基于gradle和springboot的IDEA项目@SpringBootApplication无法识别，怎么办？

Question

基于gradle和springboot的IDEA项目下面的内容如@SpringBootApplication无法识别

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
//
@SpringBootApplication

如下图无法识别：

build.gradle文件的内容：

plugins {
    id 'org.springframework.boot' version '2.2.5.RELEASE'
    id 'io.spring.dependency-management' version '1.0.9.RELEASE'
    id 'java'
}

group = 'com.iherb'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '11'

repositories {
    mavenLocal()
    mavenCentral()
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-web'
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
    implementation 'org.springframework.boot:spring-boot-starter-parent'
    implementation 'org.springframework.boot:spring-boot-dependencies'
    implementation 'org.springframework.boot:spring-boot-maven-plugin'
    testImplementation('org.springframework.boot:spring-boot-starter-test') {
        exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
    }
}

test {
    useJUnitPlatform()
}

IDEA右侧看不到gradle选项：

重新打开项目后来好了