一、Httpclient发送json请求

public String RequestJsonPost(String url){

    String strresponse = null;

    try{

        HttpClient hc = new DefaultHttpClient();

       HttpPost hp = new HttpPost(url);

       JSONObject jsonParam = new JSONObject();

       jsonParam.put("user","admin");

       jsonParam.put("password", "123456");

       //设置数据为utf-8编码

       StringEntity entity = new StringEntity(jsonParam.toString(),"utf-8");

       //设置请求编码

       entity.setContentEncoding("utf-8");

       //设置请求类型

       entity.setContentType("application/json");

       hp.setEntity(entity);

       //请求并得到结果

       HttpResponse result = hc.execute(hp);

       strresponse = EntityUtils.toString(result.getEntity(),"utf-8").trim();

    }catch(Exception e){

       e.printStackTrace();

}

return strresponse;

}