List排序共通代碼
阿新 • • 發佈:2017-11-07
list排序 java fin cef ack cti warnings invoke ktr
此共通方法可以根據特定字段進行排序
package com.gomecar.index.common.utils; import java.lang.reflect.Method; import java.util.Collections; import java.util.Comparator; import java.util.List; /** * 對List中數據根據某個字段進行排序 * Created by xiaotian on 2017/3/20. */ public class ListSortUtil<T> { /** * @param targetList 目標排序List *@param sortField 排序字段(實體類屬性名) * @param sortMode 排序方式(asc or desc) */ @SuppressWarnings({ "unchecked", "rawtypes" }) public void sort(List<T> targetList, final String sortField, final String sortMode) { Collections.sort(targetList, new Comparator() { publicint compare(Object obj1, Object obj2) { int retVal = 0; try { //首字母轉大寫 String newStr=sortField.substring(0, 1).toUpperCase()+sortField.replaceFirst("\\w",""); String methodStr="get"+newStr; Method method1= ((T)obj1).getClass().getMethod(methodStr, null); Method method2 = ((T)obj2).getClass().getMethod(methodStr, null); if (sortMode != null && "desc".equals(sortMode)) { retVal = method2.invoke(((T) obj2), null).toString().compareTo(method1.invoke(((T) obj1), null).toString()); // 倒序 } else { retVal = method1.invoke(((T) obj1), null).toString().compareTo(method2.invoke(((T) obj2), null).toString()); // 正序 } } catch (Exception e) { e.printStackTrace(); //throw new RuntimeException(); } return retVal; } }); } }
List排序共通代碼