Bug 155178 [Deploy] Preview report failed on war deployed weblogic server
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
outputStream.write( buf.toString( ).getBytes(
							ParameterAccessor.UTF_8_ENCODE ) );
					buf.delete( 0, buf.length( ) );
					
					while ( iData.next( ) )
					{
						String value = null;
						try
						{
							value = cvsConvertor( (String) DataTypeUtil
									.convert( iData.getValue( columnNames[0] ),
											DataType.STRING_TYPE ) );
						}
						catch ( Exception e )
						{
							
						}
						if ( value != null )
						{
							buf.append( value );
						}
						for ( int i = 1; i < columnNames.length; i++ )
						{
							buf.append( ',' );
							try
							{
								value = cvsConvertor( (String) DataTypeUtil
										.convert( iData
												.getValue( columnNames[i] ),
												DataType.STRING_TYPE ) );