在类的命名上加一个注解就可以解决:
@IdClass(FreightTemplate.class)
FreightTemplate是当前类的类名;
参考:https://blog.csdn.net/weixin_51509525/article/details/128498669
Spring Data Jpa复合主键的实现
https://download.csdn.net/download/weixin_38670208/12749814
参考:https://blog.csdn.net/kejidaren/article/details/84380753(spring jpa设置多个主键遇到的小坑)
@Data注解
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.10</version>
</dependency>
参考:https://blog.csdn.net/qq_45694568/article/details/120798565
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