java发起application/x-www-form-urlencoded格式的post请求

  话不多说，直接上代码。

    public static String postXwwFormUrlEncoded(String url, HashMap<String, String> paraMap) throws IOException {
    
    
        List<NameValuePair> params = new ArrayList<>();
        HttpClient client = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);
        String msg = "";
        try {
    
    
            if (paraMap != null && paraMap.size() != 0) {
    
    
                for (Map.Entry<String, String> entry : paraMap.entrySet()) {
    
    
                    params.add(new NameValuePair() {
    
    
                        @Override
                        public String getName() {
    
    
                            return entry.getKey();
                        }
                        @Override
                        public String getValue() {
    
    
                            return entry.getValue();
                        }
                    });
                }
            }
            httpPost.setEntity(new UrlEncodedFormEntity(params, StandardCharsets.UTF_8));
            httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");
            HttpResponse response = client.execute(httpPost);
            int statusCode = response.getStatusLine().getStatusCode();
            if (HttpURLConnection.HTTP_OK == statusCode) {
    
    
                HttpEntity entity = response.getEntity();
                msg = EntityUtils.toString(entity);
            }else {
    
    
            	return "{\"status\": \"0\",\"desc\": \"接口请求异常\"}";
            }
        } catch (IOException e) {
    
    
            throw e;
        }
        return msg;
    }

  其中url为接口请求地址，paraMap为参数Map。注意上面写法需要引入依赖

		<dependency>
			<groupId>org.apache.httpcomponents</groupId>
			<artifactId>httpclient</artifactId>
		</dependency>