②HttpURLConnection通过Json参数方式提交Post请求

之前的文章介绍过通过报文的方式HttpURLConnection提交post请求，今天介绍下通过Json参数的方法提交Post请求，先上代码

 public static HttpResponse sendPost(String url, String param, Charset charset) {

        try {

            URL httpurl = new URL(url);

            HttpURLConnection httpConn = (HttpURLConnection) httpurl.openConnection();

            httpConn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; "

                            + "Windows NT 5.1; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)");

            httpConn.setConnectTimeout(CONN_TIMEOUT);

            httpConn.setReadTimeout(READ_TIMEOUT);

            httpConn.setDoOutput(true);

            httpConn.setDoInput(true);

            httpConn.setUseCaches(false);

            httpConn.setRequestMethod("POST");

            httpConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=" + charset.name());

            httpConn.connect();

            OutputStream os = httpConn.getOutputStream();

            PrintWriter out = new PrintWriter(os);

            out.print(param);

            out.flush();

            out.close();

            os.close();

            HttpResponse response = new HttpResponse();

            response.setResponseStatus(httpConn.getResponseCode());

            response.setContentLength(httpConn.getContentLength());

            response.setContentType(httpConn.getContentType());

            response.setHeaderFields(httpConn.getHeaderFields());

            if (response.getResponseStatus() !=  && httpConn.getErrorStream() != null) {

                response.setErrorMessage(new String(IOUtils.readToByte(httpConn.getErrorStream()), charset));

                return response;

            }

            response.setResponseContent(httpConn.getInputStream());

            if (response.getContentType() == null || response.getContentType().startsWith("text")) {

                response.setContext(new String(IOUtils.readToByte(response.getResponseContent()), charset));

            }

            return response;

        }

        catch (IOException e) {

            throw new RuntimeException(String.format("url:%s,param:%s,message:%s", url, param, e.getMessage()), e);

        }

    }

我们先测试下：

 public static void main(String[] args) {

        HttpResponse resp = sendPost("http://www.cnblogs.com/shawWey/", "", Charset.forName("utf-8"));

        System.err.println(resp.getContext());

        System.err.println(resp.getErrorMessage());

    }

可以看到控制台输出

<!DOCTYPE html>

<html lang="zh-cn">

<head>

<meta charset="utf-8"/>

<meta name="viewport" content="width=device-width, initial-scale=1" />

<meta name="referrer" content="origin" />

<title>shawWey - 博客园</title>

<link type="text/css" rel="stylesheet" href="/bundles/blog-common.css?v=giTNza-Of-PEt5UsELhFQAR7G6-bfaSa4oolcq7i9-o1"/>

<link id="MainCss" type="text/css" rel="stylesheet" href="/skins/darkgreentrip/bundle-darkgreentrip.css?v=EjExWsdi8Ql8RA7Wdq4_YaeuMVhIAL6d2BSGbilapWY1"/>

<link id="mobile-style" media="only screen and (max-width: 767px)" type="text/css" rel="stylesheet" href="/skins/darkgreentrip/bundle-darkgreentrip-mobile.css?v=6NcJHqsIyaE4w19VtgFvCFahrnr2rYCTRRTdxlMDhhQ1"/>

<link title="RSS" type="application/rss+xml" rel="alternate" href="https://www.cnblogs.com/shawWey/rss"/>

<link title="RSD" type="application/rsd+xml" rel="EditURI" href="https://www.cnblogs.com/shawWey/rsd.xml"/>

<link type="application/wlwmanifest+xml" rel="wlwmanifest" href="https://www.cnblogs.com/shawWey/wlwmanifest.xml"/>

<script src="//common.cnblogs.com/scripts/jquery-2.2.0.min.js"></script>

<script type="text/javascript">var currentBlogApp = 'shawWey', cb_enable_mathjax=false;var isLogined=false;</script>

<script src="/bundles/blog-common.js?v=fobKU6DuMF7uNOMKEOEwhhLiN2dvU4IL2UfTDgUZOsY1" type="text/javascript"></script>

</head>

<body>

<a name="top"></a>

<!--done-->

<div id="home">

<div id="header">

    <div id="blogTitle">

    <a id="lnkBlogLogo" href="https://www.cnblogs.com/shawWey/"><img id="blogLogo" src="/Skins/custom/images/logo.gif" alt="返回主页" /></a>            

<!--done-->

<h1><a id="Header1_HeaderTitle" class="headermaintitle" href="https://www.cnblogs.com/shawWey/">shawWey</a></h1>

<h2>知识的搬运工~~~浪里格朗</h2>

    </div><!--end: blogTitle 博客的标题和副标题 -->

    <div id="navigator">

<ul id="navList">

<li><a id="blog_nav_sitehome" class="menu" href="https://www.cnblogs.com/">博客园</a></li>

<li><a id="blog_nav_myhome" class="menu" href="https://www.cnblogs.com/shawWey/">首页</a></li>

<li><a id="blog_nav_newpost" class="menu" rel="nofollow" href="https://i.cnblogs.com/EditPosts.aspx?opt=1">新随笔</a></li>

<li><a id="blog_nav_contact" class="menu" rel="nofollow" href="https://msg.cnblogs.com/send/shawWey">联系</a></li>

<li><a id="blog_nav_rss" class="menu" href="https://www.cnblogs.com/shawWey/rss">订阅</a>

<!--<a id="blog_nav_rss_image" class="aHeaderXML" href="https://www.cnblogs.com/shawWey/rss"><img src="//www.cnblogs.com/images/xml.gif" alt="订阅" /></a>--></li>

<li><a id="blog_nav_admin" class="menu" rel="nofollow" href="https://i.cnblogs.com/">管理</a></li>

</ul>

        <div class="blogStats">

            <div id="blog_stats">

<span id="stats_post_count">随笔 - &nbsp; </span>

<span id="stats_article_count">文章 - &nbsp; </span>

<span id="stats-comment_count">评论 - </span>

</div>

        </div><!--end: blogStats -->

    </div><!--end: navigator 博客导航栏 -->

</div><!--end: header 头部 -->

<div id="main">

    <div id="mainContent">

    <div class="forFlow">

<!--done-->

.................

可见这种请求是可以的，接下来看下，如何拼接Json参数

　　　　　　　Map<String, String> params = new HashMap<String, String>();

            params.put("apName", apName);

            params.put("apPassword", apPassword);

            params.put("srcId", srcId);

            params.put("ServiceId", ServiceId);

            params.put("sendTime", sendTime);

            params.put("content", "我是短信内容");

            params.put("calledNumber", "");

我们可以定义一个工具类进行参数的拼接

public class StringUtils {

    public static boolean isEmpty(String str) {

        return str == null || str.length() == ;

    }

    public static String builderUrlParams(Map<String, String> params){

        Set<String> keySet = params.keySet();

        List<String> keyList = new ArrayList<String>(keySet);

        Collections.sort(keyList);

        StringBuilder sb = new StringBuilder();

        for (String key : keyList) {

            String value = params.get(key);

            if (StringUtils.isEmpty(value)) {

                continue;

            }

            sb.append(key);

            sb.append("=");

            try {

                sb.append(URLEncoder.encode(params.get(key),"UTF-8"));

            } catch (UnsupportedEncodingException e) {

                e.printStackTrace();

            }

            sb.append("&");

        }

        sb.deleteCharAt(sb.length() - );

        return sb.toString();

    }

}

完整的实例代码如下：

            String postUrl ="postUrl我短信url";

            String apName = "apName";

            String apPassword = "apPassword";

            String srcId = "";

            String ServiceId = "";

            String sendTime = "";

            Map<String, String> params = new HashMap<String, String>();

            params.put("apName", apName);

            params.put("apPassword", apPassword);

            params.put("srcId", srcId);

            params.put("ServiceId", ServiceId);

            params.put("sendTime", sendTime);

            params.put("content", "我是短信内容");

            params.put("calledNumber", "");

            try {

                String param = StringUtils.builderUrlParams(params);

                HttpResponse response = HttpUtils.sendPost(postUrl, param, Charset.forName("utf-8"));

                String conent= response.getContext();

                int statusCode = response.getResponseStatus();

                if (statusCode == ) {

                   //业务判断

                } else {

                    throw new IllegalStateException("返回HTTP状态码错误！httpStatus=" + statusCode + "; context=" + conent);

                }

            } catch (Exception e) {

                e.printStackTrace();

            }

结束!

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②HttpURLConnection通过Json参数方式提交Post请求

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