spring cloud 多模块打包部署解决坑

前置条件

笔者使用Intellij IDEA进行Spring Cloud项目创建和部署

Intellij IDEA 版本：IntelliJ IDEA 2019.1.3 (Ultimate Edition)

Spring Cloud 版本：Spring Cloud Hoxton.SR1，该版本基于 Spring Boot 2.2.2.Release

maven 版本：3.6.3，其中setting.xml文件为原生文件

主pom.xml配置

<?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>2.2.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.albedo</groupId>
    <artifactId>sbe1</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>sbe1</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>Utf-8</project.reporting.outputEncoding>
        <java.version>11</java.version>
        <spring-cloud.version>Hoxton.SR1</spring-cloud.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependecies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

第一个坑，项目可以通过run进行启动，但是通过 mvn clean命令，报如下错误

[INFO] Scanning for projects...
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[ERROR] Non-resolvable import POM: Failure to find org.springframework.cloud:spring-cloud-dependecies:pom:Hoxton.SR1 in https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced @ line 44, column 25
 @ 
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]   
[ERROR]   The project com.albedo:sbe1:1.0-SNAPSHOT (/Users/wangzhangxiong/workspace/jproject/sbe1/pom.xml) has 1 error
[ERROR]     Non-resolvable import POM: Failure to find org.springframework.cloud:spring-cloud-dependecies:pom:Hoxton.SR1 in https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced @ line 44, column 25 -> [Help 2]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
[ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelException

　该错表面是报https://repo.maven.apache.org/maven2无法加载 org.springframework.cloud:spring-cloud-dependecies:pom:Hoxton.SR1

到本地，笔者通过多种思路，其中包括，更改maven 库镜像为阿里云镜像，添加spring-milestones repository到主pom等方法，也试过降低spring cloud版本，都无法达到有效解决，最后解决办法为将

<!--将该部分的type和scope删除-->
<dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependecies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
 </dependencyManagement>

改为

<dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependecies</artifactId>
                <version>${spring-cloud.version}</version>
            </dependency>
        </dependencies>
 </dependencyManagement>

此问题可解。

此时如果使用mvn clean或者mvn install命令，则会报错

[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.2.2.RELEASE:repackage (repackage) on project spring-cloud-eureka-cluster: Execution repackage of goal org.springframework.boot:spring-boot-maven-plugin:2.2.2.RELEASE:repackage failed: Unable to find main class -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException　

这是plugin插件的问题，此时删除spring-boot-maven-plugin插件引入即可

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

多module一起打包问题

将主pom文件新增

<modules>
    <module>eureka-server</module>
</modules>

同时新增配置

最后pom.xml全部配置文件如下

<?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>2.2.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.albedo</groupId>
    <artifactId>spring-cloud-eureka-cluster</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <name>spring-cloud-eureka-cluster</name>
    <packaging>pom</packaging>
    <description>Demo project for Spring Boot</description>
    <modules>
        <module>eureka-server</module>
    </modules>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>Utf-8</project.reporting.outputEncoding>
        <java.version>8</java.version>
        <spring-cloud.version>Hoxton.SR1</spring-cloud.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependecies</artifactId>
                <version>${spring-cloud.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>