定義返回列表的REST端點

Question

如何從控制器類返回列表？

我當前的代碼：

@PostMapping(value = Endpoint.RRESOURCE_customer_ID)
public ResponseEntity<customerDto> getLocationsByLocationIds(@RequestBody @Validated @RequestParam(name = "ids", required = true) List<Long> ids) {
      List<customerDto> customerListDto = customerService.findcustomerIds(ids);
      return ResponseEntity.ok(customerListDto);
}

我收到的錯誤：

 Error:(51, 41) java: incompatible types: inference variable T has incompatible bounds equality constraints: com.testclass.cust.common.dto.output.CustomerDto lower bounds: java.util.List<com.customer.common.dto.output.CustomerDto> 

findcustomerIds方法：

@Transactional
public List<customerDto> findcustomerIds(List<Long> customerIds) {
    List<customer> customerList = repository.findAll(customerIds);
    return mapper.mapAsList(customerList, customerDto.class);
}

我不確定下一個定義。

public ResponseEntity<customerDto> getLocationsByLocationIds(@RequestBody @Validated @RequestParam(name ="ids", required = true) List<Long> ids)

Answer 1

您應該如下定義端點：

@PostMapping(value = Endpoint.RRESOURCE_customer_ID)
public List<CustomerDto> getLocationsByLocationIds(@RequestBody List<Long> ids) {
    return customerService.findcustomerIds(ids);
}

請注意，您不能在同一字段上同時使用@RequestBody和@RequestParam 。 該字段是所述HTTP請求體或HTTP請求參數。

Answer 2

您必須在ReponseEntity類中返回“ customerDto”列表

@PostMapping(value = Endpoint.RRESOURCE_customer_ID)
@ResponseBody
public ResponseEntity<List<customerDto> > getLocationsByLocationIds(@RequestParam List<Long> ids) {
      List<customerDto> customerListDto = customerService.findcustomerIds(ids);
      return ResponseEntity.ok(customerListDto);
}