[开发工具]Java 调用参数类型是application/x-www-form-urlencoded的API

一、分析

首先用postman测试对应的接口，测试如下

?其中请求头中content-type为application/x-www-form-urlencoded

参数是：queryParam：{"id":"mobile","userName":"name","mobile":"12345678"}

注意：我们进行API调用时，参数需要转为String类型，平时我们调用get请求application/x-www-form-urlencoded参数都是直接拼接在url后面，? ? ? ? ? ? ? ? ? ? ? ? ? ??url?字段名=值&字段名=值，所以这里用同样的方式进行参数处理。

二、代码样例

public String getNameCode(String name，String phone) throws Exception {
        // 1.组装数据，以及请求头
        Map header = new HashMap();
        String newParam = "queryParam={\"id\":\"mobile\",\"userName\":\""+name+"\",\"mobile\":\""+phone+"\"}";
        header.put("content-type","application/x-www-form-urlencoded");
        // 3.调用接口查询
        String testRst = HttpUtil.doPost("http://localhost/sv/query",newParam,header);
        if(testRst==null){
            throw new Exception("bomc接口响应失败，请稍后重试");
        }
        // 4.解析结果集
        JSONObject json = JSONObject.parseObject(testRst);
        JSONArray item = json.getJSONArray("items");
        JSONObject obj = item.getJSONObject(0);
        String account = (String) obj.get("userAccount");
        return account;
}

public static String doPost(String url, String params, Map header) throws Exception {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);// 创建httpPost
        logger.info("POST请求url：" + url);
        for (Iterator iter = header.keySet().iterator(); iter.hasNext(); ) {
            String key = String.valueOf(iter.next());
            String value = String.valueOf(header.get(key));
            httpPost.setHeader(key, value);
        }
        RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(20000)
                .setSocketTimeout(20000).setConnectTimeout(20000).build();
        httpPost.setConfig(requestConfig);
        //设置参数
        logger.info("POST请求参数：" + params);

        StringEntity entity = new StringEntity(params, "utf-8");
        entity.setContentEncoding("UTF-8");
        entity.setContentType("application/json");
        httpPost.setEntity(entity);
        CloseableHttpResponse response = null;
        try {
            response = httpclient.execute(httpPost);
            StatusLine status = response.getStatusLine();
            int state = status.getStatusCode();
            if (state == HttpStatus.SC_OK) {
                HttpEntity responseEntity = response.getEntity();
                String jsonString = EntityUtils.toString(responseEntity,"UTF-8");
                return jsonString;
            } else {
                logger.error("请求返回:" + state + "(" + url + ")");
            }
        } finally {
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            try {
                httpclient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
}