如何将Java中的HttpStatus代码转换为int？

Question

我正在使用 RestTemplate postForEntity 方法 POST 到端点。如果 POST 成功，statusCode variable 应将其值更改为 201 的状态代码，但我在 Java 中将 HttpStatus 转换为 int 时遇到困难。我收到错误 Cannot cast from HttpStatus to int 我无法得到任何关于此的解决方案。任何建议表示赞赏。

这是我的代码

import org.springframework.http.HttpStatus;

    public int postJson(Set<String> data) {
        int statusCode;
        try {

            ResponseEntity<String> result = restTemplate.postForEntity(url,new HttpEntity<>(request, getHttpHeaders()), String.class);

            statusCode = (int) result.getStatusCode();   

        } catch (Exception e) {
            LOGGER.error("No Post", e);
        }
        return statusCode;
    }
}

Answer 1

Spring 框架 returns 具有 HttpStatus 的枚举：

public class ResponseEntity<T> extends HttpEntity<T> {

    /**
     * Return the HTTP status code of the response.
     * @return the HTTP status as an HttpStatus enum entry
     */
    public HttpStatus getStatusCode() {
        if (this.status instanceof HttpStatus) {
            return (HttpStatus) this.status;
        }
        else {
            return HttpStatus.valueOf((Integer) this.status);
        }
    }
}

枚举定义如下：

public enum HttpStatus {

    // 1xx Informational

    /**
     * {@code 100 Continue}.
     * @see <a href="https://tools.ietf.org/html/rfc7231#section-6.2.1">HTTP/1.1: Semantics and Content, section 6.2.1</a>
     */
    CONTINUE(100, "Continue"),

   // ...
}

因此您可以获得如下状态int：

int statusCode = result.getStatusCode().value();

Answer 2

或者，

您只需使用 getStatusCodeValue() 作为捷径。

import org.springframework.http.HttpStatus;

public int postJson(Set<String> data) {
    int statusCode;
    try {
        ResponseEntity<String> result = restTemplate.postForEntity(url,new HttpEntity<>(request, getHttpHeaders()), String.class);
        statusCode = result.getStatusCodeValue();
    } catch (Exception e) {
        LOGGER.error("No Post", e);
    }
    return statusCode;
}

如何将Java中的HttpStatus代码转换为int？

How to convert HttpStatus code to int in Java?

java

spring

http-status-codes