I'm trying to start my first project with Spring. I use IntelliJ idea and I'm kind of new to it too. But anyways, I followed the step written on the Jetbrains website and I don't know what I have done wrong, but I got a lot of errors on the first to files that are created by default.
BloomBookingApplcation.java
package com.bloombooking;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class BloomBookingApplication {
public static void main(String[] args) {
SpringApplication.run(BloomBookingApplication.class, args);
}
}
Error:(3, 12) Cannot resolve symbol 'springframework'
Error:(4, 12) Cannot resolve symbol 'springframework'
Error:(6, 2) Cannot resolve symbol 'SpringBootApplication'
Warning:(7, 1) Access can be packageLocal
Error:(9, 26) Cannot resolve symbol 'String'
Error:(10, 3) Cannot resolve symbol 'SpringApplication'
Maybe I'm stupid but I don't know which step I've missed...
How can I fix this?
I have found the way to add spring with the quickfix button.
But now I have got new errors I don't understand why... I should maybe download it directly and put the libraries one by one maybe?
Error:(3, 28) Cannot resolve symbol 'boot'
Error:(4, 28) Cannot resolve symbol 'boot'
Error:(6, 2) Cannot resolve symbol 'SpringBootApplication'
Warning:(7, 1) Access can be packageLocal
Error:(9, 26) Cannot resolve symbol 'String'
Error:(10, 3) Cannot resolve symbol 'SpringApplication'
Or maybe it's my IntelliJ idea which isn't configured right since I don't have any completion anywhere and I can't create packages...
10 Answers
Click on refresh button .Maven may not be able to sync properly
I had the same problem, and this is how it worked for me:
On the source root directory -> right click -> Add Framework Support.
A window will open with different categories, such as Java EE, JBoss etc. Go to 'Spring' category. Then, download the pack of libraries that you need (I used 'Spring MVC').
Add dependency for springframework in pom.xml and run below command from directory where pom.xml exist.
mvn clean install -U
Above command will forcefully download the dependencies.
if you are behind proxy then try below command
mvn clean install -DproxySet=true -DproxyHost=www-proxy.us.com -DproxyPort=80
In my case triggering an Invalidate Caches/Restart helped IntelliJ now find those dependencies.
Following what Mr. BlueSky told in his answer here, I could get the dependencies downloaded. Actually, the answer by Vinayak Shedgeri should have helped too. For those whom it didn't, you could try the invalidate cache/restart.
P. S.: And going by what could have caused this behavior, you could very well try something as simple as relaunching IntelliJ first. Just a guess.
Project root directory -> right click -> Add Framework Support --> Maven or Gradle --> Click Ok
In my case, I was behind Office proxy and that why MAVEN was unable to download the required dependencies on its own !
After switching the network and executing below command : mvn clean install -U, it worked !!
Please check if you have configured Maven Settings.
IntelliJ (File > Settings > Build,Execution,Deployment > Build Tools > Maven )
Maven home path : C:/Program Files/apache-maven-3.6.0
It resolved my error.
Check if
/Users/<userName>/.m2/
location has settings.xml and toolchains.xml. I think toolchains might not be necessary but settings.xml is required. Instructions for creating settings.xml can be found here -
My issue was resolved after adding settigs.xml and toolchains.xml to above mentioned location and restarting the IDE.
Maven did not added dependencies on intellij so for this problem I restarted intellij IDE and when this time IDE stared it added dependencies successfully.
Right click on the project and select Open In → Terminal
In the terminal, type → mvn -U idea:idea
It will resolve all the classpath issues for the particular project
