import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class Client {
public static void main(String[] args) {
//HashMap无序,TreeMap有序
Map<String, Object> map = new HashMap<String, Object>();
map.put("AR01", "hello");
map.put("AR02", 2017);
map.put("AR03", "world");
map.put("AR04", 1000);
List<Map<String, Object>> testList = new ArrayList<Map<String, Object>>();
testList.add(map);
for (Map<String, Object> m : testList) {
for (String k : m.keySet()) {
System.out.println(k + " : " + m.get(k));
}
}
}
}
二,获取当前年份
public static String getSysYear() {
Calendar date = Calendar.getInstance();
String year = String.valueOf(date.get(Calendar.YEAR));
return year;
}