1,实际应用:

Java代码  

1. List<OrderInfoBean> orderInfoBeans = commitOrderDto.getValue();  
2.         SortList<OrderInfoBean> sortList = new SortList<OrderInfoBean>();  
3.         sortList.Sort(orderInfoBeans, "getCreateTime", "desc");  

2,工具类sortList源码

Java代码  

1. package com.gov.util;  
2.   
3. import java.lang.reflect.InvocationTargetException;  
4. import java.lang.reflect.Method;  
5. import java.util.Collections;  
6. import java.util.Comparator;  
7. import java.util.List;  
8.   
9. /*** 
10.  * 用户排序 
11.  * @author huangwei 
12.  * 2015年7月1日 
13.  * @param <E> 
14.  */  
15. public class SortList<E> {  
16.     public void Sort(List<E> list, final String method, final String sort) {  
17.         Collections.sort(list, new Comparator() {  
18.             public int compare(Object a, Object b) {  
19.                 int ret = 0;  
20.                 try {  
21.                     Method m1 = ((E) a).getClass().getMethod(method, null);  
22.                     Method m2 = ((E) b).getClass().getMethod(method, null);  
23.                     if (sort != null && "desc".equals(sort))// 倒序  
24.                         ret = m2.invoke(((E) b), null).toString()  
25.                                 .compareTo(m1.invoke(((E) a), null).toString());  
26.                     else  
27.                         // 正序  
28.                         ret = m1.invoke(((E) a), null).toString()  
29.                                 .compareTo(m2.invoke(((E) b), null).toString());  
30.                 } catch (NoSuchMethodException ne) {  
31.                     System.out.println(ne);  
32.                 } catch (IllegalAccessException ie) {  
33.                     System.out.println(ie);  
34.                 } catch (InvocationTargetException it) {  
35.                     System.out.println(it);  
36.                 }  
37.                 return ret;  
38.             }  
39.         });  
40.     }  
41. }  

另外一种排序方式

实例:

Java代码  

1. List<CommonDictionary>list= DictionaryParam.getList("ptype");  
2.               
3.         Collections.sort(list,new SystemHWUtil. ListComparator(true,"value"));  
4.         model.addAttribute("commonDictionaries", list);  

 说明:list的类型是ArrayList;

按照list中的元素(CommonDictionary对象)的成员变量value进行排序

SystemHWUtil. ListComparator的源代码:

Java代码  

1. public static class ListComparator implements Comparator{  
2.         /*** 
3.          * 是否转化为Int之后再比较 
4.          */  
5.         private boolean isConvertInteger;  
6.         /*** 
7.          * 对哪个列进行排序 
8.          */  
9.         private String comparedProperty;  
10.         public ListComparator(boolean isConvertInteger,String comparedProperty) {  
11.             super();  
12.             this.isConvertInteger = isConvertInteger;  
13.             this.comparedProperty=comparedProperty;  
14.         }  
15.         public int compare(Object o1, Object o2) {  
16.             if(null!=o1&&null!=o2)  
17.             {  
18.                 try {  
19.                     Object obj1=ReflectHWUtils.getObjectValue(o1, comparedProperty);  
20.                     Object obj2=ReflectHWUtils.getObjectValue(o2, comparedProperty);  
21.                     if(isConvertInteger){  
22.                         int num1;  
23.                         int num2;  
24.                         if(obj1 instanceof Integer){  
25.                             num1=(Integer)obj1;  
26.                             num2=(Integer)obj2;  
27.                         }else{  
28.                             num1=Integer.parseInt(obj1.toString());  
29.                             num2=Integer.parseInt(obj2.toString());  
30.                         }  
31.                         if(num1>num2){  
32.                             return 1;  
33.                         }else if(num1<num2){  
34.                             return -1;  
35.                         }else{  
36.                             return 0;  
37.                         }  
38.                     }else{  
39.                         return obj1.toString().compareTo(obj2.toString());  
40.                     }  
41.                 } catch (SecurityException e) {  
42.                     e.printStackTrace();  
43.                 } catch (NoSuchFieldException e) {  
44.                     e.printStackTrace();  
45.                 } catch (IllegalArgumentException e) {  
46.                     e.printStackTrace();  
47.                 } catch (IllegalAccessException e) {  
48.                     e.printStackTrace();  
49.                 }  
50.             }  
51.             return 0/*等于*/;  
52.         }  
53.     }  

附录:

Java代码  

1. public static class ArrayListComparator implements Comparator{  
2.         /*** 
3.          * 排序的依据 
4.          */  
5.         private String titles[];  
6.         /*** 
7.          * 对哪个列进行排序 
8.          */  
9.         private String comparedProperty;  
10.           
11.         public ArrayListComparator(String[] titles,String comparedProperty) {  
12.             super();  
13.             this.titles = titles;  
14.             this.comparedProperty=comparedProperty;  
15.         }  
16.   
17.         public int compare(Object o1, Object o2) {  
18.             if(null!=o1&&null!=o2)  
19.             {  
20.                   
21.                 try {  
22.                     if(SystemHWUtil.indexOfArr(titles,(String)ReflectHWUtils.getObjectValue(o1, comparedProperty)   ) >  
23.                     SystemHWUtil.indexOfArr(titles,(String)ReflectHWUtils.getObjectValue(o2, comparedProperty))){  
24.                         return 1/*大于*/;  
25.                     }else {  
26.                         return -1/*小于*/;  
27.                     }  
28.                 } catch (SecurityException e) {  
29.                     e.printStackTrace();  
30.                 } catch (NoSuchFieldException e) {  
31.                     e.printStackTrace();  
32.                 } catch (IllegalArgumentException e) {  
33.                     e.printStackTrace();  
34.                 } catch (IllegalAccessException e) {  
35.                     e.printStackTrace();  
36.                 }  
37.             }  
38.             return 0/*等于*/;  
39.         }  
40.           
41.     }