MyBatis MapperProvider MessageFormat拼接批量SQL语句执行报错
发布时间:2016-11-27 17:36:23 所属栏目:大数据 来源:站长网
导读:最近在项目中有这么一段代码:下载服务器基础业务数据进行本地批量插入操作,因项目中使用mybatis进行持久化操作,故直接考虑使用mybatis的批量插入功能。 1.以下是Mapper接口的部分代码 public interface PrintMapper{@InsertProvider(type = PrintMapper
最近在项目中有这么一段代码:下载服务器基础业务数据进行本地批量插入操作,因项目中使用mybatis进行持久化操作,故直接考虑使用mybatis的批量插入功能。 1.以下是Mapper接口的部分代码 public interface PrintMapper { @InsertProvider(type = PrintMapperProvider.class,method = "insertAllLotWithVehicleCode4H2") void insertAllLotWithVehicleCode(Listlt;LotWithVehicleCodeBOgt; lotWithVehicleCodes); } 2.对应MapperProvider中函数片段 public String insertAllLotWithVehicleCode4H2(Maplt;String,Listlt;LotWithVehicleCodeBOgt;gt; map) { Listlt;LotWithVehicleCodeBOgt; lotWithVehicleCodeBOs = map.get("list"); StringBuilder sb = new StringBuilder("INSERT INTO MTC_LOT_WITH_VEHICLE_CODE (LOT_CODE,PRODUCT_VEHICLE_CODE) VALUES "); MessageFormat messageFormat = new MessageFormat("(" + "#'{'list[{0}].lotCode }," + "#'{'list[{0}].productVehicleCode }" + ")"); int size = lotWithVehicleCodeBOs.size(); for (int i = 0; i lt; size; i++) { sb.append(messageFormat.format(new Object[]{i})); if (i lt; size - 1) sb.append(","); } return sb.toString(); } 3.service层 @Transactionalpublic void synchLotWithVehicleCodeToLocalDB(Listlt;LotWithVehicleCodeBOgt; lotWithVehicleCodeBOs) { if(null != lotWithVehicleCodeBOs lotWithVehicleCodeBOs.size()gt;0) { printMapper.insertAllLotWithVehicleCode(lotWithVehicleCodeBOs); } } 程序上线的时候没有发生问题,在业务量猛增的时候,大约同时执行500条以上的时候程序就开始报错: Caused by: org.apache.ibatis.builder.BuilderException: Improper inline parameter map format. Should be: #{propName,attr1=val1,attr2=val2} at org.apache.ibatis.builder.SqlSourceBuilder$ParameterMappingTokenHandler.buildParameterMapping(SqlSourceBuilder.java:89) at org.apache.ibatis.builder.SqlSourceBuilder$ParameterMappingTokenHandler.handleToken(SqlSourceBuilder.java:43) at org.apache.ibatis.parsing.GenericTokenParser.parse(GenericTokenParser.java:25) at org.apache.ibatis.builder.SqlSourceBuilder.parse(SqlSourceBuilder.java:24) at org.apache.ibatis.builder.annotation.ProviderSqlSource.createSqlSource(ProviderSqlSource.java:57) ... 61 more 异常已指明SQL语句构建问题,DEBUG进去: 问题根源: MessageFormat messageFormat = new MessageFormat("(" + "#'{'list[{0}].lotCode }," + "#'{'list[{0}].productVehicleCode }," + ")"); int size = lotWithVehicleCodeBOs.size(); for (int i = 0; i lt; size; i++) { sb.append(messageFormat.format(new Object[]{i})); if (ilt;size-1) sb.append(","); } 当size达到3位数以上时构建出的message为: (#{list[1,000].lotCode },#{list[1,000].productVehicleCode }) 解决办法:messageFormat.format(new Object[]{i+""} (编辑:开发网_开封站长网) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |