java 用戶端發起http請求2

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用戶端請求方式一，如果資料類型為 x-www-form-urlencoded

用到的json jar包為 gradle （‘com.alibaba:fastjson:1.2.38‘,）

那麼對應的程式碼片段為：

val url = "http://www.unionpayintl.com/cardholderServ/serviceCenter/rate/search"        val params = mutableListOf<NameValuePair>()        val pair = BasicNameValuePair("curDate", SimpleDateFormat("yyyy-MM-dd").format(Date()))        params.add(pair)        val client = HttpClients.createDefault()        val httpPost = HttpPost(url)        try {            httpPost.entity = UrlEncodedFormEntity(params, "UTF-8")            httpPost.setHeader("Content-type", "application/x-www-form-urlencoded")            val response = client.execute(httpPost)            val statusCode = response.statusLine.statusCode            if (statusCode == 200) {                val entity = response.entity                val s = EntityUtils.toString(entity)                println(JSONObject.parseObject(s))                return JSONObject.parseObject(s).getDoubleValue("exchangeRate")            }        } catch (e: IOException) {            e.printStackTrace()        }

如果請求的資料是json格式，則

val url = "http://www.baidu.com？id=12&name=3"        try {            val result = HttpUtils.get(url)            val json = JSONObject.parseObject(result)        } catch (e: Exception) {            e.printStackTrace()        }

 

java 用戶端發起http請求2