1.在阿里云控制台-访问控制中创建读写权限策略

https://help.aliyun.com/document_detail/31935.html?spm=5176.doc32069.2.4.AxKPsA%EF%BC%89

新建自定义策略

权限策略格式

{
    "Version": "1",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "oss:DeleteObject",
                "oss:ListParts",
                "oss:AbortMultipartUpload",
                "oss:PutObject",
                "oss:GetObject"
            ],
            "Resource": [
                "acs:oss:*:*:YourBucketName",
                "acs:oss:*:*:YourBucketName/*"
            ]
        }
    ]
}

2.创建角色

新建RAM角色

3.为新增的角色添加自定义权限策略

获取到ARN

4.创建子账号

获取到AccessKeyID和AccessKeySecret

为该用户添加调用STS服务AssumeRole接口的权限

5.服务端调用

添加依赖

<dependency>
    <groupId>com.aliyun</groupId>
    <artifactId>aliyun-java-sdk-sts</artifactId>
    <version>3.0.0</version>
</dependency>
<dependency>
    <groupId>com.aliyun</groupId>
    <artifactId>aliyun-java-sdk-core</artifactId>
    <version>3.5.0</version>
</dependency>

赋予角色方法

/**
     * 赋予角色
     *
     * @param accessKeyId
     * @param accessKeySecret
     * @param roleArn
     * @param roleSessionName
     * @param policy
     * @param seconds
     * @param protocolType
     * @return
     * @author 欧解决
     * @date 2018-12-17 17:32:18
     **/
    public AssumeRoleResponse assumeRole(
            String regionId,
            String accessKeyId,
            String accessKeySecret,
            String roleArn,
            String roleSessionName,
            String policy,
            Long seconds) {
        try {
            // 创建一个 Aliyun Acs Client, 用于发起 OpenAPI 请求
            IClientProfile profile = DefaultProfile.getProfile(regionId, accessKeyId, accessKeySecret);
            DefaultAcsClient client = new DefaultAcsClient(profile);
            // 创建一个 AssumeRoleRequest 并设置请求参数
            final AssumeRoleRequest request = new AssumeRoleRequest();
            //POST请求
            request.setMethod(MethodType.POST);
            //https协议
            request.setProtocol(ProtocolType.HTTPS);
            //持续时间
            request.setDurationSeconds(seconds);
            //角色id
            request.setRoleArn(roleArn);
            //应用程序标识(自己定义)
            request.setRoleSessionName(roleSessionName);
            //在赋予角色的同时,还赋予其他的权限策略
            request.setPolicy(policy);
            // 发起请求，并得到response
            final AssumeRoleResponse response = client.getAcsResponse(request);
            return response;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

Controller调用

　　@Autowired　　private OSSProperties ossProperties;　　@Autowired　　private StsService stsService;

　　/**
     * 签名授权
     *
     * @return
     * @author 欧解决
     * @date 2018-12-17 15:08:55
     **/
    @GetMapping("/getOssToken")
    public Object getOssToken() {
            AssumeRoleResponse response = stsService.assumeRole(
                    ossProperties.getRegionId(),
                    ossProperties.getAccessKey(),
                    ossProperties.getAccessSecret(),
                    ossProperties.getRoleArn(),
                    "my-session-name",
                    null,
                    3600L
            );
            if (response != null) {
                return new BaseTRo<>(response.getCredentials());
            }
            return new BaseRo(SystemError.ProcessMsg, "OssToken获取失败");
    }

接口返回数据

{
    "code": "0",
    "msg": "",
    "data": {
        "securityToken": "CAIS7gF1q6Ft5B2yfSjIr4vaMc+F2Ilz+7ahTH+IgXgFfuQY3LzdtTz2IHxJfHBhBusev/4+mGlT5/8ZlqNzVplUWEqBZNNxtn6HNrUyJ9ivgde8yJBZor/HcDHhJnyW9cvWZPqDP7G5U/yxalfCuzZuyL/hD1uLVECkNpv74vwOLK5gPG+CYCFBGc1dKyZ7tcYeLgGxD/u2NQPwiWeiZygB+CgE0DMvs/rknJPAs0KE1QalltV4/dqhfsKWCOB3J4p6XtuP2+h7S7HMyiY46WIRqPou1f0bom+W5IDBWgIAuk6cXurJ48BpPNnK5EGq9GovGoABfy0gMkLTYW4gEzdc5wxcZNWl/orL/DmvymDIWe1M/u/JUDpA3NfQTTnxG9xSxTz4lwPeEG9LgoYZzXuDTtmRcl/wQetvjDU7PBC1urYMNtVlyaST3jGfa+WU0zAW57zOBqeBejxui9AE1JCOcg2CDA/u5Mz2Hu79Ci7UTJ0eusw=",
        "accessKeySecret": "FAA1KeGnmMEWjYHaKuL5WP5NSeVVFor7hMHd4VBQ7Uaa",
        "accessKeyId": "STS.NHozu15VRLuJNY9exPrk13yvW",
        "expiration": "2018-12-17T11:52:38Z"
    }
}

原文地址：https://www.cnblogs.com/ou11/p/10133217.html