Mybatis使用常见的错误（持续更新）

青旅半醒 2023-07-17 02:39 12阅读 0赞

1.  A query was run and no Result Maps were found for the Mapped Statement  
    ![在这里插入图片描述][20200318232041808.png]  
    问题的原因是：  
    框架不知道查询完成之后要封装到哪里，所以没有一个返回类型：  
    这里是在select标签中缺少了resultType类型  
    **解决方式如下，添加封装的位置**  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2d3el82OTAz_size_16_color_FFFFFF_t_70]
2.  这个问题是在连接数据库时出现的

> Establishing SSL connection without server’s identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn’t set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to ‘false’. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2d3el82OTAz_size_16_color_FFFFFF_t_70 1]  
**解决方式**  
只需要在配置数据库链接的时候加上对SSL的配置即可  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2d3el82OTAz_size_16_color_FFFFFF_t_70 2]  
**加粗部分为需要添加的内容**

> property name=“url” value="jdbc:mysql://localhost:3306/mybaits?**characterEncoding=utf8&useSSL=false**

[20200318232041808.png]: /images/20230528/68c794431c594900998e8d80119be5f1.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2d3el82OTAz_size_16_color_FFFFFF_t_70]: /images/20230528/342d65e3f97948b88ec357c0acf23053.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2d3el82OTAz_size_16_color_FFFFFF_t_70 1]: /images/20230528/0ca77f5ca6344ed6aa2b1c8840b32026.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2d3el82OTAz_size_16_color_FFFFFF_t_70 2]: /images/20230528/97fd5fdab3ce483e9fa104d13c0c53ba.png