private String getPreMonth(String date) throws Exception { SimpleDateFormat dft = new SimpleDateFormat("yyyyMMddHHmmss"); Date dt = dft.parse(date); Calendar rightNow = Calendar.getInstance(); rightNow.setTime(dt); rightNow.add(Calendar.MONTH, appConfig.getCreditInvestigation()); Date dt1 = rightNow.getTime(); String reStr = dft.format(dt1); return reStr; }