mybatis 配置

最新推荐文章于 2025-03-26 15:10:30 发布

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最新推荐文章于 2025-03-26 15:10:30 发布

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分类专栏： java 文章标签： mysql java

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mybatis 配置 mapper 路径
错误一：启动时找不到注入的 dao 类


The injection point has the following annotations:
	- @org.springframework.beans.factory.annotation.Autowired(required=true) 
Action:

原因：需要增加 MapperScan 配置

@MapperScan("com.xx.xx.dao")

其实项目中原先没有这个配置，但是以前的不知道为什么自动就扫描到了，查了半天也没查明白默认值是扫描哪里

错误二：调用 dao 的方法时找不到对应的 sql

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.fangzhou.timesmilk.dao.BaseOrderDao.getLastPlan

	at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:235)
	at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:53)
	at org.apache.ibatis.binding.MapperProxy.lambda$cachedInvoker$0(MapperProxy.java:115)
	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)
	at org.apache.ibatis.binding.MapperProxy.cachedInvoker(MapperProxy.java:102)
	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:85)
	at com.sun.proxy.$Proxy169.getLastPlan(Unknown Source)
	at com.fangzhou.timesmilk.portal.NoticeTest.testBase(NoticeTest.java:81)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
	at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
	at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
	at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)

原因，mybatis 中，mapper 对应的默认 xml 配置文件会在同一路径下查找，（一个放在 java，一个放在 resouce 下也是一样的），这里的统一路径时值打包后放在了同个包下，如果mapper 跟 xml 不是同一路径，就需要配置
mapper-locations

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