Java请求调用参数格式为form-data类型的接口

接口参数使用postman调用如图所示，只能使用form-data格式调用

使用java代码发送http请求实现此种方式的接口调用

public static String doPostForm(String url, HashMap<String, String> map) throws Exception {        String result = "";        CloseableHttpClient client = null;        CloseableHttpResponse response = null;        RequestConfig defaultRequestConfig = RequestConfig.custom().setSocketTimeout(550000).setConnectTimeout(550000)                .setConnectionRequestTimeout(550000).setStaleConnectionCheckEnabled(true).build();        client = HttpClients.custom().setDefaultRequestConfig(defaultRequestConfig).build();        // client = HttpClients.createDefault();        URIBuilder uriBuilder = new URIBuilder(url);        HttpPost httpPost = new HttpPost(uriBuilder.build());        httpPost.setHeader("Connection", "Keep-Alive");        httpPost.setHeader("Charset", "UTF-8");        httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded");        Iterator<Map.Entry<String, String>> it = map.entrySet().iterator();        List<NameValuePair> params = new ArrayList<NameValuePair>();        while (it.hasNext()) {            Map.Entry<String, String> entry = it.next();            NameValuePair pair = new BasicNameValuePair(entry.getKey(), entry.getValue());            params.add(pair);        }        httpPost.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));        try {            response = client.execute(httpPost);            if (response != null) {                HttpEntity resEntity = response.getEntity();                if (resEntity != null) {                    result = EntityUtils.toString(resEntity, "UTF-8");                }            }        } catch (ClientProtocolException e) {            throw new RuntimeException("创建连接失败" + e);        } catch (IOException e) {            throw new RuntimeException("创建连接失败" + e);        }        return result;    }

特别说明：form的Content-Type属性为编码方式

• 常用有两种：application/x-www-form-urlencoded和multipart/form-data，默认为application/x-www-form-urlencoded。
• x-www-form-urlencoded：当action为get时候，浏览器用x-www-form-urlencoded的编码方式把form数据转换成一个字串（name1=value1&name2=value2…），然后把这个字串append到url后面，用?分割，加载这个新的url。
• multipart/form-data：当action为post时候，浏览器把form数据封装到http body中，然后发送到server。 如果没有type=file的控件，用默认的application/x-www-form-urlencoded就可以了。 但是如果有type=file的话，就要用到multipart/form-data了。浏览器会把整个表单以控件为单位分割，并为每个部分加上Content-Disposition(form-data或者file),Content-Type(默认为text/plain),name(控件name)等信息，并加上分割符(boundary)。

来源地址：https://blog.csdn.net/weixin_44949150/article/details/129408883