问题
2024-06-05 22:05:12,241 ERROR [http-nio-8888-exec-1][DirectJDKLog.java:175] - Servlet.service() for servlet [dispatcherServlet] in context with path [/content] threw exception [Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): org.chz.service.content.service.CourseBaseInfoService.queryCourseBaseList] with root cause
org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): org.chz.service.content.service.CourseBaseInfoService.queryCourseBaseListat org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:235)at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.<init>(MybatisMapperMethod.java:51)at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.lambda$cachedInvoker$0(MybatisMapperProxy.java:111)at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)at com.baomidou.mybatisplus.core.toolkit.CollectionUtils.computeIfAbsent(CollectionUtils.java:117)at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.cachedInvoker(MybatisMapperProxy.java:98)at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:89)
SpringBoot启动类默认扫描路径是:当前Application类所在的包及其子包。
在多模块工程中,Service接口在其他module中,不能被扫描到。
这是为了使:
@AutowiredCourseBaseInfoService courseBaseInfoService;
注入不报错,可能会使用
@ResourceCourseBaseInfoService courseBaseInfoService;
或者在启动类上添加@MapperScan
@SpringBootApplication(scanBasePackages = "org.chz")
@MapperScan("xxx.xxx")
public class ApiApplication {public static void main(String[] args) {SpringApplication.run(ApiApplication.class, args);}}
MapperScan
的作用:扫描指定的包,包里面的所有接口在编译之后都会生成相应的实现类。
也就是说,在controller使用service时,获取到了一个service的实现类的实例,而没有真正继承service接口,这时运行就会报错。
解决方法
@SpringBootApplictaion(scanBasePackages="com.example")
其中:Service 及 ServiceImpl均需在com.example包下
@ComponentScan="com.example"
也可以