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README
Apache-2.0

简介

欢迎使用腾讯云开发者工具套件(SDK)3.0,SDK3.0是云 API3.0 平台的配套工具。 为方便 JAVA 开发者调试和接入腾讯云产品 API,这里向您介绍适用于 Java 的腾讯云开发工具包,并提供首次使用开发工具包的简单示例。让您快速获取腾讯云 Java SDK 并开始调用。

依赖环境

  1. 依赖环境:JDK 7 版本及以上。
  2. 从 腾讯云控制台 开通相应产品。
  3. 获取 SecretID、SecretKey 以及调用地址(endpoint),endpoint 一般形式为*.tencentcloudapi.com,如CVM 的调用地址为 cvm.tencentcloudapi.com,具体参考各产品说明。

获取安装

安装 Java SDK 前,先获取安全凭证。在第一次使用云API之前,用户首先需要在腾讯云控制台上申请安全凭证,安全凭证包括 SecretID 和 SecretKey,SecretID 是用于标识 API 调用者的身份,SecretKey 是用于加密签名字符串和服务器端验证签名字符串的密钥 SecretKey 必须严格保管,避免泄露。您也可以前往从零开始使用腾讯云 Java SDK 界面查看更为基础和详细的 Java SDK 的安装和使用说明。

通过 Maven 安装(推荐)

从 3.1.500 版本开始,本项目使用 KonaJDK 编译发布。

通过 Maven 获取安装是使用 JAVA SDK 的推荐方法,Maven 是 JAVA 的依赖管理工具,支持您项目所需的依赖项,并将其安装到项目中。关于 Maven 详细可参考 Maven 官网。

  1. 请访问Maven官网下载对应系统Maven安装包进行安装;
  2. 为您的项目添加 Maven 依赖项,只需在 Maven pom.xml 添加以下依赖项即可。注意这里的版本号只是举例,您可以在Maven仓库上找到最新的版本(最新版本是3.1.708)。请知悉,SDK 是先确认 mvn deploy 发布成功后再更新 GitHub tag,但是 Maven 官网索引更新有延迟,导致新发布的版本暂时(约1-2小时)在 Maven 官网搜索不到,实际不影响使用最新版本,您可以正常执行 mvn compile 等指令。
  3. maven仓库中显示的4.0.11是废弃版本,我们已经联系maven官方删除jar包,但maven索引无法清除,请勿使用;
  4. 引用方法可参考示例。
<dependency>
    <groupId>com.tencentcloudapi</groupId>
    <artifactId>tencentcloud-sdk-java</artifactId>
    <!-- go to https://search.maven.org/search?q=tencentcloud-sdk-java and get the latest version. -->
    <!-- 请到https://search.maven.org/search?q=tencentcloud-sdk-java查询所有版本,最新版本如下 -->
    <version>3.1.899</version>
</dependency>
  1. 如上引用方式会将腾讯云所有产品sdk下载到本地,可以将artifactId换成tencentcloud-sdk-java-cvm/cbs/vpc等,即可引用特定产品的sdk,代码中使用方式和大包相同,可参考示例。最新版本也可在Maven仓库查询,可大大节省存储空间。
  2. 中国大陆地区的用户可以使用镜像源加速下载,编辑 maven 的 settings.xml 配置文件,在 mirrors 段落增加镜像配置:
    <mirror>
      <id>tencent</id>
      <name>tencent maven mirror</name>
      <url>https://mirrors.tencent.com/nexus/repository/maven-public/</url>
      <mirrorOf>*</mirrorOf>
    </mirror>

通过源码包安装

  1. 前往 Github 仓库 或者 Gitee 仓库 下载源码压缩包;
  2. 解压源码包到您项目合适的位置;
  3. 需要将vendor目录下的jar包放在java的可找到的路径中;
  4. 引用方法可参考示例。

示例

以查询实例接口DescribeInstances为例:

简化版

import com.tencentcloudapi.common.Credential;
import com.tencentcloudapi.common.exception.TencentCloudSDKException;
import com.tencentcloudapi.cvm.v20170312.CvmClient;
import com.tencentcloudapi.cvm.v20170312.models.DescribeInstancesRequest;
import com.tencentcloudapi.cvm.v20170312.models.DescribeInstancesResponse;

public class DescribeInstances {
    public static void main(String[] args) {
        try {
            // 为了保护密钥安全,建议将密钥设置在环境变量中或者配置文件中,请参考本文凭证管理章节。
            // 硬编码密钥到代码中有可能随代码泄露而暴露,有安全隐患,并不推荐。
            // Credential cred = new Credential("SecretId", "SecretKey");
            Credential cred = new Credential(System.getenv("TENCENTCLOUD_SECRET_ID"), System.getenv("TENCENTCLOUD_SECRET_KEY"));
            CvmClient client = new CvmClient(cred, "ap-shanghai");

            DescribeInstancesRequest req = new DescribeInstancesRequest();
            DescribeInstancesResponse resp = client.DescribeInstances(req);

            System.out.println(DescribeInstancesResponse.toJsonString(resp));
        } catch (TencentCloudSDKException e) {
            System.out.println(e.toString());
        }
    }
}

详细版

import com.tencentcloudapi.common.Credential;
import com.tencentcloudapi.common.exception.TencentCloudSDKException;
// 导入对应产品模块的client
import com.tencentcloudapi.cvm.v20170312.CvmClient;
// 导入要请求接口对应的request response类
import com.tencentcloudapi.cvm.v20170312.models.DescribeInstancesRequest;
import com.tencentcloudapi.cvm.v20170312.models.DescribeInstancesResponse;
import com.tencentcloudapi.cvm.v20170312.models.Filter;
//导入可选配置类
import com.tencentcloudapi.common.profile.ClientProfile;
import com.tencentcloudapi.common.profile.HttpProfile;
import com.tencentcloudapi.common.profile.Language;

public class DescribeInstances {
    public static void main(String[] args) {
        try {
            // 实例化一个认证对象,入参需要传入腾讯云账户 SecretId,SecretKey。
            // 为了保护密钥安全,建议将密钥设置在环境变量中或者配置文件中,请参考本文凭证管理章节。
            // 硬编码密钥到代码中有可能随代码泄露而暴露,有安全隐患,并不推荐。
            // Credential cred = new Credential("SecretId", "SecretKey");
            Credential cred = new Credential(System.getenv("TENCENTCLOUD_SECRET_ID"), System.getenv("TENCENTCLOUD_SECRET_KEY"));

            // 实例化一个http选项,可选的,没有特殊需求可以跳过
            HttpProfile httpProfile = new HttpProfile();
            // 从3.0.96版本开始, 单独设置 HTTP 代理
            // httpProfile.setProxyHost("真实代理ip");
            // httpProfile.setProxyPort(真实代理端口);
            httpProfile.setReqMethod("GET"); // get请求(默认为post请求)
            httpProfile.setConnTimeout(30); // 请求连接超时时间,单位为秒(默认60秒)
            httpProfile.setWriteTimeout(30);  // 设置写入超时时间,单位为秒(默认0秒)
            httpProfile.setReadTimeout(30);  // 设置读取超时时间,单位为秒(默认0秒)
            httpProfile.setEndpoint("cvm.ap-shanghai.tencentcloudapi.com"); // 指定接入地域域名(默认就近接入)

            // 实例化一个client选项,可选的,没有特殊需求可以跳过
            ClientProfile clientProfile = new ClientProfile();
            clientProfile.setSignMethod("HmacSHA256"); // 指定签名算法(默认为HmacSHA256)
            // 自3.1.80版本开始,SDK 支持打印日志。
            clientProfile.setHttpProfile(httpProfile);
            clientProfile.setDebug(true);
            // 从3.1.16版本开始,支持设置公共参数 Language, 默认不传,选择(ZH_CN or EN_US)
            clientProfile.setLanguage(Language.EN_US);
            // 实例化要请求产品(以cvm为例)的client对象,clientProfile是可选的
            CvmClient client = new CvmClient(cred, "ap-shanghai", clientProfile);

            // 实例化一个cvm实例信息查询请求对象,每个接口都会对应一个request对象。
            DescribeInstancesRequest req = new DescribeInstancesRequest();

            // 填充请求参数,这里request对象的成员变量即对应接口的入参
            // 您可以通过官网接口文档或跳转到request对象的定义处查看请求参数的定义
            Filter respFilter = new Filter(); // 创建Filter对象, 以zone的维度来查询cvm实例
            respFilter.setName("zone");
            respFilter.setValues(new String[] { "ap-shanghai-1", "ap-shanghai-2" });
            req.setFilters(new Filter[] { respFilter }); // Filters 是成员为Filter对象的列表

            // 通过client对象调用DescribeInstances方法发起请求。注意请求方法名与请求对象是对应的
            // 返回的resp是一个DescribeInstancesResponse类的实例,与请求对象对应
            DescribeInstancesResponse resp = client.DescribeInstances(req);

            // 输出json格式的字符串回包
            System.out.println(DescribeInstancesResponse.toJsonString(resp));

            // 也可以取出单个值。
            // 您可以通过官网接口文档或跳转到response对象的定义处查看返回字段的定义
            System.out.println(resp.getTotalCount());
        } catch (TencentCloudSDKException e) {
            System.out.println(e.toString());
        }
    }
}

详细版示例代码分步骤介绍

  1. 导入待调用的类
import com.tencentcloudapi.common.Credential;
import com.tencentcloudapi.common.exception.TencentCloudSDKException;
// 导入对应产品模块的client
import com.tencentcloudapi.cvm.v20170312.CvmClient;
// 导入要请求接口对应的request response类
import com.tencentcloudapi.cvm.v20170312.models.DescribeInstancesRequest;
import com.tencentcloudapi.cvm.v20170312.models.DescribeInstancesResponse;
import com.tencentcloudapi.cvm.v20170312.models.Filter;
//导入可选配置类
import com.tencentcloudapi.common.profile.ClientProfile;
import com.tencentcloudapi.common.profile.HttpProfile;
import com.tencentcloudapi.common.profile.Language;
  1. 实例化一个认证对象cred,入参需要传入腾讯云账户密钥 secretId,secretKey, 前往 API 密钥管理 页面,即可进行获取密钥。此处还需注意密钥对的保密。
// 为了保护密钥安全,建议将密钥设置在环境变量中或者配置文件中,请参考本文凭证管理章节。
// 硬编码密钥到代码中有可能随代码泄露而暴露,有安全隐患,并不推荐。
Credential cred = new Credential(System.getenv("TENCENTCLOUD_SECRET_ID"), System.getenv("TENCENTCLOUD_SECRET_KEY"));
  1. 实例化一个http选项,若没有特殊需求可参照简化版示例代码跳过设置。若有需求可以参照下方示例代码设置http选项中的参数。
HttpProfile httpProfile = new HttpProfile();
//  从3.1.16版本开始, 单独设置 HTTP 代理
// httpProfile.setProxyHost("真实代理ip");
// httpProfile.setProxyPort(真实代理端口);
// get请求(默认为post请求)
httpProfile.setReqMethod("GET"); // get请求(默认为post请求)
httpProfile.setProtocol("https://");  // 合法值:https:// 或者 http:// ,公有云只能使用 https。
httpProfile.setConnTimeout(30); // 请求连接超时时间,单位为秒(默认60秒)
httpProfile.setWriteTimeout(30);  // 设置写入超时时间,单位为秒(默认0秒)
httpProfile.setReadTimeout(30);  // 设置读取超时时间,单位为秒(默认0秒)
httpProfile.setEndpoint("cvm.ap-shanghai.tencentcloudapi.com"); // 指定接入地域域名(默认就近接入)
  1. 实例化一个client选项,若没有特殊需求可参照简化版示例代码跳过设置。若有需求可以参照下方示例代码设置client选项中的参数。
ClientProfile clientProfile = new ClientProfile();
clientProfile.setSignMethod("HmacSHA256"); // 指定签名算法(默认为HmacSHA256)
// 自3.1.80版本开始,SDK 支持打印日志。
clientProfile.setHttpProfile(httpProfile);
clientProfile.setDebug(true);
// 从3.1.16版本开始,支持设置公共参数 Language, 默认不传,选择(ZH_CN or EN_US)
clientProfile.setLanguage(Language.EN_US);
  1. 实例化要请求产品的client对象,示例代码以cvm产品为例,实例化CvmClient对象。
CvmClient client = new CvmClient(cred, "ap-shanghai", clientProfile);
  1. 实例化一个cvm实例信息查询请求对象req,每个接口都会对应一个request对象,若有需要可以参照官网文档设置对象中的参数。
DescribeInstancesRequest req = new DescribeInstancesRequest();
// 填充请求参数,这里request对象的成员变量即对应接口的入参
// 您可以通过官网接口文档或跳转到request对象的定义处查看请求参数的定义
Filter respFilter = new Filter(); // 创建Filter对象, 以zone的维度来查询cvm实例
respFilter.setName("zone");
respFilter.setValues(new String[] { "ap-shanghai-1", "ap-shanghai-2" });
req.setFilters(new Filter[] { respFilter }); // Filters 是成员为Filter对象的列表
  1. 通过client对象调用您想调用的接口,返回对应的Response类的实例
// 通过client对象调用DescribeInstances方法发起请求。注意请求方法名与请求对象是对应的
// 返回的resp是一个DescribeInstancesResponse类的实例,与请求对象对应
DescribeInstancesResponse resp = client.DescribeInstances(req);
  1. 可以打印输出返回的数据值。
// 输出json格式的字符串回包
System.out.println(DescribeInstancesResponse.toJsonString(resp));
// 也可以取出单个值。
// 您可以通过官网接口文档或跳转到response对象的定义处查看返回字段的定义
System.out.println(resp.getTotalCount());
} 
  1. 使用catch处理报错,错误码详细内容请参考官网产品文档对应的错误码章节。
catch (TencentCloudSDKException e) {
    System.out.println(e.toString());
}

更多示例

您可以在github中examples目录下找到更多详细的示例。

相关配置

代理

从3.0.96版本开始,可以单独设置 HTTP 代理:

HttpProfile httpProfile = new HttpProfile();
httpProfile.setProxyHost("代理ip或者域名");
httpProfile.setProxyPort(代理端口);
httpProfile.setProxyUsername("代理用户名");
httpProfile.setProxyPassword("代理密码");

语言

从3.1.16版本开始,我们添加了对公共参数 Language 的支持,以满足部分产品国际化的诉求。和以前一样,Language 默认不传,行为由各产品接口自行决定,通常是中文的,但也有默认英文的。目前可选值为中文或者英文,通过如下方法设置:

import com.tencentcloudapi.common.profile.ClientProfile;
import com.tencentcloudapi.common.profile.Language;
...
    ClientProfile clientProfile = new ClientProfile();
    clientProfile.setLanguage(Language.ZH_CN);

支持http

SDK支持 http协议和https协议,通过设置HttpProfile的setProtocol()方法可以实现协议间的切换:

      HttpProfile httpProfile = new HttpProfile();
      httpProfile.setProtocol("http://"); //http协议
      httpProfile.setProtocol("https://"); //https协议

支持打印日志

自3.1.80版本开始,SDK 支持打印日志。 首先,在创建 CLientProfile 对象时,设置 debug 模式为真,会打印sdk异常信息和流量信息

      ClientProfile clientProfile = new ClientProfile();
      clientProfile.setDebug(true);

腾讯云java sdk 使用commons.logging类进行打印日志,如下所示。

九月 10, 2020 5:14:30 下午 com.tencentcloudapi.cvm.v20170312.CvmClient info
信息: send request, request url: https://cvm.ap-shanghai.tencentcloudapi.com/?Nonce=367595572&Action=DescribeInstances&Filters.0.Values.1=ap-shanghai-2&Version=2017-03-12&Filters.0.Values.0=ap-shanghai-1&SecretId=AKIDziAMHwiVO0LPCizu61e1iCQP7YiaOX7Q&Filters.0.Name=zone&RequestClient=SDK_JAVA_3.1.129&Region=ap-shanghai&SignatureMethod=HmacSHA256&Timestamp=1599729270&Signature=DcGRPdquMZZRPj1NFXP5bsOGnRlaT2KXy7aegNhZa00%3D. request headers information: 
九月 10, 2020 5:14:32 下午 com.tencentcloudapi.cvm.v20170312.CvmClient info
信息: recieve response, response url: https://cvm.ap-shanghai.tencentcloudapi.com/?Nonce=367595572&Action=DescribeInstances&Filters.0.Values.1=ap-shanghai-2&Version=2017-03-12&Filters.0.Values.0=ap-shanghai-1&SecretId=AKIDziAMHwiVO0LPCizu61e1iCQP7YiaOX7Q&Filters.0.Name=zone&RequestClient=SDK_JAVA_3.1.129&Region=ap-shanghai&SignatureMethod=HmacSHA256&Timestamp=1599729270&Signature=DcGRPdquMZZRPj1NFXP5bsOGnRlaT2KXy7aegNhZa00%3D, response headers: Server: nginx;Date: Thu, 10 Sep 2020 09:14:32 GMT;Content-Type: application/json;Content-Length: 103;Connection: keep-alive;OkHttp-Selected-Protocol: http/1.1;OkHttp-Sent-Millis: 1599729271230;OkHttp-Received-Millis: 1599729272020;,response body information: com.squareup.okhttp.internal.http.RealResponseBody@8646db9

用户可以根据自己的需要配置日志打印类,如log4j 配置方法如下:

  • 配置pom文件,设置log4j版本。
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
    </dependency>
  • 设置环境变量为log4j, 并创建log类
System.setProperty("org.apache.commons.logging.Log", "org.apache.commons.logging.impl.Log4JLogger");
Log logger = LogFactory.getLog("TestLog");
logger.info("hello world");

地域容灾

3.1.779开始,腾讯云 JAVA SDK 支持地域容灾功能:

默认当请求满足以下条件时:

  1. 失败次数 >= 5 次
  2. 失败率 >= 75%

SDK 会自动将您请求的地域设置为备选地域。

相关设置如下:

    // 设置备用请求地址,不需要指定服务,SDK 会自动在头部加上服务名(如cvm)
    // 例如,设置为 ap-guangzhou.tencentcloudapi.com,则最终的请求为 cvm.ap-guangzhou.tencentcloudapi.com
    clientProfile.setBackupEndpoint("ap-guangzhou.tencentcloudapi.com");

    // 自定义断路器条件
    CircuitBreaker.Setting setting = new CircuitBreaker.Setting();
    setting.maxFailNum = 6;
    setting.maxFailPercentage = 0.8f;
    CircuitBreaker rb = new CircuitBreaker(setting);
    client.setRegionBreaker(rb);

此功能仅支持单个客户端的同步请求。

Common Client

从 3.1.303 版本开始腾讯云 Java SDK 支持使用泛用性的 API 调用方式(Common Client)进行请求。您只需要安装 Common 包,即可向任何产品发起调用。

注意,您必须明确知道您调用的接口所需参数,否则可能会调用失败。

目前仅支持使用POST方式,且签名方法必须使用签名方法 v3。

详细使用请参阅示例:使用 Common Client 进行调用

支持重试请求

从 3.1.310 版本开始腾讯云 Java SDK 支持重试请求。对于每一个请求,您可以设置重试次数,如果接口请求未成功,就进行重试,直到请求成功或者达到重试次数为止。待设置的重试次数最大为10,最小为0,每次重试失败需要睡眠1秒钟。

详细使用请参阅示例:使用 retry 进行重试请求

凭证管理

腾讯云 Java SDK 目前支持以下几种方式进行凭证管理:

  1. 环境变量

默认读取环境变量 TENCENTCLOUD_SECRET_IDTENCENTCLOUD_SECRET_KEY 获取 secretId 和 secretKey。相关代码如下:

Credential cred = new EnvironmentVariableCredentialsProvider().getCredentials();
  1. 配置文件

配置文件路径要求为:

  • Windows: c:\Users\NAME\.tencentcloud\credentials
  • Linux: ~/.tencentcloud/credentials/etc/tencentcloud/credentials

配置文件格式如下:

[default]
secret_id = xxxxx
secret_key = xxxxx

相关代码如下:

Credential cred = new ProfileCredentialsProvider().getCredentials();
  1. 角色扮演

有关角色扮演的相关概念请参阅:腾讯云角色概述

要使用此种方式,您必须在腾讯云访问管理控制台上创建了一个角色,具体创建过程请参阅:腾讯云角色创建

在您拥有角色后,可以通过持久密钥和 roleArn 获取临时凭证,SDK 会自动刷新临时凭证,相关代码如下:

Credential cred = new STSCredential("secretId", "secretKey", "roleArn", "roleSessionName");
  1. 实例角色

有关实例角色的相关概念请参阅:腾讯云实例角色

在您为实例绑定角色后,您可以在实例中访问相关元数据接口获取临时凭证,SDK 会自动刷新临时凭证。相关代码如下:

Credential cred = new CvmRoleCredential();
  1. TKE OIDC凭证

有关 TKE OIDC 凭证的相关示例请参阅:Pod 使用 CAM 对数据库身份验证

OIDCRoleArnProvider provider = new OIDCRoleArnProvider();
Credential credential = provider.getCredentials();

6.凭证提供链

腾讯云 Java SDK 提供了凭证提供链,它会默认以环境变量->配置文件->实例角色->TKE OIDC凭证的顺序尝试获取凭证,并返回第一个获取到的凭证。相关代码如下:

Credential cred = new DefaultCredentialsProvider().getCredentials();

凭证管理详细使用请参阅示例:使用凭证提供链

自定义 SSLSocketFactory 和 X509TrustManager

ClientProfile cpf = new ClientProfile();
cpf.getHttpProfile().setSslSocketFactory(new MySSLSocketFactoryImpl());
cpf.getHttpProfile().setX509TrustManager(new MyX509TrustManagerImpl());

自定义 Header

DescribeInstancesRequest示例

ClientProfile cpf = new ClientProfile();
// 自定义 Header 需要使用 v3 签名方式
cpf.setSignMethod(ClientProfile.SIGN_TC3_256);

DescribeInstancesRequest request = new DescribeInstancesRequest();
Map<String, String> header = new HashMap<String, String>();
header.put("X-TC-TraceId","ffe0c072-8a5d-4e17-8887-a8a60252abca");
request.SetHeader(header);

CommonClientRequest示例

ClientProfile cpf = new ClientProfile();
// 自定义 Header 需要使用 v3 签名方式
cpf.setSignMethod(ClientProfile.SIGN_TC3_256);

CommonClientRequest request = new CommonClientRequest();
Map<String, String> header = new HashMap<String, String>();
header.put("X-TC-TraceId","ffe0c072-8a5d-4e17-8887-a8a60252abca");
request.SetHeader(header);

其他问题

版本升级

请注意,从 3.0.x 版本升级到 3.1.x 版本有兼容性问题,对于 Integer 字段的使用修改为了 Long 类型,需要重新编译项目。

证书问题

证书问题通常是客户端环境配置错误导致的。SDK 没有对证书进行操作,依赖的是 Java 运行环境本身的处理。出现证书问题后,可以使用-Djavax.net.debug=ssl开启详细日志辅助判断。

有用户报告使用 IBM JDK 1.8 出现证书报错:javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure,使用 Oracle JDK 后问题消失。

kotlin 问题

部分用户可能使用时遇到报错:java.lang.NoSuchMethodError: kotlin.collections.ArraysKt.copyInto。这是因为 kotlin 运行环境版本较低导致,可尝试升级 kotlin 版本解决。

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