1.?org.springframework.dao.DuplicateKeyException:
### Error updating database.? Cause: java.sql.SQLIntegrityConstraintViolationException: Duplicate entry '0' for key 'PRIMARY'
? ? 主鍵沖突?
2.?類型轉(zhuǎn)換異常:java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to com.