About Result Maps collection already contains value for...Error

I encountered an error today. Result Maps collection already contains value for...

The error message is as follows:

Caused by: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.java.zxf.dao.CountLoginTriedTimesDao.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:466)
	... 65 more
Caused by: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.java.zxf.dao.CountLoginTriedTimesDao.BaseResultMap
	at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:802)
	at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:774)
	at org.apache.ibatis.session.Configuration.addResultMap(Configuration.java:556)
	at org.apache.ibatis.builder.MapperBuilderAssistant.addResultMap(MapperBuilderAssistant.java:217)
	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)
	... 67 more

To the effect that the result set already exists in my CountLoginTriedTimesDao.xml

I went to the xml to have a look. Sure enough, there are two BaseResultMaps; in fact, there are not only two BaseResultMaps, but all the methods of adding, deleting, modifying and checking have double copies, just delete the duplicates.

More：

So why does this happen?

I used mybatis to reverse engineer the relevant mapping files, and I didn't find any duplicate content when I first generated them?

After thinking about it carefully, it is because I modified the table structure of the database after the first generation, and then regenerated it again;

When generating the second time, instead of deleting the first generated class and xml file, I ran it directly, and it was successful. The prompt was that these files were all overridden. A new one is added after the original;

Solution:

1. The quicker and easier way is to delete the file you generated for the first time, and then generate the file for the second time;

2. To analyze the source code, modify the source code or write plug-ins by yourself, you can refer to this article: https://my.oschina.net/u/137785/blog/736372