Question

我已经编写了此请求映射，以使用可选请求参数ticketType＆ticketStatus的ID通过票证访问票证：

@GetMapping(path = "/tickets/{ticketId}")
   @ResponseStatus(value = HttpStatus.OK)
    public ResponseEntity<List<TicketResponse>> getTicketsById(@PathVariable("ticketId") final Long ticketId, @RequestParam("ticketType") final String ticketType, @RequestParam("ticketStatus") final String ticketStatus)

当前存储库包含用于基于ticketId或ticketState返回的方法：

    @Repository
    public interface TicketRepository extends JpaRepository<TicketEntity, Long> {

Stream<TicketEntity> findByTicketIdAndTicketState(@Param("ticketId") Long ticketId);

Stream<TicketEntity> findByTicketIdAndTicketState(@Param("ticketId") Long ticketId, @Param("ticketState") String ticketState);

    }

这些端点应如何在控制器层公开？

当前端点为：

@GetMapping(path = "/{ticketId}")
    @ResponseStatus(value = HttpStatus.OK)
    public ResponseEntity<List<TicketResponse>> getTicketsByTicketId(
            @PathVariable("productId") final Long ticketId, @RequestParam(name = "ticketState", required=false) final String ticketState) {

        final List<TicketResponse> ticketsByTicketId = ticketService.getTicketsByTicketId(ticketId);

        if(ticketsByTicketId.size() == 0){
            return ResponseEntity.ok("No tickets found");
        }
        else {
            return ResponseEntity.ok(ticketsByTicketId);
        }

    }

我应该添加一个新的端点吗？：

或更新控制器以根据查询选择要实现的JPA存储库方法？：

@GetMapping(path = "/{ticketId}")
    @ResponseStatus(value = HttpStatus.OK)
    public ResponseEntity<List<TicketResponse>> getTicketsByTicketId(
            @PathVariable("productId") final Long ticketId, @RequestParam(name = "ticketState", required=false) final String ticketState) {

List<TicketResponse> tickets = null;

if(ticketState == null) {
        tickets = ticketService.getTicketsByTicketId(ticketId);
}
else{
tickets = ticketService.getTicketsByTicketIdAndTicketState(ticketId, ticketState);
}

        if(ticketsByTicketId.size() == 0){
            return ResponseEntity.ok("No tickets found");
        }
        else {
            return ResponseEntity.ok(ticketsByTicketId);
        }

    }

JPA存储库将进一步扩展以基于更多的参数（例如ticketType，ticketDescription）进行过滤。我只是提到这一点，因为如果需要检查哪个参数为null并选择相关的JPA查询，我的控制器逻辑将变得非常复杂。

Answer 1

使用Spring Data JPA Specification可以解决此地图过滤问题。可以使用Criteria API构建复杂的查询，具体取决于过滤参数。

A good article about JPA Specification

将控制器端点映射到Spring JPA层

1 个答案: