[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.1.1:war
创建springboot项目,且不采用<parent>引入springboot时,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>
执行
mvn clean install
控制台报错:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.1.1:war
原因:当设置为war时,web.xml必须存在。
解决:可通过插件配置属性将其忽略。
首先,spring-boot-dependencies 这个pom文件,找到
<maven-war-plugin.version>3.1.0</maven-war-plugin.version>
找到版本号是3.1.0
然后,在项目的pom.xml中,加入
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.1.0</version>
</plugin>
版本号必须与spring-boot-dependencies中maven-war-plugin-version版本号一致。
再次运行mvn clean install ,提示打包成功。
在idea中,运行启动类,成功启动。但是
java -jar demo-without-parent-0.0.1-SNAPSHOT.war 提示:demo-without-parent-0.0.1-SNAPSHOT.war中没有主清单属性
因为,maven-war-plugin的确执行了,但是spring-boot-maven-plugin插件却没有执行,原因在于该插件未指定版本,故设置版本号,依旧是从spring-boot-dependencies中找对应的版本号: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>
重新执行
mvn clean install ,
mvn clean install
java -jar demo-without-parent-0.0.1-SNAPSHOT.war
成功。
最后总结:
1)、maven-war-plugin插件新老版本差异:
2.2:项目中WEB-INF下必须存在web.xml
3.1.0:不需要依赖web.xml
而且,版本号必须与所引入的spring-boot-dependencies下的maven-war-plugin版本号一致。 2)、spring-boot-maven-plugin插件需要配置repackage,否则不会添加spring boot 引导依赖,进而无法引导当前应用。 3)、根据使用习惯通常不会采用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>
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