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Collections.sort排序

Collections.sort排序

作者: haiyong6 | 来源:发表于2018-07-01 10:20 被阅读0次
    List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
                Map<String, Object> map = new HashMap<String, Object>();
                map.put("name", "name1");
                map.put("value", 2);
                list.add(map);
                
                Map<String, Object> map1 = new HashMap<String, Object>();
                map1.put("name", "name2");
                map1.put("value", 16);
                list.add(map1);
                
                Map<String, Object> map2 = new HashMap<String, Object>();
                map2.put("name", "name3");
                map2.put("value", 8);
                list.add(map2);
                
                Collections.sort(list, new Comparator<Map<String, Object>>(){  
                       public int compare(Map<String, Object> v1, Map<String, Object> v2) { 
                           if(Integer.parseInt(v1.get("value").toString()) < Integer.parseInt(v2.get("value").toString())) {
                               return 1;
                           } else if(Integer.parseInt(v1.get("value").toString()) > Integer.parseInt(v2.get("value").toString())) {
                               return -1;
                           } else {
                               return 0;    
                           }
                       }
                 });
                
                for(int i = 0; i < list.size(); i++){
                    System.out.println(list.get(i).get("name") + " " + list.get(i).get("value"));
                }
    
    

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