java字符串排序（数字，字母，汉字等组合排序）package cnnho.backstage.utils;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;
import st.User;
import cnnho.backstage.vo.file.OriginalFileModel;
public class StringComparatorUtils implements Comparator<User>{
private String str1, str2;
private int pos1, pos2, len1, len2;
public int compare(Users1, Users2)
{
str1 = s1.getName();
str2 = s2.getName();
len1 = str1.length();
len2 = str2.length();
pos1 = pos2 = 0;
int result = 0;
while (result == 0 && pos1 < len1 && pos2 < len2)
{
char ch1 = str1.charAt(pos1);
char ch2 = str2.charAt(pos2);
if (Character.isDigit(ch1))
{
result = Character.isDigit(ch2) ? compareNumbers() : -1;
}
else if (Character.isLetter(ch1))
{
result = Character.isLetter(ch2) ? compareOther(true) : 1;
}
else
{
result = Character.isDigit(ch2) ? 1
: Character.isLetter(ch2) ? -1
: compareOther(false);
}
pos1++;
pos2++;
}
return result == 0 ? len1 - len2 : result;
}
private int compareNumbers()
{
int end1 = pos1 + 1;
while (end1 < len1 && Character.isDigit(str1.charAt(end1)))
{
end1++;
}
int fullLen1 = end1 - pos1;
while (pos1 < end1 && str1.charAt(pos1) == '0')
{
pos1++;
}
int end2 = pos2 + 1;
while (end2 < len2 && Character.isDigit(str2.charAt(end2)))
{
end2++;
}
int fullLen2 = end2 - pos2;
while (pos2 < end2 && str2.charAt(pos2) == '0') {
pos2++;
}
int delta = (end1 - pos1) - (end2 - pos2);
if (delta != 0)
{
return delta;
}
while (pos1 < end1 && pos2 < end2)
{
delta = str1.charAt(pos1++) - str2.charAt(pos2++); if (delta != 0)
{
return delta;
}
}
pos1--;
pos2--;
return fullLen2 - fullLen1;
}
private int compareOther(boolean isLetters)
{
char ch1 = str1.charAt(pos1);
char ch2 = str2.charAt(pos2);
if (ch1 == ch2)
{java集合排序怎么实现
return 0;
}
if (isLetters)
{
ch1 = UpperCase(ch1);
ch2 = UpperCase(ch2);
if (ch1 != ch2)
{
ch1 = LowerCase(ch1);
ch2 = LowerCase(ch2);
}
}
return ch1 - ch2;
}
public static void main(String[] args) {
//list集合
// List<User> list = new ArrayList<User>();
// User user = new User();
// user.setName("1.jpg");
// user.setAge("12");
// User user1 = new User();
// user1.setName("10.jpg");
// user1.setAge("13");
// User user2 = new User();
/
/ user2.setName("2.jpg");
// user2.setAge("14");
// User user3 = new User();
// user3.setName("2a2.jpg");
// user3.setAge("15");
// list.add(user);
// list.add(user1);
// list.add(user2);
// list.add(user3);
// List<User> result = list.stream().sorted(new StringComparatorUtils()).List()); //
//
/
/ Collections.sort(list,new StringComparatorUtils());
// for(int i = 0;i < result.size();i++){
// System.out.(i).getName().toString());
// }
//数组
// String arr[] = {"1.jpg", "12.jpg", "10.jpg", "2.jpg", "2abc.jpg","a2bc.jpg","a1bc.jpg"};
//
// Arrays.sort(arr, new StringComparatorUtils());
// for(int i=0;i<arr.length;i++){
// System.out.println(arr[i]);
// }
}
}

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