diff --git a/conf/java/sample/lib-test-data.json b/conf/java/sample/lib-test-data.json
index 24d529e981d..70dfeec731a 100644
--- a/conf/java/sample/lib-test-data.json
+++ b/conf/java/sample/lib-test-data.json
@@ -9,6 +9,11 @@
   		"username":"testuser2",
   		"password":"password2",
   		"email":"test2@dummy.com"
+  	},
+  	{
+  		"username":"user?10",
+  		"password":"password2",
+  		"email":"test2@dummy.com"
   	}
   ],
   "petList":[
diff --git a/conf/java/sample/lib-test-script.json b/conf/java/sample/lib-test-script.json
index 7ca629d1c4a..557263818a8 100644
--- a/conf/java/sample/lib-test-script.json
+++ b/conf/java/sample/lib-test-script.json
@@ -164,6 +164,21 @@
                                 "expectedOutput" : "EXCEPTION"
                             }
 		                ]
+                    },
+                    {
+                        "name" : "Find user by name  with special characters",
+                        "id" : 5,
+                        "resourceId" : 9,
+                        "input" : {
+                            "username":"${input.userList[2].username}"
+                        },
+		                "assertions" : [
+                            {
+                                "actualOutput" : "${output(1.5).username}",
+                                "condition" : "==",
+                                "expectedOutput" : "${input.userList[2].username}"
+                            }
+		                ]
                     }
 
 
diff --git a/conf/java/templates/ResourceObject.st b/conf/java/templates/ResourceObject.st
index 587ad8130d6..57523c525c2 100644
--- a/conf/java/templates/ResourceObject.st
+++ b/conf/java/templates/ResourceObject.st
@@ -78,7 +78,7 @@ $method.queryParameters:{ argument |
 }$
 $method.pathParameters:{ argument |
 		if( $argument.name$ != null) {
-			resourcePath = resourcePath.replace("{$argument.name$}", $argument.name$);
+			resourcePath = resourcePath.replace("{$argument.name$}", APIInvoker.toPathValue($argument.name$));
 		}
 }$
 $method.headerParameters:{ argument |
@@ -96,7 +96,7 @@ $method.queryParameters:{ argument |
 }$
 $method.pathParameters:{ argument |
 		if( $argument.inputModelClassArgument$ != null && $argument.methodNameFromModelClass$ != null) {
-		 	resourcePath = resourcePath.replace("{$argument.name$}", $argument.methodNameFromModelClass$);	
+		 	resourcePath = resourcePath.replace("{$argument.name$}", APIInvoker.toPathValue($argument.methodNameFromModelClass$));
 		}
 }$
 $method.headerParameters:{ argument |
diff --git a/conf/scala/structure/src/main/java/com/wordnik/swagger/common/APIInvoker.java b/conf/scala/structure/src/main/java/com/wordnik/swagger/common/APIInvoker.java
index 2074fe630c4..4d42541124c 100644
--- a/conf/scala/structure/src/main/java/com/wordnik/swagger/common/APIInvoker.java
+++ b/conf/scala/structure/src/main/java/com/wordnik/swagger/common/APIInvoker.java
@@ -17,7 +17,9 @@
 package com.wordnik.swagger.common;
 
 import java.io.IOException;
+import java.io.UnsupportedEncodingException;
 import java.lang.String;
+import java.net.URLEncoder;
 import java.util.Map;
 import java.util.List;
 import java.util.HashMap;
@@ -250,7 +252,8 @@ public class APIInvoker {
      * @return
      */
     public static String toPathValue(String value) {
-        return  value == null ? "" : value;
+        value = (value == null) ? "" : value;
+        return encode(value);
     }
 
     /**
@@ -261,13 +264,22 @@ public class APIInvoker {
      */
     public static String toPathValue(List objects) {
         StringBuilder out = new StringBuilder();
+        String output = "";
         for(Object o: objects){
             out.append(o.toString());
             out.append(",");
         }
         if(out.indexOf(",") != -1) {
-            return out.substring(0, out.lastIndexOf(",") );
+            output = out.substring(0, out.lastIndexOf(",") );
+        }
+        return encode(output);
+    }
+
+    private static String encode(String value){
+        try{
+            return URLEncoder.encode(value, "utf-8").replaceAll("\\+", "%20");
+        }catch(UnsupportedEncodingException uee){
+            throw new RuntimeException(uee.getMessage());
         }
-        return out.toString();
     }
 }
diff --git a/conf/scala/templates/ResourceObject.st b/conf/scala/templates/ResourceObject.st
index 5d82515e964..29b2f9abd07 100644
--- a/conf/scala/templates/ResourceObject.st
+++ b/conf/scala/templates/ResourceObject.st
@@ -81,7 +81,7 @@ $method.headerParameters:{ argument |
 }$
 $method.pathParameters:{ argument |
         if(null != $argument.name$) {
-            resourcePath = resourcePath.replace("{$argument.name$}", $argument.name$)
+            resourcePath = resourcePath.replace("{$argument.name$}", APIInvoker.toPathValue($argument.name$))
         }
 }$
 $endif$        
@@ -98,7 +98,7 @@ $method.headerParameters:{ argument |
 }$
 $method.pathParameters:{ argument |
         if(null != $argument.inputModelClassArgument$ && null != $argument.methodNameFromModelClass$ ) {
-             resourcePath = resourcePath.replace("{$argument.name$}", $argument.methodNameFromModelClass$)    
+             resourcePath = resourcePath.replace("{$argument.name$}", APIInvoker.toPathValue($argument.methodNameFromModelClass$))
         }
 }$
 $endif$    
diff --git a/src/main/java/com/wordnik/swagger/runtime/common/APIInvoker.java b/src/main/java/com/wordnik/swagger/runtime/common/APIInvoker.java
index e361d362242..6eefcd88d06 100644
--- a/src/main/java/com/wordnik/swagger/runtime/common/APIInvoker.java
+++ b/src/main/java/com/wordnik/swagger/runtime/common/APIInvoker.java
@@ -17,7 +17,9 @@
 package com.wordnik.swagger.runtime.common;
 
 import java.io.IOException;
+import java.io.UnsupportedEncodingException;
 import java.lang.String;
+import java.net.URLEncoder;
 import java.util.Map;
 import java.util.List;
 import java.util.HashMap;
@@ -273,7 +275,8 @@ public class APIInvoker {
      * @return
      */
     public static String toPathValue(String value) {
-        return  value == null ? "" : value;
+        value = (value == null) ? "" : value;
+        return encode(value);
     }
 
     /**
@@ -284,14 +287,23 @@ public class APIInvoker {
      */
     public static String toPathValue(List objects) {
         StringBuilder out = new StringBuilder();
+        String output = "";
         for(Object o: objects){
             out.append(o.toString());
             out.append(",");
         }
         if(out.indexOf(",") != -1) {
-            return out.substring(0, out.lastIndexOf(",") );
+            output = out.substring(0, out.lastIndexOf(",") );
+        }
+        return encode(output);
+    }
+
+    private static String encode(String value){
+        try{
+            return URLEncoder.encode(value, "utf-8").replaceAll("\\+", "%20");
+        }catch(UnsupportedEncodingException uee){
+            throw new RuntimeException(uee.getMessage());
         }
-        return out.toString();
     }
 
     public boolean isLoggingEnable() {