从risberg的评论中有一个有用的例子：-
https://github.com/trisberg/springone-2015/tree/master/boot-ingest
datawriter接口的textfilewriter实现的另一个代码段：-

//build naming strategy
             ChainedFileNamingStrategy namingStrategy = 
      new ChainedFileNamingStrategy( 
            Arrays.asList(new FileNamingStrategy[] { 
                new StaticFileNamingStrategy("document"),
                         new UuidFileNamingStrategy(someUUID),
                          new StaticFileNamingStrategy("txt", ".") }));
        //set the naming strategy 
            textFileWriter.setFileNamingStrategy(namingStrategy);
            textFileWriter.write("this is a test content");
       //flush and close the writer
            textFileWriter.flush();
            textFileWriter.close();