HttpDelete携带json参数（body）的方法

Li_XiaoJin

发布于 2022-06-10 21:48:07

2.2K0

发布于 2022-06-10 21:48:07

记录，避免重复造轮子。

我们使用 Httpclient 时常用的请求有2个，HttpPost 和 HttpGet，一般 HttpPost 对传参 Json 的处理是:

HttpPost httpPost= new HttpPost(url);
post.setEntity(new StringEntity(jsonString));

但 HttpDelete 携带 json 参数时，不支持 setEntity 方法，

其中不支持的原因是：在 HttpMethods 中，包含 HttpGet, HttpPost, HttpPut, HttpDelete 等类来实现 http 的常用操作。其中，HttpPost 继承自 HttpEntityEnclosingRequestBase，HttpEntityEnclosingRequestBase 类又实现了 HttpEntityEnclosingRequest 接口，实现了 setEntity 的方法。

而 HttpDelete 继承自HttpRequestBase，没有实现 setEntity 的方法，因此无法设置 HttpEntity 对象。

这里解决的方案是：重写一个自己的 HttpDeleteWithBody 类，继承自 HttpEntityEnclosingRequestBase，覆盖其中的 getMethod 方法，从而返回 DELETE。

HttpDeleteWithBody.java


import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;

import java.net.URI;

public class HttpDeleteWithBody extends HttpEntityEnclosingRequestBase {

    public static final String METHOD_NAME = "DELETE";

    @Override
    public String getMethod() { return METHOD_NAME; }

    public HttpDeleteWithBody(final String uri) {
        super();
        setURI(URI.create(uri));
    }
    public HttpDeleteWithBody(final URI uri) {
        super();
        setURI(uri);
    }
    public HttpDeleteWithBody() { super(); }

}

然后写发送请求的方法：

    public static String sendDelete(String url, String jsonStr, String contentType, Map<String, String> headParam) {

        CloseableHttpResponse response = null;
        String resultString = "";
        // 创建Httpclient对象
        try (CloseableHttpClient httpClient = HttpClients.createDefault();) {
            // 创建HttpDelete请求
            HttpEntityEnclosingRequestBase requestBase = new HttpDeleteWithBody(url);

            RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(30000)
                    .setConnectionRequestTimeout(30000).setSocketTimeout(30000).build();
            requestBase.setConfig(requestConfig);
            requestBase.addHeader("Content-type", !(contentType == null || "".equals(contentType)) ? contentType : "application/json;charset=utf-8");
            requestBase.setHeader("Accept", "application/json");
            packageHeader(headParam, requestBase);

            log.info("requestUrl:{}", url);
            log.info("requestStr:{}", jsonStr);
            // 创建请求内容
            if (jsonStr != null) {
                StringEntity entity = new StringEntity(jsonStr, ContentType.APPLICATION_JSON);
                requestBase.setEntity(entity);
            }
            long beginTime = System.currentTimeMillis();
            // 执行http请求
            response = httpClient.execute(requestBase);
            log.info("接口耗时:{}", System.currentTimeMillis() - beginTime);
            resultString = EntityUtils.toString(response.getEntity(), DEFAULT_CHARSET);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return resultString;
    }

httpclient maven依赖

        <!-- 添加httpClient工具包 -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
            <version>4.5</version>
        </dependency>

End.