                        课程
                    
                        /后端开发
                        
                            /Java
                        
                        /Java9之模块系统

debug运行程序时出现如下错误，求解？

1、输入命令

student add 1001 张三一班

2、产生如下错误

java.lang.IllegalAccessException: class sms.runtime.CommandRunner (in module sms.runtime) cannot access class sms.service.impl.StudentServiceImpl (in module sms.service) because module sms.service does not export sms.service.impl to module sms.runtime

at java.base/jdk.internal.reflect.Reflection.newIllegalAccessException(Reflection.java:360)

at java.base/java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:589)

at java.base/java.lang.reflect.Method.invoke(Method.java:556)

at sms.runtime/sms.runtime.CommandRunner.run(CommandRunner.java:40)

at sms.runtime/sms.runtime.Main.main(Main.java:18)

3、service模块声明文件如下

module sms.service {
    requires sms.model;
    requires sms.persistence;
    uses sms.persistence.PersistenceService;
    provides sms.service.StudentService with sms.service.impl.StudentServiceImpl;
    exports sms.service;
}