docker Dockerfile在找不到Java类时失败，如何指定类路径或jar/mvnw？
下面是this链接中的一个示例，它展示了如何开发一个简单的React/Spring boot CRUD应用程序。效果很好
现在，我正试图将其移动到Docker容器中。我已经成功地为“dev”配置文件完成了这项工作，这是默认配置文件，但该部分不包括构建中的React前端
以下是当前Docker文件：
From openjdk:8
copy ./target/licensing-app-0.0.1-SNAPSHOT.jar licensing-app-0.0.1-SNAPSHOT.jar
copy ./mvnw mvnw
copy ./pom.xml .
copy ./.mvn/wrapper/maven-wrapper.properties .mvn/wrapper/maven-wrapper.properties
copy ./app .
#cmd ["java","-jar","licensing-app-0.0.1-SNAPSHOT.jar"]
cmd ./mvnw spring-boot:run -Pprod
现在，我想用“prod”配置文件运行它，其中包括前端。prod版本添加了参数“-Pprod”
./mvnw spring-root:run -Pprod
我将Dockerfile更改为从该命令开始，如下所示：
copy ./target/licensing-app-0.0.1-SNAPSHOT.jar licensing-app-0.0.1-SNAPSHOT.jar
copy ./mvnw mvnw
copy ./pom.xml .
COPY ./.mvn/wrapper/maven-wrapper.properties .mvn/wrapper/maven-wrapper.properties
copy ./app .
CMD ./mvnw spring-boot:run -Pprod
但是，当我运行它时，它会因以下错误而失败：
licensing-app_1 | [WARNING]
licensing-app_1 | java.lang.ClassNotFoundException: com.license.gen.app.LicenseGenApplication
licensing-app_1 | at java.net.URLClassLoader.findClass (URLClassLoader.java:382)
licensing-app_1 | at java.lang.ClassLoader.loadClass
这似乎违背了jar文件的目的，因为它似乎需要目标目录的副本。但是我不知道如何指定到的类路径。mvnw，似乎不需要
我还尝试运行标准的“java-jar myjar.jar-Pprod”命令，但它不执行构建部分
这是pom。xml:
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.okta.developer</groupId>
<artifactId>licensing-app</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>license-gen</name>
<description>Analytics License Gen App</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<frontend-maven-plugin.version>1.6</frontend-maven-plugin.version>
<node.version>v10.13.0</node.version>
<yarn.version>v1.12.1</yarn.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-oauth2-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-oauth2-jose</artifactId>
</dependency>
<!-- For Java 8 Date/Time Support -->
<!--test without this, originally from example online poll program -->
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
</dependency>
<!--<dependency>-->
<!--<groupId>com.h2database</groupId>-->
<!--<artifactId>h2</artifactId>-->
<!--<scope>runtime</scope>-->
<!--</dependency>-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.8</version>
</dependency>
<dependency>
<groupId>com.github.oshi</groupId>
<artifactId>oshi-core</artifactId>
<version>3.4.0</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.5</version>
</dependency>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk</artifactId>
<version>1.9.6</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>com.license.gen.app.LicenseGenApplication</mainClass>
</configuration>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<id>dev</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<properties>
<spring.profiles.active>dev</spring.profiles.active>
</properties>
</profile>
<profile>
<activation>
<activeByDefault>false</activeByDefault>
</activation>
<id>prod</id>
<build>
<plugins>
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<executions>
<execution>
<id>copy-resources</id>
<phase>process-classes</phase>
<goals>
<goal>copy-resources</goal>
</goals>
<configuration>
<outputDirectory>${basedir}/target/classes/static</outputDirectory>
<resources>
<resource>
<directory>app/build</directory>
</resource>
</resources>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>com.github.eirslett</groupId>
<artifactId>frontend-maven-plugin</artifactId>
<version>${frontend-maven-plugin.version}</version>
<configuration>
<workingDirectory>app</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>
</plugins>
</build>
<properties>
<spring.profiles.active>prod</spring.profiles.active>
</properties>
</profile>
</profiles>
</project>
解决方案：我用mvn运行它，因为我用“p”参数尝试了几种java变体，但没有成功。幸运的是，自从被删除后，有人就在jar文件之前用“P”参数运行它发表了评论。这不起作用，但它起作用了：cmd[“java”、“-Dspring.profiles.active=prod”、“-jar”、“licensing-app-0.0.1-SNAPSHOT.jar”]
# 1 楼答案
如果已经将jar复制到容器中，为什么还要再次编译该项目
我认为你可以简单地用CMD运行jar文件
但是如果你想让容器编译项目，只需复制源文件，编译并运行jar即可
试着这样做：