fix for #235

src/main/resources/Java/api.mustache

@@ -6,6 +6,10 @@ import {{invokerPackage}}.ApiInvoker;
 {{#imports}}import {{import}};
 {{/imports}}
 
+import com.sun.jersey.multipart.FormDataMultiPart;
+
+import javax.ws.rs.core.MediaType;
+
 import java.io.File;
 import java.util.*;
 
@@ -32,6 +36,7 @@ public class {{classname}} {
   {{/responseModel}}
   {{/errorList}}  
   public {{#returnType}}{{{returnType}}} {{/returnType}}{{^returnType}}void {{/returnType}} {{nickname}} ({{#allParams}}{{{dataType}}} {{paramName}}{{#hasMore}}, {{/hasMore}}{{/allParams}}) throws ApiException {
+    Object postBody = {{#bodyParam}}{{bodyParam}}{{/bodyParam}}{{^bodyParam}}null{{/bodyParam}};
     {{#requiredParamCount}}
     // verify required params are set
     if({{/requiredParamCount}}{{#requiredParams}} {{paramName}} == null {{#hasMore}}|| {{/hasMore}}{{/requiredParams}}{{#requiredParamCount}}) {
@@ -54,17 +59,35 @@ public class {{classname}} {
     {{#headerParams}}headerParams.put("{{baseName}}", {{paramName}});
     {{/headerParams}}
 
-    {{#formParams}}formParams.put("{{baseName}}", {{paramName}});
-    {{/formParams}}
-
     String[] contentTypes = {
       {{#consumes}}"{{mediaType}}"{{#hasMore}},{{/hasMore}}{{/consumes}}
     };
 
     String contentType = contentTypes.length > 0 ? contentTypes[0] : "application/json";
 
+    if(contentType.startsWith("multipart/form-data")) {
+      boolean hasFields = false;
+      FormDataMultiPart mp = new FormDataMultiPart();
+      {{#formParams}}
+      {{#notFile}}
+      hasFields = true;
+      mp.field("{{baseName}}", "{{paramName}}", MediaType.MULTIPART_FORM_DATA_TYPE);
+      {{/notFile}}
+      {{#isFile}}
+      hasFields = true;
+      mp.field("{{baseName}}", {{paramName}}, MediaType.MULTIPART_FORM_DATA_TYPE);
+      {{/isFile}}
+      {{/formParams}}
+      if(hasFields)
+        postBody = mp;
+    }
+    else {
+      {{#formParams}}{{#notFile}}formParams.put("{{baseName}}", {{paramName}});{{/notFile}}
+      {{/formParams}}
+    }
+
     try {
-      String response = apiInvoker.invokeAPI(basePath, path, "{{httpMethod}}", queryParams, {{#bodyParam}}{{bodyParam}}{{/bodyParam}}{{^bodyParam}}null{{/bodyParam}}, headerParams, formParams, contentType);
+      String response = apiInvoker.invokeAPI(basePath, path, "{{httpMethod}}", queryParams, postBody, headerParams, formParams, contentType);
       if(response != null){
         return {{#returnType}}({{{returnType}}}) ApiInvoker.deserialize(response, "{{returnContainer}}", {{returnBaseType}}.class){{/returnType}};
       }

src/main/resources/Java/apiInvoker.mustache

@@ -11,6 +11,7 @@ import com.sun.jersey.api.client.config.ClientConfig;
 import com.sun.jersey.api.client.config.DefaultClientConfig;
 import com.sun.jersey.api.client.filter.LoggingFilter;
 import com.sun.jersey.api.client.WebResource.Builder;
+import com.sun.jersey.multipart.FormDataMultiPart;
 
 import javax.ws.rs.core.Response.Status.Family;
 import javax.ws.rs.core.MediaType;
@@ -117,7 +118,10 @@ public class ApiInvoker {
     }
     else if ("POST".equals(method)) {
       if(body == null)
-        response = builder.post(ClientResponse.class, serialize(body));
+        response = builder.post(ClientResponse.class, null);
+      else if(body instanceof FormDataMultiPart) {
+        response = builder.type(contentType).post(ClientResponse.class, body);
+      }
       else
         response = builder.type(contentType).post(ClientResponse.class, serialize(body));
     }

src/main/resources/Java/pom.mustache

@@ -160,6 +160,12 @@
       <version>${jersey-version}</version>
       <scope>compile</scope>
     </dependency>
+    <dependency>
+      <groupId>com.sun.jersey.contribs</groupId>
+      <artifactId>jersey-multipart</artifactId>
+      <version>${jersey-version}</version>
+      <scope>compile</scope>
+    </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-core</artifactId>