maven-编译器-插件:每次执行更改<outputDirectory>

Question

情况

我需要在我的GUI (JavaXF)和我的JavaStoredProcedures中的oracle12c数据库中处理这些文件。

在GUI中，我想使用属性绑定。因此，我配置了maven-jaxb2-plugin以生成具有属性的源。

另一方面，数据库不支持Java8，因此为maven-jaxb2插件配置了第二个execution，以生成在不同文件夹中没有属性的源，最终在不同文件夹中的相同包中包含相同execution类的两个文件夹。

所以我现在看到的是：

 project
 \-target
   \-generated-sources
     +-java7
     | \-package.with.java.files
     |   \-Java7-compilabe-sources*
     \-java8
       \-package.with.java.files
         \-Java8-compilabe-sources*

接下来我要做的是将两个文件夹( target/generated-sources/java7和target/generated-sources/java8 )编译到不同的输出文件夹中，target/java7/classes和target/java8/classes分别在不同的maven编译器插件执行过程中进行编译。

但我无法将maven编译器插件的输出目录更改为一次执行。

这是我当前maven编译器插件的配置。

  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <configuration>
      <verbose>true</verbose>
      <fork>true</fork>
      <encoding>ISO-8859-1</encoding>
    </configuration>
    <executions>
     <execution>
      <id>java8</id>
      <configuration>
        <source>1.8</source>
        <target>1.8</target>
        <executable>${jdk-1.8}/bin/javac</executable>
        <compilerVersion>1.8</compilerVersion>
        <sourceDirectory>${project.build.directory}/generated-sources/java8</sourceDirectory>
        <outputDirectory>${basedir}/target/java8/classes</outputDirectory>
      </configuration>
     </execution>
    </executions>
  </plugin>

但是从maven输出来看，它似乎既不尊重<sourceDirectory>，也不尊重<outputDirectory>。

[INFO] ------------------------------------------------------------------------
[INFO] Building MyProject 6.0.5
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ MyProject ---
[INFO] Deleting /ProjectRoot/target
[INFO]
[INFO] --- maven-jaxb2-plugin:0.13.1:generate (Java8) @ MyProject ---
[INFO] Up-to-date check for source resources [[file:/ProjectRoot/src/main/xsd/parad.xsd, file:/ProjectRoot/src/main/xjb/bindings.xml, file:/ProjectRoot/pom.xml]] and target resources [[]].
[INFO] Sources are not up-to-date, XJC will be executed.
[INFO] Episode file [/ProjectRoot/target\generated-sources\java8\META-INF\sun-jaxb.episode] was augmented with if-exists="true" attributes.
[INFO]
[INFO] --- maven-jaxb2-plugin:0.13.1:generate (Java7) @ MyProject ---
[INFO] Up-to-date check for source resources [[file:/ProjectRoot/src/main/xsd/parad.xsd, file:/ProjectRoot/src/main/xjb/bindings.xml, file:/ProjectRoot/pom.xml]] and target resources [[]].
[INFO] Sources are not up-to-date, XJC will be executed.
[INFO] Episode file [/ProjectRoot/target\generated-sources\java7\META-INF\sun-jaxb.episode] was augmented with if-exists="true" attributes.
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ MyProject ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 1 resource
[INFO] Copying 1 resource
[INFO] Copying 1 resource
[INFO] Copying 1 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ MyProject ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 114 source files to /ProjectRoot/target\classes

调查结果

• 编译器插件不显示执行ID (就像maven-jaxb2-plugin那样)
• 编译器插件编译target/generated-sources/java7和target/generated-sources/java8 (每个都包含57个*.java文件)，尽管<sourceDirectory>是在execution/config中提供的。
• 编译器插件编译为target/classes，尽管<outputDirectory>是在execution/config中给出的

问题

如何强制maven将每个target/generated-sources/java7和target/generated-sources/java8分别编译到自己的目标文件夹中？

附加信息

$ mvn --version
Apache Maven 3.3.3 (7994120775791599e205a5524ec3e0dfe41d4a06; 2015-04-22T13:57:37+02:00)

Answer 1

我通过升级maven-antrun插件解决了这个问题。

首先，我通过排除所有文件来关闭编译：

    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <configuration>
      <verbose>true</verbose>
      <fork>true</fork>
      <encoding>ISO-8859-1</encoding>
      <source>1.8</source>
      <target>1.8</target>
      <executable>${jdk-1.8}/bin/javac</executable>
      <compilerVersion>1.8</compilerVersion>
      <excludes>
        <exclude>**/*.*</exclude>
      </excludes>
    </configuration>

我还翻了一下maven-jar-plugin

    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jar-plugin</artifactId>
    <version>3.0.2</version>
    <executions>
      <execution>
        <id>default-jar</id>
        <phase>never</phase>
        <configuration>
          <finalName>unwanted</finalName>
          <classifier>unwanted</classifier>
        </configuration>
      </execution>
    </executions>

然后，我在maven-antrun-plugin中配置了单独的执行，以编译eache源文件夹并创建单独的jars。

剩下的就是配置maven部署插件，以便将两个jars (以及它们的源jars)正确地放置在maven存储库中，以便将它们作为依赖项获取。