使用maven打包時，報錯誤資訊：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.2:war (default-war) on project provider: Error assembling WAR: webxml attribute is required (or pre-existing WEB-INF/web.xml if executing in update mode) -> [Help 1]

提示缺少web.xml

解決辦法：

如果WebContent/WEB-INF/web.xml檔案存在，需要在pom.xml檔案中加上maven-war-plugin外掛

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.0.0</version>
                <configuration>
                    <webResources
 
>
                        <resource>
                            <directory>WebContent</directory>
                        </resource>
                    </webResources>
                </configuration>
            </plugin>
        </plugins>
</build>
 

　　
如果web.xml檔案不存在，則按下面的方式配置。

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.0.0</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
        </plugins>
</build>