基于JAVA的黄金数据接口调用代码实例

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import java.io.BufferedReader; import java.io.DataOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLEncoder; import java.util.HashMap; import java.util.Map;    import net.sf.json.JSONObject;    /** *黄金数据调用示例代码 － 聚合数据 *在线接口文档：http://www.juhe.cn/docs/29 **/    public class JuheDemo {      public static final String DEF_CHATSET = "UTF-8" ;      public static final int DEF_CONN_TIMEOUT = 30000 ;      public static final int DEF_READ_TIMEOUT = 30000 ;      public static String userAgent =  "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36" ;         //配置您申请的KEY      public static final String APPKEY = "*************************" ;         //1.上海黄金交易所      public static void getRequest1(){          String result = null ;          String url = "http://web.juhe.cn:8080/finance/gold/shgold" ;//请求接口地址          Map params = new HashMap(); //请求参数              params.put( "key" ,APPKEY); //APP Key              params.put( "v" , "" ); //JSON格式版本(0或1)默认为0             try {              result =net(url, params, "GET" );              JSONObject object = JSONObject.fromObject(result);              if (object.getInt( "error_code" )== 0 ){                  System.out.println(object.get( "result" ));              } else {                  System.out.println(object.get( "error_code" )+ ":" +object.get( "reason" ));              }          } catch (Exception e) {              e.printStackTrace();          }      }         //2.上海期货交易所      public static void getRequest2(){          String result = null ;          String url = "http://web.juhe.cn:8080/finance/gold/shfuture" ;//请求接口地址          Map params = new HashMap(); //请求参数              params.put( "key" ,APPKEY); //APP Key              params.put( "v" , "" ); //JSON格式版本(0或1)默认为0             try {              result =net(url, params, "GET" );              JSONObject object = JSONObject.fromObject(result);              if (object.getInt( "error_code" )== 0 ){                  System.out.println(object.get( "result" ));              } else {                  System.out.println(object.get( "error_code" )+ ":" +object.get( "reason" ));              }          } catch (Exception e) {              e.printStackTrace();          }      }         //3.银行账户黄金      public static void getRequest3(){          String result = null ;          String url = "http://web.juhe.cn:8080/finance/gold/bankgold" ;//请求接口地址          Map params = new HashMap(); //请求参数              params.put( "key" ,APPKEY); //APP Key             try {              result =net(url, params, "GET" );              JSONObject object = JSONObject.fromObject(result);              if (object.getInt( "error_code" )== 0 ){                  System.out.println(object.get( "result" ));              } else {                  System.out.println(object.get( "error_code" )+ ":" +object.get( "reason" ));              }          } catch (Exception e) {              e.printStackTrace();          }      }               public static void main(String[] args) {         }         /**       *       * @param strUrl 请求地址       * @param params 请求参数       * @param method 请求方法       * @return  网络请求字符串       * @throws Exception       */      public static String net(String strUrl, Map params,String method) throws Exception {          HttpURLConnection conn = null ;          BufferedReader reader = null ;          String rs = null ;          try {              StringBuffer sb = new StringBuffer();              if (method== null || method.equals( "GET" )){                  strUrl = strUrl+ "?" +urlencode(params);              }              URL url = new URL(strUrl);              conn = (HttpURLConnection) url.openConnection();              if (method== null || method.equals( "GET" )){                  conn.setRequestMethod( "GET" );              } else {                  conn.setRequestMethod( "POST" );                  conn.setDoOutput( true );              }              conn.setRequestProperty( "User-agent" , userAgent);              conn.setUseCaches( false );              conn.setConnectTimeout(DEF_CONN_TIMEOUT);              conn.setReadTimeout(DEF_READ_TIMEOUT);              conn.setInstanceFollowRedirects( false );              conn.connect();              if (params!= null && method.equals( "POST" )) {                  try {                      DataOutputStream out = new DataOutputStream(conn.getOutputStream());                          out.writeBytes(urlencode(params));                  } catch (Exception e) {                      // TODO: handle exception                  }              }              InputStream is = conn.getInputStream();              reader = new BufferedReader( new InputStreamReader(is, DEF_CHATSET));              String strRead = null ;              while ((strRead = reader.readLine()) != null ) {                  sb.append(strRead);              }              rs = sb.toString();          } catch (IOException e) {              e.printStackTrace();          } finally {              if (reader != null ) {                  reader.close();              }              if (conn != null ) {                  conn.disconnect();              }          }          return rs;      }         //将map型转为请求参数型      public static String urlencode(Map<String,Object>data) {          StringBuilder sb = new StringBuilder();          for (Map.Entry i : data.entrySet()) {              try {                  sb.append(i.getKey()).append( "=" ).append(URLEncoder.encode(i.getValue()+ "" , "UTF-8" )).append( "&" );              } catch (UnsupportedEncodingException e) {                  e.printStackTrace();              }          }          return sb.toString();      } ｝