使用 Java SDK 从共享镜像库创建 Linux 虚拟机，自定义镜像。
```java
virtualMachine = azure.virtualMachines()
					    .define(linuxVMName)
					    .withRegion(location)
					    .withExistingResourceGroup(resourceGroup)
					    .withExistingPrimaryNetworkInterface(networkInterface)
					    .withLinuxCustomImage(customImageUrl)
					    .withRootUsername(username)
					    .withRootPassword(password)
					    .withCustomData(custDatastring)
					    .withComputerName(linuxVMName)
					    .withExistingStorageAccount(storageAccount)
					    .withSize(vmSize())
					    .create();

#!/bin/bash
echo "This is some text" > randomtext.txt

"osProfile": {
    "computerName": "xxxx",
    "adminUsername": "xxx",
    "adminPassword": "xxx",
    "customData": "IyEvYmluL2Jhc2gKIGVjaG8gIlRoaXMgaXMgc29tZSB0ZXh0IiA+IHJhbmRvbXRleHQudHh0",
    "linuxConfiguration": {
        "disablePasswordAuthentication": false
    }
}

"osProfile": {
    "computerName": "xxxx",
    "adminUsername": "xxxx",
    "linuxConfiguration": {
        "disablePasswordAuthentication": false,
        "provisionVMAgent": true
    },
    "secrets": [],
    "allowExtensionOperations": true,
    "requireGuestProvisionSignal": true
}

<details>
<summary>英文:</summary>
I am creating a linux vm using a custom image from an shared image gallery using java sdk.

How to pass a linux shell script here in the withCustomData part. I know the input for the method is Base64 encoded string.
I am trying to pass an example script

p.s: I can't create a file for the script here, i have to pass the above command directly to the api. That is my requirement.
How should i handle the customdata part here. Any help is appreciated.
vm create request osprofile json

response os profile

The image i use here is a custom linux image built on centos 8
</details>
# 答案1
**得分**: 1
请参考[Java 8基本Base64][1]，您可以使用`java.util.Base64`。首先，像平常一样导入它：
```java
import java.util.Base64;

String originalInput = "#!/bin/bash\n echo \"This is some text\" > randomtext.txt";
String encodedString = Base64.getEncoder().encodeToString(originalInput.getBytes());

virtualMachine = azure.virtualMachines()
                    .define(linuxVMName)
                    .withRegion(location)
                    .withExistingResourceGroup(resourceGroup)
                    .withExistingPrimaryNetworkInterface(networkInterface)
                    .withLinuxCustomImage(customImageUrl)
                    .withRootUsername(username)
                    .withRootPassword(password)
                    .withCustomData(encodedString)
                    .withComputerName(linuxVMName)
                    .withExistingStorageAccount(storageAccount)
                    .withSize(vmSize())
                    .create();