基于JAVA的汇率换算接口调用代码实例

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;

/**

*汇率调用示例代码 － 聚合数据

*在线接口文档：http://www.juhe.cn/docs/80

**/

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.常用汇率查询

public static void getRequest1(){

String result =null;

String url ="http://op.juhe.cn/onebox/exchange/query";//请求接口地址

Map params = new HashMap();//请求参数

params.put("key",APPKEY);//应用APPKEY(应用详细页查询)

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.货币列表

public static void getRequest2(){

String result =null;

String url ="http://op.juhe.cn/onebox/exchange/list";//请求接口地址

Map params = new HashMap();//请求参数

params.put("key",APPKEY);//应用APPKEY(应用详细页查询)

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.实时汇率查询换算

public static void getRequest3(){

String result =null;

String url ="http://op.juhe.cn/onebox/exchange/currency";//请求接口地址

Map params = new HashMap();//请求参数

params.put("from","");//转换汇率前的货币代码

params.put("to","");//转换汇率成的货币代码

params.put("key",APPKEY);//应用APPKEY(应用详细页查询)

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(Mapdata) {

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();

}

}