今天完成的事情：

了解springRMI运行过程

完成切换Server

继续解决之前的报错

明天计划的事情：

上传服务器运行

遇到的问题：

一堆小问题：

1.错误: 找不到或无法加载主类 com.kbk.domain.ServerDo

2.IDEA创建  iml文件，

3.maven项目打包时生成dependency-reduced-pom.xml

4.找不到maven-compiler-plugin 依赖，加上版本号就可以了  <version>3.8.1</version>

.......

收获：

2.原有的JAVARMI需要抛出很多RemoteException异常，这些都可以通过spring配置文件解决

private Logger logger= LoggerFactory.getLogger(RMIServiceChoice.class);
UserService userService=null;

public UserService getService(){

    //int count=new Random().nextInt(2);
    int count = 0;
    if(count == 0){
        try{
            logger.info("尝试获取serverA的服务");
            userService=getServiceA();
            logger.info("已经获取serverA的服务");

        }catch (Exception e){
            logger.error("服务A挂掉了,报错信息" + e.getMessage());
            e.printStackTrace();
            try {
                logger.info("serverA的服务获取失败,获取serviceB的服务");
                logger.info("尝试获取serverB的服务");
                userService=getServiceB();
                logger.info("已经获取serverB的服务");
            }catch (Exception e1){
                logger.error("服务全部挂掉了,报错信息" + e1.getMessage());
                e1.printStackTrace();
            }
        }
    }else if(count == 1){
        try{
            logger.info("尝试获取serverB的服务");
            userService=getServiceB();
            logger.info("已经获取serverB的服务");
        }catch (Exception e){
            logger.error("服务B挂掉了,报错信息" + e.getMessage());
            e.printStackTrace();
            try {
                logger.info("serverB的服务获取失败,获取serviceA的服务");
                logger.info("尝试获取serverA的服务");
                userService=getServiceA();
                logger.info("已经获取serverA的服务");
            }catch (Exception e1){
                logger.error("服务全部挂掉了,报错信息" + e1.getMessage());
                e1.printStackTrace();
            }
        }
    }
    return userService;
}
private UserService getServiceA(){
    ApplicationContext applicationContext=new ClassPathXmlApplicationContext("spring/spring-mybatis.xml");
    return (UserService) applicationContext.getBean("UserServiceA");
}
private UserService getServiceB(){
    ApplicationContext applicationContext=new ClassPathXmlApplicationContext("spring/spring-mybatis.xml");
    return (UserService) applicationContext.getBean("UserServiceB");
}

注释这个发现，Service根本没启动服务，启动服务发生报错

：org.springframework.beans.factory.BeanCreationException异常的解决办法

然后单独启动ServerDo,发生报错：

2021-04-19 11:10:15 CST ERROR com.kbk.domain.ServerDo31main - 报错信息Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through field 'userMapper'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [D:\JAVASourceCode\SpringRMI-Task8\ServiceA\target\classes\com\kbk\dao\UserMapper.class]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring/spring-mybatis.xml]: Initialization of bean failed; nested exception is java.lang.NoSuchMethodError: org.springframework.aop.framework.AopProxyUtils.getSingletonTarget(Ljava/lang/Object;)Ljava/lang/Object;

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through field 'userMapper'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [D:\JAVASourceCode\SpringRMI-Task8\ServiceA\target\classes\com\kbk\dao\UserMapper.class]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [spring/spring-mybatis.xml]: Initialization of bean failed; nested exception is java.lang.NoSuchMethodError: org.springframework.aop.framework.AopProxyUtils.getSingletonTarget(Ljava/lang/Object;)Ljava/lang/Object;

at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:643)