public void setBucketPrivate (BosClient client, String bucketName) {
    client.setBucketAcl(<bucketName>, CannedAccessControlList.Private);
}

List<Grant> accessControlList = new ArrayList<Grant>();
List<Grantee> grantees = new ArrayList<Grantee>();
List<Permission> permissions = new ArrayList<Permission>();
List<String> ipAddress = new ArrayList<String>();
List<String> stringLike = new ArrayList<String>();
List<String> stringEquals = new ArrayList<String>();
List<String> resource = new ArrayList<String>();
List<String> notResource = new ArrayList<String>();
Referer referer = new Referer();
Condition condition = new Condition();

// 授权给特定用户
grantees.add(new Grantee("user_id1"));
grantees.add(new Grantee("user_id2"));
grantees.add(new Grantee("user_id3"));

//授权给Everyone
grantees.add(new Grantee("*"));


//设置权限
permissions.add(Permission.WRITE);
permissions.add(Permission.READ);
permissions.add(Permission.LIST);

// 设置ip
ipAddress.add("ipAddress1");
ipAddress.add("ipAddress2");
ipAddress.add("ipAddress3");
condition.setIpAddress(ipAddress);

//设置 refer stringLike
stringLike.add("http://www.example1.com/");
stringLike.add("http://www.example2.com/");
stringLike.add("http://www.example3.com/");
referer.setStringLike(stringLike);
condition.setReferer(referer);

// 设置 refer stringEquals
stringEquals.add("http://www.baidu.com");
stringEquals.add("http://www.xiaomi.com");
stringEquals.add("http://www.google.com");
referer.setStringEquals(stringEquals);
condition.setReferer(referer);

// 设置 resource
resource.add("yourBucketName");


//设置notResource
List<String> notResouce = new ArrayList<String>();
notResouce.add("yourBucketName");
notResouce.add("yourBucketName/*");

Grant grant = new Grant();

grant.setGrantee(grantees);
grant.setPermission(permissions);
grant.setCondition(condition);
grant.setResource(resource);

List<Grantee> grantees1 = new ArrayList<Grantee>();
List<Permission> permissions1 = new ArrayList<Permission>();
List<String> ipAddress1 = new ArrayList<String>();
List<String> stringLike1 = new ArrayList<String>();
List<String> stringEquals1 = new ArrayList<String>();
List<String> resource1 = new ArrayList<String>();
List<String> notResource1 = new ArrayList<String>();
Referer referer1 = new Referer();
Condition condition1 = new Condition();

// 授权给特定用户
grantees1.add(new Grantee("user_id4"));
grantees1.add(new Grantee("user_id5"));
grantees1.add(new Grantee("user_id6"));

//授权给Everyone
grantees.add(new Grantee("*"));

//设置权限
permissions.add(Permission.FULL_CONTROL);
permissions1.add(Permission.WRITE);
permissions1.add(Permission.READ);
permissions1.add(Permission.LIST);

// 设置ip
ipAddress1.add("ipAddress4");
ipAddress1.add("ipAddress5");
ipAddress1.add("ipAddress6");
condition1.setIpAddress(ipAddress1);

//设置 refer stringLike
stringLike1.add("http://www.example4.com/");
stringLike1.add("http://www.example5.com/");
stringLike1.add("http://www.example6.com/");
referer1.setStringLike(stringLike1);
condition1.setReferer(referer1);

// 设置 refer stringEquals
stringEquals1.add("http://www.baidu1.com");
stringEquals1.add("http://www.xiaomi1.com");
stringEquals1.add("http://www.google1.com");
referer1.setStringEquals(stringEquals1);
condition1.setReferer(referer1);

// 设置 resource
resource1.add("yourBucketName");

// 设置notResource
List<String> notResouce = new ArrayList<String>();
notResouce.add("yourBucketName");
notResouce.add("yourBucketName/*");

Grant grant1 = new Grant();

grant1.setGrantee(grantees1);
grant1.setPermission(permissions1);
grant1.setCondition(condition1);
grant1.setResource(resource1);

accessControlList.add(grant);
accessControlList.add(grant1);

SetBucketAclRequest request = new SetBucketAclRequest("yourBucketName",accessControlList);
client.setBucketAcl(request);

String jsonAcl = "";
client.setBucketAcl("bucketName", jsonAcl)

String jsonAcl = "";
client.setBucketAcl("bucketName", jsonAcl)

GetBucketAclResponse aclResponse = client.getBucketAcl("bucketName");
System.out.println(aclResponse.getAccessControlList().toString());