今天做的项目中，遇到一个计算同期环比和上期环比的计算并显示出来。这是用ssm框架

  代码示例：

  

@RequiresPermissions("analysis:analysis:smartSearch") @RequestMapping(value = "/analysis/analysis/smartSearch") public String smartSearch() { Page<ElectronicTax> page = new Page<ElectronicTax>(request, response); //page.setPageSize( 25 ); if ( POST ) { if ( !"".equals(request.getParameter("pageSize")) ) { el.setPage(page); } Map<String, ArrayList<Map<String, Object>>> dataList = new HashMap<String, ArrayList<Map<String,Object>>>(); Map<String, List<String>> keyOne = new HashMap<String, List<String>>(); String transverse=null, munehisa=null; List<Map<String, Object>> list = companyService.getElectronicTaxDao().getSmartSearch(el); for( Map<String, Object> m : list ) { if ( m != null ) { Iterator<Entry<String, Object>> itr = m.entrySet().iterator(); while( itr.hasNext() ) { Entry<String, Object> ety = itr.next(); String key = ety.getKey(); String value = ety.getValue().toString(); if ( "amount".equals(key) || ("accounting".equals(key) && el.getIsTime() == null )) continue; if ( keyOne.get(key) == null ) { if ( munehisa == null ) { munehisa = key; } else { transverse = key; } keyOne.put(key, new ArrayList<String>()); } if ( !keyOne.get(key).contains( value ) ) { keyOne.get(key).add(value); } } } } //横向为空，则只选择了一个字段，那么横向TITLE为金额 if ( transverse == null ) { //transverse = "amount"; keyOne.put(transverse, new ArrayList<String>()); keyOne.get(transverse).add("金额"); System.out.println(keyOne.get(transverse)); } else { if ( keyOne.get(transverse).size() > keyOne.get(munehisa).size()) { 
    //纵横向互换 String s = transverse; transverse = munehisa; munehisa = s; } model.addAttribute("transverse_param", getParam(transverse)); } model.addAttribute("munehisa_param", getParam(munehisa)); Double currentsAmounts = null; Double LastsAmounts = null; for( Map<String, Object> m : list ) { if ( dataList.get( m.get(munehisa) ) == null ) { ArrayList<Map<String, Object>> tmpList = new ArrayList<Map<String, Object>>(); Map<String, Object> twelveMap = new HashMap<String, Object>(); for( Map<String, Object> mm : list ) { if ( m.get(munehisa).equals( mm.get(munehisa) ) ) { if ( transverse == null ) { twelveMap.put("金额", mm.get("amount")); } else twelveMap.put(mm.get(transverse).toString(), mm.get("amount")); } } for( String ym : keyOne.get(transverse) ) { Map<String, Object> map = new HashMap<String, Object>(); Double currentAmount; map.put(transverse, ym); if ( twelveMap.get(ym) == null ) { currentAmount = 0.0; } else { currentAmount = Double.parseDouble( twelveMap.get(ym).toString() ); } map.put("amount", currentAmount); //对比计算 if ( el.getIdenticalCompare() != null ) { // System.out.println(m.get(transverse).toString()); // System.out.println(m.get(munehisa).toString()); // System.out.println(munehisa); // Double amount = companyService.getLastYearCount(m.get(transverse).toString(), m.get(munehisa).toString(), munehisa); // double amount=20; Double amount = 30d; amount.toString(); map.put("identical", currentAmount - amount); if ( amount > 0 ) { map.put("identicals", (currentAmount - amount)/amount); } else map.put("identicals", 100); } if ( el.getRingCompare() != null ) { Double amount = companyService.getLastMonthCount(m.get(transverse).toString(), m.get(munehisa).toString(), munehisa); if ( amount > 0 ) { map.put("ring", (currentAmount - amount)/amount); } else map.put("ring", 100); } if ( el.getCumulativeCompare() != null ) { Double currentAmounts = companyService.getCumulativeCompare(m.get(transverse).toString(), m.get(munehisa).toString(), munehisa, "current"); Double LastAmounts = companyService.getCumulativeCompare(m.get(transverse).toString(), m.get(munehisa).toString(), munehisa, ""); //所有行业同比增量 if ( currentsAmounts == null ) { currentsAmounts = companyService.getCumulativeCompare(m.get(transverse).toString(),"", munehisa, "current"); LastsAmounts = companyService.getCumulativeCompare(m.get(transverse).toString(), "", munehisa, ""); } map.put("cumulative", currentAmounts); map.put("cumulatives", currentAmounts-LastAmounts);//增量 if ( LastAmounts > 0 ) { map.put("cumulativess", (currentAmounts-LastAmounts)/LastAmounts);//增速  } else { map.put("cumulativess", 100);//增量  } if ( currentsAmounts > 0 || LastsAmounts > 0) { map.put("cumulativesss", (currentAmounts-LastAmounts)/(currentsAmounts-LastsAmounts));//增速  } else { map.put("cumulativesss", 100);//增量  } } tmpList.add( map ); } dataList.put(m.get(munehisa).toString(), tmpList); } } model.addAttribute("dataList", dataList); model.addAttribute("transverse", keyOne.get(transverse)); } if ( !"".equals(request.getParameter("pageSize")) ) { model.addAttribute("page", page); } model.addAttribute("yearMonthList", companyService.getYearMonth()); return "addons/analysis/analysis/smartSearch"; }