java实现按对象某个字段排序，排序字段和规则自定义

@SuppressWarnings({ "unchecked", "rawtypes" })
private <T> void sort(List<T> targetList, final String sortField, final String sortMode) {
Collections.sort(targetList, new Comparator() {
//匿名内部类，重写compare方法
@Override
public int compare(Object obj1, Object obj2) {
Class c = obj1.getClass();
Integer result = 0;
try {
Field field = c.getDeclaredField(sortField);
String classType = field.getType().getSimpleName();
Method method = null;
if (BIGDECIMAL.equals(classType)) {
method = c.getMethod("get" + sortField.substring(0, 1).toUpperCase() + sortField.substring(1), new Class[]{});
if (BizConstants.DESC.equalsIgnoreCase(sortMode)) {
result = ((BigDecimal) method.invoke(obj2)).compareTo((BigDecimal) method.invoke(obj1));
} else if (BizConstants.DESC.equalsIgnoreCase(sortMode)) {
result = ((BigDecimal) method.invoke(obj1)).compareTo((BigDecimal) method.invoke(obj2));
}
} else {
result = -100;
throw new RuntimeException("暂不支持其它类型字段排序,如有需要请自己添加.");
}
} catch (Exception e) {
e.printStackTrace();
}
return result > 0 ? 1 : result < 0 ? -1 : 0;
}
});
}