springboot静态资源及第三方依赖包分离打包

环境准备：
jdk 1.8
maven 3.6
springboot 2.2.2.RELEASE

为什么要分离打包

我们在使用maven为springboot项目打包时会发现打完的jar包会很大，而实际上里面绝大部分的大文件为静态资源和第三方依赖的jar包，而动辄百兆的jar包每次发布时候就很头痛了，上传服务器时由于带宽的限制每次都非常慢，其次如果只需要改静态文件，但还得重新打包发布并重启，很是麻烦，所以分离打包主要是为了解决2个痛点：

• 发布时上传时间太久
• 修改静态文件不用重启服务

Talk is cheap. Show me the code!

pom.xml

<build>
        <finalName>${project.artifactId}-${profiles.active}</finalName>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
                <includes>
                    <include>application.yml</include>
                    <include>application-${profiles.active}.yml</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>false</filtering>
                <includes>
                    <include>templates/**</include>
                    <include>static/**</include>
                    <include>mapper/**</include>
                    <include>freemark/**</include>
                    <include>spy.properties</include>
                </includes>
            </resource>
        </resources>
        <plugins>
            <!-- 分离打包开始 -->
            <!-- 跳过测试代码 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <skipTests>true</skipTests>
                </configuration>
            </plugin>
            <!-- maven打包成jar的插件 -->
            <!-- 打包jar文件时，配置manifest文件，加入lib包的jar依赖 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <!-- 把target/classes/下的文件导入到jar内 -->
                    <classesDirectory>target/classes/</classesDirectory>
                    <finalName>${project.artifactId}-${project.version}</finalName>
                    <archive>
                        <manifest>
                            <!-- 指定程序入口 -->
                            <mainClass>com.jingci.erp.ErpApplication</mainClass>
                            <!-- 打包时 MANIFEST.MF文件不记录的时间戳版本 -->
                            <useUniqueVersions>false</useUniqueVersions>
                            <addClasspath>true</addClasspath>
                            <!-- 服务依赖的jar包放在lib目录下 -->
                            <classpathPrefix>lib/</classpathPrefix>
                            <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                        </manifest>
                        <manifestEntries>
                            <!--MANIFEST.MF 中 Class-Path 加入资源文件目录 -->
                            <Class-Path>./resources/</Class-Path>
                        </manifestEntries>
                    </archive>
                    <!-- jar包中不包括以下文件 -->
                    <excludes>
                        <exclude>mapper/**</exclude>
                        <exclude>static/**</exclude>
                        <exclude>templates/**</exclude>
                        <exclude>**/*.yml</exclude>
                        <exclude>**/*.xml</exclude>
                        <exclude>**/*.properties</exclude>
                    </excludes>
                    <outputDirectory>${project.build.directory}</outputDirectory>
                </configuration>
            </plugin>
            <!-- 分离打包关键代码 maven-dependency-plugin -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <executions>
                    <execution>
                        <id>copy-dependencies</id>
                        <phase>package</phase>
                        <goals>
                            <goal>copy-dependencies</goal>
                        </goals>
                        <configuration>
                            <type>jar</type>
                            <includeTypes>jar</includeTypes>
                            <!-- 存放服务依赖的jar包，存放在服务相同目录的lib文件夹下 -->
                            <outputDirectory>
                                ${project.build.directory}/lib
                            </outputDirectory>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <!-- 分离打包关键代码 maven-resources-plugin -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <executions>
                    <execution>
                        <id>copy-resources</id>
                        <phase>package</phase>
                        <goals>
                            <goal>copy-resources</goal>
                        </goals>
                        <configuration>
                            <!-- 指定resources文件 -->
                            <resources>
                                <resource>
                                    <directory>src/main/resources</directory>
                                    <!-- 分环境过滤开启 -->
                                    <filtering>true</filtering>
                                    <includes>
                                        <include>application.yml</include>
                                        <!-- 分环境配置文件不用可删除 -->
                                        <!-- <include>application-${profiles.active}.yml</include> -->
                                    </includes>
                                </resource>
                                <resource>
                                    <directory>src/main/resources</directory>
                                    <!-- 分环境过滤关闭 -->
                                    <filtering>false</filtering>
                                    <includes>
                                        <include>templates/**</include>
                                        <include>static/**</include>
                                        <include>mapper/**</include>
                                        <include>freemark/**</include>
                                        <include>spy.properties</include>
                                    </includes>
                                </resource>
                            </resources>
                            <!-- 输出路径 -->
                            <outputDirectory>${project.build.directory}/resources</outputDirectory>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <!-- 分离打包结束 -->
        </plugins>
    </build>

打包

然后执行

mvn clean package

等打包结束就可以看到项目根目录下的target文件夹的结构如下

启动测试

随后就可以将lib、resources、xxx.jar这三个文件夹发布到服务器上，定位到指定目录后执行

java -jar xxx.jar

便可启动项目

后续维护

至此分离打包结束、以后项目发布过程中，在第三方jar包或静态资源没有变化的情况下可以只发布项目源代码jar包，以节省发布时间提高效率

over!