实践丨SpringBoot整合Mybatis-Plus项目存在Mapper时报错
2024-06-07 21:27:53
本文分享自华为云社区《SpringBoot整合MybatisPlus项目存在Mapper时运行报错的问题分析与修复》，作者：攻城狮Chova 。
异常信息
- 在SpringBoot运行测试Mybatis-Plus测试的时候报错:
rg.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'com.oxford.test.ApplicationTests':
原因
- 自定义的mapper文件不受Spring管理所以不会注入到Spring容器中
- mybatis-config中只是会为对应的mapper创建代理类
- 想真正包装成bean, 注入到spring容器中,需要使用到AutoConfiguredMapperScannerRegistrar它会根据扫描 @Mapper注释或是 @MapperScan指定的包下的接口,将其注册为bean
- AutoConfiguredMapperScannerRegistrar:
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//package com.baomidou.mybatisplus.spring.boot.starter;import com.baomidou.mybatisplus.MybatisConfiguration;
import com.baomidou.mybatisplus.MybatisXMLLanguageDriver;
import com.baomidou.mybatisplus.spring.MybatisSqlSessionFactoryBean;
import java.util.Iterator;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.sql.DataSource;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.logging.Log;
import org.apache.ibatis.logging.LogFactory;
import org.apache.ibatis.mapping.DatabaseIdProvider;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.session.ExecutorType;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.mapper.ClassPathMapperScanner;
import org.mybatis.spring.mapper.MapperFactoryBean;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.ObjectProvider;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.boot.autoconfigure.AutoConfigurationPackages;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.ResourceLoaderAware;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;@Configuration
@ConditionalOnClass({SqlSessionFactory.class, MybatisSqlSessionFactoryBean.class})
@ConditionalOnBean({DataSource.class})
@EnableConfigurationProperties({MybatisPlusProperties.class})
@AutoConfigureAfter({DataSourceAutoConfiguration.class})
public class MybatisPlusAutoConfiguration {private static final Log logger = LogFactory.getLog(MybatisPlusAutoConfiguration.class);private final MybatisPlusProperties properties;private final Interceptor[] interceptors;private final ResourceLoader resourceLoader;private final DatabaseIdProvider databaseIdProvider;private final List<ConfigurationCustomizer> configurationCustomizers;public MybatisPlusAutoConfiguration(MybatisPlusProperties properties, ObjectProvider<Interceptor[]> interceptorsProvider, ResourceLoader resourceLoader, ObjectProvider<DatabaseIdProvider> databaseIdProvider, ObjectProvider<List<ConfigurationCustomizer>> configurationCustomizersProvider) {this.properties = properties;this.interceptors = (Interceptor[])interceptorsProvider.getIfAvailable();this.resourceLoader = resourceLoader;this.databaseIdProvider = (DatabaseIdProvider)databaseIdProvider.getIfAvailable();this.configurationCustomizers = (List)configurationCustomizersProvider.getIfAvailable();}@PostConstructpublic void checkConfigFileExists() {if (this.properties.isCheckConfigLocation() && StringUtils.hasText(this.properties.getConfigLocation())) {Resource resource = this.resourceLoader.getResource(this.properties.getConfigLocation());Assert.state(resource.exists(), "Cannot find config location: " + resource + " (please add config file or check your Mybatis configuration)");}}@Bean@ConditionalOnMissingBeanpublic SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception {MybatisSqlSessionFactoryBean factory = new MybatisSqlSessionFactoryBean();factory.setDataSource(dataSource);factory.setVfs(SpringBootVFS.class);if (StringUtils.hasText(this.properties.getConfigLocation())) {factory.setConfigLocation(this.resourceLoader.getResource(this.properties.getConfigLocation()));}MybatisConfiguration configuration = this.properties.getConfiguration();if (configuration == null && !StringUtils.hasText(this.properties.getConfigLocation())) {configuration = new MybatisConfiguration();}if (configuration != null && !CollectionUtils.isEmpty(this.configurationCustomizers)) {Iterator i$ = this.configurationCustomizers.iterator();while(i$.hasNext()) {ConfigurationCustomizer customizer = (ConfigurationCustomizer)i$.next();customizer.customize(configuration);}}configuration.setDefaultScriptingLanguage(MybatisXMLLanguageDriver.class);factory.setConfiguration(configuration);if (this.properties.getConfigurationProperties() != null) {factory.setConfigurationProperties(this.properties.getConfigurationProperties());}if (!ObjectUtils.isEmpty(this.interceptors)) {factory.setPlugins(this.interceptors);}if (this.databaseIdProvider != null) {factory.setDatabaseIdProvider(this.databaseIdProvider);}if (StringUtils.hasLength(this.properties.getTypeAliasesPackage())) {factory.setTypeAliasesPackage(this.properties.getTypeAliasesPackage());}if (StringUtils.hasLength(this.properties.getTypeEnumsPackage())) {factory.setTypeEnumsPackage(this.properties.getTypeEnumsPackage());}if (StringUtils.hasLength(this.properties.getTypeHandlersPackage())) {factory.setTypeHandlersPackage(this.properties.getTypeHandlersPackage());}if (!ObjectUtils.isEmpty(this.properties.resolveMapperLocations())) {factory.setMapperLocations(this.properties.resolveMapperLocations());}if (!ObjectUtils.isEmpty(this.properties.getGlobalConfig())) {factory.setGlobalConfig(this.properties.getGlobalConfig().convertGlobalConfiguration());}return factory.getObject();}@Bean@ConditionalOnMissingBeanpublic SqlSessionTemplate sqlSessionTemplate(SqlSessionFactory sqlSessionFactory) {ExecutorType executorType = this.properties.getExecutorType();return executorType != null ? new SqlSessionTemplate(sqlSessionFactory, executorType) : new SqlSessionTemplate(sqlSessionFactory);}@Configuration@Import({MybatisPlusAutoConfiguration.AutoConfiguredMapperScannerRegistrar.class})@ConditionalOnMissingBean({MapperFactoryBean.class})public static class MapperScannerRegistrarNotFoundConfiguration {public MapperScannerRegistrarNotFoundConfiguration() {}@PostConstructpublic void afterPropertiesSet() {MybatisPlusAutoConfiguration.logger.debug("No " + MapperFactoryBean.class.getName() + " found.");}}public static class AutoConfiguredMapperScannerRegistrar implements BeanFactoryAware, ImportBeanDefinitionRegistrar, ResourceLoaderAware {private BeanFactory beanFactory;private ResourceLoader resourceLoader;public AutoConfiguredMapperScannerRegistrar() {}public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {MybatisPlusAutoConfiguration.logger.debug("Searching for mappers annotated with @Mapper");ClassPathMapperScanner scanner = new ClassPathMapperScanner(registry);try {if (this.resourceLoader != null) {scanner.setResourceLoader(this.resourceLoader);}List<String> packages = AutoConfigurationPackages.get(this.beanFactory);if (MybatisPlusAutoConfiguration.logger.isDebugEnabled()) {Iterator i$ = packages.iterator();while(i$.hasNext()) {String pkg = (String)i$.next();MybatisPlusAutoConfiguration.logger.debug("Using auto-configuration base package '" + pkg + "'");}}scanner.setAnnotationClass(Mapper.class);scanner.registerFilters();scanner.doScan(StringUtils.toStringArray(packages));} catch (IllegalStateException var7) {MybatisPlusAutoConfiguration.logger.debug("Could not determine auto-configuration package, automatic mapper scanning disabled." + var7);}}public void setBeanFactory(BeanFactory beanFactory) throws BeansException {this.beanFactory = beanFactory;}public void setResourceLoader(ResourceLoader resourceLoader) {this.resourceLoader = resourceLoader;}}
}
解决办法
@Mapper
- 在mapper文件的类上添加 @Mapper注解
@MapperScan
- 在主类上添加 @MapperScan注解,指定mapper的扫描范围,注意值为mapper文件所在的包名
@MapperScan("com.oxford.mapper")点击关注，第一时间了解华为云新鲜技术~
实践丨SpringBoot整合Mybatis-Plus项目存在Mapper时报错相关推荐
- SpringBoot整合Mybatis(高级)
SpringBoot整合Mybatis(高级) 文章目录 SpringBoot整合Mybatis(高级) 前言 基础环境配置 增删改查 ResultMap 复杂查询 多对一 一对多 动态SQL if ...
- SpringBoot整合mybatis、shiro、redis实现基于数据库的细粒度动态权限管理系统实例（转）...
SpringBoot整合mybatis.shiro.redis实现基于数据库的细粒度动态权限管理系统实例 shiro 目录(?)[+] 前言 表结构 maven配置 配置Druid 配置mybatis ...
- SpringBoot整合Mybatis超详细流程
SpringBoot整合Mybatis超详细流程 文章目录 SpringBoot整合Mybatis超详细流程 前言 详细流程 0.引入Mybatis 1.创建数据 2.创建程序目录 3.理解后台访问流 ...
- （一）SpringBoot 整合 MyBatis
一.工具 IDE:idea.DB:mysql 二.创建SpringBoot工程 在Idea中使用SpringInitializr模板创建SpringBoot工程,依赖选择如下: 这里也可以不选JDBC ...
- springboot 整合mybatis实现curd
springboot 整合mybatis pom文件 mvc 架构 application.properties 扩展配置,druid配置类 项目地址: https://github.com/seve ...
- springboot整合mysql5.7_详解SpringBoot整合MyBatis详细教程
1. 导入依赖 首先新建一个springboot项目,勾选组件时勾选Spring Web.JDBC API.MySQL Driver 然后导入以下整合依赖 org.mybatis.spring.boo ...
- springboot整合mybatis 使用HikariCP连接池
springboot整合mybatis 使用HikariCP连接池 前言 Springboot让Java开发更加美好,本节主要讲的是使用Hikari数据库连接池,如果需要使用druid连接池的请看我另 ...
- SpringBoot整合MyBatis并实现简单的查询功能
学了SpringBoot整合MyBatis才知道什么叫做省事,想当初用SSM的时候,那配置是真的多,SpringBoot真的是太友好了,到底有多好,接下来演示一个对数据库的查询功能,然初学者的我们大开 ...
- springboot 整合mybatis plus
简单介绍下 mybatis plus,mybatis plus(简称 MP)是一个 mybatis 的增强工具,在 MyBatis 的基础上只做增强不做改变,为简化开发.提高效率而生. 本文讲解使用 ...
最新文章
- selenium3浏览器驱动安装设置方法
- css实现图片自适应容器的几种方式
- uvalive4744(数论)
- 商品评价 - 实现分页
- redis存储新闻列表_Redis对象——集合(Set)
- 手动创建线程池 效果会更好_创建更好的，可访问的焦点效果
- cacheinterceptor第二次访问没被调用_访问者设计模式在OSG中的应用
- 【新年礼物】阿里资深p8教你学习Web全栈架构师！
- Git的安装与使用教程
- python中‘/’和‘//’区别
- Linux下启动Oracle数据库
- ssm框架返回html,ssm框架controller层返回json格式数据到页面
- now is all
- 将字符'0'-'9'转换为数字（c语言）
- QT的Q3DScatter使用（三维可视图）
- 【笔记】运营如何追求极致--混沌大学（抖音分享）
- 3 万亿美元，苹果问鼎全球市值最高公司宝座
- 第 46 届 ICPC 国际大学生程序设计竞赛亚洲区域赛（沈阳）
- 以太坊 day (6) 简单众筹项目的演示
- 9.Java SE 集合