定义返回列表的 REST 端点

Question

如何从控制器类返回列表？

我目前的代码：

@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>

该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

您应该按如下方式定义端点：@PostMapping(value = Endpoint.RRESOURCE_customer_ID)public List<CustomerDto> getLocationsByLocationIds(@RequestBody List<Long> ids) {&nbsp; &nbsp; return customerService.findcustomerIds(ids);}请注意，您不能同时拥有@RequestBody和@RequestParam。该字段是任一的HTTP请求体或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)@ResponseBodypublic ResponseEntity<List<customerDto> > getLocationsByLocationIds(@RequestParam List<Long> ids) {&nbsp; &nbsp; &nbsp; List<customerDto> customerListDto = customerService.findcustomerIds(ids);&nbsp; &nbsp; &nbsp; return ResponseEntity.ok(customerListDto);}