java獲取匯率 美元-人民幣
阿新 • • 發佈:2019-02-07
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.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import org.json.JSONObject;
/**
*匯率呼叫示例程式碼 - 聚合資料
*線上介面文件:http://www.juhe.cn/docs/80
**/
public class MoneyChangeUtils {
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";
/**
* 請求美元和人民幣匯率
* @return
*/
public static String getRequest3(){
String result =null;
String url ="http://data.bank.hexun.com/other/cms/fxjhjson.ashx?callback=PereMoreData";//請求介面地址
Map params = new HashMap();//請求引數
try {
result =net(url, params, "GET");
if(result.contains("USD")){
//改成json解析更好
int base = result.indexOf("[");
int end = result.indexOf("]");
String alldata = result.substring(base + 1, end );
String rate = "";
String[] currencys = alldata.split(",");
for(int i = 0; i <currencys.length; i++){
if(currencys[i].contains("USD") || currencys[i].contains("usd")){
rate = currencys[i - 1];
break;
}
}
base = rate.indexOf("'");
end = rate.lastIndexOf("'");
float res = Float.parseFloat(rate.substring(base + 1,end))/100;
System.out.println(res);
return String.valueOf(res);
}
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
/**
* 獲取每個月一號的日期格式
* @return
*/
public static String getMoneyBaseDate(){
DateFormat fmtDateTime = new SimpleDateFormat("YYYYMMdd");
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date());
calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), 1);
String res = fmtDateTime.format(calendar.getTime());
System.out.println(res);
return res;
}
/**
*
* @param strUrl 請求地址
* @param params 請求引數
* @param method 請求方法
* @return 網路請求字串
* @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;
}
//將map型轉為請求引數型
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();
}
}