相关疑难解决方法(0)

我在尝试从项目中的 npm 切换到纱线时遇到问题。我尝试下载yarn，但仍然使用npm来启动我的项目。我需要切换，因为我正在处理的一个项目需要它是纱线，所以我可以添加一个 maven 前端插件来将我的后端和前端联系起来以进行部署。

1.
<frontend-maven-plugin.version>1.6</frontend-maven-plugin.version>
<node.version>v10.13.0</node.version>
<yarn.version>v1.12.1</yarn.version>

2.
<profiles>
    <profile>
        <id>demo</id>
        <build>
            <plugins>

                <plugin>
                    <groupId>com.github.eirslett</groupId>
                    <artifactId>frontend-maven-plugin</artifactId>
                    <version>${frontend-maven-plugin.version}</version>
                    <configuration>
                        <workingDirectory>src/js</workingDirectory>
                    </configuration>
                    <executions>
                        <execution>
                            <id>install node</id>
                            <goals>
                                <goal>install-node-and-yarn</goal>
                            </goals>
                            <configuration>
                                <nodeVersion>${node.version}</nodeVersion>
                                <yarnVersion>${yarn.version}</yarnVersion>
                            </configuration>
                        </execution>
                        <execution>
                            <id>yarn install</id>
                            <goals>
                                <goal>yarn</goal>
                            </goals>
                            <phase>generate-resources</phase>
                        </execution>
                        <execution>
                            <id>yarn test</id>
                            <goals>
                                <goal>yarn</goal>
                            </goals>
                            <phase>test</phase>
                            <configuration>
                                <arguments>test</arguments>
                                <environmentVariables>
                                    <CI>true</CI>
                                </environmentVariables>
                            </configuration>
                        </execution>
                        <execution>
                            <id>yarn build</id>
                            <goals>
                                <goal>yarn</goal>
                            </goals>
                            <phase>compile</phase>
                            <configuration>
                                <arguments>build</arguments>
                            </configuration>
                        </execution>
                    </executions>
                </plugin>
                <plugin>
                    <artifactId>maven-resources-plugin</artifactId>
                    <executions>
                        <execution>
                            <id>copy-resources</id>
                            <phase>process-classes</phase>
                            <goals>
                                <goal>copy-resources</goal>
                            </goals>
                            <configuration>
                                <outputDirectory>${basedir}/target/classes/static</outputDirectory> …