检查过程

1.确认数据库版本为5.7或5.1  select version();

2.linux环境下：需要检查大小写不敏感配置开启；

show global variables like '%case%';
+------------------------+-------+
| Variable_name          | Value |
+------------------------+-------+
| lower_case_file_system | ON    |
| lower_case_table_names | 0     |

3.检查jdbc配置文件格式

4.检查通过客户端测试的连接配置和数据库访问状态

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常见报错类型

Connections could not be acquired from the underlying database!

could not create connection to database server.