如何编写与Azure REST API返回JSON对应的Java POJO/Entity类

Got it, let's build the POJO classes that map perfectly to your Azure REST API JSON response. We'll use Jackson (the go-to library for JSON processing in most Java apps, especially Spring-based ones) to handle serialization/deserialization. Here's how to do it step by step:

1. Add Jackson Dependency (if you haven't already) #

If you're using Maven, add this to your pom.xml:

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.15.2</version> <!-- Use the latest stable version -->
</dependency>

2. Define the POJO Classes #

We'll break down the JSON structure into nested classes matching each object:

a. Top-Level Response Class #

This wraps the "value" array of storage accounts:

import com.fasterxml.jackson.annotation.JsonProperty;
import java.util.List;

public class StorageAccountsResponse {
    @JsonProperty("value")
    private List<StorageAccount> storageAccounts;

    // Getters and Setters
    public List<StorageAccount> getStorageAccounts() {
        return storageAccounts;
    }

    public void setStorageAccounts(List<StorageAccount> storageAccounts) {
        this.storageAccounts = storageAccounts;
    }
}

b. StorageAccount Class #

Represents each item in the "value" array:

import com.fasterxml.jackson.annotation.JsonProperty;
import java.util.Map;

public class StorageAccount {
    @JsonProperty("sku")
    private Sku sku;

    @JsonProperty("kind")
    private String kind;

    @JsonProperty("id")
    private String id;

    @JsonProperty("name")
    private String name;

    @JsonProperty("type")
    private String type;

    @JsonProperty("location")
    private String location;

    @JsonProperty("tags")
    private Map<String, String> tags;

    @JsonProperty("properties")
    private StorageAccountProperties properties;

    // Getters and Setters for all fields
    public Sku getSku() {
        return sku;
    }

    public void setSku(Sku sku) {
        this.sku = sku;
    }

    public String getKind() {
        return kind;
    }

    public void setKind(String kind) {
        this.kind = kind;
    }

    // ... Add remaining getters and setters (your IDE can auto-generate these!)
}

c. Sku Class #

Maps the "sku" object in each storage account:

import com.fasterxml.jackson.annotation.JsonProperty;

public class Sku {
    @JsonProperty("name")
    private String name;

    @JsonProperty("tier")
    private String tier;

    // Getters and Setters
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getTier() {
        return tier;
    }

    public void setTier(String tier) {
        this.tier = tier;
    }
}

d. StorageAccountProperties Class #

Handles the "properties" object, including the networkAcls (we'll define a placeholder class for it since you have ... in your JSON):

import com.fasterxml.jackson.annotation.JsonProperty;

public class StorageAccountProperties {
    @JsonProperty("networkAcls")
    private NetworkAcls networkAcls;

    // Getters and Setters
    public NetworkAcls getNetworkAcls() {
        return networkAcls;
    }

    public void setNetworkAcls(NetworkAcls networkAcls) {
        this.networkAcls = networkAcls;
    }
}

e. NetworkAcls Class (Placeholder) #

Expand this with the actual fields from your full networkAcls JSON once you have it:

// Add fields that match your actual networkAcls structure here
public class NetworkAcls {
    // Example fields (adjust based on your full JSON):
    // private String defaultAction;
    // private List<IpRule> ipRules;

    // Getters and Setters for your specific fields
}

3. Deserialize the JSON Response #

Once you have the POJOs, use Jackson's ObjectMapper to convert the API response string into your Java objects:

import com.fasterxml.jackson.databind.ObjectMapper;

public class AzureApiClient {
    public static void main(String[] args) throws Exception {
        String jsonResponse = "{ \"value\": [ { \"sku\": { \"name\": \"Standard_LRS\", \"tier\": \"Standard\" }, \"kind\": \"Storage\", \"id\": \"/subscriptions/cc60365e-3193-xxxx-b0f6-xxxxxxx/resourceGroups/WebServer-ubuntu/providers/Microsoft.Storage/storageAccounts/webserverubuntudiagxxx\", \"name\": \"webserverubuntudiag4xx\", \"type\": \"Microsoft.Storage/storageAccounts\", \"location\": \"eastus\", \"tags\": {}, \"properties\": { \"networkAcls\": {} } } ] }";

        ObjectMapper objectMapper = new ObjectMapper();
        StorageAccountsResponse response = objectMapper.readValue(jsonResponse, StorageAccountsResponse.class);

        // Access the first storage account
        StorageAccount firstAccount = response.getStorageAccounts().get(0);
        System.out.println("Storage Account Name: " + firstAccount.getName());
        System.out.println("SKU Name: " + firstAccount.getSku().getName());
    }
}

Quick Notes #

• If you prefer Gson over Jackson, replace @JsonProperty with @SerializedName from the Gson library.
• Don't forget to generate all missing getters/setters—most IDEs (IntelliJ, Eclipse) can do this in one click.
• Update the NetworkAcls class with real fields once you have the complete networkAcls JSON structure from the API.

内容的提问来源于stack exchange，提问作者Deepak S