现在我想使用jdk 11编译我的项目，我已经将默认java设置为java 11：

~/.m2 ⌚ 15:27:30
$ java -version                                                                                                                                                                              ‹ruby-2.7.2›
openjdk version "11.0.10" 2021-01-19
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.10+9)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.10+9, mixed mode)
(base)

并在中添加配置 ~/.m2/settings.xml 文件：

<profile>    
  <id>jdk-11</id>    
  <activation>    
    <activeByDefault>true</activeByDefault>    
  <jdk>11</jdk>    
  </activation>    
  <properties>    
    <maven.compiler.source>11</maven.compiler.source>    
    <maven.compiler.target>11</maven.compiler.target>    
    <maven.compiler.compilerVersion>11</maven.compiler.compilerVersion>    
  </properties>    
</profile>

但当我使用此命令编译项目时：

/usr/local/Cellar/maven@3.5/3.5.4_1/bin/mvn install

显示错误：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project util: Compilation failure: Compilation failure:
[ERROR] /Users/dolphin/source/dj/source/backend/scom-java-common/util/src/main/java/scom/java/common/mulitshed/ShedTask.java:[5,14] illegal reference to restricted type 'var'
[ERROR] /Users/dolphin/source/dj/source/backend/scom-java-common/util/src/main/java/scom/java/common/mulitshed/RedisLocker.java:[5,14] illegal reference to restricted type 'var'
[ERROR] /Users/dolphin/source/dj/source/backend/scom-java-common/util/src/main/java/scom/java/common/controller/MysqlCheckControllerTester.java:[5,14] illegal reference to restricted type 'var'
[ERROR] /Users/dolphin/source/dj/source/backend/scom-java-common/util/src/main/java/scom/java/common/ntest/NTestService.java:[5,14] illegal reference to restricted type 'var'

我应该怎么做来解决这个问题？