java - 如何在Spring中添加/设置查询参数？

Question

所以我一直在我的网址中添加查询参数，例如

[URL]/?param1=value1&param2=value2

但是我该如何像在 HTTP header 中那样做到这一点，可以像这样设置。

private HttpHeaders generateCredetialsHeader() {
    HttpHeaders headers = new HttpHeaders();
    headers.add("ClientId", clientId);
    headers.add("ClientSecret",clientSecret);
    return headers;
    }

Answer 1

使用UriComponentsBuilder :

String urlTemplate = "https://example.com/hotels/42?param1={p1}&param2={p2}";

String url = UriComponentsBuilder.fromHttpUrl(urlTemplate)
        .buildAndExpand("value1", "value2")
        .toUriString();

// Or:
String url = UriComponentsBuilder.fromHttpUrl(urlTemplate)
        .buildAndExpand(Map.of("p1", "value1",
                               "p2", "value2"))
        .toUriString();

或者，不要将其作为模板，而是单独添加查询参数:

String url = UriComponentsBuilder.fromHttpUrl("https://example.com/hotels/42")
        .queryParam("param1", "value1")
        .queryParam("param2", "value3")
        .toUriString();