整合报错Error creating bean with name 'sqlSessionFactory' defined in class path resource

### 若依框架中 `Error creating bean with name 'sqlSessionFactory'` 的解决方案 在若依框架中遇到 `Error creating bean with name 'sqlSessionFactory'` 错误时，通常是因为 MyBatis 配置文件或数据库连接配置存在问题。以下是可能的原因及其对应的解决方法： #### 1. 数据源配置错误 如果数据源未正确配置，则可能导致 `SqlSessionFactory` 创建失败。需检查 `application.yml` 或 `application.properties` 文件中的数据源配置是否正确。 ```yaml spring: datasource: url: jdbc:mysql://localhost:3306/your_database?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC username: root password: your_password driver-class-name: com.mysql.cj.jdbc.Driver ``` 确保 URL、用户名和密码均无误[^1]。 #### 2. Mapper XML 文件路径问题 当 MyBatis 找不到指定的 Mapper XML 文件时，也会引发此错误。需要确认以下几点： - Mapper 接口所在的包名是否已在 Spring Boot 中注册。 - Mapper XML 文件的位置是否与接口匹配。 在 `MyBatisConfig.java` 中添加如下代码以扫描 Mapper 路径： ```java @Configuration @MapperScan(basePackages = {"com.ruoyi.project.system.mapper"}) public class MyBatisConfig { } ``` 同时，在 `application.yml` 中设置 Mapper XML 文件位置： ```yaml mybatis: mapper-locations: classpath:mapper/*.xml ``` 确保 `classpath:mapper/` 下存在相应的 XML 文件[^3]。 #### 3. 映射文件语法错误 如果 Mapper XML 文件中有语法错误（如 SQL 语句不合法），则会阻止 `SqlSessionFactory` 正常初始化。可以通过日志查看具体的错误信息并修复。 例如，XML 文件中可能存在拼写错误或标签闭合不当的情况： ```xml <select id="selectUserById" parameterType="int" resultType="User"> SELECT * FROM user WHERE id = #{id}; </select> ``` 验证所有 SQL 语句是否符合 MySQL 语法标准[^4]。 #### 4. 输出布局问题 在 IDEA 开发环境中，输出目录结构异常也可能导致该问题。按照以下步骤排查： 1. 打开 **File -> Project Structure**； 2. 进入 **Artifacts** 页面，检查是否存在波浪线标记； 3. 删除原有的 `war_exploded` 并重新创建 Web Application: Exploded 和 From Modules； 4. 确认波浪线消失后重启 Tomcat[^5]。 #### 5. Jar 包冲突 某些情况下，依赖项版本不兼容可能会引起此类错误。建议清理 Maven 缓存并强制更新依赖： ```bash mvn clean install -U ``` 或者手动调整 `pom.xml` 中的相关依赖版本： ```xml <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.3.0</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> <version>8.0.29</version> </dependency> ``` 确保使用的 MyBatis 版本与 Spring Boot 版本相适配[^2]。 --- ### 示例代码：自定义 MyBatis 配置类 ```java import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import javax.sql.DataSource; @Configuration public class CustomMyBatisConfig { @Bean public SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception { SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean(); factoryBean.setDataSource(dataSource); return factoryBean.getObject(); } } ``` ---

This error message suggests that there is an issue with the configuration of your SQL session factory. There could be several reasons for this error, including: 1. Incorrect configuration: Check that the configuration for your SQL session factory is correct. You may have missed a required property or made a typo in the configuration file. 2. Missing dependencies: Ensure that all the required dependencies for your SQL session factory are present in your classpath. You may be missing a required JAR file or library. 3. Conflicting dependencies: Check that there are no conflicting dependencies in your classpath. This can occur if you have multiple versions of the same library or JAR file. 4. Incorrect database driver: Ensure that you have specified the correct database driver in your configuration file. If the driver is not compatible with your database, this error can occur. To resolve this error, review your SQL session factory configuration and ensure that all required dependencies are present in your classpath. You may also need to update your database driver or resolve any conflicting dependencies.