MyBatis MapperProvider MessageFormat拼接批量SQL语句执行报错的原因分析及解决办法

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。

代码

rush:sql;"> public interface PrintMapper { @InsertProvider(type = PrintMapperProvider.class,method = "insertAllLotWithVehicleCode4H2") void insertAllLotWithVehicleCode(List lotWithVehicleCodes); }

函数片段

rush:java;"> public String insertAllLotWithVehicleCode4H2(Map> map) { List 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 < size; i++)
{
sb.append(messageformat.format(new Object[]{i}));
if (i < size - 1) sb.append(",");
}
return sb.toString();
}

rush:java;"> @Transactionalpublic void synchLotWithVehicleCodetoLocalDB(List lotWithVehicleCodeBOs) { if(null != lotWithVehicleCodeBOs && lotWithVehicleCodeBOs.size()>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：

rush:java;"> 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：

rush:java;"> messageformat messageformat = new messageformat("(" + "#'{'list[{0}].lotCode }," + "#'{'list[{0}].productVehicleCode }," + ")"); int size = lotWithVehicleCodeBOs.size(); for (int i = 0; i < size; i++) { 　　 sb.append(messageformat.format(new Object[]{i})); 　　if (i

当size达到3位数以上时构建出的message为：

rush:java;"> (#{list[1,000].lotCode },#{list[1,000].productVehicleCode })

解决办法：messageformat.format(new Object[]{i+""}