如何在代码中关闭最外面的StringWriter / PrintWriter流'writer'

Question

我尝试过writer.flush()和writer.close()，但仍然存在违反警报，以关闭流。

StringWriter writer = new StringWriter();
ex.printStackTrace(**new PrintWriter(writer))**;
writer.flush();
writer.close();
batchStatusService.error(jobJournalDao.findByInstanceId(jobCtx.getExecutionId())
                     ,writer.toString() );

Answer 1

添加finally方法或使用tr（resource）关闭写入