maven profile filter 线上线下分开打包配置

maven自动选择不同的配置文件打包profile+filter

1. profile：

[要点：] activeByDefault默认激活，不用再mvn命令时指定额外参数；
[注意：] 使用非默认的配置，要在编译时指定：如，要在生产环境打包[并跳过单元测试]：
mvn clean package -Pproduct [-Dmaven.test.skip=ture]

如果mvn clean package:

a. 默认加载profile-dev.properties来打包

b. 可以替换的内容范围是：

src/main/resources/*.xml|*.properties...
src/main/java/*.xml

<project>
    <build>
        <finalName>project-namefinalName>
          
        <resources>  
            <resource>  
                <directory>src/main/resourcesdirectory>
                    <includes>
                        <include>**/*include>
                    includes>
                    <filtering>truefiltering>  
            resource>
            <resource>
                <directory>src/main/javadirectory>
                <includes>
                    <include>**/*.xmlinclude>
                includes>
            resource>
        resources>  
    build>

    <profiles>
        
        <profile>
            <id>devid>
            <activation>
                <activeByDefault>trueactiveByDefault>
            activation>
            <build>
                <filters>
                    <filter>profile-dev.propertiesfilter>
                filters>
            build>
        profile>

        
        <profile>
            <id>testid>
            <build>
                <filters>
                    <filter>profile-test.propertiesfilter>
                filters>
            build>
        profile>

        
        <profile>
            <id>uatid>
            <build>
                <filters>
                    <filter>profile-uat.propertiesfilter>
                filters>
            build>
        profile>

        
        <profile>
            <id>productid>
            <build>
                <filters>
                    <filter>profile-product.propertiesfilter>
                filters>
            build>
        profile>
    profiles>
project>

2. 用法：

比如profile-dev.properties文件中定义了

mvn.mysql.url.mydb=jdbc:mysql://localhost:3306/mydb
mvn.mysql.user.mydb=root
mvn.mysql.pass.mydb=1234

那么可以在其他公用配置文件中使用${}来引用profile-dev.properties中的属性，比如：
(1). db.properties中：

db.url=${mvn.mysql.url.mydb} 
db.user=${mvn.mysql.user.mydb}
db.pass=${mvn.mysql.pass.mydb}

(2) spring-ds.xml中：(用法1)

    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
        <property name="url" value="${mvn.mysql.url.mydb}"/>
        <property name="username" value="${mvn.mysql.user.mydb}"/>
        <property name="password" value="${mvn.mysql.pass.mydb}"/>
    bean>

spring-ds.xml中,也可以使用这样：(用法2-引用再引用)

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
        <property name="url" value="${db.url}"/>
        <property name="username" value="${db.user}"/>
        <property name="password" value="${db.pass}"/>
bean>