maven profile 结合spirng注解使用——实现配置文件最小化(二)

蔚落 2022-06-14 05:51 127阅读 0赞

# maven profile 结合spirng注解使用——实现配置文件最小化(二) #

上篇文章介绍了如何通过spring和maven的profile结合实现配置最小化。最近在做项目的时候发现，还是使用不同的配置文件比较方便，下面介绍一下如何通过不同的配置文件进行最小配置。当然，配置的目的就是为了方便开发、测试和上线。

好，下面上货。

1、先看一下目录结构：

![Center][]

2、首先是pom.xml

<properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <springframework.version>4.3.8.RELEASE</springframework.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
                <scope>test</scope>
            </dependency>
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${springframework.version}</version>
            </dependency>
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>${springframework.version}</version>
            </dependency>
    
        </dependencies>
    
        <profiles>
            <profile>
                <id>dev</id>
                <properties>
                    <db.driver>com.mysql.jdbc.Driver</db.driver>
                    <profileType>dev</profileType>
                </properties>
                <activation>
                    <activeByDefault>true</activeByDefault>
                </activation>
            </profile>
    
            <profile>
                <id>test</id>
                <properties>
                    <db.driver>com.oracle.jdbc.Driver</db.driver>
                    <profileType>test</profileType>
                </properties>
            </profile>
        </profiles>
    
        <build>
            <resources>
                
                <resource>
                    <directory>${project.basedir}/src/main/resource</directory>
                    <filtering>true</filtering>
                    <excludes>
                        <exclude>appConfig-dev.properties</exclude>
                        <exclude>appConfig-test.properties</exclude>
                    </excludes>
                </resource>
                <resource>
                    <directory>${project.basedir}/src/main/resource</directory>
                    <filtering>true</filtering>
                    <includes>
                        <include>appConfig-${profileType}.properties</include>
                    </includes>
                </resource>
            </resources>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <configuration>
                        <source>1.8</source>
                        <target>1.8</target>
                        <encoding>utf-8</encoding>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-shade-plugin</artifactId>
                    <version>3.0.0</version>
                    <executions>
                        <execution>
                            <phase>package</phase>
                            <goals>
                                <goal>shade</goal>
                            </goals>
                            <configuration>
                                <transformers>
                                    <transformer
                                            implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                        <mainClass>com.xueyou.demo.App</mainClass>
                                    </transformer>
                                </transformers>
                            </configuration>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>

3、看一下配置文件中的内容：

appConfig.properties

app.driver=${db.driver}
    app.encoding=${project.build.sourceEncoding}
    app.name=APPNAME

appConfig-dev.properties

app.profileType=test

appConfig-test.properties

app.profileType=test

4、在程序中访问配置文件：

package com.xueyou.demo;
    
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.beans.factory.config.ConfigurableBeanFactory;
    import org.springframework.context.annotation.Scope;
    import org.springframework.stereotype.Component;
    
    @Component
    @Scope(ConfigurableBeanFactory.SCOPE_SINGLETON)
    public final class AppConfig {
        @Value("${app.name}")
        private String appName;
    
        @Value("${app.driver}")
        private String driverName;
    
        @Value("${app.profileType}")
        private String profileType;
    
        public String getAppName() {
            return appName;
        }
    
        public String getDriverName() {
            return driverName;
        }
    
        public String getProfileType() {
            return profileType;
        }
    }

5、最后在主类中使用：

package com.xueyou.demo;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.annotation.*;
    
    
    /**
     * Hello world!
     */
    @Configuration
    @ComponentScan(basePackages = {"com.xueyou.demo"})
    @PropertySources({
    //        @PropertySource("classpath:appConfig-dev.properties"),
            @PropertySource("classpath:appConfig-test.properties")
    })
    public class App {
        public static void main(String[] args) {
            System.out.println("Hello World!");
            ApplicationContext applicationContext = new AnnotationConfigApplicationContext(com.xueyou.demo.App.class);
            AppConfig appConfig = applicationContext.getBean(AppConfig.class);
            System.out.println(appConfig.getAppName());
            System.out.println(appConfig.getDriverName());
            System.out.println(appConfig.getProfileType());
        }
    }

6、注意：

需要注意的是，在进行打包的时候需要指定当前maven运行的profile环境。

使用如下命令指定当前打包的jar包的profile环境：

mvn clean package -Pdev

mvn clean package -Ptest

[Center]: /images/20220614/0b25ddaeb2444ec885b8a3dff93cb878.png