贴上原代码
List<ReportDataModel.Data> data = new ArrayList<>();ReportDataModel.Data reportData = = new ReportDataModel().new Data(); for (TimeAndValue timeAndValue : timeAndValueList) { reportData.setName(indexType.getName()); Calendar cal = Calendar.getInstance(); cal.setTimeInMillis(timeAndValue.getTime()); if (model.getType() == QUERY_TYPE_YEAR) {// 年 reportData.setTime(SDF_YEAR.format(cal.getTime())); } else if (model.getType() == QUERY_TYPE_MONTH) {// 月 reportData.setTime(SDF_YEAR_MONTH.format(cal.getTime())); } else if (model.getType() == QUERY_TYPE_WEEK) {// 周 reportData.setTime(cal.get(Calendar.YEAR) + "-" + cal.get(Calendar.DAY_OF_WEEK)); } else if (model.getType() == QUERY_TYPE_DAY) {// 日 reportData.setTime(SDF_YEAR_MONTH_DAY.format(cal.getTime())); } else if (model.getType() == QUERY_TYPE_HOUR) {// 小时 reportData.setTime(SDF_YEAR_MONTH_DAY_HOUR.format(cal.getTime())); } if (timeAndValue.isDouble()) { reportData.setData(timeAndValue.getDoubleValue()); } else if (timeAndValue.isLong()) { reportData.setData((double) timeAndValue.getLongValue()); } data.add(reportData); }贴上改正后的代码
List<ReportDataModel.Data> data = new ArrayList<>();ReportDataModel.Data reportData = null; for (TimeAndValue timeAndValue : timeAndValueList) { reportData = new ReportDataModel().new Data(); reportData.setName(indexType.getName()); Calendar cal = Calendar.getInstance(); cal.setTimeInMillis(timeAndValue.getTime()); if (model.getType() == QUERY_TYPE_YEAR) {// 年 reportData.setTime(SDF_YEAR.format(cal.getTime())); } else if (model.getType() == QUERY_TYPE_MONTH) {// 月 reportData.setTime(SDF_YEAR_MONTH.format(cal.getTime())); } else if (model.getType() == QUERY_TYPE_WEEK) {// 周 reportData.setTime(cal.get(Calendar.YEAR) + "-" + cal.get(Calendar.DAY_OF_WEEK)); } else if (model.getType() == QUERY_TYPE_DAY) {// 日 reportData.setTime(SDF_YEAR_MONTH_DAY.format(cal.getTime())); } else if (model.getType() == QUERY_TYPE_HOUR) {// 小时 reportData.setTime(SDF_YEAR_MONTH_DAY_HOUR.format(cal.getTime())); } if (timeAndValue.isDouble()) { reportData.setData(timeAndValue.getDoubleValue()); } else if (timeAndValue.isLong()) { reportData.setData((double) timeAndValue.getLongValue()); } data.add(reportData); }请大家注意看原代码这一行：ReportDataModel.Data reportData = = new ReportDataModel().new Data(); 以及对比新代码ReportDataModel.Data reportData = null;然后再for循环中以及实例化对象，原代码相当于重复操作内存中的一个对象， 固然出现了重复数据，记下来自己挖的坑自己填起来。
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