Question

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>ABC</groupId>
<artifactId>ABCSPA</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<build>
    <finalName>ABCSPA</finalName>
    <plugins>
        <plugin>
            <groupId>org.apache.tomcat.maven</groupId>
            <artifactId>tomcat7-maven-plugin</artifactId>
            <version>2.1</version>
            <configuration>
                <port>8080</port>
                <path>${project.build.finalName}</path>
                <server>tomcatserver</server>
                <url>http://localhost:8080/manager/text</url>
                <username>admin</username>
                <password>admin</password>
                <additionalConfigFilesDir>${basedir}/src/main/tomcat/conf</additionalConfigFilesDir>
                <systemProperties>
                    <log4j.configuration>file:./src/main/tomcat/conf/log4j.xml</log4j.configuration>
                </systemProperties>
            </configuration>
            <dependencies>
                <dependency>
                    <groupId>log4j</groupId>
                    <artifactId>log4j</artifactId>
                    <version>1.2.16</version>
                </dependency>
                <dependency>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-simple</artifactId>
                    <version>1.6.1</version>
                </dependency>
                <dependency>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                    <version>1.7.1</version>
                </dependency>
                <dependency>
                    <groupId>postgresql</groupId>
                    <artifactId>postgresql</artifactId>
                    <version>9.1-901-1.jdbc4</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-expression</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-jdbc</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-orm</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-tx</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-web</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-webmvc</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-aop</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-aspects</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-beans</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-context</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-context-support</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-core</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-expression</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework.security</groupId>
                    <artifactId>spring-security-acl</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework.security</groupId>
                    <artifactId>spring-security-aspects</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework.security</groupId>
                    <artifactId>spring-security-config</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework.security</groupId>
                    <artifactId>spring-security-core</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework.security</groupId>
                    <artifactId>spring-security-core-tiger</artifactId>
                    <version>2.0.8.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework.security</groupId>
                    <artifactId>spring-security-crypto</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework.security</groupId>
                    <artifactId>spring-security-ldap</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework.security</groupId>
                    <artifactId>spring-security-openid</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                <depenency>
                    <groupId>org.springframework.security</groupId>
                    <artifactId>spring-security-remoting</artifactId>
                    <version>3.2.5.RELEASE</version>
                </dependency>
                    <dependency>
                        <groupId>org.springframework.security</groupId>
                        <artifactId>spring-security-taglibs</artifactId>
                        <version>3.2.5.RELEASE</version>
                    </dependency>
                    <dependency>
                        <groupId>org.springframework.security</groupId>
                        <artifactId>spring-security-web</artifactId>
                        <version>3.2.5.RELEASE</version>
                    </dependency>
                    <dependency>
                        <groupId>org.springframework.data</groupId>
                        <artifactId>spring-data-jpa</artifactId>
                        <version>1.2.0.RELEASE</version>
                    </dependency>
            </dependencies>
        </plugin>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>sonar-maven-plugin</artifactId>
            <version>2.7.1</version>
        </plugin>
    </plugins>
</build>
<dependencies>
    <!-- Hibernate -->
    <dependency>
        <groupId>org.hibernate.javax.persistence</groupId>
        <artifactId>hibernate-jpa-2.0-api</artifactId>
        <version>1.0.1.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>4.2.4.Final</version>
        <exclusions>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <!-- Spring -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>3.1.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>3.1.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>3.1.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-core</artifactId>
        <version>3.1.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-config</artifactId>
        <version>3.1.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-taglibs</artifactId>
        <version>3.1.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-web</artifactId>
        <version>3.1.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>3.1.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>3.2.3.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-oxm</artifactId>
        <version>3.1.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-jpa</artifactId>
        <version>1.2.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>cglib</groupId>
        <artifactId>cglib</artifactId>
        <version>2.2</version>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjrt</artifactId>
        <version>1.7.0</version>
    </dependency>

    <!-- JSon -->
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-jaxrs</artifactId>
        <version>1.8.2</version>
    </dependency>

    <!-- Tiles -->
    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-api</artifactId>
        <version>2.2.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-core</artifactId>
        <version>2.2.2</version>
        <exclusions>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>jcl-over-slf4j</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-jsp</artifactId>
        <version>2.2.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-servlet</artifactId>
        <version>2.2.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-template</artifactId>
        <version>2.2.2</version>
    </dependency>

    <!-- Servlet -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.0.1</version>
        <scope>provided</scope>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>javax.servlet.jsp</groupId>
        <artifactId>jsp-api</artifactId>
        <version>2.2</version>
        <scope>provided</scope>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>

    <!-- Utilities -->
    <dependency>
        <groupId>commons-lang</groupId>
        <artifactId>commons-lang</artifactId>
        <version>2.4</version>
    </dependency>
    <dependency>
        <groupId>com.google.guava</groupId>
        <artifactId>guava</artifactId>
        <version>10.0.1</version>
    </dependency>

    <!-- Log -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.1</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.16</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <artifactId>commons-logging</artifactId>
        <groupId>commons-logging</groupId>
        <version>1.1.1</version>
    </dependency>

    <!-- Junit -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.11</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>3.2.5.RELEASE</version>
    </dependency>
</dependencies>
</project>

在pom.xml中生成的文件夹列表：

Apache的Tomcat的行家-插件
类
产生来源
产生测试来源
M2E-WTP
行家存档器
行家状态
万无一失
测试的类
ABCSPA
Tomcat的
ABCSPA.war

有人可以解释为什么要生成所有这些文件夹吗？例如：在'generated-sources'中，有一个文件夹'annotation'，它是一个空文件夹。

Answer 1

在Maven中，target文件夹旨在成为Maven的工作版本目录。此文件夹本质上是临时的。逻辑是该文件夹包含生成的数据，即Maven在构建时创建的数据。永远不应该将永久数据存储在此文件夹中（推论是该文件夹的条目永远不会受版本控制）。由于将生成此数据，因此在构建之前删除它应该是安全的。

引自Maven docs：

示例是构建目录，即target。

此目录在Super POM中定义，这意味着所有Maven项目（除非它们覆盖属性project.build.directory）都将包含此文件夹。

因此，在构建过程中生成的内容仅取决于您的POM是什么以及您的构建是如何发生的。尝试解释那里的所有条目太宽泛了（我确信其中很多都没有记录，因为它们实际上是每个插件的临时内部细节）。内部有一些条目是常见的：

maven-compiler-plugin默认情况下会生成文件夹generated-sources/annotations，因为它是属性generatedSourcesDirectory的默认值
target/classes对应于Super POM的project.build.outputDirectory。它将包含maven-compiler-plugin。
maven-war-plugin默认情况下会在此文件夹中生成战争，因为它是outputDirectory属性的默认值。

由于此文件夹应保持临时性，maven-clean-plugin的目的是清除它：

clean:clean尝试清除我们在构建时生成的文件的项目工作目录。默认情况下，它会发现并删除project.build.directory，project.build.outputDirectory，project.build.testOutputDirectory和project.reporting.outputDirectory中配置的目录。

请注意，在每次构建之前调用maven-clean-plugin删除这些工作目录是一个好习惯（不这样做会导致奇怪的编译行为，比如能够编译不应该编译的代码）。

关于文件夹m2e-wtp的特别说明：这是M2Eclipse特定文件夹。它的存在仅与整合Maven的Eclipse插件有关（因此它本身并不与Maven本身相关联。）

Maven的输出构建

1 个答案: