mybatis generator自動生成代碼報The error occurred while processing mapper_resultMap[BaseResultMap]錯誤的解決方法

今天在用mybatis自動生成代碼以後遇到了一個錯誤：html

 
         org.apache.ibatis.exceptions.PersistenceException : 
        
         ### Error building SqlSession. 
        
         ### The error may exist in com/erp/webservice/mapper/UsersMapper.xml 
        
         ### The error occurred  
         while 
         processing mapper_resultMap[BaseResultMap] 
        
         ### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.lang.RuntimeException: Error parsing Mapper XML. Cause: java.lang.IllegalArgumentException : Result Maps collection already contains value  
         for 
         com.erp.webservice.inter.UsersMapper.BaseResultMap 
        
         at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java: 
         23 
         ) 
        
         at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java: 
         51 
         ) 
        
         at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java: 
         35 
         ) 
        
         at com.erp.webservice.test.Test.<clinit>( Test.java: 
         22 
         ) 
        
         Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.lang.RuntimeException: Error parsing Mapper XML. Cause: java.lang.IllegalArgumentException : Result Maps collection already contains value  
         for 
         com.erp.webservice.inter.UsersMapper.BaseResultMap 
        
         at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java: 
         107 
         ) 
        
         at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java: 
         89 
         ) 
        
         at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java: 
         49 
         ) 
        
         ...  
         2 
         more 
        
         Caused by: java.lang.RuntimeException: Error parsing Mapper XML. Cause: java.lang.IllegalArgumentException : Result Maps collection already contains value  
         for 
         com.erp.webservice.inter.UsersMapper.BaseResultMap 
        
         at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java: 
         113 
         ) 
        
         at org.apache.ibatis.builder.xml.XMLMapperBuilder.parse(XMLMapperBuilder.java: 
         88 
         ) 
        
         at org.apache.ibatis.builder.xml.XMLConfigBuilder.mapperElement(XMLConfigBuilder.java: 
         325 
         ) 
        
         at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java: 
         105 
         ) 
        
         ...  
         4 
         more 
        
         Caused by: java.lang.IllegalArgumentException: Result Maps collection already contains value  
         for 
         com.erp.webservice.inter.UsersMapper.BaseResultMap 
        
         at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java: 
         710 
         ) 
        
         at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java: 
         682 
         ) 
        
         at org.apache.ibatis.session.Configuration.addResultMap(Configuration.java: 
         473 
         ) 
        
         at org.apache.ibatis.builder.MapperBuilderAssistant.addResultMap(MapperBuilderAssistant.java: 
         204 
         ) 
        
         at org.apache.ibatis.builder.ResultMapResolver.resolve(ResultMapResolver.java: 
         44 
         ) 
        
         at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java: 
         277 
         ) 
        
         at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java: 
         244 
         ) 
        
         at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElements(XMLMapperBuilder.java: 
         236 
         ) 
        
         at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java: 
         109 
         ) 
        
         ...  
         7 
         more 
        
         Exception in thread  
         "main" 
         java.lang.NullPointerException 
        
         at com.erp.webservice.test.Test.main( Test.java: 
         29 
         )

後來發現是我運行了屢次自動生成代碼的程序，致使了com/erp/webservice/mapper/UsersMapper.xml的內容多出來不少，原來自動生成代碼的時候生成的XML代碼不是覆蓋原來的，而是附加的XML的尾部的。java

第一次運行自動生成代碼程序：web

第二次運行自動生成代碼程序：apache

看看，XML文件明顯大了不少，只要刪掉原來的XML而後從新運行自動生成代碼的程序便可。session

或者去工做空間吧生成的東西都刪除一邊從新生成mybatis