public MultiPartConfig defaultFileName(String defaultFileName) {
        return new MultiPartConfig(defaultControlName, defaultFileName, defaultSubtype, defaultBoundary, defaultCharset, true);
    }
public MultiPartConfig defaultFileName(String defaultFileName) {
        return new MultiPartConfig(defaultControlName, defaultFileName, defaultSubtype, defaultBoundary, defaultCharset, true);
    }
public MultiPartConfig defaultFileName ( String defaultFileName ) { return new MultiPartConfig ( defaultControlName , defaultFileName , defaultSubtype , defaultBoundary , defaultCharset , true ) ; }
Specify the default filename to use if not defined explicitly in multi-part request.
<p>
Default is {@value #DEFAULT_FILE_NAME}
</p>

@param defaultFileName The file name to use
@return A new instance of {@link MultiPartConfig}
Specify the default filename to use if not defined explicitly in multi - part request . <p > Default is { @value #DEFAULT_FILE_NAME } < / p >