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📜  Maven-Web应用程序

📅  最后修改于: 2020-11-12 04:57:13             🧑  作者: Mango

本章教您如何使用Maven管理基于Web的项目。在这里，您将学习如何创建/构建/部署和运行Web应用程序。

创建Web应用程序

为了创建一个简单的Java Web应用程序，我们将使用maven-archetype-webapp插件。因此，让我们打开命令控制台，转到C：\ MVN目录并执行以下mvn命令。

C:\MVN>mvn archetype:generate 
-DgroupId = com.companyname.automobile 
-DartifactId = trucks
-DarchetypeArtifactId = maven-archetype-webapp 
-DinteractiveMode = false

Maven将开始处理并将创建如下完整的基于Web的Java应用程序项目结构-

[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'archetype'.
[INFO] -------------------------------------------------------------------
[INFO] Building Maven Default Project
[INFO] task-segment: [archetype:generate] (aggregator-style)
[INFO] -------------------------------------------------------------------
[INFO] Preparing archetype:generate
[INFO] No goals needed for project - skipping
[INFO] [archetype:generate {execution: default-cli}]
[INFO] Generating project in Batch mode
[INFO] --------------------------------------------------------------------
[INFO] Using following parameters for creating project
from Old (1.x) Archetype: maven-archetype-webapp:1.0
[INFO] --------------------------------------------------------------------

[INFO] Parameter: groupId, Value: com.companyname.automobile
[INFO] Parameter: packageName, Value: com.companyname.automobile
[INFO] Parameter: package, Value: com.companyname.automobile
[INFO] Parameter: artifactId, Value: trucks
[INFO] Parameter: basedir, Value: C:\MVN
[INFO] Parameter: version, Value: 1.0-SNAPSHOT

[INFO] project created from Old (1.x) Archetype in dir: C:\MVN\trucks

[INFO] -------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] -------------------------------------------------------------------

[INFO] Total time: 16 seconds
[INFO] Finished at: Tue Jul 17 11:00:00 IST 2012
[INFO] Final Memory: 20M/89M
[INFO] -------------------------------------------------------------------

现在转到C：/ MVN目录。您将看到一个创建的Java应用程序项目，命名为trucks(在artifactId中指定)，如以下快照所示。以下目录结构通常用于Web应用程序-

Java Web应用程序项目结构

Maven使用标准的目录布局。使用上面的示例，我们可以了解以下关键概念-

Sr.No. Folder Structure & Description
1

trucks

contains src folder and pom.xml.
2

src/main/webapp

contains index.jsp and WEB-INF folder.
3

src/main/webapp/WEB-INF

contains web.xml
4

src/main/resources

it contains images/properties files.

POM.xml


   4.0.0
   com.companyname.automobile
   trucks
   war
   1.0-SNAPSHOT
   trucks Maven Webapp
   http://maven.apache.org
   
      
         junit
         junit
         3.8.1
         test
       
   
   
      trucks

如果您进行观察，您会发现Maven还创建了一个示例JSP Source文件。

打开C：\> MVN> trucks> src> main> webapp>文件夹以使用以下代码查看index.jsp-

Hello World!

构建Web应用程序

让我们打开命令控制台，转到C：\ MVN \ trucks目录并执行以下mvn命令。

C:\MVN\trucks>mvn clean package

Maven将开始构建该项目。

[INFO] Scanning for projects...
[INFO] -------------------------------------------------------------------
[INFO] Building trucks Maven Webapp
[INFO] task-segment: [clean, package]
[INFO] -------------------------------------------------------------------
[INFO] [clean:clean {execution: default-clean}]
[INFO] [resources:resources {execution: default-resources}]

[WARNING] Using platform encoding (Cp1252 actually) to
copy filtered resources,i.e. build is platform dependent!

[INFO] Copying 0 resource
[INFO] [compiler:compile {execution: default-compile}]
[INFO] No sources to compile
[INFO] [resources:testResources {execution: default-testResources}]

[WARNING] Using platform encoding (Cp1252 actually) to
copy filtered resources,i.e. build is platform dependent!

[INFO] skip non existing resourceDirectory
C:\MVN\trucks\src\test\resources
[INFO] [compiler:testCompile {execution: default-testCompile}]
[INFO] No sources to compile
[INFO] [surefire:test {execution: default-test}]
[INFO] No tests to run.
[INFO] [war:war {execution: default-war}]
[INFO] Packaging webapp
[INFO] Assembling webapp[trucks] in [C:\MVN\trucks\target\trucks]
[INFO] Processing war project
[INFO] Copying webapp resources[C:\MVN\trucks\src\main\webapp]
[INFO] Webapp assembled in[77 msecs]
[INFO] Building war: C:\MVN\trucks\target\trucks.war
[INFO] -------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] -------------------------------------------------------------------
[INFO] Total time: 3 seconds
[INFO] Finished at: Tue Jul 17 11:22:45 IST 2012
[INFO] Final Memory: 11M/85M
[INFO] -------------------------------------------------------------------

部署Web应用程序

现在，将在C：\> MVN> trucks> target>文件夹中创建的trucks.war复制到Web服务器的webapp目录中，然后重新启动Web服务器。

测试Web应用程序

使用URL运行Web应用程序： http：// <服务器名称>：<端口号> /trucks/index.jsp 。

验证输出。

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