JSONP

HttpClientUtils.java

package com.sf.util;import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.PrintWriter;import java.net.HttpURLConnection;import java.net.URL;import java.util.HashMap;import java.util.List;import java.util.Map;import org.springframework.util.StringUtils;import org.springframework.web.bind.annotation.RequestMethod;import com.alibaba.fastjson.JSONObject;/** * @ClassName: HttpClientUtils * <li>文件名称: HttpClientUtils.java</li>* <li>公　　司: 北京赛福阔利特科技有限公司</li>* <li>版权所有: 版权所有(C)2015-2020</li>* <li>修改记录: ...</li>* <li>内容摘要:  Http请求工具类</li>* <li>其他说明: ...</li>* @version  v1.0* @author ZhangJunfeng* @date 2016年6月21日 下午3:14:40  */public class HttpClientUtils{public static Object sendPostRequest(String urlStr){return sendRequest(urlStr, RequestMethod.POST, null);}public static Object sendGetRequest(String urlStr){return sendRequest(urlStr, RequestMethod.GET, null);}public static Object sendPostRequest(String urlStr,Map<String, Object> parameters){return sendRequest(urlStr, RequestMethod.POST, parameters);}public static Object sendGetRequest(String urlStr,Map<String, Object> parameters){return sendRequest(urlStr, RequestMethod.GET, parameters);}/** * @Title: sendRequest * @Description: 发送请求，接收返回值 * @param urlStr 请求URL* @param method 请求方式 POST、GET* @param parameters 请求参数* @return    设定文件 * @return String    返回类型 * @throws */public static Object sendRequest(String urlStr,RequestMethod method,Map<String, Object> parameters){try {URL url = new URL(urlStr);HttpURLConnection con = (HttpURLConnection)url.openConnection();if(method.equals(RequestMethod.POST)){con.setDoOutput(true); }con.setDoInput(true);con.setRequestMethod(method.name()); con.setUseCaches(false);con.setInstanceFollowRedirects(true); con.setRequestProperty("accept", "*/*");con.setRequestProperty("Connection", "Keep-Alive");con.setRequestProperty("Content-Type","application/x-www-form-urlencoded; charset=UTF-8"); con.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Safari/537.36");con.setConnectTimeout(30 * 1000);con.setReadTimeout(10*1000);con.connect();if(method.equals(RequestMethod.POST)){StringBuffer requestParameters = new StringBuffer();if(parameters!=null && parameters.size()>0){for (Map.Entry<String, Object> param : parameters.entrySet()) {requestParameters.append("&").append(param.getKey()).append("=").append(param.getValue());}}String paramStr = requestParameters.toString();if(!StringUtils.isEmpty(paramStr)){PrintWriter out = new PrintWriter(con.getOutputStream());out = new PrintWriter(con.getOutputStream());paramStr = paramStr.substring(1);out.print(paramStr);out.flush();out.close();}}BufferedReader reader = null;if(con.getResponseCode()==HttpURLConnection.HTTP_OK || con.getResponseCode()==HttpURLConnection.HTTP_CREATED || con.getResponseCode()==HttpURLConnection.HTTP_ACCEPTED){reader  = new BufferedReader(new InputStreamReader(con.getInputStream(),"utf-8"),5*1024*1024);}else{reader = new BufferedReader(new InputStreamReader(con.getErrorStream(),"utf-8"),5*1024*1024);}String requestStr= ""; if(reader!=null){String line;while ((line=reader.readLine())!=null) {requestStr+=line;}}reader.close();con.disconnect();if(requestStr.startsWith("[")){return JSONObject.parseObject(requestStr,List.class);}else if(requestStr.startsWith("{")){return JSONObject.parseObject(requestStr,Map.class);}else{return requestStr;}} catch (Exception e) {System.out.println("发送 POST 请求出现异常！"+e);            e.printStackTrace();            return null;}}public static void main(String[] args) {Map<String, Object> mapp = new HashMap<String, Object>();        mapp.put("deviceCode","00-50-56-C0-00-01");        mapp.put("account","admin");        mapp.put("pwd","admin");Object result =sendPostRequest("http://127.0.0.1:8081/app/bflink/auth",mapp);System.out.println(result);//Map<String, Object> mapp = new HashMap<String, Object>();//mapp.put("workorders","{bfid:\"asdfasdfasdasdf\",cdate:1467951147057,description:\"test\",swpcode:\"1060\",weights:1}");//Object resultStr = sendPostRequest("http://192.168.0.100:8081/app/bflink/bfwp/140gm9hASjd4fY6dEl%252F2KWWu%252ButGt9%252B2Y6Lte1VPkUnGxsxK%252B6MmElPKPkwfgBa6951yQWzLnWw%253D",mapp);//System.out.println(resultStr);}}

springmvc    ---jsonp接口

 @RequestMapping(value = "/pj/testky")      @ResponseBody      public String text2(HttpServletRequest request, HttpServletResponse response,String contentType2,String callback){          String content = null;          Map map = new HashMap();          Map<String, Object> parameters = new HashMap<String, Object>();      parameters.put("name", "sarin");     Object o=HttpClientUtils.sendRequest("http://app.lituoxy.com:8091/api/tdprj_6373/trainpos",RequestMethod.GET,parameters);        map.put("data", o);          content=getJsonP(map, callback);          return content;        }        public static String getJsonP(Map map,String callback)      {          ObjectMapper mapper = new ObjectMapper();          String content = null;          try {              content = mapper.writeValueAsString(map);          } catch (JsonGenerationException e) {              e.printStackTrace();          } catch (JsonMappingException e) {              e.printStackTrace();          } catch (IOException e) {              e.printStackTrace();          }          if("".equals(callback)){              return content;          }          return callback+"("+content+")";      }