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

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：

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