实体转Map,根据值排序_实体转按字段名排序map-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_40811171/article/details/129727308

这段代码展示了如何在Java中创建一个SysUser对象，设置其属性，然后将Bean转换为Map并按值排序。排序使用了LinkedHashMap和自定义的MapValueComparator比较器。

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public static void main(String[] args) {
        SysUser sysUser = new SysUser();
        sysUser.setDelFlag("0");
        sysUser.setUserId(1323L);
        sysUser.setRemark("nihao");
        sysUser.setRoles(Lists.newArrayList(new SysRole()));
        BeanMap beanMap = BeanMap.create(sysUser);
        Map map = sortMapByValue(beanMap);
        System.out.println(map);
    }
    /**
     * 使用 Map按value进行排序
     * @return
     */
    public static Map<String, String> sortMapByValue(Map<String, String> oriMap) {
        if (oriMap == null || oriMap.isEmpty()) {
            return null;
        }
        Map<String, String> sortedMap = new LinkedHashMap<String, String>();
        List<Map.Entry<String, String>> entryList = new ArrayList<Map.Entry<String, String>>(
                oriMap.entrySet());
        Collections.sort(entryList, new MapValueComparator());

        Iterator<Map.Entry<String, String>> iter = entryList.iterator();
        Map.Entry<String, String> tmpEntry = null;
        while (iter.hasNext()) {
            tmpEntry = iter.next();
            sortedMap.put(tmpEntry.getKey(), tmpEntry.getValue());
        }
        return sortedMap;
    }
   public  static class MapValueComparator implements Comparator<Map.Entry<String, String>> {

        @Override
        public int compare(Map.Entry<String, String> me1, Map.Entry<String, String> me2) {

            return String.valueOf(me1.getValue()).compareTo(String.valueOf(me2.getValue()));
        }
    }