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在当前项目的开发任务中需要定制财务报表导出功能#xff0c;格式比较特殊使用了VM。在汇总数据的过程中使用了stream.collect 进行分组汇总。在测试的过程中发现分组失败#xff0c;最终原因是对象的对比方式问题#xff0c;collect是根据对象对比的所以需要重写equa…背景
在当前项目的开发任务中需要定制财务报表导出功能格式比较特殊使用了VM。在汇总数据的过程中使用了stream.collect 进行分组汇总。在测试的过程中发现分组失败最终原因是对象的对比方式问题collect是根据对象对比的所以需要重写equals。
问题代码 private ListSettlementSheet sumStkPosition(ListSettlementSheet dataList){ListSettlementSheet resList new ArrayList();MapKeyGroup, ListSettlementSheet groupedData dataList.stream().collect(Collectors.groupingBy(obj - new KeyGroup(obj.getSEATID_(),obj.getPZ_(),obj.getHOLDERACC_(),obj.getSTKCODE_(),obj.getHEDGINGFLAG_())));for (Map.EntryKeyGroup, ListSettlementSheet entry : groupedData.entrySet()) {KeyGroup key entry.getKey();ListSettlementSheet group entry.getValue();double sumBstkamt group.stream().mapToDouble(obj - Double.parseDouble(obj.getBSTKAMT_().toString())).sum();double sumBcap group.stream().mapToDouble(obj - Double.parseDouble(obj.getBSTKAMT_().toString()) *Double.parseDouble(obj.getBCJJJ_().toString())).sum();double avgBcjjj sumBstkamt 0 ? 0 : sumBcap / sumBstkamt;double sumSstkamt group.stream().mapToDouble(obj - Double.parseDouble(obj.getSSTKAMT_().toString())).sum();double sumScap group.stream().mapToDouble(obj - Double.parseDouble(obj.getSSTKAMT_().toString()) *Double.parseDouble(obj.getSCJJJ_().toString())).sum();double avgScjjj sumSstkamt 0 ? 0 : sumScap / sumSstkamt;double dzrjs group.stream().mapToDouble(obj - Double.parseDouble(obj.getZRJS_()null?0:obj.getZRJS_().toString())).max().orElse(0.0);double djrjs group.stream().mapToDouble(obj - Double.parseDouble(obj.getJRJS_()null?0:obj.getJRJS_().toString())).max().orElse(0.0);double ddprofit group.stream().mapToDouble(obj - Double.parseDouble(obj.getDPROFIT_().toString())).sum();double dmargin group.stream().mapToDouble(obj - Double.parseDouble(obj.getMARGIN_().toString())).sum();double dstkvalueOptd group.stream().mapToDouble(obj - Double.parseDouble(obj.getSTKVALUEOPTD_().toString())).sum();double dstkvalueOptk group.stream().mapToDouble(obj - Double.parseDouble(obj.getSTKVALUEOPTK_().toString())).sum();SettlementSheet rowData new SettlementSheet();rowData.setSEATID_(key.getSEATID_());rowData.setPZ_(key.getPREFIX_());rowData.setHOLDERACC_(key.getHOLDERACC_());rowData.setSTKCODE_(key.getSTKCODE_());rowData.setHEDGINGFLAG_(key.getHEDGINGFLAG_());rowData.setBSTKAMT_(BigDecimal.valueOf(sumBstkamt));rowData.setBCJJJ_(BigDecimal.valueOf(avgBcjjj).setScale(2, RoundingMode.HALF_UP));rowData.setSSTKAMT_(BigDecimal.valueOf(sumSstkamt));rowData.setSCJJJ_(BigDecimal.valueOf(avgScjjj).setScale(2, RoundingMode.HALF_UP));rowData.setZRJS_(BigDecimal.valueOf(dzrjs));rowData.setJRJS_(BigDecimal.valueOf(djrjs));rowData.setDPROFIT_(BigDecimal.valueOf(ddprofit));rowData.setMARGIN_(BigDecimal.valueOf(dmargin).setScale(2, RoundingMode.HALF_UP));rowData.setSTKVALUEOPTD_(BigDecimal.valueOf(dstkvalueOptd));rowData.setSTKVALUEOPTK_(BigDecimal.valueOf(dstkvalueOptk));resList.add(rowData);}return resList;} private class KeyGroup{private String SEATID_;public KeyGroup(String SEATID_, String PREFIX_, String HOLDERACC_, String STKCODE_, String HEDGINGFLAG_) {this.SEATID_ SEATID_;this.PREFIX_ PREFIX_;this.HOLDERACC_ HOLDERACC_;this.STKCODE_ STKCODE_;this.HEDGINGFLAG_ HEDGINGFLAG_;}private String PREFIX_;private String HOLDERACC_;private String STKCODE_;private String HEDGINGFLAG_;public String getSEATID_() {return SEATID_;}public void setSEATID_(String SEATID_) {this.SEATID_ SEATID_;}public String getPREFIX_() {return PREFIX_;}public void setPREFIX_(String PREFIX_) {this.PREFIX_ PREFIX_;}public String getHOLDERACC_() {return HOLDERACC_;}public void setHOLDERACC_(String HOLDERACC_) {this.HOLDERACC_ HOLDERACC_;}public String getSTKCODE_() {return STKCODE_;}public void setSTKCODE_(String STKCODE_) {this.STKCODE_ STKCODE_;}public String getHEDGINGFLAG_() {return HEDGINGFLAG_;}public void setHEDGINGFLAG_(String HEDGINGFLAG_) {this.HEDGINGFLAG_ HEDGINGFLAG_;}}
解决方法
重写equals方法 Overridepublic boolean equals(Object obj) {if (this obj) {return true;}if (obj null || getClass() ! obj.getClass()) {return false;}KeyGroup mkPriceKey (KeyGroup) obj;return Objects.equals(this.SEATID_, mkPriceKey.SEATID_) Objects.equals(this.PREFIX_, mkPriceKey.PREFIX_) Objects.equals(this.HOLDERACC_, mkPriceKey.HOLDERACC_) Objects.equals(this.STKCODE_, mkPriceKey.STKCODE_) Objects.equals(this.HEDGINGFLAG_, mkPriceKey.HEDGINGFLAG_);}
修正后代码 private class KeyGroup{private String SEATID_;public KeyGroup(String SEATID_, String PREFIX_, String HOLDERACC_, String STKCODE_, String HEDGINGFLAG_) {this.SEATID_ SEATID_;this.PREFIX_ PREFIX_;this.HOLDERACC_ HOLDERACC_;this.STKCODE_ STKCODE_;this.HEDGINGFLAG_ HEDGINGFLAG_;}private String PREFIX_;private String HOLDERACC_;private String STKCODE_;private String HEDGINGFLAG_;public String getSEATID_() {return SEATID_;}public void setSEATID_(String SEATID_) {this.SEATID_ SEATID_;}public String getPREFIX_() {return PREFIX_;}public void setPREFIX_(String PREFIX_) {this.PREFIX_ PREFIX_;}public String getHOLDERACC_() {return HOLDERACC_;}public void setHOLDERACC_(String HOLDERACC_) {this.HOLDERACC_ HOLDERACC_;}public String getSTKCODE_() {return STKCODE_;}public void setSTKCODE_(String STKCODE_) {this.STKCODE_ STKCODE_;}public String getHEDGINGFLAG_() {return HEDGINGFLAG_;}public void setHEDGINGFLAG_(String HEDGINGFLAG_) {this.HEDGINGFLAG_ HEDGINGFLAG_;}Overridepublic int hashCode() {return Objects.hash(SEATID_, PREFIX_, HOLDERACC_, STKCODE_, HEDGINGFLAG_);}Overridepublic boolean equals(Object obj) {if (this obj) {return true;}if (obj null || getClass() ! obj.getClass()) {return false;}KeyGroup mkPriceKey (KeyGroup) obj;return Objects.equals(this.SEATID_, mkPriceKey.SEATID_) Objects.equals(this.PREFIX_, mkPriceKey.PREFIX_) Objects.equals(this.HOLDERACC_, mkPriceKey.HOLDERACC_) Objects.equals(this.STKCODE_, mkPriceKey.STKCODE_) Objects.equals(this.HEDGINGFLAG_, mkPriceKey.HEDGINGFLAG_);}}
总结
应该有更好的实现方式java使用的不是很熟练。之后有新思路再来更新。
