支持时间、数字、中英文数据排序数据结构是List<Map<String,String>> 例子 标题 价格 时间
android 电子书 200 2020-12-22
iPhone电子书 220 2020-12-22 给我的提示
List<Map<String,String>> list=new ArrayList<Map<String,String>>();
Map<String,String> map=new HashMap<String,String>();
map.put("time","2012-2-1");
map.put("price","203");
map.put("title","J2EE电子书 ");
list.add(map);
android 电子书 200 2020-12-22
iPhone电子书 220 2020-12-22 给我的提示
List<Map<String,String>> list=new ArrayList<Map<String,String>>();
Map<String,String> map=new HashMap<String,String>();
map.put("time","2012-2-1");
map.put("price","203");
map.put("title","J2EE电子书 ");
list.add(map);
{
public static void main(String[] args)
{
List<Map<String, String>> list = new ArrayList<Map<String, String>>();
Map<String, String> map = new HashMap<String, String>();
map.put("time", "2012-2-1");
map.put("price", "203");
map.put("title", "J2EE ebook ");
list.add(map);
Map<String, String> map1 = new HashMap<String, String>();
map1.put("time", "2012-3-1");
map1.put("price", "103");
map1.put("title", "think in java ");
list.add(map1);
HashMap<String, String>[] maps = new HashMap[list.size()];
list.toArray(maps);
System.out.println("sort by time:");
sort(maps, "time");
printMaps(maps);
System.out.println("\nsort by price:");
sort(maps, "price");
printMaps(maps);
System.out.println("\nsort by title:");
sort(maps, "title");
printMaps(maps);
}
public static void printMaps(HashMap<String, String>[] maps )
{
for(HashMap<String, String> map:maps)
{
System.out.println(map.get("time")+"\t"+map.get("price")+"\t"+map.get("title"));
}
}
public static void sort(HashMap<String, String>[] maps,final String key)
{
Arrays.sort(maps,new Comparator<HashMap<String,String>>(){
public int compare(HashMap<String, String> o1,
HashMap<String, String> o2)
{
//利用比较hashcode来排序不太准确,实际应用中要分析的更详细点
return o1.get(key).hashCode()-o2.get(key).hashCode();
}
});
}
}