如何使用groovy传递可选查询参数？

我想使用micronaut和groovy将可选参数传递到url。我做了很多研究，但没有找到任何相关的答案

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

我想把sort和date作为可选参数传递给这个url。

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谢谢你的帮助

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的方式调用：

$ 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.

或无日期：

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

或无排序和日期：

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

必须为查询参数添加@QueryValue注释的帖子示例：

@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."
}

可以这样说：

$ 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.

---

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的方式调用：

$ 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.

或无日期：

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

或无排序和日期：

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

必须为查询参数添加@QueryValue注释的帖子示例：

@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."
}

可以这样说：

$ 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.

---

使用可选注释，如

@Get("/optional")
String optional(@QueryValue Optional<Integer> max) {
  return "Parameter Value: " + max.orElse(10);
}

---

使用可选注释，如

@Get("/optional")
String optional(@QueryValue Optional<Integer> max) {
  return "Parameter Value: " + max.orElse(10);
}

---

伟大的谢谢，这很有效。有没有办法通过@Post-request传递参数？我还添加了Post-request的示例。您必须为查询参数添加@QueryValue注释，否则它将尝试从body加载它们。太好了！谢谢，这很有效。有没有办法通过@Post-request传递参数？我还添加了Post-request的示例。您必须为查询参数添加@QueryValue注释，否则它将尝试从正文中加载这些参数。