<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-javadoc-plugin</artifactId>
				<version>2.9.1</version>
				<configuration>
					<aggregate>true</aggregate>
					<charset>UTF-8</charset>
					<encoding>UTF-8</encoding>
					<docencoding>UTF-8</docencoding>
				</configuration>
				<executions>
					<execution>
						<id>attach-javadocs</id>
						<goals>
							<goal>jar</goal>
						</goals>
					</execution>
				</executions>
			</plugin>
 

新增環境變數：

JAVA_TOOL_OPTIONS

-Dfile.encoding=UTF-8