Gradle Spring Boot Project Cannot Run From IDEA [duplicate] - spring-boot

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NoClassDefFoundError after IntelliJ IDEA upgrade
(3 answers)
Closed 5 years ago.
I am struggling to set up the spring boot project that i have imported in intelliJ IDEA 2016 1.4.
Every time i run . I get the below Exception:
Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/boot/SpringApplication
at com.patientConnect.DemoApplication.main(DemoApplication.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.SpringApplication
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 6 more
My gradle settings (linked gradle projects,user gradle wrapper ) all looks good.
package com.Demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class DemoApplication {
public DemoApplication() {
}
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
build.gradle:
buildscript {
repositories {
mavenLocal()
mavenCentral()
maven {
url 'https://plugins.gradle.org/m2/'
}
}
dependencies {
classpath 'org.springframework.boot:spring-boot-gradle-plugin:1.4.2.RELEASE'
classpath 'gradle.plugin.com.jamesward:atom-gradle-plugin:0.0.1'
}
}
apply plugin: 'java'
apply plugin: 'org.springframework.boot'
repositories {
mavenLocal()
mavenCentral()
}
dependencies {
compile 'org.springframework.boot:spring-boot-starter-parent:1.5.4.RELEASE'
compile 'org.springframework.boot:spring-boot-starter-web'
compile 'org.springframework.boot:spring-boot-devtools'
compile 'org.springframework.boot:spring-boot-starter-security'
compile 'org.springframework.security.oauth:spring-security-oauth2'
compile 'org.apache.httpcomponents:httpclient'
compile 'org.springframework.boot:spring-boot-starter-data-jpa'
compile 'org.postgresql:postgresql'
compile 'org.springframework.boot:spring-boot-starter-jdbc'
compile 'org.hibernate:hibernate-entitymanager'
}
allprojects {
sourceCompatibility = 1.8
targetCompatibility = 1.8
}
import org.gradle.internal.os.OperatingSystem
task devClasses(type: Exec) {
if (OperatingSystem.current().isWindows())
commandLine 'gradlew', '-t', 'classes'
else
commandLine './gradlew', '-t', 'classes'
}
task devBootRun(type: Exec) {
if (OperatingSystem.current().isWindows())
commandLine 'gradlew', 'bootRun'
else
commandLine './gradlew', 'bootRun' //, '--debug-jvm'
}
import java.util.concurrent.*
task dev() << {
def devClassesFuture = Executors.newSingleThreadExecutor().submit({ devClasses.execute() } as Callable)
def devBootRunFuture = Executors.newSingleThreadExecutor().submit({ devBootRun.execute() } as Callable)
devClassesFuture?.get()
devBootRunFuture?.get()
}
task stage {
dependsOn build
}

Answer 1

Try deleting your SpringBoot dependency on your computer.
It will be located at ~/.gradle/caches/modules-2/files-2.1/org.springframework.boot Assuming you kept your gradle dependencies in the default location.
rm -rf ~/.gradle/caches/modules-2/files-2.1/org.springframework.boot
or to delete all dependencies (Just to be sure if no other dependencies is corrupted)
rm -rf ~/.gradle/caches/modules-2/files-2.1/*
then to re-download
gradle build --refresh-dependencies