不幸的是，现在还没有一个适用于Firebase REST界面的Java SDK ）。相反，您需要使用您选择的HTTP客户端创建一个。

以下是使用Jersey的示例：

  import javax.ws.rs.core.MediaType; 
 import com.sun.jersey.api.client.Client; 
 import com.sun.jersey.api.client.ClientHandlerException; 
 import com.sun.jersey.api.client.UniformInterfaceException; 
 import com.vnomicscorp.firebase.sdk.FirebaseSdk; 
 import com.vnomicscorp.firebase.sdk.FirebaseSdkException; 

 public class FirebaseSdkJersey {

 private static final String DEFAULT_AUTH_PARAM_NAME =auth; 
 private static final String DEFAULT_PATH_FORMAT =％s.json; 

 private final String凭证; 
 private final String url; 
私人最终客户端客户端; 

 private String authParamName = DEFAULT_AUTH_PARAM_NAME; 
 private String pathFormat = DEFAULT_PATH_FORMAT; 

 public FirebaseSdkJersey（String url，String credentials，Client client）{
 this.url = url; 
 this.credentials = credentials; 
 this.client = client; 


 public void setValue（String path，String value）throws Exception {
 client.resource（url）.path（String.format（pathFormat，path））
 .queryParam（authParamName，credentials）
 .type（MediaType.APPLICATION_JSON）.entity（value）
 .put（String.class）; 

 $ b $ public String getValue（String path）throws Exception {
 return client.resource（url）.path（String.format（pathFormat，path））
 .queryParam（authParamName，credentials）.get（String.class）; 

 $ b $ public void deleteValue（String path）throws Exception {
 client.resource（url）.path（String.format（pathFormat，path））
。 queryParam（authParamName，credentials）.delete（String.class）; 




 $ p $需要以下依赖关系

 < dependency> 
< groupId> com.sun.jersey< / groupId> 
< artifactId>球衣客户端< / artifactId> 
< version> 1.19< / version> 
< /依赖> 
 
结构如下：


 客户端客户端= Client.create（）; 
 sdk = new FirebaseSdkJersey（url，credentials，client）; 
 
 

其中 url 是Firebase网址和 credentials 是在管理控制台中生成的密钥。
 
I need to be able to update some data to firebase without setting firebase to online so only the specified data gets sent while no wifi is available.  I have been unable to find any documents or guides on how to use the REST API in Java.  Can someone help me with it?

Unfortunately there isn't an existing Java SDK for Firebase REST interface (that I could find). Instead you'll need to make one using your HTTP client of choice.

Here's an example using Jersey:
import javax.ws.rs.core.MediaType;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientHandlerException;
import com.sun.jersey.api.client.UniformInterfaceException;
import com.vnomicscorp.firebase.sdk.FirebaseSdk;
import com.vnomicscorp.firebase.sdk.FirebaseSdkException;

public class FirebaseSdkJersey {

    private static final String DEFAULT_AUTH_PARAM_NAME = "auth";
    private static final String DEFAULT_PATH_FORMAT = "%s.json";

    private final String credentials;
    private final String url;
    private final Client client;

    private String authParamName = DEFAULT_AUTH_PARAM_NAME;
    private String pathFormat = DEFAULT_PATH_FORMAT;

    public FirebaseSdkJersey(String url, String credentials, Client client) {
        this.url = url;
        this.credentials = credentials;
        this.client = client;
    }

    public void setValue(String path, String value) throws Exception {
        client.resource(url).path(String.format(pathFormat, path))
                    .queryParam(authParamName, credentials)
                    .type(MediaType.APPLICATION_JSON).entity(value)
                    .put(String.class);
    }

    public String getValue(String path) throws Exception {
        return client.resource(url).path(String.format(pathFormat, path))
                .queryParam(authParamName, credentials).get(String.class);
    }

    public void deleteValue(String path) throws Exception {
        client.resource(url).path(String.format(pathFormat, path))
                .queryParam(authParamName, credentials).delete(String.class);
    }
}

Needs the following dependencies
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-client</artifactId>
        <version>1.19</version>
    </dependency>

Construction looks like this:
    Client client = Client.create();
    sdk = new FirebaseSdkJersey(url, credentials, client);

Where url is the Firebase url and credentials is a secret key generated in the admin console.