在使用maven编译GWT时，WEB-INF / lib中缺少gwt-servlet.jar [英] gwt-servlet.jar missing in the WEB-INF/lib on compiling GWT with maven

问题描述

在我的pom文件中，我已经包含了gwt-servlet的依赖，但是如果我运行 mvn clean install 和 mvn eclipse：eclipse 并在eclipse中打开项目，我收到以下错误

GWT SDK JAR gwt-servlet.jar缺少WEB-INF / lib目录

编辑：
这是我的依赖一个自定义maven存储库）：

 <依赖关系> 
< groupId> com.google.gwt< / groupId> 
< artifactId> gwt-user< / artifactId> 
< version> 2.4.0< / version> 
< / dependency> 
<依赖关系> 
< groupId> com.google.gwt< / groupId> 
< artifactId> gwt-servlet< / artifactId> 
< version> 2.4.0< / version> 
< / dependency> 
<依赖关系> 
< groupId> com.smartgwt< / groupId> 
< artifactId> smart-gwt< / artifactId> 
< version> 2.5< / version> 
< / dependency> 
  

编辑2（主要pom）：

 < build> 
< extensions> 
< extension> 
< groupId> org.apache.maven.wagon< / groupId> 
< artifactId> wagon-ftp< / artifactId> 
< / extension> 
< / extensions> 
 .... 
  

解决方案

我注意到的事情

1）您指定的smartgw依赖关系无法从maven中央存储库中解析

 <依赖性> 
< groupId> com.smartgwt< / groupId> 
< artifactId> smart-gwt< / artifactId> 
< version> 2.5< / version> 
< / dependency> 
  

它只具有2.4版本的smartgw（请参阅这里 http://search.maven.org/#search%7Cga%7C1%7Csmartgwt ）相反，我不得不使用这个

 <依赖关系> 
< groupId> com.smartgwt< / groupId> 
< artifactId> smartgwt< / artifactId> 
< version> 2.4< / version> 
< / dependency> 
  

注意到工件ID也不同。 （如果你有一个包含这个的自定义存储库，那么请更新你的问题）

2）你不需要做eclipse：eclipse可以发出

文件>导入>现有的Maven项目

这将自动从您的pom.xml生成eclipse项目

更新

我用以下测试：

gwttest2文件夹中的父pom

 < project xmlns =http://maven.apache.org/POM/ 4.0.0xmlns：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.test< / groupId> 
< artifactId> gwttest2-main< / artifactId> 
< version> 0.0.1-SNAPSHOT< / version> 
< packaging> pom< / packaging> 
 
< modules> 
< module> gwttest2-module1< / module> 
< / modules> 
 
< build> 
< extensions> 
< extension> 
< groupId> org.apache.maven.wagon< / groupId> 
< artifactId> wagon-ftp< / artifactId> 
< / extension> 
< / extensions> 
< / build> 
 
 
<依赖关系> 
<依赖关系> 
< groupId> com.google.gwt< / groupId> 
< artifactId> gwt-user< / artifactId> 
< version> 2.4.0< / version> 
< / dependency> 
<依赖关系> 
< groupId> com.google.gwt< / groupId> 
< artifactId> gwt-servlet< / artifactId> 
< version> 2.4.0< / version> 
< / dependency> 
<依赖关系> 
< groupId> com.smartgwt< / groupId> 
< artifactId> smartgwt< / artifactId> 
< version> 2.4< / version> 
< / dependency> 
 
< / dependencies> 
 
< / project> 
  

gwttest2 / gwttest2-module1文件夹中的小孩pom

 < project xmlns =http://maven.apache.org/POM/4.0.0xmlns：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.test< / groupId> 
< artifactId> gwttest2-module1< / artifactId> 
< version> 0.0.1-SNAPSHOT< / version> 
< packaging> war< / packaging> 
< parent> 
< artifactId> gwttest2-main< / artifactId> 
< groupId> com.test< / groupId> 
< version> 0.0.1-SNAPSHOT< / version> 
< / parent> 
 
< build> 
< extensions> 
< extension> 
< groupId> org.apache.maven.wagon< / groupId> 
< artifactId> wagon-ftp< / artifactId> 
< / extension> 
< / extensions> 
< / build> 
 
 
<依赖关系> 
<依赖关系> 
< groupId> com.google.gwt< / groupId> 
< artifactId> gwt-user< / artifactId> 
< version> 2.4.0< / version> 
< / dependency> 
<依赖关系> 
< groupId> com.google.gwt< / groupId> 
< artifactId> gwt-servlet< / artifactId> 
< version> 2.4.0< / version> 
< / dependency> 
<依赖关系> 
< groupId> com.smartgwt< / groupId> 
< artifactId> smartgwt< / artifactId> 
< version> 2.4< / version> 
< / dependency> 
 
< / dependencies> 
 
< / project> 
  

In my pom file, I have included the dependency of gwt-servlet but if i run mvn clean install and mvn eclipse:eclipse and open the project in eclipse, I get the following error

GWT SDK JAR gwt-servlet.jar is missing in the WEB-INF/lib directory

EDIT : Here is my dependency (we use a custom maven repository):

<dependency>
    <groupId>com.google.gwt</groupId>
    <artifactId>gwt-user</artifactId>
    <version>2.4.0</version>
</dependency>
<dependency>
    <groupId>com.google.gwt</groupId>
    <artifactId>gwt-servlet</artifactId>
    <version>2.4.0</version>
</dependency>
<dependency>
    <groupId>com.smartgwt</groupId>
    <artifactId>smart-gwt</artifactId>
    <version>2.5</version>
</dependency>

EDIT 2 (main pom):

<build>
    <extensions>
      <extension>
        <groupId>org.apache.maven.wagon</groupId>
        <artifactId>wagon-ftp</artifactId>
      </extension>
    </extensions>
....

解决方案

There are two things I noticed.

1) The smartgw dependency you specified cannot be resolved from the maven central repository

<dependency>
    <groupId>com.smartgwt</groupId>
    <artifactId>smart-gwt</artifactId>
    <version>2.5</version>
</dependency>

It only has the 2.4 version of smartgw (see here http://search.maven.org/#search%7Cga%7C1%7Csmartgwt) Instead I had to use this

<dependency>
    <groupId>com.smartgwt</groupId>
    <artifactId>smartgwt</artifactId>
    <version>2.4</version>
</dependency>

notice that the artifact ID is different too. (If you have a custom repository containing this then please update your question)

2) You dont need to do eclipse:eclipse instead you can issue the

File > Import > Existing Maven projects

this will auto generate the eclipse project from your pom.xml

UPDATE

I tested with the following :

Parent pom in gwttest2 folder

<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.test</groupId>
    <artifactId>gwttest2-main</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>

    <modules>
        <module>gwttest2-module1</module>
    </modules>

    <build>
        <extensions>
            <extension>
                <groupId>org.apache.maven.wagon</groupId>
                <artifactId>wagon-ftp</artifactId>
            </extension>
        </extensions>
    </build>


    <dependencies>
        <dependency>
            <groupId>com.google.gwt</groupId>
            <artifactId>gwt-user</artifactId>
            <version>2.4.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.gwt</groupId>
            <artifactId>gwt-servlet</artifactId>
            <version>2.4.0</version>
        </dependency>
        <dependency>
            <groupId>com.smartgwt</groupId>
            <artifactId>smartgwt</artifactId>
            <version>2.4</version>
        </dependency>

    </dependencies>

</project>

child pom in gwttest2/gwttest2-module1 folder

<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.test</groupId>
    <artifactId>gwttest2-module1</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <parent>
        <artifactId>gwttest2-main</artifactId>
        <groupId>com.test</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <build>
        <extensions>
            <extension>
                <groupId>org.apache.maven.wagon</groupId>
                <artifactId>wagon-ftp</artifactId>
            </extension>
        </extensions>
    </build>


    <dependencies>
        <dependency>
            <groupId>com.google.gwt</groupId>
            <artifactId>gwt-user</artifactId>
            <version>2.4.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.gwt</groupId>
            <artifactId>gwt-servlet</artifactId>
            <version>2.4.0</version>
        </dependency>
        <dependency>
            <groupId>com.smartgwt</groupId>
            <artifactId>smartgwt</artifactId>
            <version>2.4</version>
        </dependency>

    </dependencies>

</project>

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