package com.fh.util; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.commons.beanutils.BeanComparator; import org.apache.commons.collections.ComparatorUtils; import org.apache.commons.collections.comparators.ComparableComparator; import org.apache.commons.collections.comparators.ComparatorChain; public class SortUtil { public static void main(String[] args) { System.out.println(testMapSort()); } /** * 对list进行排序 * @param sortList 需要排序的list * @param param1 排序的参数名称 * @param orderType 排序类型:正序-asc;倒序-desc */ public static List sort(List sortList, String param1, String orderType){ Comparator mycmp1 = ComparableComparator.getInstance (); if("desc".equals(orderType)){ mycmp1 = ComparatorUtils. reversedComparator(mycmp1); //逆序(默认为正序) } ArrayList<Object> sortFields = new ArrayList<Object>(); sortFields.add( new BeanComparator(param1 , mycmp1)); //主排序(第一排序) ComparatorChain multiSort = new ComparatorChain(sortFields); Collections.sort (sortList , multiSort); return sortList; } /** * 对list进行排序 * @param sortList 需要排序的list * @param param1 排序的参数名称:参数长度 * @param param2 排序的参数名称:排序参数 * @param orderType 排序类型:正序-asc;倒序-desc */ public static List sortParam2(List sortList, String param1,String param2, String orderType){ Comparator mycmp1 = ComparableComparator.getInstance (); Comparator mycmp2 = ComparableComparator.getInstance (); if("desc".equals(orderType)){ mycmp1 = ComparatorUtils. reversedComparator(mycmp1); //逆序(默认为正序) } ArrayList<Object> sortFields = new ArrayList<Object>(); sortFields.add( new BeanComparator(param1 , mycmp1)); //主排序(第一排序) sortFields.add( new BeanComparator(param2 , mycmp2)); //主排序(第一排序) ComparatorChain multiSort = new ComparatorChain(sortFields); Collections.sort (sortList , multiSort); return sortList; } public static List testMapSort(){ List sortList = new ArrayList(); Map map = new HashMap(); map.put("name", "1"); map.put("age", "1"); Map map2 = new HashMap(); map2.put("name", "2"); map2.put("age", "13"); Map map1 = new HashMap(); map1.put("name", "2"); map1.put("age", "12"); List list = new ArrayList(); list.add(map); list.add(map1); list.add(map2); //return sort(list, "age", "asc"); return sortParam2(list, "name", "age", "asc"); } }
时间: 2024-10-06 07:48:15