diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/ApiClient.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/ApiClient.mustache
index 95fb8093bc3b..68caafe2daca 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/ApiClient.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/ApiClient.mustache
@@ -73,6 +73,7 @@ public class ApiClient {
   protected String tempFolderPath = null;
 
   protected Map<String, Authentication> authentications;
+  protected Map<String, String> authenticationLookup;
 
   protected DateFormat dateFormat;
 
@@ -93,6 +94,10 @@ public class ApiClient {
     authentications.put("{{name}}", new OAuth());{{/isOAuth}}{{/authMethods}}
     // Prevent the authentications from being modified.
     authentications = Collections.unmodifiableMap(authentications);
+
+    // Setup authentication lookup (key: authentication alias, value: authentication name)
+    authenticationLookup = new HashMap<String, String>();{{#authMethods}}{{#vendorExtensions.x-auth-id-alias}}
+    authenticationLookup.put("{{name}}", "{{.}}");{{/vendorExtensions.x-auth-id-alias}}{{/authMethods}}
   }
 
   /**
@@ -181,6 +186,25 @@ public class ApiClient {
     throw new RuntimeException("No API key authentication configured!");
   }
 
+  /**
+   * Helper method to configure authentications which respects aliases of API keys.
+   *
+   * @param secrets Hash map from authentication name to its secret.
+   */
+  public void configureApiKeys(HashMap<String, String> secrets) {
+    for (Map.Entry<String, Authentication> authEntry : authentications.entrySet()) {
+      Authentication auth = authEntry.getValue();
+      if (auth instanceof ApiKeyAuth) {
+        String name = authEntry.getKey();
+        // respect x-auth-id-alias property
+        name = authenticationLookup.getOrDefault(name, name);
+        if (secrets.containsKey(name)) {
+          ((ApiKeyAuth) auth).setApiKey(secrets.get(name));
+        }
+      }
+    }
+  }
+
   /**
    * Helper method to set API key prefix for the first API key authentication.
    * @param apiKeyPrefix API key prefix
diff --git a/samples/client/petstore/java/jersey2-java6/src/main/java/org/openapitools/client/ApiClient.java b/samples/client/petstore/java/jersey2-java6/src/main/java/org/openapitools/client/ApiClient.java
index 35d6ae5c9af9..b3bd35faa449 100644
--- a/samples/client/petstore/java/jersey2-java6/src/main/java/org/openapitools/client/ApiClient.java
+++ b/samples/client/petstore/java/jersey2-java6/src/main/java/org/openapitools/client/ApiClient.java
@@ -64,6 +64,7 @@ public class ApiClient {
   protected String tempFolderPath = null;
 
   protected Map<String, Authentication> authentications;
+  protected Map<String, String> authenticationLookup;
 
   protected DateFormat dateFormat;
 
@@ -84,6 +85,9 @@ public ApiClient() {
     authentications.put("petstore_auth", new OAuth());
     // Prevent the authentications from being modified.
     authentications = Collections.unmodifiableMap(authentications);
+
+    // Setup authentication lookup (key: authentication alias, value: authentication name)
+    authenticationLookup = new HashMap<String, String>();
   }
 
   /**
@@ -172,6 +176,25 @@ public void setApiKey(String apiKey) {
     throw new RuntimeException("No API key authentication configured!");
   }
 
+  /**
+   * Helper method to configure authentications which respects aliases of API keys.
+   *
+   * @param secrets Hash map from authentication name to its secret.
+   */
+  public void configureApiKeys(HashMap<String, String> secrets) {
+    for (Map.Entry<String, Authentication> authEntry : authentications.entrySet()) {
+      Authentication auth = authEntry.getValue();
+      if (auth instanceof ApiKeyAuth) {
+        String name = authEntry.getKey();
+        // respect x-auth-id-alias property
+        name = authenticationLookup.getOrDefault(name, name);
+        if (secrets.containsKey(name)) {
+          ((ApiKeyAuth) auth).setApiKey(secrets.get(name));
+        }
+      }
+    }
+  }
+
   /**
    * Helper method to set API key prefix for the first API key authentication.
    * @param apiKeyPrefix API key prefix
diff --git a/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/ApiClient.java b/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/ApiClient.java
index dcc41e43f5d0..e75d20c92635 100644
--- a/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/ApiClient.java
+++ b/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/ApiClient.java
@@ -65,6 +65,7 @@ public class ApiClient {
   protected String tempFolderPath = null;
 
   protected Map<String, Authentication> authentications;
+  protected Map<String, String> authenticationLookup;
 
   protected DateFormat dateFormat;
 
@@ -85,6 +86,9 @@ public ApiClient() {
     authentications.put("petstore_auth", new OAuth());
     // Prevent the authentications from being modified.
     authentications = Collections.unmodifiableMap(authentications);
+
+    // Setup authentication lookup (key: authentication alias, value: authentication name)
+    authenticationLookup = new HashMap<String, String>();
   }
 
   /**
@@ -173,6 +177,25 @@ public void setApiKey(String apiKey) {
     throw new RuntimeException("No API key authentication configured!");
   }
 
+  /**
+   * Helper method to configure authentications which respects aliases of API keys.
+   *
+   * @param secrets Hash map from authentication name to its secret.
+   */
+  public void configureApiKeys(HashMap<String, String> secrets) {
+    for (Map.Entry<String, Authentication> authEntry : authentications.entrySet()) {
+      Authentication auth = authEntry.getValue();
+      if (auth instanceof ApiKeyAuth) {
+        String name = authEntry.getKey();
+        // respect x-auth-id-alias property
+        name = authenticationLookup.getOrDefault(name, name);
+        if (secrets.containsKey(name)) {
+          ((ApiKeyAuth) auth).setApiKey(secrets.get(name));
+        }
+      }
+    }
+  }
+
   /**
    * Helper method to set API key prefix for the first API key authentication.
    * @param apiKeyPrefix API key prefix
diff --git a/samples/client/petstore/java/jersey2/src/main/java/org/openapitools/client/ApiClient.java b/samples/client/petstore/java/jersey2/src/main/java/org/openapitools/client/ApiClient.java
index dcc41e43f5d0..e75d20c92635 100644
--- a/samples/client/petstore/java/jersey2/src/main/java/org/openapitools/client/ApiClient.java
+++ b/samples/client/petstore/java/jersey2/src/main/java/org/openapitools/client/ApiClient.java
@@ -65,6 +65,7 @@ public class ApiClient {
   protected String tempFolderPath = null;
 
   protected Map<String, Authentication> authentications;
+  protected Map<String, String> authenticationLookup;
 
   protected DateFormat dateFormat;
 
@@ -85,6 +86,9 @@ public ApiClient() {
     authentications.put("petstore_auth", new OAuth());
     // Prevent the authentications from being modified.
     authentications = Collections.unmodifiableMap(authentications);
+
+    // Setup authentication lookup (key: authentication alias, value: authentication name)
+    authenticationLookup = new HashMap<String, String>();
   }
 
   /**
@@ -173,6 +177,25 @@ public void setApiKey(String apiKey) {
     throw new RuntimeException("No API key authentication configured!");
   }
 
+  /**
+   * Helper method to configure authentications which respects aliases of API keys.
+   *
+   * @param secrets Hash map from authentication name to its secret.
+   */
+  public void configureApiKeys(HashMap<String, String> secrets) {
+    for (Map.Entry<String, Authentication> authEntry : authentications.entrySet()) {
+      Authentication auth = authEntry.getValue();
+      if (auth instanceof ApiKeyAuth) {
+        String name = authEntry.getKey();
+        // respect x-auth-id-alias property
+        name = authenticationLookup.getOrDefault(name, name);
+        if (secrets.containsKey(name)) {
+          ((ApiKeyAuth) auth).setApiKey(secrets.get(name));
+        }
+      }
+    }
+  }
+
   /**
    * Helper method to set API key prefix for the first API key authentication.
    * @param apiKeyPrefix API key prefix