maven配置
下载:https://maven.apache.org/download.cgi
下载这个(apache-maven-3.9.0-bin.zip)
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环境变量配置
MAVEN_HOME E:\IDEA\apache-maven-3.9.0
path 增加 %MAVEN_HOME%\bin
E:\IDEA\apache-maven-3.9.0\conf\settings.xml 要修改的地方
<localRepository>E:\IDEA\maven-repository</localRepository>
<mirror>
<id>aliyun</id>
<name>aliyun</name>
<mirrorOf>central</mirrorOf>
<!-- 国内推荐阿里云的Maven镜像 -->
<url>https://maven.aliyun.com/repository/central</url>
</mirror>
<profile>
<id>jdk-19</id>
<activation>
<activeByDefault>true</activeByDefault>
<jdk>19</jdk>
</activation>
<properties>
<maven.compiler.source>19</maven.compiler.source>
<maven.compiler.target>19</maven.compiler.target>
<maven.compiler.compilerVersion>19</maven.compiler.compilerVersion>
</properties>
</profile>

单个项目pom.xml
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>wtl.test</groupId>
<artifactId>wtl</artifactId>
<!-- 生成的包,有jar \ war, war用于web-->
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<!-- 模块名称,多模块引用有用到-->
<name>wtl Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<!-- compile 编译时需要用到该jar包(默认) -->
<!-- test 编译Test时需要用到该jar包 -->
<!-- runtime 编译时不需要,但运行时需要用到 -->
<!-- provided 编译时需要用到,但运行时由JDK或某个服务器提供-->
<scope>test</scope>
</dependency>
</dependencies>
<build>
<!-- 要填一个默认-->
<defaultGoal>compile</defaultGoal>
<!-- 编译后打包文件名,如这个会是wtl.war-->
<finalName>wtl</finalName>
<!-- 使用的编译插件-->
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>3.3.1</version>
</plugin>
</plugins>
</build>
<properties>
<!-- 编译的编码,中文要用UTF-8,这个是用于编译后的*.class里的文件的中文,不是浏览器请求说的那个中文-->
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<!-- 编译使用的JDK-->
<maven.compiler.source>19</maven.compiler.source>
<!-- 目标JDK-->
<maven.compiler.target>19</maven.compiler.target>
<java.version>19</java.version>
<spring.version>5.0.2.RELEASE</spring.version>
</properties>
</project>
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多模块
模块的就可以简化为
<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>
<parent>
<groupId>com.itranswarp.learnjava</groupId>
<artifactId>parent</artifactId>
<version>1.0</version>
<relativePath>../parent/pom.xml</relativePath>
</parent>
<artifactId>module-a</artifactId>
<packaging>jar</packaging>
<name>module-a</name>
</project>
模块B依赖A这样写
<dependencies>
<dependency>
<groupId>com.itranswarp.learnjava</groupId>
<artifactId>module-b</artifactId>
<version>1.0</version>
</dependency>
</dependencies>
根级别的pom.xml
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.itranswarp.learnjava</groupId>
<artifactId>build</artifactId>
<version>1.0</version>
<packaging>pom</packaging>
<name>build</name>
<modules>
<module>parent</module>
<module>module-a</module>
<module>module-b</module>
<module>module-c</module>
</modules>
</project>
servlet5.0的依赖
<dependency>
<groupId>jakarta.servlet</groupId>
<artifactId>jakarta.servlet-api</artifactId>
<version>5.0.0</version>
<scope>provided</scope>
</dependency>

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