1 package com.chinfotech.common.util; 2 import java.util.ArrayList; 3 import java.util.Collections; 4 import java.util.Comparator; 5 import java.util.LinkedHashMap; 6 import java.util.List; 7 import java.util.Map; 8 9 import org.apache.commons.beanutils.BeanComparator; 10 import org.apache.commons.collections.ComparatorUtils; 11 import org.apache.commons.collections.comparators.ComparableComparator; 12 import org.apache.commons.collections.comparators.ComparatorChain; 13 import org.apache.commons.collections.comparators.NullComparator; 14 15 import com.chinfotech.scenicManage.bean.SaleTim; 16 /** 17 * 18 * @author gaomengqin 19 * 将bean封装成list后按照某一字段排序 20 * 21 */ 22 23 public class ListSort { 24 25 /** 26 * bean的某一个属性 27 * @param list:列表名称 28 * @param filedName:属性名称 29 * @param ascFlag:true;升序;false:降序 30 */ 31 @SuppressWarnings("unchecked") 32 public static void sort(List list, String filedName, boolean ascFlag) { 33 34 if (list.size() == 0 || filedName.equals("")) { 35 return; 36 } 37 Comparator cmp = ComparableComparator.getInstance(); 38 // 判断升序还是降序 39 if (ascFlag) { 40 cmp = ComparatorUtils.nullLowComparator(cmp); 41 } else { 42 cmp = ComparatorUtils.reversedComparator(cmp); 43 44 } 45 Collections.sort(list, new BeanComparator(filedName, cmp)); 46 } 47 48 /** 49 * bean根据某几个属性排序 50 * @param beans 51 * @param sortParam 52 */ 53 @SuppressWarnings({ "rawtypes", "unchecked" }) 54 public static void sortExecute(List beans, Map sortParam) { 55 56 // 判断beans和排序规则是否有内容 57 if (beans.size() == 0 || sortParam.keySet().size() == 0) { 58 return; 59 } 60 61 // 判断beans和排序规则是否有内容 62 if (beans.isEmpty() || sortParam.isEmpty()) { 63 return; 64 } 65 ComparatorChain comparator = new ComparatorChain(); 66 boolean sortMethod = false; 67 for (String itemName : sortParam.keySet()) { 68 sortMethod = false; 69 if ("desc".equals(sortParam.get(itemName))) { 70 sortMethod = true; 71 } 72 comparator.addComparator(new BeanComparator(itemName, new NullComparator()), sortMethod); 73 } 74 Collections.sort(beans, comparator); 75 } 76 77 public static void main(String[] args) 78 { 79 // TODO Auto-generated method stub 80 81 //１、单纯的列表为例 82 ArrayList lst = new ArrayList(); 83 lst.add("00000000001"); 84 lst.add("00000000002"); 85 lst.add("00000000003"); 86 lst.add("00000000004"); 87 lst.add("00000000005"); 88 //单纯调用升序，无需改写方法 89 Collections.sort(lst); 90 System.out.println(lst.toString()); 91 //单纯调用降序，无需改写方法 92 Collections.reverse(lst); 93 System.out.println(lst.toString()); 94 //２、List beans 为例 95 List list = new ArrayList (); 96 SaleTim sb; 97 sb = new SaleTim(); 98 sb.setCheck("1006"); 99 sb.setSale("3456");100 sb.setTime("18:00");101 list.add(sb);102 103 sb = new SaleTim();104 sb.setCheck("2378");105 sb.setSale("1265");106 sb.setTime("17:00");107 list.add(sb);108 109 sb = new SaleTim();110 sb.setCheck("1026");111 sb.setSale("2390");112 sb.setTime("19:30");113 list.add(sb);114 115 sb = new SaleTim();116 sb.setCheck("2900");117 sb.setSale("1089");118 sb.setTime("15:30");119 list.add(sb);120 121 122 sb = new SaleTim();123 sb.setCheck("2000");124 sb.setSale("3678");125 sb.setTime("16:30");126 list.add(sb);127 128 sb = new SaleTim();129 sb.setCheck("4500");130 sb.setSale("4000");131 sb.setTime("17:30");132 list.add(sb);133 System.out.println("***********原序*************");134 //原序135 for(SaleTim item : list){136 System.out.print(item.getCheck()+" ");137 System.out.print(item.getSale()+" ");138 System.out.println(item.getTime());139 }140 141 //降順142 System.out.println("***********check:降序*************");143 ListSort.sort(list, "check", false);144 for(SaleTim item : list){145 System.out.print(item.getCheck()+" ");146 System.out.print(item.getSale()+" ");147 System.out.println(item.getTime());148 }149 //昇順150 System.out.println("***********check:升序*************");151 ListSort.sort(list, "check", true);152 for(SaleTim item : list){153 System.out.print(item.getCheck()+" ");154 System.out.print(item.getSale()+" ");155 System.out.println(item.getTime());156 }157 //昇順158 System.out.println("***********time:升序*************");159 ListSort.sort(list, "time", true);160 for(SaleTim item : list){161 System.out.print(item.getCheck()+" ");162 System.out.print(item.getSale()+" ");163 System.out.println(item.getTime());164 }165 //降順166 System.out.println("***********time:降序*************");167 ListSort.sort(list, "time", false);168 for(SaleTim item : list){169 System.out.print(item.getCheck()+" ");170 System.out.print(item.getSale()+" ");171 System.out.println(item.getTime());172 }173 System.out.println("***********check：升序 time：降序*************");174 //３、LIST beans 多个属性叠加排序175 Map sortParam = new LinkedHashMap ();176 //check：昇順 time：降順177 sortParam.put("check", "asc");178 sortParam.put("time", "desc");179 ListSort.sortExecute(list, sortParam);180 181 for(SaleTim item : list){182 System.out.print(item.getCheck()+" ");183 System.out.print(item.getSale()+" ");184 System.out.println(item.getTime());185 }186 sortParam.clear();187 //check：昇順 time：昇順188 sortParam.put("check", "desc");189 sortParam.put("time", "asc");190 ListSort.sortExecute(list, sortParam);191 System.out.println("***********check：降順 time：昇順*************");192 for(SaleTim item : list){193 System.out.print(item.getCheck()+" ");194 System.out.print(item.getSale()+" ");195 System.out.println(item.getTime());196 }197 }198 }