解决Maven项目下使用Mybatis时，找不到mapper映射文件（不拷贝）问题

拼搏现实的明天。 2022-05-22 13:15 182阅读 0赞

# 问题 #

![这里写图片描述][70]  
控制台输出错误信息：

六月 25, 2018 2:23:26 下午 org.apache.catalina.core.StandardWrapperValve invoke
    严重: Servlet.service() for servlet [taotao-manager] in context with path [] threw exception [Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.taotao.mapper.TbItemMapper.selectByExample] with root cause
    org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.taotao.mapper.TbItemMapper.selectByExample
    	at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:189)
    	at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:43)
    	at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:58)
    	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:51)
    	at com.sun.proxy.$Proxy31.selectByExample(Unknown Source)
    	at com.taotao.service.impl.ItemServiceImpl.getItemById(ItemServiceImpl.java:31)
    	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)
    	..

# 原因 #

从这里看出，mapper接口与mapper映射文件放在同一包下  
![这里写图片描述][70 1]  
但是编译后，classes下只有.class文件，而没有mapper映射文件，导致调用mapper接口时找不到映射文件  
![这里写图片描述][70 2]

# 方法 #

修改`pom.xml`文件

<build>
    	<plugins>
    		
    		<plugin>
    			<groupId>org.apache.maven.plugins</groupId>
    			<artifactId>maven-resources-plugin</artifactId>
    			<version>2.7</version>
    			<configuration>
    				<encoding>UTF-8</encoding>
    			</configuration>
    		</plugin>
    	</plugins>
    	<resources>
             <resource>
                 <directory>src/main/java</directory>
                 <includes>
                     <include>**/*.properties</include>
                     <include>**/*.xml</include>
                 </includes>
                 <filtering>false</filtering>
             </resource>
         </resources>
    </build>

# 结果 #

![这里写图片描述][70 3]  
![这里写图片描述][70 4]

[70]: /images/20220522/3c58ec55ee41465cb91fec06010d3710.png
[70 1]: /images/20220522/ee395a023b8b4856a35f26025015f216.png
[70 2]: /images/20220522/0866b8e8cc2b496caaf169a6f46782e8.png
[70 3]: /images/20220522/aab238d58983426c9ebae5fdc1b88da8.png
[70 4]: /images/20220522/0cd2abbd48c54b048c65e5df2f996562.png