java实时获取汇率

墨蓝 2021-11-23 11:44 862阅读 0赞

1.分享三个觉得挺不错的汇率api：

1) 每小时免费50次查询配额：[NOWapi][]

2) 0.1元2000次/年：[阿里云 汇率api][_api]

3) 每天免费100次查询配额(需要实名认证)：[聚合科技][Link 1]

如果只是针对很少外币获取汇率的话，个人推荐去阿里云购买，毕竟1元不到就可以查询非常多次了。

2.以下的总结以通过**阿里云的汇率api**获取实时汇率为准。

3.首先，这个是 [汇率Api使用文档][Api]。

4.目前官网通过Java来调用api的测试方法如下：

import com.bastriver.common.util.HttpUtils;
    import org.apache.http.HttpResponse;
    import org.apache.http.util.EntityUtils;
    
    import java.util.HashMap;
    import java.util.Map;
    
    public class test {
    
        public static void main(String[] args) {
            String host = "https://ali-waihui.showapi.com";
            String path = "/waihui-transform";
            String method = "GET";
            String appcode = "***********";
            Map<String, String> headers = new HashMap<String, String>();
            //最后在header中的格式(中间是英文空格)为Authorization:APPCODE 83359fd73fe94948385f570e3c139105
            headers.put("Authorization", "APPCODE " + appcode);
            Map<String, String> querys = new HashMap<String, String>();
            querys.put("fromCode", "CNY");
            querys.put("money", "100");
            querys.put("toCode", "JPY");
    
    // https://market.aliyun.com/products/57000002/cmapi010841.html?spm=5176.2020520132.101.2.32087218XQPbLW#sku=yuncode484100003
            try {
                /**
                 * 重要提示如下:
                 * HttpUtils请从
                 * https://github.com/aliyun/api-gateway-demo-sign-java/blob/master/src/main/java/com/aliyun/api/gateway/demo/util/HttpUtils.java
                 * 下载
                 *
                 * 相应的依赖请参照
                 * https://github.com/aliyun/api-gateway-demo-sign-java/blob/master/pom.xml
                 */
                HttpResponse response = HttpUtils.doGet(host, path, method, headers, querys);
                System.out.println(response.toString());
                //获取response的body
                System.out.println(EntityUtils.toString(response.getEntity()));
                /*{
                    "showapi_res_error": "",
                        "showapi_res_id": "f72eb3ff9c494d4e90343ac4c36dbf1b",
                        "showapi_res_code": 0,
                        "showapi_res_body": {"ret_code":0,"money":"1585.0875"} //转换后的金额，单位元
                }*/
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    
    }

5.因为使用到阿里的工具，所以先添加pom：

<dependency>
    			<groupId>org.apache.httpcomponents</groupId>
    			<artifactId>httpclient</artifactId>
    			<version>4.2.1</version>
    		</dependency>
    		<dependency>
    			<groupId>org.apache.httpcomponents</groupId>
    			<artifactId>httpcore</artifactId>
    			<version>4.2.1</version>
    		</dependency>
    		<dependency>
    			<groupId>commons-lang</groupId>
    			<artifactId>commons-lang</artifactId>
    			<version>2.6</version>
    		</dependency>

然后是HttpUtils.java：[HttpUtils][]

测试方法的配置：

![20190727151350539.png][]

比如，例子中的是通过人民币的100元可以兑换日币1585.0875，测试结果如图：

![20190727151432982.png][]

[NOWapi]: https://www.nowapi.com/api/finance.rate
[_api]: https://market.aliyun.com/products/57000002/cmapi010841.html?spm=5176.78296.785986.8.733e5d76mu87mp#sku=yuncode484100003
[Link 1]: https://www.juhe.cn/docs/api/id/23?
[Api]: https://market.aliyun.com/products/57000002/cmapi010841.html?spm=5176.2020520132.101.2.32087218XQPbLW#sku=yuncode484100003
[HttpUtils]: https://github.com/aliyun/api-gateway-demo-sign-java/blob/master/src/main/java/com/aliyun/api/gateway/demo/util/HttpUtils.java
[20190727151350539.png]: /images/20211122/130049b99cc1445083ae57fca259d18a.png
[20190727151432982.png]: /images/20211122/2f903dcfbbc0449981eff6bc16ded034.png