diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/ApiClient.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/ApiClient.mustache
index c95f206588d..261ace14f6f 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/ApiClient.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/ApiClient.mustache
@@ -62,6 +62,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TimeZone;
+import java.util.function.Supplier;
 {{#jsr310}}
 import java.time.OffsetDateTime;
 {{/jsr310}}
@@ -192,9 +193,18 @@ public class ApiClient{{#jsr310}} extends JavaTimeFormatter{{/jsr310}} {
      * @param bearerToken the token
      */
     public void setBearerToken(String bearerToken) {
+        setBearerToken(() -> bearerToken);
+    }
+
+    /**
+     * Helper method to set the token supplier for HTTP bearer authentication.
+     *
+     * @param tokenSupplier the token supplier function
+     */
+    public void setBearerToken(Supplier<String> tokenSupplier) {
         for (Authentication auth : authentications.values()) {
             if (auth instanceof HttpBearerAuth) {
-                ((HttpBearerAuth) auth).setBearerToken(bearerToken);
+                ((HttpBearerAuth) auth).setBearerToken(tokenSupplier);
                 return;
             }
         }
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/auth/HttpBearerAuth.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/auth/HttpBearerAuth.mustache
index a0de5664179..e0924aaf8e1 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/auth/HttpBearerAuth.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/auth/HttpBearerAuth.mustache
@@ -1,27 +1,34 @@
 package {{invokerPackage}}.auth;
 
+import java.util.Optional;
+import java.util.function.Supplier;
 import org.springframework.http.HttpHeaders;
 import org.springframework.util.MultiValueMap;
 
 {{>generatedAnnotation}}
 public class HttpBearerAuth implements Authentication {
     private final String scheme;
-    private String bearerToken;
+    private Supplier<String> tokenSupplier;
 
     public HttpBearerAuth(String scheme) {
         this.scheme = scheme;
     }
 
     public String getBearerToken() {
-        return bearerToken;
+        return tokenSupplier.get();
     }
 
     public void setBearerToken(String bearerToken) {
-        this.bearerToken = bearerToken;
+        this.tokenSupplier = () -> bearerToken;
+    }
+    
+    public void setBearerToken(Supplier<String> tokenSupplier) {
+        this.tokenSupplier = tokenSupplier;
     }
 
     @Override
     public void applyToParams(MultiValueMap<String, String> queryParams, HttpHeaders headerParams, MultiValueMap<String, String> cookieParams) {
+        String bearerToken = Optional.ofNullable(tokenSupplier).map(Supplier::get).orElse(null);
         if (bearerToken == null) {
             return;
         }
diff --git a/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/ApiClient.java b/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/ApiClient.java
index 4bf570e304d..a58613e725a 100644
--- a/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/ApiClient.java
+++ b/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/ApiClient.java
@@ -51,6 +51,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TimeZone;
+import java.util.function.Supplier;
 import java.time.OffsetDateTime;
 
 import org.openapitools.client.auth.Authentication;
diff --git a/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java b/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
index b1fc73f8a73..45ef724bd64 100644
--- a/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
+++ b/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
@@ -1,27 +1,34 @@
 package org.openapitools.client.auth;
 
+import java.util.Optional;
+import java.util.function.Supplier;
 import org.springframework.http.HttpHeaders;
 import org.springframework.util.MultiValueMap;
 
 @jakarta.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HttpBearerAuth implements Authentication {
     private final String scheme;
-    private String bearerToken;
+    private Supplier<String> tokenSupplier;
 
     public HttpBearerAuth(String scheme) {
         this.scheme = scheme;
     }
 
     public String getBearerToken() {
-        return bearerToken;
+        return tokenSupplier.get();
     }
 
     public void setBearerToken(String bearerToken) {
-        this.bearerToken = bearerToken;
+        this.tokenSupplier = () -> bearerToken;
+    }
+    
+    public void setBearerToken(Supplier<String> tokenSupplier) {
+        this.tokenSupplier = tokenSupplier;
     }
 
     @Override
     public void applyToParams(MultiValueMap<String, String> queryParams, HttpHeaders headerParams, MultiValueMap<String, String> cookieParams) {
+        String bearerToken = Optional.ofNullable(tokenSupplier).map(Supplier::get).orElse(null);
         if (bearerToken == null) {
             return;
         }
diff --git a/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/ApiClient.java b/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/ApiClient.java
index ff30ce83e36..cfa530eaca2 100644
--- a/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/ApiClient.java
+++ b/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/ApiClient.java
@@ -51,6 +51,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TimeZone;
+import java.util.function.Supplier;
 import java.time.OffsetDateTime;
 
 import org.openapitools.client.auth.Authentication;
diff --git a/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java b/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
index c11aa74e474..51d5e3278ef 100644
--- a/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
+++ b/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
@@ -1,27 +1,34 @@
 package org.openapitools.client.auth;
 
+import java.util.Optional;
+import java.util.function.Supplier;
 import org.springframework.http.HttpHeaders;
 import org.springframework.util.MultiValueMap;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HttpBearerAuth implements Authentication {
     private final String scheme;
-    private String bearerToken;
+    private Supplier<String> tokenSupplier;
 
     public HttpBearerAuth(String scheme) {
         this.scheme = scheme;
     }
 
     public String getBearerToken() {
-        return bearerToken;
+        return tokenSupplier.get();
     }
 
     public void setBearerToken(String bearerToken) {
-        this.bearerToken = bearerToken;
+        this.tokenSupplier = () -> bearerToken;
+    }
+    
+    public void setBearerToken(Supplier<String> tokenSupplier) {
+        this.tokenSupplier = tokenSupplier;
     }
 
     @Override
     public void applyToParams(MultiValueMap<String, String> queryParams, HttpHeaders headerParams, MultiValueMap<String, String> cookieParams) {
+        String bearerToken = Optional.ofNullable(tokenSupplier).map(Supplier::get).orElse(null);
         if (bearerToken == null) {
             return;
         }
diff --git a/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/ApiClient.java b/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/ApiClient.java
index ff30ce83e36..cfa530eaca2 100644
--- a/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/ApiClient.java
+++ b/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/ApiClient.java
@@ -51,6 +51,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TimeZone;
+import java.util.function.Supplier;
 import java.time.OffsetDateTime;
 
 import org.openapitools.client.auth.Authentication;
diff --git a/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java b/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
index c11aa74e474..51d5e3278ef 100644
--- a/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
+++ b/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
@@ -1,27 +1,34 @@
 package org.openapitools.client.auth;
 
+import java.util.Optional;
+import java.util.function.Supplier;
 import org.springframework.http.HttpHeaders;
 import org.springframework.util.MultiValueMap;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HttpBearerAuth implements Authentication {
     private final String scheme;
-    private String bearerToken;
+    private Supplier<String> tokenSupplier;
 
     public HttpBearerAuth(String scheme) {
         this.scheme = scheme;
     }
 
     public String getBearerToken() {
-        return bearerToken;
+        return tokenSupplier.get();
     }
 
     public void setBearerToken(String bearerToken) {
-        this.bearerToken = bearerToken;
+        this.tokenSupplier = () -> bearerToken;
+    }
+    
+    public void setBearerToken(Supplier<String> tokenSupplier) {
+        this.tokenSupplier = tokenSupplier;
     }
 
     @Override
     public void applyToParams(MultiValueMap<String, String> queryParams, HttpHeaders headerParams, MultiValueMap<String, String> cookieParams) {
+        String bearerToken = Optional.ofNullable(tokenSupplier).map(Supplier::get).orElse(null);
         if (bearerToken == null) {
             return;
         }
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/ApiClient.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/ApiClient.java
index 66e62a9a78f..0a73b802d4c 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/ApiClient.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/ApiClient.java
@@ -56,6 +56,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TimeZone;
+import java.util.function.Supplier;
 import java.time.OffsetDateTime;
 
 import org.openapitools.client.auth.Authentication;
@@ -170,9 +171,18 @@ public class ApiClient extends JavaTimeFormatter {
      * @param bearerToken the token
      */
     public void setBearerToken(String bearerToken) {
+        setBearerToken(() -> bearerToken);
+    }
+
+    /**
+     * Helper method to set the token supplier for HTTP bearer authentication.
+     *
+     * @param tokenSupplier the token supplier function
+     */
+    public void setBearerToken(Supplier<String> tokenSupplier) {
         for (Authentication auth : authentications.values()) {
             if (auth instanceof HttpBearerAuth) {
-                ((HttpBearerAuth) auth).setBearerToken(bearerToken);
+                ((HttpBearerAuth) auth).setBearerToken(tokenSupplier);
                 return;
             }
         }
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
index c11aa74e474..51d5e3278ef 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
@@ -1,27 +1,34 @@
 package org.openapitools.client.auth;
 
+import java.util.Optional;
+import java.util.function.Supplier;
 import org.springframework.http.HttpHeaders;
 import org.springframework.util.MultiValueMap;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HttpBearerAuth implements Authentication {
     private final String scheme;
-    private String bearerToken;
+    private Supplier<String> tokenSupplier;
 
     public HttpBearerAuth(String scheme) {
         this.scheme = scheme;
     }
 
     public String getBearerToken() {
-        return bearerToken;
+        return tokenSupplier.get();
     }
 
     public void setBearerToken(String bearerToken) {
-        this.bearerToken = bearerToken;
+        this.tokenSupplier = () -> bearerToken;
+    }
+    
+    public void setBearerToken(Supplier<String> tokenSupplier) {
+        this.tokenSupplier = tokenSupplier;
     }
 
     @Override
     public void applyToParams(MultiValueMap<String, String> queryParams, HttpHeaders headerParams, MultiValueMap<String, String> cookieParams) {
+        String bearerToken = Optional.ofNullable(tokenSupplier).map(Supplier::get).orElse(null);
         if (bearerToken == null) {
             return;
         }
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/ApiClient.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/ApiClient.java
index 7db043dde95..d6e6a8b07d2 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/ApiClient.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/ApiClient.java
@@ -51,6 +51,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TimeZone;
+import java.util.function.Supplier;
 import java.time.OffsetDateTime;
 
 import org.openapitools.client.auth.Authentication;
@@ -165,9 +166,18 @@ public class ApiClient extends JavaTimeFormatter {
      * @param bearerToken the token
      */
     public void setBearerToken(String bearerToken) {
+        setBearerToken(() -> bearerToken);
+    }
+
+    /**
+     * Helper method to set the token supplier for HTTP bearer authentication.
+     *
+     * @param tokenSupplier the token supplier function
+     */
+    public void setBearerToken(Supplier<String> tokenSupplier) {
         for (Authentication auth : authentications.values()) {
             if (auth instanceof HttpBearerAuth) {
-                ((HttpBearerAuth) auth).setBearerToken(bearerToken);
+                ((HttpBearerAuth) auth).setBearerToken(tokenSupplier);
                 return;
             }
         }
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
index c11aa74e474..51d5e3278ef 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java
@@ -1,27 +1,34 @@
 package org.openapitools.client.auth;
 
+import java.util.Optional;
+import java.util.function.Supplier;
 import org.springframework.http.HttpHeaders;
 import org.springframework.util.MultiValueMap;
 
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public class HttpBearerAuth implements Authentication {
     private final String scheme;
-    private String bearerToken;
+    private Supplier<String> tokenSupplier;
 
     public HttpBearerAuth(String scheme) {
         this.scheme = scheme;
     }
 
     public String getBearerToken() {
-        return bearerToken;
+        return tokenSupplier.get();
     }
 
     public void setBearerToken(String bearerToken) {
-        this.bearerToken = bearerToken;
+        this.tokenSupplier = () -> bearerToken;
+    }
+    
+    public void setBearerToken(Supplier<String> tokenSupplier) {
+        this.tokenSupplier = tokenSupplier;
     }
 
     @Override
     public void applyToParams(MultiValueMap<String, String> queryParams, HttpHeaders headerParams, MultiValueMap<String, String> cookieParams) {
+        String bearerToken = Optional.ofNullable(tokenSupplier).map(Supplier::get).orElse(null);
         if (bearerToken == null) {
             return;
         }