java - 无法使用高于 1.8 的 Java 的 maven-compiler-plugin 进行编译

Question

我有一个基于 NetBeans maven 的项目，我想从 Java 1.8 切换到 12，但我无法编译它。

经过多次尝试，我决定从头开始，创建一个非常简单的项目来了解如何进行此更改。

好吧，我试过了，我也无法编译简单的项目。

谁能解释一下我做错了什么？

序言

NetBeans:10.0

JAVA_HOME: C:\Program Files\Java\jdk-12(我也试过9、10、11)

专家:

项目创建

1. 创建带有窗口的项目(第一个 TopComponent)

1. 我将 JDK 版本从 11(NetBeans 10.0 中的默认值)更改为 12

1. 这是自动生成的 POM 和 javax.annotation-api 依赖项

   <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>
   <parent>
       <groupId>it.prj</groupId>
       <artifactId>Project-parent</artifactId>
       <version>2.9</version>
   </parent>
   <artifactId>Project-source</artifactId>
   <packaging>nbm</packaging>
   <build>
       <plugins>
           <plugin>
               <groupId>org.codehaus.mojo</groupId>
               <artifactId>nbm-maven-plugin</artifactId>
               <extensions>true</extensions>
               <configuration>
                   <useOSGiDependencies>true</useOSGiDependencies>
               </configuration>
           </plugin>
           <plugin>
               <groupId>org.apache.maven.plugins</groupId>
               <artifactId>maven-jar-plugin</artifactId>
               <configuration>
                   <useDefaultManifestFile>true</useDefaultManifestFile>
               </configuration>
           </plugin>
       </plugins>
   </build>
   <dependencies>
       <dependency>
           <groupId>org.netbeans.api</groupId>
           <artifactId>org-netbeans-api-annotations-common</artifactId>
           <version>${netbeans.version}</version>
       </dependency>
       <dependency>
           <groupId>org.netbeans.api</groupId>
           <artifactId>org-openide-windows</artifactId>
           <version>${netbeans.version}</version>
       </dependency>
       <dependency>
           <groupId>org.netbeans.api</groupId>
           <artifactId>org-openide-util</artifactId>
           <version>${netbeans.version}</version>
       </dependency>
       <dependency>
           <groupId>org.netbeans.api</groupId>
           <artifactId>org-openide-util-ui</artifactId>
           <version>${netbeans.version}</version>
       </dependency>
       <dependency>
           <groupId>org.netbeans.api</groupId>
           <artifactId>org-openide-util-lookup</artifactId>
           <version>${netbeans.version}</version>
       </dependency>
       <dependency>
           <groupId>org.netbeans.api</groupId>
           <artifactId>org-openide-awt</artifactId>
           <version>${netbeans.version}</version>
       </dependency>
       <dependency>
           <groupId>org.netbeans.api</groupId>
           <artifactId>org-netbeans-modules-settings</artifactId>
           <version>${netbeans.version}</version>
       </dependency>
       <dependency>
           <groupId>javax.annotation</groupId>
           <artifactId>javax.annotation-api</artifactId>
           <version>1.3.2</version>
           <type>jar</type>
       </dependency>
   </dependencies>
   <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
   

2. 然后我开始 Clean & Build > SUCCESS

3. 我把 Java 版本从 1.7 改成了 12

这将相关的插件添加到 POM

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.3.2</version>
            <configuration>
                <source>12</source>
                <target>12</target>
            </configuration>
        </plugin>

1. 更新版本字段，使其变为:

      <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-compiler-plugin</artifactId>
           <version>3.8.0</version>
           <configuration>
               <source>12</source>
               <target>12</target>
           </configuration>
       </plugin>
   

2. 然后我重新启动 Clean & Build > 失败

   cd D:\Project\Project-source; "JAVA_HOME=C:\\Program Files\\Java\\jdk-12" "M2_HOME=C:\\Program Files\\apache-maven-3.6.0" cmd /c "\"\"C:\\Program Files\\apache-maven-3.6.0\\bin\\mvn.cmd\" -Dmaven.ext.class.path=\"C:\\Program Files\\Netbeans 10.0\\java\\maven-nblib\\netbeans-eventspy.jar\" -Dfile.encoding=UTF-8 clean install\""
   

   构建项目源代码 2.9

   --- maven-clean-plugin:2.5:clean (default-clean) @项目源---

删除 D:\Project\Project-source\target

--- maven-resources-plugin:3.1.0:resources (default-resources) @ Project-source ---

Using 'UTF-8' encoding to copy filtered resources.
Copying 1 resource

--- maven-compiler-plugin:3.8.0:compile (default-compile) @ Project-source ---
Changes detected - recompiling the module!
Compiling 1 source file to D:\Project\Project-source\target\classes

--- nbm-maven-plugin:4.1:manifest (default-manifest) @ Project-source ---
NBM Plugin generates manifest
Adding OSGi bundle dependency - javax.annotation:javax.annotation-api
------------------------------------------------------------------------
BUILD FAILURE
------------------------------------------------------------------------
Failed to execute goal org.codehaus.mojo:nbm-maven-plugin:4.1:manifest (default-manifest) on project Project-source: 
Execution default-manifest of goal org.codehaus.mojo:nbm-maven-plugin:4.1:manifest failed.: IllegalArgumentException 

编辑

1. 我已尝试按照建议删除 nbm-maven-plugin 但这会改变项目的结构，我不知道如何重新包含此模块

Answer 1

请像这样使用4.2版本:

<groupId>org.apache.netbeans.utilities</groupId>
<artifactId>nbm-maven-plugin</artifactId>
<version>4.2</version>

替换对以下内容的任何引用:

 <groupId>org.codehaus.mojo</groupId>
 <artifactId>nbm-maven-plugin</artifactId>

jdk生成的jar文件>8老版本插件无法解析