a13341c3

package test;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;

public class Test {

public static void main(String[] args) {

List<String> list = new ArrayList<String>();

list.add("3");list.add("a1");list.add("a12");list.add("a13");list.add("a2");

list.add("a3");list.add("c1");list.add("b2");list.add("d1");

list.add("b1");list.add("c3");list.add("2");list.add("1");

System.out.println("排序前------>"+list);

Collections.sort(list, new Comparator<String>() {

String regNum = "[d]";//数字字符

String regStr = "[^d]";//非数字字符

@Override

public int compare(String o1, String o2) {

int num1 = Integer.parseInt(o1.replaceAll(regStr, ""));

int num2 = Integer.parseInt(o2.replaceAll(regStr, ""));

String str1 = o1.replaceAll(regNum, "");

String str2 = o2.replaceAll(regNum, "");

//都有字母

if( ! isnull(str1) && ! isnull(str2)){

if(str1.compareTo(str2) > 0){

return 1;

}else if(str1.compareTo(str2) < 0){

return -1;

}else{

return num1-num2;

}

}else{//存在数字

//都是数字

if(isnull(str1) && isnull(str2)){

return num1 - num2;

}else if(isnull(str1) && ! isnull(str2)){//数字排前面：o1是数字，o2不是数字

return -1;

}else if(! isnull(str1) && isnull(str2)){//数字排前面：o1不是数字，o2是数字

return 1;

}else{

return 0;

}

}

}

});

System.out.println("排序后======>"+list);

}

private static boolean isnull(String str){

return str == null || str.trim().length() == 0;

}

}