在使用docker创建容器运行报错no main manifest attribute, in app.jar

原因就是在打包的时候pom配置有问题,重新配置再打包

我的dockerfile

FROM openjdk:11
MAINTAINER yyf
COPY *.jar /app.jar
EXPOSE 8082
ENTRYPOINT ["java","-jar","app.jar"]

修改过后，经测试成功了

参考我的pom

<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.1</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.itfly</groupId>
    <artifactId>idea-docker</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>idea-docker</name>
    <description>idea-docker</description>
    <properties>
        <java.version>11</java.version>
            <!-- docker镜像前缀 -->
            <docker.image.prefix>yyf</docker.image.prefix>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>


        <!-- web层-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>


    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <includeSystemScope>true</includeSystemScope>
                    <!--指定主类-->
                    <mainClass>com.itfly.IdeaDockerApplication</mainClass>
                </configuration>
            </plugin>

            <!-- maven打包插件-->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>

                <configuration>
                    <source>11</source>
                    <target>11</target>
                </configuration>
            </plugin>

            <!-- docker插件-->
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <version>1.0.0</version>
                <dependencies>
                    <dependency>
                        <groupId>javax.activation</groupId>
                        <artifactId>activation</artifactId>
                        <version>1.1</version>
                    </dependency>
                </dependencies>
                <configuration>
                    <!-- 远程Docker的地址 -->
                    <dockerHost>http://ip:2375</dockerHost>
                    <!-- 镜像名称、前缀、项目名 -->
                    <imageName>${docker.image.prefix}/${project.artifactId}</imageName>
                    <!-- Dockerfile的位置 -->
                    <!--src/main/java/com/itfly/docker-->
                    <dockerDirectory>src/main/java/com/itfly/docker</dockerDirectory>
                    <resources>
                        <resource>
                            <targetPath>/</targetPath>
                            <!-- 表示的target文件夹 -->
                            <directory>${project.build.directory}</directory>
                            <!-- 表示打出来的JAR包-->
                            <include>${project.build.finalName}.jar</include>
                        </resource>
                    </resources>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>