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将Map封装成JavaBean，并使用List合并Map与Bean，反之亦然。简单来说，主要目的是设置Bean的字段，以及与Bean的注解和反射相关。可以将Bean的set方法编写成静态代码段。
把map封装成javaBean
/**
List合并-map-bean 反过来beanToMap相对比较简单些
主要是设置bean的filed， 与bean的注入和反射相关
可以把bean的set方法写成静态代码段
*/
private BrandTop getBean(List
> totalList, List
> subList, List
> totalCompList,List
> subCompList) { if (check(totalList) || check(subList)|| check(totalCompList)|| check(subCompList)) { return null; }; List
> totalBeanList = compTwoMap(totalList, totalCompList); List
> subComBeanList = compTwoMap(subList, subCompList); BrandTop brandTop = createBrandTop(totalBeanList.get(0)); List
brandTopList = new ArrayList<>(); for (Map
map : subComBeanList) { brandTopList.add(createBrandTop(map)); } brandTop.setSubList(brandTopList); return brandTop; } private boolean check(List
> checkList) { if (checkList == null || !checkList.isEmpty()) { return false; } return true; } private BrandTop createBrandTop(Map
map) { Method[] methods = BrandTop.class.getMethods(); Map
brandTopMap = new HashMap<>(); for (Method method : methods) { if (method.getName().contains("set")) { brandTopMap.put(method.getName(), method); } } BrandTop brandTop = new BrandTop(); for (Entry
entry : map.entrySet()) { String key = "set" +toUpCase(entry.getKey()); //没有此字段 if ("setCompBrandCate".equals(key)) { continue; } Method method = brandTopMap.get(key); try { setFileds(brandTop, entry, method); } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) { e.printStackTrace(); } } return brandTop; } private void setFileds(BrandTop brandTop, Entry
entry, Method method) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException { String fieldType = method.getParameters()[0].getParameterizedType().getTypeName(); String value = entry.getValue().toString(); if ("java.lang.String".equals(fieldType)) { method.invoke(brandTop, value); } else if ("Date".equals(fieldType)) { Date temp = parseDate(value); method.invoke(brandTop, temp); } else if ("Integer".equals(fieldType) || "int".equals(fieldType)) { Integer intval = (int) (Double.parseDouble(value)); method.invoke(brandTop, intval); } else if ("Long".equalsIgnoreCase(fieldType)) { Long temp = Long.parseLong(value); method.invoke(brandTop, temp); } else if ("Double".equalsIgnoreCase(fieldType)) { Double temp = Double.parseDouble(value); method.invoke(brandTop, temp); } else if ("Boolean".equalsIgnoreCase(fieldType)) { Boolean temp = Boolean.parseBoolean(value); method.invoke(brandTop, temp); } else { System.out.println("not supper type" + fieldType); } } private List
> compTwoMap(List
> totalList, List
> totalCompList) { for (int index = 0; index < totalCompList.size()&& index < totalList.size(); index++) { for (Entry
entry : totalCompList.get(index).entrySet()) { String key = toUpCase(entry.getKey()); totalList.get(index).put("comp" + key, entry.getValue()); } } return totalList; } private String toUpCase(String key) { return String.format("%s%s", key.substring(0, 1).toUpperCase(), key.substring(1)); } /** * 格式化string为Date * * @param datestr * @return */ public static Date parseDate(String datestr) { if (null == datestr || "".equals(datestr)) { return null; } try { String fmtstr; if (datestr.contains(":")) { fmtstr = "yyyy-MM-dd HH:mm:ss"; } else { fmtstr = "yyyy-MM-dd"; } SimpleDateFormat sdf = new SimpleDateFormat(fmtstr, Locale.UK); return sdf.parse(datestr); } catch (Exception e) { return null; } }
