springboot maven属性文件过滤

淡淡的烟草味﹌ 2022-09-14 03:06 179阅读 0赞

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## sringboot maven属性文件过滤 ##

**官网：**[Maven – Maven Getting Started Guide][Maven _ Maven Getting Started Guide]

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**属性文件过滤**

Sometimes a resource file will need to contain a value that can only be 
    supplied at build time. 
    # 属性文件有时候会使用项目构建期间生成的属性
    
    To accomplish this in Maven, put a reference to the property that will 
    contain the value into your resource file using the syntax ${<property name>}. 
    # 属性文件可以用${<property name>}引用该变量
    # 如：application.properties
    # application.name=${project.name}
    # application.version=${project.version}
    
    The property can be one of the values defined in your pom.xml, a value defined 
    in the user's settings.xml, a property defined in an external properties file, 
    or a system property
    # property name来源：pom.xml、settings.xml、外部属性文件、系统变量

**开启文件过滤：pom.xml ==> build**

<build>
        <resources>
          <resource>
            <directory>src/main/resources</directory>  
            <filtering>true</filtering>                
                                                       
          </resource>
        </resources>
      </build>

**属性名称**

# pom.xml 属性
    ${project.name}：项目名称
    ${project.version}：项目版本
    ${project.build.finalName}：jar包名称
    ${project.basedir}：项目路径
    ${project.build.directory}：jar包目录，默认为：${project.basedir}/target
    
    # settings.xml 属性
    ${settings.localRepository}：用户本地仓库路径

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**示例**

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**配置文件**

**application.properties**

# pom.xml
    application.name=${project.name}
    application.version=${project.version}
    application.properties.value=${my.filter.value}
    
    # settings.xml
    setting.localRepository=${settings.localRepository}
    setting.usePluginRegistry=${settings.usePluginRegistry}
    
    # file properties
    filters.hello=${hello}
    filters.hello2=${hello2}
    
    # command line
    command.value=${commandLine.value}

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**项目构建文件**

**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 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>2.5.5</version>
            <relativePath/> 
        </parent>
        <groupId>com.example</groupId>
        <artifactId>demo</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <name>demo</name>
        <description>Demo project for Spring Boot</description>
        <properties>
            <java.version>11</java.version>
            <resource.delimiter>${}</resource.delimiter>
            <my.filter.value>hello</my.filter.value>
        </properties>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-configuration-processor</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
        <build>
            <finalName>hello</finalName>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <configuration>
                        <excludes>
                            <exclude>
                                <groupId>org.projectlombok</groupId>
                                <artifactId>lombok</artifactId>
                            </exclude>
                        </excludes>
                    </configuration>
                </plugin>
            </plugins>
    
            
            <filters>
                <filter>${basedir}/filters/filters.properties</filter>
                <filter>src/main/resources/filters/filters.properties</filter>
            </filters>
    
            
            <resources>
                <resource>
                    <directory>src/main/resources</directory>
                    <filtering>true</filtering>
                </resource>
            </resources>
        </build>
    
    </project>

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**项目打包**

**执行命令：**mvn package -DcommandLine.value=hello

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAb1_nk5znlLDmnY7kuItfbw_size_9_color_FFFFFF_t_70_g_se_x_16][]

**target/classes ==> application.properties**

# pom.xml
    application.name=demo
    application.version=0.0.1-SNAPSHOT
    application.properties.value=hello
    
    # settings.xml
    setting.localRepository=E:\\Program Files\\apache-maven-3.6.1-bin\\apache-maven-3.6.1\\repository
    setting.usePluginRegistry=false
    
    # file properties
    filters.hello=hello
    filters.hello2=hello2
    
    # command line
    command.value=hello

**属性文件替换成功**

[Maven _ Maven Getting Started Guide]: https://maven.apache.org/guides/getting-started/index.html
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