Merge pull request #1131 from swagger-api/codegen-issue-11797

added templates to support jersey3 in java generator

Author: HugoMario

src/main/java/io/swagger/codegen/v3/generators/java/JavaClientCodegen.java

@@ -90,6 +90,7 @@ public JavaClientCodegen() {
         supportedLibraries.put("jersey1", "HTTP client: Jersey client 1.19.4. JSON processing: Jackson 2.10.1. Enable gzip request encoding using '-DuseGzipFeature=true'.");
         supportedLibraries.put("feign", "HTTP client: OpenFeign 9.4.0. JSON processing: Jackson 2.10.1");
         supportedLibraries.put("jersey2", "HTTP client: Jersey client 2.26. JSON processing: Jackson 2.10.1");
+        supportedLibraries.put("jersey3", "HTTP client: Jersey client 3.0.10. JSON processing: Jackson 2.10.2");
         supportedLibraries.put("okhttp-gson", "HTTP client: OkHttp 2.7.5. JSON processing: Gson 2.8.1. Enable Parcelable models on Android using '-DparcelableModel=true'. Enable gzip request encoding using '-DuseGzipFeature=true'.");
         supportedLibraries.put("okhttp4-gson", "HTTP client: OkHttp 4.10.0. JSON processing: Gson 2.10.1. Enable Parcelable models on Android using '-DparcelableModel=true'. Enable gzip request encoding using '-DuseGzipFeature=true'.");
         supportedLibraries.put(RETROFIT_1, "HTTP client: OkHttp 2.7.5. JSON processing: Gson 2.3.1 (Retrofit 1.9.0). IMPORTANT NOTE: retrofit1.x is no longer actively maintained so please upgrade to 'retrofit2' instead.");
@@ -126,6 +127,10 @@ public void processOpts() {
         if (RETROFIT_1.equalsIgnoreCase(library)) {
             dateLibrary = "joda";
         }
+        if ("jersey3".equalsIgnoreCase(library)) {
+            dateLibrary = "java8";
+            additionalProperties.put(JAKARTA, true);
+        }
 
         super.processOpts();
 
@@ -248,7 +253,7 @@ public void processOpts() {
             if ("retrofit2".equals(getLibrary()) && !usePlayWS) {
                 supportingFiles.add(new SupportingFile("JSON.mustache", invokerFolder, "JSON.java"));
             }
-        } else if ("jersey2".equals(getLibrary()) || "resteasy".equals(getLibrary()))  {
+        } else if ("jersey3".equals(getLibrary()) || "jersey2".equals(getLibrary()) || "resteasy".equals(getLibrary()))  {
             supportingFiles.add(new SupportingFile("JSON.mustache", invokerFolder, "JSON.java"));
             additionalProperties.put("jackson", "true");
         } else if("jersey1".equals(getLibrary())) {