java中hashMap的排序

发布时间：2020-12-14 06:21:43 所属栏目：Java 来源：网络整理

导读：hashMap排序，示例: > unSupportedDatesMap= HashMap > "14:00-18:00", ArrayList "9:00-12:00", ArrayList "19:00-22:00", ArrayList List/spanMap.EntryString,ListString intervals = span style="color: #0000ff;"gt;new/span ArrayListMap.EntryString,

hashMap排序，示例:

> unSupportedDatesMap= HashMap>"14:00-18:00", ArrayList"9:00-12:00", ArrayList"19:00-22:00", ArrayList

    List</span><Map.Entry<String,List<String>>> intervals =
            <span style="color: #0000ff;"&gt;new</span> ArrayList<Map.Entry<String,List<String>>><span style="color: #000000;"&gt;(unSupportedDatesMap.entrySet());

    </span><span style="color: #008000;"&gt;//</span><span style="color: #008000;"&gt;排序前</span>
    System.out.println("------------------排序前--------------------------"<span style="color: #000000;"&gt;);
    </span><span style="color: #0000ff;"&gt;for</span> (<span style="color: #0000ff;"&gt;int</span> i = 0; i < intervals.size(); i++<span style="color: #000000;"&gt;) {
        String id </span>=<span style="color: #000000;"&gt; intervals.get(i).toString();
        System.out.println(id);
    }

    </span><span style="color: #008000;"&gt;//</span><span style="color: #008000;"&gt;排序</span>
    Collections.sort(intervals,<span style="color: #0000ff;"&gt;new</span> Comparator<Map.Entry<String,List<String>>><span style="color: #000000;"&gt;() {   
        </span><span style="color: #0000ff;"&gt;public</span> <span style="color: #0000ff;"&gt;int</span> compare(Map.Entry<String,List<String>> o1,Map.Entry<String,List<String>><span style="color: #000000;"&gt; o2) { 
            String intervalTime1 </span>=<span style="color: #000000;"&gt; o1.getKey();
            String fromTime1 </span>=intervalTime1.split("-")[0<span style="color: #000000;"&gt;];
            String intervalTime2 </span>=<span style="color: #000000;"&gt; o2.getKey();
            String fromTime2 </span>=intervalTime2.split("-")[0<span style="color: #000000;"&gt;];
            </span><span style="color: #008000;"&gt;//</span><span style="color: #008000;"&gt;转换为分钟值</span>
            String hour1=fromTime1.split(":")[0<span style="color: #000000;"&gt;].trim();
            String mininute1</span>=fromTime1.split(":")[1<span style="color: #000000;"&gt;].trim();
            </span><span style="color: #0000ff;"&gt;int</span> times1=60*Integer.parseInt(hour1)+<span style="color: #000000;"&gt;Integer.parseInt(mininute1);

            String hour2</span>=fromTime2.split(":")[0<span style="color: #000000;"&gt;].trim();
            String mininute2</span>=fromTime2.split(":")[1<span style="color: #000000;"&gt;].trim();
            </span><span style="color: #0000ff;"&gt;int</span> times2=60*Integer.parseInt(hour2)+<span style="color: #000000;"&gt;Integer.parseInt(mininute2);                
            </span><span style="color: #0000ff;"&gt;return</span> (times1 -<span style="color: #000000;"&gt; times2);                 
        }
    }); 

    </span><span style="color: #008000;"&gt;//</span><span style="color: #008000;"&gt;排序后</span>
    System.out.println("------------------排序后--------------------------"<span style="color: #000000;"&gt;);
    </span><span style="color: #0000ff;"&gt;for</span> (<span style="color: #0000ff;"&gt;int</span> i = 0; i < intervals.size(); i++<span style="color: #000000;"&gt;) {
        String id </span>=<span style="color: #000000;"&gt; intervals.get(i).toString();
        System.out.println(id);
    }
}</span></pre>

（编辑：李大同）

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