如何使用 groovy 传递可选查询参数？

Question

我想使用 micronaut 和 groovy 将可选参数传递给 url。我做了很多研究，但找不到任何相关的答案。

@Get('/product/{country}/?

我想将排序和日期作为可选参数传递给此网址。感谢你的帮助。

Answer 1

您可以将可选的排序和日期参数作为查询值传递，如下所示：

@Controller('/')
@CompileStatic
class WithOptionalParameterController {
    @Get('/product/{country}{?sort,date}')
    String productsForCountry(String country, 
                              @Nullable @Pattern(regexp = 'code|title') String sort, 
                              @Nullable String date) {
        "Products for $country sorted by $sort and there is also date $date."
    }
}

可以通过指定排序和日期来调用它：

$ curl 'http://localhost:8080/product/chile?sort=code&date=23.3.2020'
Products for chile sorted by code and there is also date 23.3.2020.

或者没有日期：

$ curl 'http://localhost:8080/product/chile?sort=code'
Products for chile sorted by code and there is also date null.

或者没有排序和日期：

$ curl 'http://localhost:8080/product/chile'
Products for chile sorted by null and there is also date null.

POST 示例，您必须@QueryValue为查询参数添加注释：

@Consumes([MediaType.TEXT_PLAIN])
@Post('/product/{country}{?sort,date}')
String productsForCountry(String country, 
                          @Nullable @Pattern(regexp = 'code|title') @QueryValue String sort,
                          @Nullable @QueryValue String date,
                          @Body String body) {
    "Products for $country sorted by $sort and there is also date $date. Body is $body."
}

可以这样调用：

$ curl -X POST 'http://localhost:8080/product/chile?sort=code&date=23.3.2020' -H "Content-Type: text/plain" -d 'some body'
Products for chile sorted by code and there is also date 23.3.2020. Body is some body.