解決（springboot項目）mysql表名大寫，形成jpa Table doesn't exist問題

這個問題有2種解決方法：

個人報錯是：html

java.sql.SQLSyntaxErrorException: Table 'gaei_ms.gaei_work_task' doesn't exist

方法一：

轉自：https://confluence.atlassian.com/fishkb/table-xxx-doesn-t-exist-error-with-mysql-server-302810019.html

2012-09-05 10:12:30,728 ERROR [btpool0-472 ] fisheye.app TotalityFilter-logExceptionDetails - Exception "com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'fecru.AO_B434B9_WEB_HOOK' doesn't exist" (net.java.ao.sql.ActiveObjectSqlException) while processing "/plugins/servlet/webhooks/list" (Referer:"https://fisheye.bln.native-instruments.de/admin/viewServerSettings.do")
net.java.ao.sql.ActiveObjectSqlException: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'fecru.AO_B434B9_WEB_HOOK' doesn't exist
	at com.atlassian.activeobjects.internal.EntityManagedActiveObjects.find(EntityManagedActiveObjects.java:114)
	at com.atlassian.activeobjects.osgi.DelegatingActiveObjects.find(DelegatingActiveObjects.java:71)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
...
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'fecru.AO_B434B9_WEB_HOOK' doesn't exist

緣由：

MySQL對lower_case_table_names使用區分大小寫的表名比較設置  （可能值爲'0'）。可是，FishEye在表名  FE-4276中不一致-數據庫表OPEN的大小寫不一致。您能夠使用如下查詢確認設置： java

show variables like 'lower_case_table_names'; show variables like 'lower_case_table_names';

解決：

1.  在MySQL中設置  lower_case_table_names的值爲'0'
2. 從新啓動MySQL和FishEye / Crucible。

方法二：

個人改法是在配置文件中加上這一行：mysql

spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl

如下轉自：https://blog.csdn.net/Halleycomett/article/details/78638639

報錯信息

org.springframework.dao.InvalidDataAccessResourceUsageException: could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet

 Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table XXX doesn't exist

報錯緣由調查

mysql裏實際表名都是大寫web

嘗試在entity上標記表名大寫，實際測試無效，仍然找不到表spring

@Entity
@Data
@Table(name = "T_BASE_ORDER_PRINT_CLIENT")
public class MerchantPrinter {

    @Id
    @Column(name = "print_client_id")
    private String id;

    @Column(name = "merchant_id")
    private String merchantId;

    private String imei;

}

最終的解決方案

在spring jpa配置中增長physical-strategy配置解決問題

spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://XXX:3306/dbname
    username: root
    password: *******
    schema:
  jpa:
    hibernate:
      ddl-auto: none
      naming:
        physical-strategy:  org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
    show-sql: true

physical naming strategy ：used to convert a 「logical name」 (either implicit or explicit) name of a table or column into a physical name (e.g. following corporate naming guidelines) 
physical naming strategy：物理命名策略，用於轉換「邏輯名稱」(隱式或顯式)的表或列成一個物理名稱sql