【hibernate 报错】No serializer found for class org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer 【get和load的区别】

/**
* 进行产品修改操作
* @return
*/
@ResponseBody
@RequestMapping("/Updateproduct")
@Transactional
public Product updateProduct2(Product product){
Product  product1 = productService.get(product.getProductId());
if(product1 != null){
product1.setProductName(product.getProductName());
product1.setProductCre(product.getProductCre());
}

return product1;
}