java.lang.IllegalArgumentException: The given id must not be null!

嚴重: Servlet.service() for servlet [dispatcher] in context with path 
[/sxnd-erp] threw exception 
[Request processing failed; 
	nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: 
	The given id must not be null!
 
; 
	nested exception is java.lang.IllegalArgumentException: 
	The given id must not be null!] 
with root cause
java.lang.IllegalArgumentException: The given id must not be null!
	at org.springframework.util.Assert.notNull(Assert.java:193)
	at org.springframework.data.jpa.repository.support.SimpleJpaRepository.
 
findById(SimpleJpaRepository.java:223)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	...
	at com.sxnd.service.ReceiptBillService.saveBill(ReceiptBillService.java:65)
	at com.sxnd.service.ReceiptBillService$$FastClassBySpringCGLIB$$b3d3a1d5.invoke(<generated>)
	...
	at com.sxnd.
 
service.ReceiptBillService$$EnhancerBySpringCGLIB$$b4572171.saveBill(<generated>)
	...

報錯：500

原因：js中的warehouseid和bean中的warehouseId沒有對應上