【Maven】Maven部署Web项目报错webxml attribute is required 【Build】

webxml attribute is required问题 mvn install一个web项目时，报错如下：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.1.1:war (default-war) on project com.alpha.webapp: Error assembling WAR: webxml attribute is required (or pre-existing WEB-INF/web.xml if executing in update mode) -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

原因：
maven的web项目默认的webroot是在src\main\webapp。如果在此目录下找不到web.xml就抛出以上的异常。

解决：

需要在pom.xml中增加配置，如下：

simple-webapp org.apache.maven.plugins maven-war-plugin 2.1.1 WebContent

或者增加配置，如下：

simple-webapp org.apache.maven.plugins maven-war-plugin 2.1.1 WebContent\WEB-INF\web.xml

WebContent配置为网站根目录，例如本例的目录为：
【【Maven】Maven部署Web项目报错webxml attribute is required】

现在mvn install该项目就能构建成功：

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. [INFO] Scanning for projects... [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building com.alpha.webapp 0.0.1-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-clean-plugin:2.4.1:clean (default-clean) @ com.alpha.webapp --- [INFO] Deleting D:\Users\axpss\workspace\com.alpha.webapp\target [INFO] [INFO] --- maven-resources-plugin:2.5:resources (default-resources) @ com.alpha.webapp --- [debug] execute contextualize [WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] Copying 0 resource [INFO] [INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ com.alpha.webapp --- [WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent! [INFO] Compiling 1 source file to D:\Users\axpss\workspace\com.alpha.webapp\target\classes [INFO] [INFO] --- maven-resources-plugin:2.5:testResources (default-testResources) @ com.alpha.webapp --- [debug] execute contextualize [WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] Copying 0 resource [INFO] [INFO] --- maven-compiler-plugin:2.3.2:testCompile (default-testCompile) @ com.alpha.webapp --- [INFO] Not compiling test sources [INFO] [INFO] --- maven-surefire-plugin:2.10:test (default-test) @ com.alpha.webapp --- [INFO] Tests are skipped. [INFO] [INFO] --- maven-war-plugin:2.1.1:war (default-war) @ com.alpha.webapp --- [INFO] Packaging webapp [INFO] Assembling webapp [com.alpha.webapp] in [D:\Users\axpss\workspace\com.alpha.webapp\target\simple-webapp] [INFO] Processing war project [INFO] Copying webapp webResources [D:\Users\axpss\workspace\com.alpha.webapp\WebContent] to [D:\Users\axpss\workspace\com.alpha.webapp\target\simple-webapp] [INFO] Copying webapp resources [D:\Users\axpss\workspace\com.alpha.webapp\src\main\webapp] [INFO] Webapp assembled in [32 msecs] [INFO] Building war: D:\Users\axpss\workspace\com.alpha.webapp\target\simple-webapp.war [WARNING] Warning: selected war files include a WEB-INF/web.xml which will be ignored (webxml attribute is missing from war task, or ignoreWebxml attribute is specified as 'true') [INFO] [INFO] --- maven-install-plugin:2.3.1:install (default-install) @ com.alpha.webapp --- [INFO] Installing D:\Users\axpss\workspace\com.alpha.webapp\target\simple-webapp.war to D:\dev\maven-repo\com\alpha\com.alpha.webapp\0.0.1-SNAPSHOT\com.alpha.webapp-0.0.1-SNAPSHOT.war [INFO] Installing D:\Users\axpss\workspace\com.alpha.webapp\pom.xml to D:\dev\maven-repo\com\alpha\com.alpha.webapp\0.0.1-SNAPSHOT\com.alpha.webapp-0.0.1-SNAPSHOT.pom [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 1.078s [INFO] Finished at: Thu Mar 28 15:55:56 CST 2013 [INFO] Final Memory: 7M/17M [INFO] ------------------------------------------------------------------------

将war部署到JBoss
从本地Maven库中找到com.alpha.webapp-0.0.1-SNAPSHOT.war，拷贝到JBoss/server/*/deploy目录。
如果已打开JBoss，因为支持热部署，马上就能在控制台看到如下信息，表明部署成功：

打开网页，看效果：

com.alpha.webapp-0.0.1-SNAPSHOT是war文件名称，hello是web.xml中定义的