
spring.datasource.url=jdbc:mysql://localhost:port/yourdb
spring.datasource.username=dbuser
spring.datasource.password=dbpass
spring.datasource.driver-class-name=com.mysql.jdbc.Driver # we can ommit this if we want, Spring Boot will deduce based on the classpath
For more configuration on databases you can see the properties available on appendix here
I'd like to install the JDBC connector using maven.
I have the following: mvn install:install-file -DgroupId=mysql -DartifactId=mysql-connnector-java -Dversion=5.1.6 -Dpackaging=jar -Dfile= -DgenerationPom=true
I think all I'm need is what I put on the other side of the =Dfile= ?
I haven't used maven in a while either, so I'm not sure what the file switch is used for?
Thanks for all the insight!
The "install-file" or "deploy-file" goals are used for installing or deploying artifacts to your local or internal repository that are not available from Maven Central or other external repositories that you may have configured.
If you've got access to Maven Central, simply adding the following to your project's pom.xml:
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
...should do the trick.
To answer your question though, the -Dfile= argument is for specifying the artifact that would actually be installed in the local repository.
lotz answer is right and that should be sufficient
But, If you want to use the latest version of the connector, you can check https://mvnrepository.com/artifact/mysql/mysql-connector-java
Add the following to your project's pom.xml:
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>6.0.6</version>
</dependency>