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使用SpringBoot对mybatis进行整合需要注意哪些问题?相信很多没有经验的人对此束手无策,为此本文总结了问题出现的原因和解决方法,通过这篇文章希望你能解决这个问题。
1.NoSuchBeanDefinitionException
2.'..Service' that could not be found service找不到
3.port 80 was already in use 端口号被占用
4.TemplateInputException 模板解析异常或找不到模板
1.检查模板所在的目录是否与配置的前缀目录相同
2.检查返回的模板是否存在,返回值类型是否一致
3.检查配置前缀时是否以"/"斜杠结尾
4.控制层的url与客户端的ur是否一致
5. 404异常 访问资源不存在
6. 500异常 500异常要查看控制台
1.springboot中添加maven依赖
2.BadSqlGrammarException 错误的sql语句
3.BindingException 绑定异常
1.检查映射文件的路径配置与实际存储位置是否一致
2.检查dao接口的类名是否与映射文件的namespace值相同(不能有空格)
3.检查dao接口中的方法名是否在映射文件中有对应的id
4.IllegalArgumentException
原因:同样说我sql映射是否出现了重复性的定义(例如:分别以注解方式和xml配置文件方式进行定义,也就是说在同一个namespace下出现了重复的元素id)
5.SAXParseException xml解析问题
原因:扫描mapper包没有配置或配置不正确
解决:
方案一:
1. 启动类加@MapperScan("mapperPackagePath")
方案二:
增加配置类:
package com.yx.readingwebsite.config; import org.mybatis.spring.mapper.MapperScannerConfigurer; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; /** * MapperScannerConfigurer 配置DAO层 */ @Configuration public class MyBatisMapperScannerConfig { @Bean public MapperScannerConfigurer getMapperScannerConfigurer(){ MapperScannerConfigurer msc = new MapperScannerConfigurer(); msc.setSqlSessionFactoryBeanName("sqlSessionFactory"); msc.setBasePackage("com.yx.readingwebsite.mapper"); return msc; } }
原因:xml的mapper SQL 和 Mapper接口没有绑定
解决:
方案一:全局配置文件application.yml增加mybatis配置【xml mapper包在resource目录下】
mybatis: mapper-locations: classpath:mapper/*.xml
方案二:增加配置类
package com.yx.readingwebsite.config; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.SqlSessionTemplate; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.core.io.Resource; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import org.springframework.jdbc.datasource.DataSourceTransactionManager; import org.springframework.transaction.PlatformTransactionManager; import org.springframework.transaction.annotation.EnableTransactionManagement; import org.springframework.transaction.annotation.TransactionManagementConfigurer; import javax.sql.DataSource; /** * 配置MyBatis,引入数据源,sqlSessionFactory,sqlSessionTemplate,事务管理器 */ @Configuration //配置类 @EnableTransactionManagement //允许使用事务管理器 public class MyBatisModelConfig implements TransactionManagementConfigurer { @Autowired private DataSource dataSource; @Bean(name = "sqlSessionFactory") public SqlSessionFactory getSqlSessionFactory(){ SqlSessionFactoryBean ssfb = new SqlSessionFactoryBean(); ssfb.setDataSource(dataSource); //设置数据源 ssfb.setTypeAliasesPackage("com.yx.readingwebsite.model"); //设置扫描模型包【po】 try { Resource[] resources = new PathMatchingResourcePatternResolver() .getResources("classpath:mapper/*.xml"); ssfb.setMapperLocations(resources); return ssfb.getObject(); } catch (Exception e) { e.printStackTrace(); throw new RuntimeException(); } } @Bean //获得Session 模板,从而获得Session public SqlSessionTemplate getSqlSessionTemplate(SqlSessionFactory sqlSessionFactory){ return new SqlSessionTemplate(sqlSessionFactory); } @Override //事务管理器 public PlatformTransactionManager annotationDrivenTransactionManager() { return new DataSourceTransactionManager(dataSource); } }
需要注意的是,xml版的mybatis一定要在sqlSessionFactory中指定mapperLocations,即下图
总结:
两种配置方案。方案一,使用配置类;方案二,使用配置文件。完整配置如下:
方案一:配置类
package com.yx.readingwebsite.config; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.SqlSessionTemplate; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.core.io.Resource; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import org.springframework.jdbc.datasource.DataSourceTransactionManager; import org.springframework.transaction.PlatformTransactionManager; import org.springframework.transaction.annotation.EnableTransactionManagement; import org.springframework.transaction.annotation.TransactionManagementConfigurer; import javax.sql.DataSource; /** * 配置MyBatis,引入数据源,sqlSessionFactory,sqlSessionTemplate,事务管理器 */ @Configuration //配置类 @EnableTransactionManagement //允许使用事务管理器 public class MyBatisModelConfig implements TransactionManagementConfigurer { @Autowired private DataSource dataSource; @Bean(name = "sqlSessionFactory") public SqlSessionFactory getSqlSessionFactory(){ SqlSessionFactoryBean ssfb = new SqlSessionFactoryBean(); ssfb.setDataSource(dataSource); //设置数据源 ssfb.setTypeAliasesPackage("com.yx.readingwebsite.model"); //设置扫描模型包【po】 try { Resource[] resources = new PathMatchingResourcePatternResolver() .getResources("classpath:mapper/*.xml"); ssfb.setMapperLocations(resources); return ssfb.getObject(); } catch (Exception e) { e.printStackTrace(); throw new RuntimeException(); } } @Bean //获得Session 模板,从而获得Session public SqlSessionTemplate getSqlSessionTemplate(SqlSessionFactory sqlSessionFactory){ return new SqlSessionTemplate(sqlSessionFactory); } @Override //事务管理器 public PlatformTransactionManager annotationDrivenTransactionManager() { return new DataSourceTransactionManager(dataSource); } }
package com.yx.readingwebsite.config; import org.mybatis.spring.mapper.MapperScannerConfigurer; import org.springframework.boot.autoconfigure.AutoConfigureAfter; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; /** * MapperScannerConfigurer 配置DAO层 */ @Configuration @AutoConfigureAfter(MyBatisModelConfig.class) public class MyBatisMapperScannerConfig { @Bean public MapperScannerConfigurer getMapperScannerConfigurer(){ MapperScannerConfigurer msc = new MapperScannerConfigurer(); msc.setSqlSessionFactoryBeanName("sqlSessionFactory"); msc.setBasePackage("com.yx.readingwebsite.mapper"); return msc; } }
方案二:配置文件 application.yml
spring: datasource: url: jdbc:mysql://127.0.0.1:3306/readingWebsite?useUnicode=true&characterEncoding=utf-8 username: password: driver-class-name: com.mysql.jdbc.Driver max-active: 100 max-idle: 10 max-wait: 10000 default-auto-commit: false time-between-eviction-runs-millis: 30000 min-evictable-idle-time-millis: 30000 test-while-idle: true test-on-borrow: true test-on-return: true validation-query: SELECT 1 mybatis: mapper-locations: classpath:mapper/*.xml
package com.yx.readingwebsite; import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication @MapperScan("com.yx.readingwebsite") public class ReadingWebsiteApplication { public static void main(String[] args) { SpringApplication.run(ReadingWebsiteApplication.class, args); } }
看完上述内容,你们掌握使用SpringBoot对mybatis进行整合需要注意哪些问题的方法了吗?如果还想学到更多技能或想了解更多相关内容,欢迎关注亿速云行业资讯频道,感谢各位的阅读!
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