范例：
| package com.wef.util; import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.text.Collator;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Locale; import org.josql.Query;
import org.josql.QueryExecutionException;
import org.josql.QueryParseException;
import org.josql.QueryResults; public class CommonSort {
public static <T> void sortListChina(final List<T> lists,String sortName){
if(lists==null||lists.size()<=0){
return;
}
Field[] declaredFields = lists.get(0).getClass().getDeclaredFields();
String sortField="get";
boolean isExist=false;
for (Field field : declaredFields) {
String fieldName = field.getName();
if(fieldName.equalsIgnoreCase(sortName)){
isExist=true;
sortField+=fieldName.substring(0,1).toUpperCase()+fieldName.substring(1);
}
}
if(!isExist){
throw new RuntimeException("排序字段不存在");
}
final String tempField=sortField;
Collections.sort(lists,new Comparator<Object>(){
Collator collator = Collator.getInstance(Locale.CHINA);
@Override
@SuppressWarnings("unchecked")
public int compare(Object o1, Object o2) {
// TODO Auto-generated method stub
T t1 = (T) o1;
T t2 = (T) o2;
Method method1,method2;
String name1="",name2="";
try {
method1 = t1.getClass().getMethod(tempField, null);
method2 = t2.getClass().getMethod(tempField, null);
name1 = (String) method1.invoke(t1, null);
name2 = (String) method2.invoke(t2, null);
} catch (Exception e) {
e.printStackTrace();
}
if (name1 == null || name2 == null) {
return -1;
}
int flag=collator.compare(name1, name2);
return flag;
}
});
}
/**
* 内存数据排序 使用JoSQL
* @param list
* @param orderByString a asc,b desc
* @return
*/
public static<T> List<T> sortList(List<T> list, String orderByString) {
String josql = " select * from " + list.get(0).getClass().getName() + " order by "+ orderByString;
Query query = new Query();
try {
query.parse(josql);
QueryResults results = query.execute(list);
list = results.getResults();
} catch (QueryParseException e) {
e.printStackTrace();
} catch (QueryExecutionException e) {
e.printStackTrace();
}
return list;
}
} |
转载于:https://my.oschina.net/u/3040777/blog/1625173
