今日排错

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.hmall.item.mapper.ItemMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1801) ~[spring-beans-5.3.27.jar:5.3.27]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1357) ~[spring-beans-5.3.27.jar:5.3.27]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311) ~[spring-beans-5.3.27.jar:5.3.27]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:657) ~[spring-beans-5.3.27.jar:5.3.27]
	... 34 common frames omitted

此报错的原因：

ItemMapper 的包路径没有被 Spring 扫描到

@SpringBootApplication
@MapperScan("com.hmall.item.mapper")  //这里加上扫描器即可
public class ItemServiceApplication {
    public static void main(String[] args) {
        SpringApplication.run(ItemServiceApplication.class, args);
    }
}

启动类类名上方加上扫描器即可。

---

Caused by: java.nio.charset.MalformedInputException: Input length = 1
	at java.base/java.nio.charset.CoderResult.throwException(CoderResult.java:274)
	at java.base/sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:339)
	at java.base/sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
	at java.base/java.io.InputStreamReader.read(InputStreamReader.java:181)
	at org.yaml.snakeyaml.reader.UnicodeReader.read(UnicodeReader.java:125)
	at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:183)
	... 43 common frames omitted

这段报错的原因：字符集编码没有设置好

设置好之后（要clean一下才能运行，不然还是会报错）