记录一次项目将mybatis框架升级成mybatisplus时遇到的报错
首先会导致这个bug的常见问题如下:
1.是否mapper.java文件上使用了注解@Mapper 或者 在启动类上扫描了Mapper类 @MapperScan(“com.heima.model.mappers”) 【注意扫描的包名是否正确】
2.注意mapper.xml文件中的namespace是否正确指向到Mapper.java类的位置 【】
3.注意被调用的方法名在mapper.java中和mapper.xml中的id保持一致性
4.注意mapper.xml方法的parameterType尽量指定全路径的domain
5.注意Mapper.java在被调用的地方需要注入@Autowired
参考链接:https://blog.csdn.net/qq_39997939/article/details/122279782
很显然以上检查了一遍都没有解决我的问题
找了很久发现
整合mybatisplus框架时,SqlSessionFactory不要使用原生的,应该使用MybatisSqlSessionFactory,换成MybatisSqlSessionFactory,mybatis自带的crud方法就可以正常使用了
完整代码如下:
(如果是做框架升级,将原有的mybatis配置类改成MybatisSqlSessionFactory就够了)
package com.hxqc.esign.config;
import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;
import com.hxqc.esign.utils.StringUtils;
import org.apache.ibatis.io.VFS;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.boot.autoconfigure.SpringBootVFS;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.core.type.classreading.CachingMetadataReaderFactory;
import org.springframework.core.type.classreading.MetadataReader;
import org.springframework.core.type.classreading.MetadataReaderFactory;
import org.springframework.util.ClassUtils;
import javax.sql.DataSource;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
@Configuration
public class MyBatisConfig {
@Autowired
private Environment env;
static final String DEFAULT_RESOURCE_PATTERN = "**
@Bean
public PaginationInterceptor paginationInterceptor() {
PaginationInterceptor page = new PaginationInterceptor();
page.setDialectType("mysql");
return page;
}
@Bean
@Primary
public MybatisSqlSessionFactoryBean mybatisSqlSessionFactoryBean() {
MybatisSqlSessionFactoryBean mybatisPlus = new MybatisSqlSessionFactoryBean();
mybatisPlus.setDataSource(dataSource);
mybatisPlus.setVfs(SpringBootVFS.class);
if (StringUtils.hasText(this.properties.getConfigLocation())) mybatisPlus.setConfigLocation(this.resourceLoader.getResource(this.properties.getConfigLocation()));
if (!ObjectUtils.isEmpty(this.interceptors)) mybatisPlus.setPlugins(this.interceptors);
MybatisConfiguration mc = new MybatisConfiguration();
mc.setDefaultScriptingLanguage(MybatisXMLLanguageDriver.class);
// 数据库字段设计为驼峰命名,默认开启的驼峰转下划线会报错字段找不到
mc.setMapUnderscoreToCamelCase(true);
mybatisPlus.setConfiguration(mc);
if (this.databaseIdProvider != null) mybatisPlus.setDatabaseIdProvider(this.databaseIdProvider);
if (StringUtils.hasLength(this.properties.getTypeAliasesPackage()))
mybatisPlus.setTypeAliasesPackage(this.properties.getTypeAliasesPackage());
if (StringUtils.hasLength(this.properties.getTypeHandlersPackage()))
mybatisPlus.setTypeHandlersPackage(this.properties.getTypeHandlersPackage());
if (!ObjectUtils.isEmpty(this.properties.resolveMapperLocations()))
mybatisPlus.setMapperLocations(this.properties.resolveMapperLocations());
return mybatisPlus;
}
}



