java - Character Encoding not working for Japanese ,Chinese and Korean

I have Unicode characters for all the European countries and for a few Asian countries like Japan, China, Korean. All the Unicodes are working fine for European countries except for Japan, China, Korean.

Example for Japan:

dear_name=\u30c7\u30a3\u30fc\u30e9\u30fc

Example for China:

dear_name=\u4eb2\u7231\u7684

Example for Korean:

dear_name=\uce5c\uc560\ud558\ub294

Example for Sweden (this one is working fine):

dear_name=Till

Default character encoding is UTF-8.

Template template = VelocityFactory.getTemplate("test.vm", "UTF-8");
   String messageText = VelocityFactory.merge(context, template, charset);

While debuging the merge method I found out that the merged result is getting grabled here itself for chinese,Japanese,korean.

public static String merge(VelocityContext context, Template template, String charset) throws Exception {


        String newResult = null;

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        OutputStreamWriter streamWriter;
        if(charset != null && charset.length() > 0) {
            streamWriter = new OutputStreamWriter(outputStream, charset);
        } else {
            streamWriter = new OutputStreamWriter(outputStream);
        }


        template.merge(context, streamWriter);
        streamWriter.close(); 

        mergedResult = outputStream.toString();                 
        outputStream.close();

        return newResult;        
    }
}

Below is the mail template and only for header it is displaying in correct format for Japanese, Chinese, and Korean, but not for the body:

          
        
    
    
        

            




                
                    

                        






                            
                                

                                    $velocityUtils.getMessage("test")
                                
                            
                            
                                


                                    
                                
                            
                        
                        
$velocityUtils.getMessage("test1")

    
                    
                
            
        
    

Any information how to fix this? How do i encode correctly??