Spring Boot MyBatis BindingException: Invalid bound statement (not found)

错误信息

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.example.mapper.TestMapper.insert
        at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:229)
        at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:53)
        at org.apache.ibatis.binding.MapperProxy.lambda$cachedInvoker$0(MapperProxy.java:96)
        at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
        at org.apache.ibatis.util.MapUtil.computeIfAbsent(MapUtil.java:36)
        at org.apache.ibatis.binding.MapperProxy.cachedInvoker(MapperProxy.java:94)
        at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:86)
        at jdk.proxy2/jdk.proxy2.$Proxy89.insert(Unknown Source)

错误原因

没有配置mapper位置。

解决方法

方法一

启动类中指定要扫描的Mapper接口的包路径。

import org.mybatis.spring.annotation.MapperScan;

@SpringBootApplication
@MapperScan({"com.example.mapper1", "com.example.mapper2"})
public class TestApplication {

    public static void main(String[] args) {
        SpringApplication.run(TestApplication.class, args);
    }

}

方法二

配置文件中指定xml的位置。

mybatis:
  mapper-locations: classpath:mapper/*.xml