CODEWITHSUNDEEP
javaspringmavenspring-bootintellij-idea
Chen
Chen

Reputation: 1

error:java package xxx does not exist despite IDEA being aware of them

I'm leanring springboot with some source code.Recent days,when I begin learning new lessons and want to import the example project I found I fail to import all the packages when I open the example project. Although previous example projects works fine.

It's especially strange that the editor actually can identify those packages - it even offered me the appropriate classes when I manually deleted the import statements, I can see the library in the Project tree under External Libraries,I even can skip to see where the package is through ctrl+click. However, I always get a list of "java: package ... does not exist" upon compilation.How should I solve the problem?Thanks!!

I hava tried following solutions:

  1. reimport in maven settings

  2. invalidate and restart

3.check pom.xml

my pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
  http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.neo</groupId>
    <artifactId>spring-boot-file-upload</artifactId>
    <packaging>jar</packaging>
    <version>1.0</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.5.RELEASE</version>
    </parent>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

some of the wrong import

import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.multipart.MultipartException;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

error messages while compiling:

fail to import all the packages

therefore can't resolve all the related symbols

Upvotes: 0

Views: 877

Answers (1)

Alexis Dufrenoy
Alexis Dufrenoy

Reputation: 11946

Your project is missing some dependencies. You are not only using Spring Boot, but also Spring Web and Spring MVC.

Try adding this to your pom.xml:

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>5.1.9.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.1.9.RELEASE</version>
</dependency>

You may want to adapt depending on the Spring version you are using.

Upvotes: 0

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