httpClient Post 加号会被转换为空格

在调试接口时，服务器采用tomcat，ssm架构，post发送数据时遇到一个问题，参数中加号会被转换为空格，

这个主要是url编码协议导致的，关于传输的特殊字符可以参考这篇博客 http://blog.csdn.net/scyatcs/article/details/26766437
记录一下自己解决这个问题的2个方法：

一种是利用 NameValuePair 将数据以键值对的形式中间用&分隔发送到服务端，此时在发送前需要进行urlEncoded编码，代码如下：

           HttpClient httpclient = new DefaultHttpClient();            

              HttpPost httpPost = new HttpPost(uri);

              HttpMessage msg = new HttpMessage(map);

              httpPost.setEntity(new UrlEncodedFormEntity(msg.toList()));

  第二种就是以JSONObject的形式发送

           httpPost.setHeader("Content-Type", "application/json;charset=UTF-8");

           StringEntity s = new StringEntity(msg.getJsonString());    

           s.setContentEncoding("UTF-8");    

           s.setContentType("application/json");    

           httpPost.setEntity(s);  

           HttpResponse response = httpclient.execute(httpPost);

public class HttpMessage {

    private HashMap<String,Object> map;

    public HttpMessage(HashMap<String,Object> map)

    {

        this.map=map;

    }

    // post 数据 参数以 & 连接

    public List<NameValuePair> toList(){

        List <NameValuePair> nvps = new ArrayList<NameValuePair>();

        if(map != null && !map.isEmpty()){

         for(Map.Entry<String, Object> entry : map.entrySet()){

            nvps.add(new BasicNameValuePair(entry.getKey(), String.valueOf(entry.getValue())));

         }

        }

        return nvps;

    }

   

 // post 数据 参数 JSON格式

    public String getJsonString() throws JSONException{

     JSONObject jsonStr = new JSONObject();

        if(map != null && !map.isEmpty()){

         for(Map.Entry<String, Object> entry : map.entrySet()){

          jsonStr.put(entry.getKey(), String.valueOf(entry.getValue()));

         }

        }

        return jsonStr.toString();

    }

}