带参发送post方式的http请求

[java]代码库

//依赖

        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
            <version>4.5.6</version>
        </dependency>

public static String httpPost(String url, Map<String, Object> param) {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);
        HttpEntity entity = null;
        try {
            MultipartEntityBuilder builder = MultipartEntityBuilder.create();
            ContentType jsonType = ContentType.create("text/json", Charset.forName("utf-8"));
            for ( String key : param.keySet() ) {
                builder.addTextBody(key, JSON.toJSONString( param.get(key) ), jsonType);
            }
            entity = builder.setCharset(CharsetUtils.get("utf-8")).setMode(HttpMultipartMode.BROWSER_COMPATIBLE)
                    .build();
            httpPost.setEntity(entity);
            // 执行发送请求,并获取返回值
            CloseableHttpResponse response = httpClient.execute(httpPost);

            HttpEntity entity2 = response.getEntity();
            String result = "";
            if (entity2 != null) {
                result = EntityUtils.toString(entity2, Charset.defaultCharset());
                System.out.println("response_length: " + entity2.getContentLength());
                System.out.println("response: " + result);
            }
            return result;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }