如何使用java-sdk 进行API 测试？

火山引擎提供了统一的鉴权方式进行API请求，各产品的请求鉴权方式是相同的。本文介绍如何使用python-sdk 提供的签名方法，进行测试。

java-sdk Github地址

maven 引入java-sdk

<dependency>
    <groupId>com.volcengine</groupId>
    <artifactId>volc-sdk-java</artifactId>
    <version>最新版本</version>
</dependency>
```
`
# GET 示例代码
```java

import com.sun.javafx.fxml.builder.URLBuilder;
import com.volcengine.auth.ISignerV4;
import com.volcengine.auth.impl.SignerV4Impl;
import com.volcengine.model.Credentials;
import com.volcengine.model.RequestParam;
import com.volcengine.model.SignRequest;
import com.volcengine.service.SignableRequest;
import org.apache.http.NameValuePair;
import org.apache.http.client.utils.URIBuilder;

import java.util.List;

public class SignDemo {

    public static  void main(String[] args){
        SignerV4Impl signerV4 =  new SignerV4Impl();

        SignableRequest signableRequest = new SignableRequest();
        Credentials credentials = new Credentials();
        credentials.setAccessKeyID("ak");
        credentials.setSecretAccessKey("sk==");
        credentials.setRegion("cn-beijing");
        credentials.setService("ecs");

        URIBuilder uRiBuilder = new URIBuilder();
        uRiBuilder.setScheme("https");
        uRiBuilder.setHost("open.volcengineapi.com");
        uRiBuilder.addParameter("Action","DescribeInstances");
        uRiBuilder.addParameter("Version","2020-04-01");
        uRiBuilder.addParameter("InstanceName","ECS-nfc8");
        uRiBuilder.setPath("/");

        System.out.println(uRiBuilder.toString());
        signableRequest.setMethod("GET");
        signableRequest.setUriBuilder(uRiBuilder);


        try {
        //发起http 请求即可，可使用自身项目中的httpclient
        System.out.println("https://open.volcengineapi.com/?"+signerV4.signUrl(signableRequest,credentials));
        }catch (Exception e){
            e.printStackTrace();
        }

    }

}
```

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