maven-2 - 如何告诉 jaxb/Maven 生成多个模式包？

Question

例子:

</plugin>       
       <plugin>
           <groupId>org.jvnet.jaxb2.maven2</groupId>
           <artifactId>maven-jaxb2-plugin</artifactId>
           <version>0.7.1</version>
           <executions>
             <execution>
               <goals>
                 <goal>generate</goal>
               </goals>
             </execution>
           </executions>
            <configuration>
             <schemaDirectory>src/main/resources/dir1</schemaDirectory>
              <schemaIncludes>
                  <include>schema1.xsd</include>
              </schemaIncludes>
              <generatePackage>schema1.package</generatePackage>
           </configuration>
         </plugin>
          <plugin>
           <groupId>org.jvnet.jaxb2.maven2</groupId>
           <artifactId>maven-jaxb2-plugin</artifactId>
           <version>0.7.1</version>
           <executions>
             <execution>
               <goals>
                 <goal>generate</goal>
               </goals>
             </execution>
           </executions>
            <configuration>
             <schemaDirectory>src/main/resources/dir2</schemaDirectory>
              <schemaIncludes>
                  <include>schema2.xsd</include>
              </schemaIncludes>
              <generatePackage>schema2.package</generatePackage>
           </configuration>
         </plugin>
       </plugins>

发生了什么:Maven 执行第一个插件。然后删除目标文件夹并创建第二个包，然后可见。

我尝试为第一个配置设置 target/somedir1，为第二个配置设置 target/somedir2。但行为没有改变？有任何想法吗？我不想直接在 src/main/java 文件夹中生成包，因为这些包是生成的，不应该与手动创建的类混合。

Answer 1

我必须指定不同的 generateDirectory (没有这个，插件认为文件是最新的，并且在第二次执行期间没有生成任何东西)。我建议关注 target/generated-sources/<tool>生成源的约定，以便它们将自动导入您喜欢的 IDE。我还建议声明几个execution而不是两次声明插件(并在每个 configuration 元素中移动 execution):

<plugin>
  <groupId>org.jvnet.jaxb2.maven2</groupId>
  <artifactId>maven-jaxb2-plugin</artifactId>
  <version>0.7.1</version>
  <executions>
    <execution>
      <id>schema1-generate</id>
      <goals>
        <goal>generate</goal>
      </goals>
      <configuration>
        <schemaDirectory>src/main/resources/dir1</schemaDirectory>
        <schemaIncludes>
          <include>shiporder.xsd</include>
        </schemaIncludes>
        <generatePackage>com.stackoverflow.package1</generatePackage>
        <generateDirectory>${project.build.directory}/generated-sources/xjc1</generateDirectory>
      </configuration>
    </execution>
    <execution>
      <id>schema2-generate</id>
      <goals>
        <goal>generate</goal>
      </goals>
      <configuration>
        <schemaDirectory>src/main/resources/dir2</schemaDirectory>
        <schemaIncludes>
          <include>books.xsd</include>
        </schemaIncludes>
        <generatePackage>com.stackoverflow.package2</generatePackage>
        <generateDirectory>${project.build.directory}/generated-sources/xjc2</generateDirectory>
      </configuration>
    </execution>
  </executions>
</plugin>

通过此设置，我在 mvn clean compile 之后得到以下结果

$ tree target/target/├── classes│   ├── com│   │   └── stackoverflow│   │       ├── App.class│   │       ├── package1│   │       │   ├── ObjectFactory.class│   │       │   ├── Shiporder.class│   │       │   ├── Shiporder$Item.class│   │       │   └── Shiporder$Shipto.class│   │       └── package2│   │           ├── BookForm.class│   │           ├── BooksForm.class│   │           ├── ObjectFactory.class│   │           └── package-info.class│   ├── dir1│   │   └── shiporder.xsd│   └── dir2│       └── books.xsd└── generated-sources    ├── xjc    │   └── META-INF    │       └── sun-jaxb.episode    ├── xjc1    │   └── com    │       └── stackoverflow    │           └── package1    │               ├── ObjectFactory.java    │               └── Shiporder.java    └── xjc2        └── com            └── stackoverflow                └── package2                    ├── BookForm.java                    ├── BooksForm.java                    ├── ObjectFactory.java                    └── package-info.java

这似乎是预期的结果。