<?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.bjsxt</groupId>
    <artifactId>nexusweb</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <distributionManagement>
        <repository>
            <!--需要与settings.xml 中server 的id 相同-->
            <id>releases</id>
            <name>Nexus Release Repository</name>
            <url>http://192.168.0.101:8081/nexus/content/repositories/releases/</url>
        </repository>
        <snapshotRepository>
            <!--需要与settings.xml 中server 的id 相同-->
            <id>snapshots</id>
            <name>Nexus Snapshot Repository</name>
            <url>http://192.168.0.101:8081/nexus/content/repositories/snapshots/</url>
        </snapshotRepository>
    </distributionManagement>
    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.2</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <path>/</path>
                    <port>8080</port>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-source-plugin</artifactId>
                <version>2.1.2</version>
                <executions>
                    <execution>
                        <id>attach-sources</id>
                        <goals>
                            <goal>jar</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

上传源码报如下错误

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

上传源码的时候报错 不知道什么情况 请老师指点下