定义返回列表的 REST 端点

Question

如何从控制器类返回列表？

我当前的代码：

@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);
}

我收到的错误：

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);
}

我不确定下一个定义。

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

Answer 1

您应该如下定义您的端点：

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

请注意，您不能在同一字段中同时拥有 @RequestBody 和 @RequestParam。该字段是 HTTP 请求正文或 HTTP 请求参数。

Answer 2

您必须在 ReponseEntity 类中返回“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);
}