Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value

mybatis-generator的反向生成xml生成bean出错：原因是generator生成时，重复生成了，内容，去生成的xml文件中查询id是否重复，对其删除即可，另附上永久解决办法，生成时不会产生重复：<table tableName="Behospital" catalog="hospital"><property name="useActualColumnNames"

剑laii

2128人浏览 · 2022-01-03 16:28:46

剑laii · 2022-01-03 16:28:46 发布

mybatis-generator的反向生成xml生成bean出错：原因是generator生成时，重复生成了，内容，去生成的xml文件中查询id是否重复，对其删除即可，另附上永久解决办法，生成时不会产生重复：

	<table tableName="Behospital" catalog="hospital">
            <property name="useActualColumnNames" value="true"/>
            <property name="ignoreQualifiersAtRuntime" value="true"/>
    </table>

在这里插入图片描述

catalog填上数据库名，后面加上一条ignoreQualifiersAtRuntime属性即可

java.lang.IllegalStateException: Failed to load ApplicationContext
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactory' threw exception; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file [H:\User\Administrator\IntelliJProjects\SpringBootProject\codegen-java\codegen-dao\target\classes\mappers\TGenResultTemplatePropMapper.xml]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.codegen.dao.TGenResultTemplatePropMapper.BaseResultMap
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:582)
	... 78 more
Caused by: org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file [H:\User\Administrator\IntelliJProjects\SpringBootProject\codegen-java\codegen-dao\target\classes\mappers\TGenResultTemplatePropMapper.xml]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.codegen.dao.TGenResultTemplatePropMapper.BaseResultMap
	at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:523)
	at org.mybatis.spring.SqlSessionFactoryBean.afterPropertiesSet(SqlSessionFactoryBean.java:380)
	at org.mybatis.spring.SqlSessionFactoryBean.getObject(SqlSessionFactoryBean.java:547)
	at org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration.sqlSessionFactory(MybatisAutoConfiguration.java:153)
	at org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration$$EnhancerBySpringCGLIB$$67009919.CGLIB$sqlSessionFactory$0(<generated>)
	at org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration$$EnhancerBySpringCGLIB$$67009919$$FastClassBySpringCGLIB$$6a893377.invoke(<generated>)
	at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361)
	at org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration$$EnhancerBySpringCGLIB$$67009919.sqlSessionFactory(<generated>)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
	... 79 more
Caused by: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.codegen.dao.TGenResultTemplatePropMapper.BaseResultMap
	at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:120)
	at org.apache.ibatis.builder.xml.XMLMapperBuilder.parse(XMLMapperBuilder.java:92)
	at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:521)
	... 92 more
Caused by: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.codegen.dao.TGenResultTemplatePropMapper.BaseResultMap
	at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:859)
	at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:831)
	at org.apache.ibatis.session.Configuration.addResultMap(Configuration.java:613)
	at org.apache.ibatis.builder.MapperBuilderAssistant.addResultMap(MapperBuilderAssistant.java:214)
	at org.apache.ibatis.builder.ResultMapResolver.resolve(ResultMapResolver.java:47)
	at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:285)
	at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:252)
	at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElements(XMLMapperBuilder.java:244)
	at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:116)
	... 94 more