Fix proto `package` and ` java_package` issue (#13559)

* Fix pb package issue

* Codestyle fix

* Fix npe in test

* Fix npe in test

* Fix test

* Codestyle fix

* Simplify config

* Update ServiceConfig.java

dubbo-common/src/main/java/org/apache/dubbo/config/AbstractServiceConfig.java

@@ -155,6 +155,12 @@ public abstract class AbstractServiceConfig extends AbstractInterfaceConfig {
      */
     private Integer payload;
 
+    /**
+     * Whether to use java_package in IDL as path. Default use package.
+     * This param only available when service using native stub.
+     */
+    private Boolean useJavaPackageAsPath;
+
     public AbstractServiceConfig() {}
 
     public AbstractServiceConfig(ModuleModel moduleModel) {
@@ -170,7 +176,9 @@ public abstract class AbstractServiceConfig extends AbstractInterfaceConfig {
         if (dynamic == null) {
             dynamic = true;
         }
-
+        if (useJavaPackageAsPath == null) {
+            useJavaPackageAsPath = false;
+        }
         if (StringUtils.isBlank(preferSerialization)) {
             preferSerialization = serialization;
         }
@@ -388,4 +396,13 @@ public abstract class AbstractServiceConfig extends AbstractInterfaceConfig {
     public void setPayload(Integer payload) {
         this.payload = payload;
     }
+
+    public Boolean getUseJavaPackageAsPath() {
+        return useJavaPackageAsPath;
+    }
+
+    @Parameter(excluded = true)
+    public void setUseJavaPackageAsPath(Boolean useJavaPackageAsPath) {
+        this.useJavaPackageAsPath = useJavaPackageAsPath;
+    }
 }

dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/ServiceConfig.java

@@ -548,6 +548,10 @@ public class ServiceConfig<T> extends ServiceConfigBase<T> {
         final boolean serverService = ref instanceof ServerService;
         if (serverService) {
             serviceDescriptor = ((ServerService) ref).getServiceDescriptor();
+            if (!this.provider.getUseJavaPackageAsPath()) {
+                // for stub service, path always interface name or IDL package name
+                this.path = serviceDescriptor.getInterfaceName();
+            }
             repository.registerService(serviceDescriptor);
         } else {
             serviceDescriptor = repository.registerService(getInterfaceClass());