使用SpringBoot整合Mybatis时遇到的坑

冷不防 2021-09-22 21:58 375阅读 0赞

<p>今天使用SpringBoot整合Mybatis时遇到一个错误。</p>

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      <code>***************************</code> 
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      <code>APPLICATION FAILED TO START</code> 
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      <code>***************************</code> 
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       &nbsp; 
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      <code>Description:</code> 
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       &nbsp; 
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      <code>Field userMapper in com.wzw.blog.service.impl.UserServiceImpl required a bean of type </code> 
      <code>'com.wzw.blog.mapper.UserMapper'</code> 
      <code>that could not be found.</code> 
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       &nbsp; 
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      <code>Action:</code> 
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       &nbsp; 
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      <code>Consider defining a bean of type </code> 
      <code>'com.wzw.blog.mapper.UserMapper'</code> 
      <code>in your configuration.</code> 
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解决方案：  
一：使用@Mapper

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      <code>@Mapper</code> 
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      <code>public</code> 
      <code>interface</code> 
      <code>UserMapper { </code> 
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       &nbsp; 
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      <code>&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code>public</code> 
      <code>User getUserById(Integer uId);</code> 
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      <code>}</code> 
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二、使用@MapperScan(value=”“)

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      <code>@SpringBootApplication</code> 
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      <code>@MapperScan</code> 
      <code>(value=</code> 
      <code>"com.wzw.blog.mapper"</code> 
      <code>)</code> 
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      <code>public</code> 
      <code>class</code> 
      <code>Application { </code> 
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       &nbsp; 
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      <code>&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code>public</code> 
      <code>static</code> 
      <code>void</code> 
      <code>main(String[] args) { </code> 
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      <code>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code>SpringApplication.run(Application.</code> 
      <code>class</code> 
      <code>, args);</code> 
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      <code>&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code>}</code> 
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      <code>}</code> 
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