错误的日志信息为：
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:3.6.3:jar (attach-javadocs) on project core-java-strings: MavenReportException: Error while generating Javadoc:
[ERROR] Exit code: 1
[ERROR] C:\WorkDir\Repository\iSharkfly-Docs\java-tutorials\core-java-modules\core-java-strings\src\main\java\com\baeldung\multiline\MultiLineString.java:68: error: text blocks are not supported in -source 11
[ERROR] return """
[ERROR] ^
[ERROR] (use -source 15 or higher to enable text blocks)
[ERROR] 1 error
[ERROR] Command line was: cmd.exe /X /C "C:\Progra~1\Semeru\jdk-17.0.6.10-openj9\bin\javadoc.exe @options @packages"
[ERROR]
[ERROR] Refer to the generated Javadoc files in 'C:\WorkDir\Repository\iSharkfly-Docs\java-tutorials\core-java-modules\core-java-strings\target\apidocs' dir.
[ERROR]
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <args> -rf :core-java-strings
问题和原因
出现上面错误信息的原因是在Java 代码编译的时候我们使用了一些在 JDK-17 中才有的属性。
但是生成的 Doc 文档却是使用的是 JDK 11。
我们需要做的就是在 maven-javadoc-plugin 插件中指定 JDK 的版本。
对插件添加下面的内容：
<configuration>
<release>${java.version}</release>
<encoding>UTF-8</encoding>
</configuration>
因为我们上面使用了全局配置变量，所以这里用的是变量类型，你也可以在这里直接使用数字 17。
配置参数：
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>${maven-javadoc-plugin.version}</version>
<configuration>
<release>${java.version}</release>
<encoding>UTF-8</encoding>
</configuration>
<executions>
<execution>
<id>attach-javadocs</id>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
把上图中的配置参数添加到 POM 文件中。