java List中对象多属性排序及各属性排序设置

package com.csr.framework.service.sys; import java.lang.reflect.Field; import java.lang.reflect.Method; import java.sql.Timestamp; import java.util.Collections; import java.util.Comparator; import java.util.Date; import java.util.List; import java.util.Map; import org.apache.commons.beanutils.BeanComparator; import com.csr.framework.core.bean.Domain; import com.csr.framework.core.crud.Query.OrderType; public class SortListUtil<T extends Domain> { /** * 对List对象按照某个成员变量进行排序 * @param list List对象 * @param sortField 排序的属性名称 * @param sortMode 排序方式：ASC，DESC 任选其一 */ public static <T> void sortList(List<T> list, final String sortField, final String sortMode) { Collections.sort(list, new Comparator<T>() { @Override public int compare(T o1, T o2) { try { Class clazz = o1.getClass(); Field field = clazz.getDeclaredField(sortField); //获取成员变量 field.setAccessible(true); //设置成可访问状态 String typeName = field.getType().getName().toLowerCase(); //转换成小写 Object v1 = field.get(o1); //获取field的值 Object v2 = field.get(o2); //获取field的值 boolean ASC_order = (sortMode == null || "ASC".equalsIgnoreCase(sortMode)); //判断字段数据类型，并比较大小 if(typeName.endsWith("string")) { String value1 = ( v1 == null ? "" : v1.toString()); String value2 = ( v2 == null ? "" : v2.toString()); return ASC_order ? value1.compareTo(value2) : value2.compareTo(value1); } else if(typeName.endsWith("short")) { Short value1 = Short.parseShort(v1.toString()); Short value2 = Short.parseShort(v2.toString()); return ASC_order ? value1.compareTo(value2) : value2.compareTo(value1); } else if(typeName.endsWith("byte")) { Byte value1 = Byte.parseByte(v1.toString()); Byte value2 = Byte.parseByte(v2.toString()); return ASC_order ? value1.compareTo(value2) : value2.compareTo(value1); } else if(typeName.endsWith("char")) { Integer value1 = (int)(v1.toString().charAt(0)); Integer value2 = (int)(v2.toString().charAt(0)); return ASC_order ? value1.compareTo(value2) : value2.compareTo(value1); } else if(typeName.endsWith("int") || typeName.endsWith("integer")) { Integer value1 = Integer.parseInt(v1.toString()); Integer value2 = Integer.parseInt(v2.toString()); return ASC_order ? value1.compareTo(value2) : value2.compareTo(value1); } else if(typeName.endsWith("long")) { Long value1 = Long.parseLong(v1.toString()); Long value2 = Long.parseLong(v2.toString()); return ASC_order ? value1.compareTo(value2) : value2.compareTo(value1); } else if(typeName.endsWith("float")) { Float value1 = Float.parseFloat(v1.toString()); Float value2 = Float.parseFloat(v2.toString()); return ASC_order ? value1.compareTo(value2) : value2.compareTo(value1); } else if(typeName.endsWith("double")) { Double value1 = Double.parseDouble(v1.toString()); Double value2 = Double.parseDouble(v2.toString()); return ASC_order ? value1.compareTo(value2) : value2.compareTo(value1); } else if(typeName.endsWith("boolean")) { Boolean value1 = Boolean.parseBoolean(v1.toString()); Boolean value2 = Boolean.parseBoolean(v2.toString()); return ASC_order ? value1.compareTo(value2) : value2.compareTo(value1); } else if(typeName.endsWith("date")) { Date value1 = (Date)(v1); Date value2 = (Date)(v2); return ASC_order ? value1.compareTo(value2) : value2.compareTo(value1); } else if(typeName.endsWith("timestamp")) { Timestamp value1 = (Timestamp)(v1); Timestamp value2 = (Timestamp)(v2); return ASC_order ? value1.compareTo(value2) : value2.compareTo(value1); } else { //调用对象的compareTo()方法比较大小 Method method = field.getType().getDeclaredMethod("compareTo", new Class[]{field.getType()}); method.setAccessible(true); //设置可访问权限 int result = (Integer)method.invoke(v1, new Object[]{v2}); return ASC_order ? result : result*(-1); } } catch (Exception e) { String err = e.getLocalizedMessage(); System.out.println(err); e.printStackTrace(); } return 0; //未知类型，无法比较大小 } }); } /** 　　*List元素的多个属性进行排序。 　　*name属性排序，name相同的元素按age属性排序。 　　* 　　*@paramlist　　　包含要排序元素的List 　　*@paramproperties要排序的属性。前面的值优先级高。 　　*/ /* public static<T> void sortListMulti(List<T>list,final String...properties){ Collections.sort(list , new Comparator<T>(){ @Override public int compare(T o1, T o2) { if ( o1 == null && o2 == null ) return 0; if ( o1 == null ) return -1; if ( o2 == null ) return 1; Class clazz = o1.getClass(); for ( String property : properties ){ Comparator c = new BeanComparator(property); try { Field field = clazz.getDeclaredField(property); field.setAccessible(true); //设置成可访问状态 String typeName = field.getType().getName().toLowerCase(); //转换成小写 Object v1 = field.get(o1); //获取field的值 Object v2 = field.get(o2); //获取field的值 if ( v1 == null ) field.set(o1, ""); if ( v2 == null ) field.set(o2, ""); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } int result = c.compare(o1, o2); if ( result != 0 ) return result; } return 0; } }); }*/ public static<T> void sortListMulti(List<T>list,final Map<String,OrderType> fieldMap){ Collections.sort(list , new Comparator<T>(){ @Override public int compare(T o1, T o2) { if ( o1 == null && o2 == null ) return 0; if ( fieldMap.isEmpty() ) return 0; Class clazz = o1.getClass(); for ( String property : fieldMap.keySet() ){ Comparator c = new BeanComparator(property); try { Field field = clazz.getDeclaredField(property); field.setAccessible(true); //设置成可访问状态 String typeName = field.get