### Error updating database. Cause: java.sql.SQLIntegrityConstraintViolationException: ORA-02291: 违反完整约束条件 (SSM.SYS_C0011830) - 未找到父项关键字

在向Oracle数据库里面插入数据时发生了以下错误

; ]; ORA-: 违反完整约束条件 (SSM.SYS_C0011830) - 未找到父项关键字
; nested exception is java.sql.SQLIntegrityConstraintViolationException: ORA-: 违反完整约束条件 (SSM.SYS_C0011830) - 未找到父项关键字

    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:)
    org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:)
    org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:)
    org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:)
    org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:)
    org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:)
    org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:)
    org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:)
    org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:)
    org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:)
    org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterInternal(BasicAuthenticationFilter.java:)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:)
    org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:)
    org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:)
    org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:)
    org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:)
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:)
    org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:)
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:)
    org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:)
    org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:)
    org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:)
    org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:)

A表和B表通过主键与中间表C表关联，在向C表中插入数据时，如果插入C表时中数据没有与A表或者B表中主键对应，就会出现该错误。

简而言之就是在插入数据时，中间表的数据必须在它所关联的表中存在。