dialectKey为空导致NullPointerException

[Elin-Zhou]

Mybatis-PageHelper/src/main/java/com/github/pagehelper/page/PageAutoDialect.java

Line 235 in 9435e52

return autoDialectDelegate.extractDialect(dialectKey, ms, dataSource, properties);

当判断dialectKey == null时，执行autoDialectDelegate.extractDialect(dialectKey, ms, dataSource, properties); autoDialectDelegate的默认实现类是DataSourceNegotiationAutoDialect，会执DataSourceNegotiationAutoDialect.java:73代码，urlMap.containsKey(dialectKey)，dialectKey为null，直接抛出NPE