package com.fms.util;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* * [简述]:List通用排序工具类
* * User: zr
* * Date:2019/4/17
* * Time:10:24
* * To change this template use File | Settings | File Templates.
*/
public class ListSortUtil {
private static final String SORT_ASC = "asc";
private static final String SORT_DESC = "desc";
/**
* [简述]： 对List数组排序
*
* @param list 源数据 排序集合
* @param sort 升序 还是 降序，默认升序
* @return List
*/
public static List<?> sort(List<?> list, final String sort) {
Collections.sort(list, new Comparator<Object>() {
@Override
public int compare(Object o1, Object o2) {
int ret = 0;
if (o1 instanceof Integer) {
ret = ((Integer) o1).compareTo((Integer) o2);
} else if (o1 instanceof Double) {
ret = ((Double) o1).compareTo((Double) o2);
} else if (o1 instanceof Long) {
ret = ((Long) o1).compareTo((Long) o2);
} else if (o1 instanceof Float) {
ret = ((Float) o1).compareTo((Float) o2);
} else if (o1 instanceof Date) {
ret = ((Date) o1).compareTo((Date) o2);
} else if (isDouble(String.valueOf(o1)) && isDouble(String.valueOf(o2))) {
ret = (new Double(o1.toString())).compareTo(new Double(o2.toString()));
} else {
ret = String.valueOf(o1).compareTo(String.valueOf(o2));
}
if (null != sort && SORT_DESC.equalsIgnoreCase(sort)) {
return -ret;
} else {
return ret;
}
}
});
return list;
}
/**
* [简述]: List 泛型 排序
*
* @param list 源数据 排序集合
* @param field 排序的数据字段名称
* @param sort 升序 还是 降序，默认升序
* @param <T> 泛型T
* @return List
*/
public static <T> List<T> sort(List<T> list, final String field, final String sort) {
Collections.sort(list, new Comparator<T>() {
@Override
public int compare(T o1, T o2) {
int ret = 0;
try {
Method method1 = o1.getClass().getDeclaredMethod(getMethodName(field), null);
Method method2 = o2.getClass().getDeclaredMethod(getMethodName(field), null);
Field field1 = o1.getClass().getDeclaredField(field);
field1.setAccessible(true);
Class<?> type = field1.getType();
if (type == int.class) {
ret = ((Integer) field1.getInt(o1)).compareTo((Integer) field1.getInt(o2));
} else if (type == double.class) {
ret = ((Double) field1.getDouble(o1)).compareTo((Double) field1.getDouble(o2));
} else if (type == long.class) {
ret = ((Long) field1.getLong(o1)).compareTo((Long) field1.getLong(o2));
} else if (type == float.class) {
ret = ((Float) field1.getFloat(o1)).compareTo((Float) field1.getFloat(o2));
} else if (type == Date.class) {
ret = ((Date) field1.get(o1)).compareTo((Date) field1.get(o2));
} else if (isDouble(String.valueOf(field1.get(o1))) && isDouble(String.valueOf(field1.get(o2)))) {
ret = (new Double(method1.invoke(o1).toString())).compareTo(new Double(method2.invoke(o2).toString()));
} else {
ret = String.valueOf(field1.get(o1)).compareTo(String.valueOf(field1.get(o2)));
}
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
if (null != sort && SORT_DESC.equalsIgnoreCase(sort)) {
return -ret;
} else {
return ret;
}
}
});
return list;
}
private static boolean isDouble(String str) {
boolean flag = false;
if (isInteger(str) || isFloat(str)) {
flag = true;
}
return flag;
}
private static boolean isInteger(String str) {
Matcher matcher = Pattern.compile("^[+-]?[0-9]+$").matcher(str);
return matcher.find();
}
private static boolean isFloat(String str) {
return str.matches("[\\d]+\\.[\\d]+");
}
/**
* [简述]: List 泛型 排序
*
* @param list 源数据 排序集合
* @param fields 排序的数据字段名称
* @param sorts 升序 还是 降序
* @param <T> 泛型T
* @return List
*/
public static <T> List<T> sort(List<T> list, final String[] fields, final String[] sorts) {
if (null != fields && fields.length > 0) {
for (int index = 0; index < fields.length; index++) {
String sortRule = SORT_ASC;
if (null != sorts && sorts.length >= index && null != sorts[index]) {
sortRule = sorts[index];
}
final String sort = sortRule;
final String field = fields[index];
Collections.sort(list, new Comparator<T>() {
@Override
public int compare(T o1, T o2) {
int ret = 0;
try {
Method method1 = o1.getClass().getDeclaredMethod(getMethodName(field), null);
Method method2 = o1.getClass().getDeclaredMethod(getMethodName(field), null);
Field field1 = o1.getClass().getDeclaredField(field);
field1.setAccessible(true);
Class<?> type = field1.getType();
if (type == int.class) {
ret = ((Integer) field1.getInt(o1)).compareTo((Integer) field1.getInt(o2));
} else if (type == double.class) {
ret = ((Double) field1.getDouble(o1)).compareTo((Double) field1.getDouble(o2));
} else if (type == long.class) {
ret = ((Long) field1.getLong(o1)).compareTo((Long) field1.getLong(o2));
} else if (type == float.class) {
ret = ((Float) field1.getFloat(o1)).compareTo((Float) field1.getFloat(o2));
} else if (type == Date.class) {
ret = ((Date) field1.get(o1)).compareTo((Date) field1.get(o2));
} else if (isDouble(String.valueOf(field1.get(o1))) && isDouble(String.valueOf(field1.get(o2)))) {
ret = (new Double(method1.invoke(o1).toString())).compareTo(new Double(method2.invoke(o2).toString()));
} else {
ret = String.valueOf(field1.get(o1)).compareTo(String.valueOf(field1.get(o2)));
}
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
if (null != sort && SORT_DESC.equalsIgnoreCase(sort)) {
return -ret;
} else {
return ret;
}
}
});
}
}
return list;
}
private static String getMethodName(String str) {
StringBuffer name = new StringBuffer();
name = name.append("get").append(firstLetterToCapture(str));
return name.toString();
}
private static String firstLetterToCapture(String name) {
char[] arr = name.toCharArray();
arr[0] -= 32;
return String.valueOf(arr);
}
}
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