[深圳|内门弟子]JAVA-况博凯|2021年04月19日的日报-技能树.IT修真院

发表于： 2021-04-19 23:22:24

2 1264

今天完成的事情：

解决Service启动报错

明天计划的事情：

上传代码到服务器运行

深度思考

遇到的问题：

一直找不到userService的bean，下面是报错信息

报错：

2021-04-19 22:06:00 CST WARN org.springframework.context.support.AbstractApplicationContext558refresh - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'com.kbk.service.UserService' available: expected single matching bean but found 2: UserServiceA,UserServiceB

2021-04-19 22:06:00 CST ERROR org.springframework.web.context.ContextLoader313initWebApplicationContext - Context initialization failed org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'com.kbk.service.UserService' available: expected single matching bean but found 2: UserServiceA,UserServiceB

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Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.handler.MappedInterceptor#1': Cannot create inner bean 'com.kbk.util.InterceptUtil#0' of type [com.kbk.util.InterceptUtil] while setting constructor argument; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'com.kbk.util.InterceptUtil#0': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'com.kbk.service.UserService' available: expected single matching bean but found 2: UserServiceA,UserServiceB

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1 原因分析:

bean不能创建不能自动装载一定出在配置问题上

2 解决步骤

a 检查 dao层（@param可不写） service层（@Server） controller层（@Controller）有没有加注解如果没有加上一般就Ok了如果加了请看b步骤

b 检查添加了注解dao层service层controller层对应的包有没有添加进针对这些注解的包扫描中如果没有加上就Ok(在spring的配置文件中检查)

(a)打开spring-context.xml配置文件

(b)找到class为org.mybatis.spring.mapper.MapperScannerConfigurer的bean

(c)在name为basePackage的property

(d)在对应的value下添加你的包就行了

如果上述这些步骤还没有解决的话，可以在spring-context.xml配置文件中加入如下语句：

这些都是对的，还是无法找到userService，怀疑是和拆分出去的ServiceA和ServiceB发生了冲突，最后不使用Bean导入，直接： UserService userService = null;

收获：

导入AOP依赖解决：

<groupId>org.springframework</groupId>

<artifactId>spring-aspects</artifactId>

<version>${aspectj.version}</version>

</dependency>

<groupId>aopalliance</groupId>

<artifactId>aopalliance</artifactId>

<version>${aopalliance.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-aop</artifactId>

<version>${org.springframework.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-tx</artifactId>

<version>${org.springframework.version}</version>

</dependency>

出现新的报错：

2021-04-19 13:45:04 CST ERROR com.kbk.domain.ServerDo31main - 报错信息Error creating bean with name 'org.springframework.remoting.rmi.RmiServiceExporter#0' defined in class path resource [spring/spring-mybatis.xml]: Error setting property values; nested exception is org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:

PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'serviceInterface' threw exception; nested exception is java.lang.IllegalArgumentException: 'serviceInterface' must be an interface

这里不应该写实现类，需要写接口