[maven] switch JDK version

[Alice52]

1. delete java.exe, javaw.exe, javaws.exe in follow directory

   • JDK11: default no jre, need run follow command ro generate jre

     bin\jlink.exe --module-path jmods --add-modules java.desktop --output jre

   • JDK10: C:\Program Files (x86)\Common Files\Oracle\Java\javapath

   • JDK8: C:\Windows\System32

2. switch in pom.xml

   <!-- method1 -->
   <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
       <maven.compiler.source>11</maven.compiler.source>
       <maven.compiler.target>11</maven.compiler.target>
   </properties>
   <!-- method1 -->
   <build>
       <plugins>
           <plugin>
               <groupId>org.apache.maven.plugins</groupId>
               <artifactId>maven-compiler-plugin</artifactId>
               <version>3.8.1</version>
               <configuration>
                   <source>10</source>
                   <target>10</target>
                   <encoding>UTF-8</encoding>
               </configuration>
           </plugin>
       </plugins>
   </build>

3. use JDK 10 as project SDK in IDEA

4. choose 10 as project language level in IDEA

5. choose compile SDK in IDEA

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reference

1. https://blog.csdn.net/fangside/article/details/100024467
2. https://blog.csdn.net/qq_34216875/article/details/78861768