mybatis plus mapper（mybatis-plus 返回map）

目录

• mybatis-plus通用mapper调用报错
• 解决方法

mybatis-plus通用mapper调用报错

使用springboot整合mybatis-plus后，调用自定义的方法正常，调用BaseMapper中自带的方法报错如下：

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org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): cn.rkang.enterprise.mapper.EmployeeInfoMapper.selectOne at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:227) ~[mybatis-3.4.6.jar:3.4.6] at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:49) ~[mybatis-3.4.6.jar:3.4.6] at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:65) ~[mybatis-3.4.6.jar:3.4.6] at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:58) ~[mybatis-3.4.6.jar:3.4.6] at com.sun.proxy.$Proxy70.selectOne(Unknown Source) ~[na:na] at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl.getOne(ServiceImpl.java:259) ~[mybatis-plus-extension-3.1.1.jar:3.1.1] at com.baomidou.mybatisplus.extension.service.IService.getOne(IService.java:192) ~[mybatis-plus-extension-3.1.1.jar:3.1.1] at com.baomidou.mybatisplus.extension.service.IService FastClassBySpringCGLIB FastClassBySpringCGLIB f8525d18.invoke(<generated>) ~[mybatis-plus-extension-3.1.1.jar:3.1.1] at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.1.6.RELEASE.jar:5.1.6.RELEASE] at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:684) ~[spring-aop-5.1.6.RELEASE.jar:5.1.6.RELEASE] at cn.rkang.enterprise.local.service.EmployeeInfoService EnhancerBySpringCGLIB EnhancerBySpringCGLIB 7e12f21b.getOne(<generated>) ~[classes/:na]

跟进源码发现是methodProxy.invoke(target, argsToUse)报错

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if (chain.isEmpty() && Modifier.isPublic(method.getModifiers())) { Object[] argsToUse = AopProxyUtils.adaptArgumentsIfNecessary(method, args); retVal = methodProxy.invoke(target, argsToUse); } else { retVal = (new CglibAopProxy.CglibMethodInvocation(proxy, target, method, args, targetClass, chain, methodProxy)).proceed(); }

在invoke方法组装sqlmand的时候，MappedStatement没有组装成功，始终是null

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public SqlCommand(Configuration configuration, Class<?> mapperInterface, Method method) { String methodName = method.getName(); Class<?> declaringClass = method.getDeclaringClass(); MappedStatement ms = this.resolveMappedStatement(mapperInterface, methodName, declaringClass, configuration); if (ms == null) { if (method.getAnnotation(Flush.class) == null) { throw new BindingException("Invalid bound statement (not found): " + mapperInterface.getName() + "." + methodName); } this.name = null; this.type = SqlCommandType.FLUSH; } else { this.name = ms.getId(); this.type = ms.getSqlCommandType(); if (this.type == SqlCommandType.UNKNOWN) { throw new BindingException("Unknown execution method for: " + this.name); } } }

解决方法

将mybatis的sqlSessionFactory替换成mybatis-plusd的MybatisSqlSessionFactoryBean，添加配置类MybatisPlusConfig

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package cn.rkang.enterprise.common.config; import com.baomidou.mybatisplus.core.MybatisConfiguration; import com.baomidou.mybatisplus.core.MybatisXMLLanguageDriver; import com.baomidou.mybatisplus.core.toolkit.ObjectUtils; import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor; import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean; import org.apache.ibatis.mapping.DatabaseIdProvider; import org.apache.ibatis.plugin.Interceptor; import org.mybatis.spring.boot.autoconfigure.MybatisProperties; 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.io.DefaultResourceLoader; import org.springframework.core.io.ResourceLoader; import org.springframework.util.StringUtils; import javax.sql.DataSource; @Configuration public class MybatisPlusConfig { @Autowired private DataSource dataSource; @Autowired private MybatisProperties properties; @Autowired private ResourceLoader resourceLoader = new DefaultResourceLoader(); @Autowired(required = false) private Interceptor[] interceptors; @Autowired(required = false) private DatabaseIdProvider databaseIdProvider; /** * mybatis-plus分页插件 */ @Bean public PaginationInterceptor paginationInterceptor() { PaginationInterceptor page = new PaginationInterceptor(); page.setDialectType("mysql"); return page; } /** * 这里全部使用mybatis-autoconfigure 已经自动加载的资源。不手动指定 * 配置文件和mybatis-boot的配置文件同步 * @return */ @Bean 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(false); 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; } }

问题解决！

以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。

原文链接：https://blog.csdn.net/noob9527/article/details/90229837