[开发测试]HttpClient中，使用HttpDelete，HttpGet时无法携带body的解决办法

今天在使用HttpDelete执行DELETE操作的时候，发现HttpDelete不支持setEntity方法，所以不能携带body信息。
????????其原因是在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。

1、httpclient get 传json字符串作为参数

????????我们的解决方案是重写一个MyHttpGet类，继承自HttpEntityEnclosingRequestBase，覆盖其中的getMethod方法，从而返回GET。

class HttpGetWithBody extends HttpEntityEnclosingRequestBase {
    public static final String METHOD_NAME = "GET";

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

    HttpGetWithBody(final URI uri) {
        super();
        setURI(uri);
    }

    HttpGetWithBody() {
        super();
    }

    public String getMethod() {
        return METHOD_NAME;
    }
}

?2、调用方式

public static String doGet(String url, Map<String, String> headers, List<String> idList) {
        CloseableHttpClient httpclient = getHttpClient();
        CloseableHttpResponse response = null;
        try {
            HttpGetWithBody httpGet = new HttpGetWithBody(url);
            setHeader(httpGet, headers);
            httpGet.setEntity(new StringEntity(idList.toString()));
            response = httpclient.execute(httpGet);
            return getResult(response);
        } catch (Exception e) {
            log.error("HttpUtil.doGet error,url:{},Header:{}", url, JSON.toJSONString(headers), e);
        } finally {
            closeClient(httpclient, response);
        }
        return null;
    }

3、httpclient delete 传json字符串作为参数

????????我们的解决方案是重写一个MyHttpDelete类，继承自HttpEntityEnclosingRequestBase，覆盖其中的getMethod方法，从而返回Delete。

public class HttpDelete extends HttpRequestBase {
    public static final String METHOD_NAME = "DELETE";

    public HttpDelete() {
    }

    public HttpDelete(URI uri) {
        this.setURI(uri);
    }

    public HttpDelete(String uri) {
        this.setURI(URI.create(uri));
    }

    public String getMethod() {
        return "DELETE";
    }
}

4、调用方式

public static String doDelete(String url, Map<String, Object> params, Map<String, String> headers) {
        CloseableHttpClient httpClient = null;
        CloseableHttpResponse response = null;
        try {
            httpClient = getHttpClient();
            StringBuilder urlBuilder = new StringBuilder(url);
            int i = 0;
            if (params != null) {
                for (Map.Entry<String, Object> entry : params.entrySet()) {
                    urlBuilder.append((i == 0) ? "?" : "&");
                    urlBuilder.append(entry.getKey()).append("=").append(entry.getValue());
                    i++;
                }
            }
            HttpDelete httpDelete = new HttpDelete(urlBuilder.toString());
            setHeader(httpDelete, headers);
            response = httpClient.execute(httpDelete);
            return getResult(response);
        } catch (Exception e) {
            log.error("HttpUtil.doDelete error,url:{},params:{},Header:{}", url, JSON.toJSONString(params), JSON.toJSONString(headers), e);
        } finally {
            closeClient(httpClient, response);
        }
        return null;
    }

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