Java: 0 Warnings for generated code

[jfiala]

Description

Currently the generated Java files reference imports that are not used, resulting in compiler warnings.

e.g. for Java jaxrs-cxf Models:

import java.io.File; // Warning e.g. in Models
import io.swagger.model.HelloModel;

import java.io.InputStream; // Warning e.g. in Models
import java.io.OutputStream; // Warning e.g. in Models
import java.util.List; // Warning e.g. in Models
import java.util.Map; // Warning e.g. in Models
import javax.ws.rs.*;
import javax.ws.rs.core.Response; // Warning e.g. in Models

Swagger-codegen version

master

Suggest a fix/enhancement

The quick fix would be to use more generalized imports like :

import java.io.*;
import javax.ws.rs.*;
import javax.ws.rs.core.*;

Alternatively or supplementing this, we could use a routine to automatically cleanup the unused imports after generating the code?

[jfiala]

@wing328 what do you think of this?