4

这是我的示例程序,在使用 mvn 编译时它会抛出编译错误,我正在尝试使用 ExpandoMetaClass 添加静态方法 -

@Singleton
        class ThrowError {
            def parse ()
            {
                println "Anish"
            }

        }
        ThrowError.metaClass.static.getMap = {m_var -> ThrowError.instance.parse(m_var) }

我正在使用 gmaven 插件编译项目,同时发出 mvn compile ..........

[ERROR] Failed to execute goal org.codehaus.gmaven:gmaven-plugin:1.2:generateStubs (default) on project TestExpandoMetaClass: startup failed:
[ERROR] /C:/groovy/ThrowError.groovy: 4
: Invalid duplicate class definition of class ThrowError : The source /C:/groovy/ThrowError.groovy contains at least two definitions of the class ThrowError.
**[ERROR] One of the classes is a explicit generated class using the class statement, the other is a class generated from the s
cript body based on the file name. Solutions are to change the file name or to change the class name.**
[ERROR] @ line 4, column 1.
[ERROR] @Singleton
[ERROR] ^
[ERROR]
[ERROR] 1 error
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.gmaven:gmaven-plugin:1.2:generate
Stubs (default) on project TestExpandoMetaClass: startup failed:
/C:/groovyThrowError.groovy: 4: Invali
d duplicate class definition of class ThrowError : The source /groovy/ThrowError.groovy contains at least two definitions of the class ThrowError

这是我的 pom.xml 条目 gmaven 构建插件条目

    <project>
............
............
    <build>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <configuration>
                        <source>1.6</source>
                        <target>1.6</target>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.codehaus.mojo</groupId>
                    <artifactId>exec-maven-plugin</artifactId>
                    <version>1.1</version>
                    <executions>
                        <execution>
                            <goals>
                                <goal>java</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
                <plugin>
                    <groupId>org.codehaus.gmaven</groupId>
                    <artifactId>gmaven-plugin</artifactId>
                    <version>1.2</version>
                    <configuration>
                        <providerSelection>1.7</providerSelection>
                    </configuration>
                    <dependencies>
                        <dependency>
                            <groupId>org.codehaus.gmaven.runtime</groupId>
                            <artifactId>gmaven-runtime-1.7</artifactId>
                            <version>1.2</version>
                        </dependency>
                        <dependency>
                            <groupId>org.codehaus.groovy</groupId>
                            <artifactId>groovy-all</artifactId>
                            <version>1.7.2</version>
                        </dependency>
                    </dependencies>
                    <executions>
                        <execution>
                            <goals>
                                <goal>generateStubs</goal>
                                <goal>compile</goal>
                                <goal>generateTestStubs</goal>
                                <goal>testCompile</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
..........
..........
    </project>
4

1 回答 1

9

这里的答案与 Groovy 邮件列表中的答案相同,可能需要更多解释......在 Groovy 中,我们有脚本和类。类是具有类结构的所有事物,就像在 Java 中一样。例如 class B{} 是一个类结构并定义了一个类 B。脚本也是类,但它们不是这样的结构。如果你现在有“class B{}; def b = new B()”,那么你就有了 B 的类结构,还有一个内容为“def b = new B()”的脚本。正如我所说,这也是一个类,但是那个类的名称是什么?该名称由文件的名称定义,该脚本在其中定义(如果没有文件,则选择像 script1456 这样的名称)。现在您可以创建一个 B.groovy,其内容为“class B{}; def b = new B()”。将有一个名为 B 的类和一个具有相同名称的脚本。这是一个冲突。

如果你给文件一个不同的名字,你就很好了。

于 2011-11-01T18:18:29.733 回答