Question

我按照gwt-maven-plugin的说明生成，然后导入下面的项目，

1）生成项目

$ mvn archetype:generate \
   -DarchetypeGroupId=org.codehaus.mojo \
   -DarchetypeArtifactId=gwt-maven-plugin \
   -DarchetypeVersion=2.5.0

...

Define value for property 'groupId': : org.codehaus.mojo
Define value for property 'artifactId': : gwt-maven-plugin-sample
Define value for property 'version':  1.0-SNAPSHOT: : 
Define value for property 'package':  org.codehaus.mojo: : 
Define value for property 'module': : Sample 

...

2）检查生成的POM

<?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/maven-v4_0_0.xsd">

  <!-- POM file generated with GWT webAppCreator -->
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.codehaus.mojo</groupId>
  <artifactId>gwt-maven-plugin-sample</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>GWT Maven Archetype</name>

  <properties>
    <!-- Convenience property to set the GWT version -->
    <gwtVersion>2.5.0</gwtVersion>
    <!-- GWT needs at least java 1.5 -->
    <webappDirectory>${project.build.directory}/${project.build.finalName}</webappDirectory>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <dependency>
      <groupId>com.google.gwt</groupId>
      <artifactId>gwt-servlet</artifactId>
      <version>${gwtVersion}</version>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>com.google.gwt</groupId>
      <artifactId>gwt-user</artifactId>
      <version>${gwtVersion}</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.7</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>javax.validation</groupId>
      <artifactId>validation-api</artifactId>
      <version>1.0.0.GA</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>javax.validation</groupId>
      <artifactId>validation-api</artifactId>
      <version>1.0.0.GA</version>
      <classifier>sources</classifier>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <!-- Generate compiled stuff in the folder used for developing mode -->
    <outputDirectory>${webappDirectory}/WEB-INF/classes</outputDirectory>

    <plugins>

      <!-- GWT Maven Plugin -->
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>gwt-maven-plugin</artifactId>
        <version>2.5.0</version>
        <executions>
          <execution>
            <goals>
              <goal>compile</goal>
              <goal>test</goal>
              <goal>i18n</goal>
              <goal>generateAsync</goal>
            </goals>
          </execution>
        </executions>
        <!-- Plugin configuration. There are many available options, see 
          gwt-maven-plugin documentation at codehaus.org -->
        <configuration>
          <runTarget>Sample.html</runTarget>
          <hostedWebapp>${webappDirectory}</hostedWebapp>
          <i18nMessagesBundle>org.codehaus.mojo.client.Messages</i18nMessagesBundle>
        </configuration>
      </plugin>

      <!-- Copy static web files before executing gwt:run -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.1.1</version>
        <executions>
          <execution>
            <phase>compile</phase>
            <goals>
              <goal>exploded</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <webappDirectory>${webappDirectory}</webappDirectory>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.3.2</version>
        <configuration>
          <source>1.5</source>
          <target>1.5</target>
        </configuration>
      </plugin>
    </plugins>
  </build>

</project>

3）检查生成的项目

gwt-maven-plugin-sample/
├── .classpath
├── pom.xml
├── .project
├── SampleTest-dev.launch
├── SampleTest-prod.launch
├── .settings
│   ├── com.google.appengine.eclipse.core.prefs
│   ├── com.google.gdt.eclipse.core.prefs
│   ├── com.google.gwt.eclipse.core.prefs
│   ├── .jsdtscope
│   ├── org.eclipse.jdt.core.prefs
│   ├── org.eclipse.wst.common.component
│   ├── org.eclipse.wst.common.project.facet.core.xml
│   ├── org.eclipse.wst.jsdt.ui.superType.container
│   └── org.maven.ide.eclipse.prefs
├── src
│   ├── main
│   │   ├── java
│   │   │   └── org
│   │   │       └── codehaus
│   │   │           └── mojo
│   │   │               ├── client
│   │   │               │   ├── GreetingService.java
│   │   │               │   └── Sample.java
│   │   │               ├── server
│   │   │               │   └── GreetingServiceImpl.java
│   │   │               └── shared
│   │   │                   └── FieldVerifier.java
│   │   ├── resources
│   │   │   └── org
│   │   │       └── codehaus
│   │   │           └── mojo
│   │   │               ├── client
│   │   │               │   ├── Messages_fr.properties
│   │   │               │   └── Messages.properties
│   │   │               └── Sample.gwt.xml
│   │   └── webapp
│   │       ├── Sample.css
│   │       ├── Sample.html
│   │       └── WEB-INF
│   │           └── web.xml
│   └── test
│       ├── java
│       │   └── org
│       │       └── codehaus
│       │           └── mojo
│       │               └── client
│       │                   └── GwtTestSample.java
│       └── resources
│           └── org
│               └── codehaus
│                   └── mojo
│                       └── SampleJUnit.gwt.xml
└── target
    └── generated-sources
        └── gwt
            └── org
                └── codehaus
                    └── mojo

33 directories, 26 files

4）在Eclipse上，选择“将现有项目导入工作区”

imported eclipse project

5）根据gwt-maven-plugin的指示，导入的项目应该产生类似于下面的项目结构，

expected eclipse project

最后通过比较4）到5），看来问题似乎根本没有添加maven依赖项，换句话说，生成的项目没有被验证为maven项目。那么，上面的步骤和下面的配置有什么问题？

gwt-maven-plugin 2.5.0
m2e 1.2.0.20120903-1050
eclipse 3.7.2
maven 3.0.4

@EDIT

“mvn gwt：run”成功，但未能DevMode启动GWT Eclipse Plugin，

gwt devmode error

@EDIT 2

参考@Sachin Shekhar R的链接，我查看了the official GWT Wiki: working with maven，按照说明进行了测试DynaTable RequestFactory sample。太好了，它确实有效！

不幸的是，Wiki回应gwt-maven-plugin确实存在使用archetype的问题。

Answer 1

gwt-maven-plugin 2.5.0最适合GWT 2.5.0。语句Ran“mvn gwt：run”成功，但未能通过GWT Eclipse插件启动DevMode有点令人困惑。

我也注意到了你的情况 -

1）生成的pom文件表示2.5.0，eclipse截图表示2.0.4。这可能是因为您的GPE指向GWT 2.0.4并覆盖了pom files指令。

2）如果您正在使用maven gwt：run，则GWT Eclipse插件无关紧要。开发模式由

启动 either

a）mvn gwt:run
b）当您右键单击项目并选择Debug As - ＆gt;时，通过GWT Eclipse插件Web Application

3）Maven依赖关系显示在您共享的屏幕截图中。你可以扩展它并验证哪些罐子被拿起。

Edit - 您可以使用http://code.google.com/p/google-web-toolkit/wiki/WorkingWithMaven

尝试一些其他问题排查提示

我的猜测是配置 @ Project properties, Google > Web Application, the "This project has a WAR directory"

导入由gwt-maven-plugin生成的项目

1 个答案: