二、elastic-job 项目打包

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上一篇：elastic-job、elastic-job-lite-console使用案例

1、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>elasticJobDemo</groupId>
    <artifactId>elasticJobDemo</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>com.dangdang</groupId>
            <artifactId>elastic-job-lite-core</artifactId>
            <version>2.1.5</version>
        </dependency>
        <dependency>
            <groupId>com.dangdang</groupId>
            <artifactId>elastic-job-lite-spring</artifactId>
            <version>2.1.5</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.1.2.RELEASE</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.2.1</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <transformers>
                                <transformer
                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <mainClass>com.cn.dl.main.ApplicationJob</mainClass>
                                </transformer>
                                <transformer
                                        implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                    <resource>META-INF/spring.handlers</resource>
                                </transformer>
                                <transformer
                                        implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                    <resource>META-INF/spring.schemas</resource>
                                </transformer>
                            </transformers>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

2、进入pom.xml所在目录，执行命令：mvn clean package

3、然后在classes目录下找到elasticJobDemo-1.0-SNAPSHOT.jar，这里面包含了项目中所有依赖的jar，所以肯定不是几十、几百KB！

4、jar包生成之后，就可以使用命令 java -jar elasticJobDemo-1.0-SNAPSHOT.jar执行了

5、通过maven-assembly-plugin插件打包，执行jar包有点问题，缺少springframework一些配置，比如（spring.handlers、spring.schemas等）

<?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>elasticJobDemo</groupId>
    <artifactId>elasticJobDemo</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>com.dangdang</groupId>
            <artifactId>elastic-job-lite-core</artifactId>
            <version>2.1.5</version>
        </dependency>
        <dependency>
            <groupId>com.dangdang</groupId>
            <artifactId>elastic-job-lite-spring</artifactId>
            <version>2.1.5</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.1.2.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
       <plugins>
          <plugin>
               <groupId>org.apache.maven.plugins</groupId>
               <artifactId>maven-jar-plugin</artifactId>
               <version>3.1.0</version>
          </plugin>
          <plugin>
               <artifactId>maven-assembly-plugin</artifactId>
               <configuration>
                  <descriptorRefs>
                      <descriptorRef>jar-with-dependencies</descriptorRef>
                  </descriptorRefs>
               <archive>
                   <manifest>
                          <mainClass>com.cn.dl.main.ApplicationJob</mainClass>
                   </manifest>
               </archive>
               </configuration>
          </plugin>
       </plugins>
    </build>
</project>

使用maven-assembly-plugin打包命令：mvn clean assembly:assembly

在classes下找到elasticJobDemo-1.0-SNAPSHOT-jar-with-dependencies.jar

建议使用maven-shade-plugin插件打包，不然线上有很多想不到的问题，之前遇到过，很DT。