[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.1.1:war

創建springboot項目，且不采用<parent>引入springboot時，pom.xml如下：

<?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>com.example</groupId>
<artifactId>demo-without-parent</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>

    <name>demo-without-parent</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
    </properties>

    <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-dependencies</artifactId> <version>2.0.2.RELEASE</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

 

執行

mvn clean install 

控制台報錯：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.1.1:war

原因：當設置為war時，web.xml必須存在。

解決：可通過插件配置屬性將其忽略。

首先，spring-boot-dependencies 這個pom文件，找到

<maven-war-plugin.version>3.1.0</maven-war-plugin.version>

找到版本號是3.1.0

然后，在項目的pom.xml中，加入

<plugin>
    <artifactId>maven-war-plugin</artifactId>
    <version>3.1.0</version>
</plugin>

版本號必須與spring-boot-dependencies中maven-war-plugin-version版本號一致。

再次運行mvn clean install ，提示打包成功。

在idea中，運行啟動類，成功啟動。但是

java -jar demo-without-parent-0.0.1-SNAPSHOT.war

提示：demo-without-parent-0.0.1-SNAPSHOT.war中沒有主清單屬性

因為，maven-war-plugin的確執行了，但是spring-boot-maven-plugin插件卻沒有執行，原因在於該插件未指定版本，故設置版本號，依舊是從spring-boot-dependencies中找對應的版本號：2.0.2.RELEASE

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <version>2.0.2.RELEASE</version>
    <executions>
        <execution>
            <goals>
                <goal>repackage</goal>
            </goals>
        </execution>
    </executions>
</plugin>

重新執行

mvn clean install ，

mvn clean install
java -jar demo-without-parent-0.0.1-SNAPSHOT.war

成功。

最后總結：

1）、maven-war-plugin插件新老版本差異：
    2.2：項目中WEB-INF下必須存在web.xml
    3.1.0:不需要依賴web.xml
    而且，版本號必須與所引入的spring-boot-dependencies下的maven-war-plugin版本號一致。

2）、spring-boot-maven-plugin插件需要配置repackage，否則不會添加spring boot 引導依賴，進而無法引導當前應用。

3）、根據使用習慣通常不會采用spring-boot-dependencies

 

附，完整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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>demo-without-parent</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>

    <name>demo-without-parent</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.0.2.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.0.2.RELEASE</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.1.0</version>
            </plugin>
        </plugins>
    </build>

</project>