java创建字母自增的方法

前言：不知咋的脑袋抽筋的想到数字可以直接自增成序列要是字母呢该怎么增加 aaa aab aac aad aae aaf aag aah aai aaj aak？？于是就有了下面的代码

要是大神们有简介的方法请不吝赐教；

package com.example.example1.web;

public class test1 {
    public static void main(String[] args) {
        String a="aaa";
        for (int i=1;i<26*26*26+1;i++){
            System.out.print(a+" ");
            a=createNext(a);
            if (i%26==0){
                System.out.println();
            }
        }
    }

    public static String createNext(String string){
        char [] tempChar = string.toCharArray();
        for(int i =tempChar.length-1;i>=1;i--){
            if (tempChar[i]<'z' ){
                tempChar[i]=(char)(tempChar[i]+1);
                break;
            }else {
                tempChar[i]='a';
                tempChar[i-1]=(char)(tempChar[i-1]+1);
                if (tempChar[i-1]<='z'){
                    i=0;
                }
            }
        }
        return String.valueOf(tempChar);
    }

}

结果集如下

"C:\Program Files\Java\jdk1.8.0_112\bin\java.exe" -javaagent:E:\SoftWore\ideaIU-2018.2\IntelliJ_IDEA_2018.2\lib\idea_rt.jar=59615:E:\SoftWore\ideaIU-2018.2\IntelliJ_IDEA_2018.2\bin -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_112\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_112\jre\lib\rt.jar;E:\All_SoftWore_WorkSpace\ideaIU-2018.2WorkSpace\example1\target\classes;C:\Users\Lenovo\.m2\repository\org\springframework\boot\spring-boot-starter-data-jpa\2.0.4.RELEASE\spring-boot-starter-data-jpa-2.0.4.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\boot\spring-boot-starter\2.0.4.RELEASE\spring-boot-starter-2.0.4.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\boot\spring-boot\2.0.4.RELEASE\spring-boot-2.0.4.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\2.0.4.RELEASE\spring-boot-autoconfigure-2.0.4.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\boot\spring-boot-starter-logging\2.0.4.RELEASE\spring-boot-starter-logging-2.0.4.RELEASE.jar;C:\Users\Lenovo\.m2\repository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;C:\Users\Lenovo\.m2\repository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;C:\Users\Lenovo\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.10.0\log4j-to-slf4j-2.10.0.jar;C:\Users\Lenovo\.m2\repository\org\apache\logging\log4j\log4j-api\2.10.0\log4j-api-2.10.0.jar;C:\Users\Lenovo\.m2\repository\org\slf4j\jul-to-slf4j\1.7.25\jul-to-slf4j-1.7.25.jar;C:\Users\Lenovo\.m2\repository\javax\annotation\javax.annotation-api\1.3.2\javax.annotation-api-1.3.2.jar;C:\Users\Lenovo\.m2\repository\org\yaml\snakeyaml\1.19\snakeyaml-1.19.jar;C:\Users\Lenovo\.m2\repository\org\springframework\boot\spring-boot-starter-aop\2.0.4.RELEASE\spring-boot-starter-aop-2.0.4.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\spring-aop\5.0.8.RELEASE\spring-aop-5.0.8.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\aspectj\aspectjweaver\1.8.13\aspectjweaver-1.8.13.jar;C:\Users\Lenovo\.m2\repository\org\springframework\boot\spring-boot-starter-jdbc\2.0.4.RELEASE\spring-boot-starter-jdbc-2.0.4.RELEASE.jar;C:\Users\Lenovo\.m2\repository\com\zaxxer\HikariCP\2.7.9\HikariCP-2.7.9.jar;C:\Users\Lenovo\.m2\repository\org\springframework\spring-jdbc\5.0.8.RELEASE\spring-jdbc-5.0.8.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\hibernate\hibernate-core\5.2.17.Final\hibernate-core-5.2.17.Final.jar;C:\Users\Lenovo\.m2\repository\org\jboss\logging\jboss-logging\3.3.2.Final\jboss-logging-3.3.2.Final.jar;C:\Users\Lenovo\.m2\repository\org\hibernate\javax\persistence\hibernate-jpa-2.1-api\1.0.2.Final\hibernate-jpa-2.1-api-1.0.2.Final.jar;C:\Users\Lenovo\.m2\repository\org\javassist\javassist\3.22.0-GA\javassist-3.22.0-GA.jar;C:\Users\Lenovo\.m2\repository\antlr\antlr\2.7.7\antlr-2.7.7.jar;C:\Users\Lenovo\.m2\repository\org\jboss\jandex\2.0.3.Final\jandex-2.0.3.Final.jar;C:\Users\Lenovo\.m2\repository\dom4j\dom4j\1.6.1\dom4j-1.6.1.jar;C:\Users\Lenovo\.m2\repository\org\hibernate\common\hibernate-commons-annotations\5.0.1.Final\hibernate-commons-annotations-5.0.1.Final.jar;C:\Users\Lenovo\.m2\repository\javax\transaction\javax.transaction-api\1.2\javax.transaction-api-1.2.jar;C:\Users\Lenovo\.m2\repository\org\springframework\data\spring-data-jpa\2.0.9.RELEASE\spring-data-jpa-2.0.9.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\data\spring-data-commons\2.0.9.RELEASE\spring-data-commons-2.0.9.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\spring-orm\5.0.8.RELEASE\spring-orm-5.0.8.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\spring-context\5.0.8.RELEASE\spring-context-5.0.8.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\spring-tx\5.0.8.RELEASE\spring-tx-5.0.8.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\spring-beans\5.0.8.RELEASE\spring-beans-5.0.8.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\spring-aspects\5.0.8.RELEASE\spring-aspects-5.0.8.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\boot\spring-boot-starter-web\2.0.4.RELEASE\spring-boot-starter-web-2.0.4.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\boot\spring-boot-starter-json\2.0.4.RELEASE\spring-boot-starter-json-2.0.4.RELEASE.jar;C:\Users\Lenovo\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.9.6\jackson-databind-2.9.6.jar;C:\Users\Lenovo\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.9.6\jackson-core-2.9.6.jar;C:\Users\Lenovo\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.9.6\jackson-datatype-jdk8-2.9.6.jar;C:\Users\Lenovo\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.9.6\jackson-datatype-jsr310-2.9.6.jar;C:\Users\Lenovo\.m2\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.9.6\jackson-module-parameter-names-2.9.6.jar;C:\Users\Lenovo\.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\2.0.4.RELEASE\spring-boot-starter-tomcat-2.0.4.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\8.5.32\tomcat-embed-core-8.5.32.jar;C:\Users\Lenovo\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\8.5.32\tomcat-embed-el-8.5.32.jar;C:\Users\Lenovo\.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\8.5.32\tomcat-embed-websocket-8.5.32.jar;C:\Users\Lenovo\.m2\repository\org\hibernate\validator\hibernate-validator\6.0.11.Final\hibernate-validator-6.0.11.Final.jar;C:\Users\Lenovo\.m2\repository\javax\validation\validation-api\2.0.1.Final\validation-api-2.0.1.Final.jar;C:\Users\Lenovo\.m2\repository\org\springframework\spring-web\5.0.8.RELEASE\spring-web-5.0.8.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\spring-webmvc\5.0.8.RELEASE\spring-webmvc-5.0.8.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\spring-expression\5.0.8.RELEASE\spring-expression-5.0.8.RELEASE.jar;C:\Users\Lenovo\.m2\repository\mysql\mysql-connector-java\5.1.46\mysql-connector-java-5.1.46.jar;C:\Users\Lenovo\.m2\repository\org\springframework\spring-core\5.0.8.RELEASE\spring-core-5.0.8.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\spring-jcl\5.0.8.RELEASE\spring-jcl-5.0.8.RELEASE.jar;C:\Users\Lenovo\.m2\repository\io\springfox\springfox-swagger2\2.6.1\springfox-swagger2-2.6.1.jar;C:\Users\Lenovo\.m2\repository\io\swagger\swagger-annotations\1.5.10\swagger-annotations-1.5.10.jar;C:\Users\Lenovo\.m2\repository\io\swagger\swagger-models\1.5.10\swagger-models-1.5.10.jar;C:\Users\Lenovo\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.9.0\jackson-annotations-2.9.0.jar;C:\Users\Lenovo\.m2\repository\io\springfox\springfox-spi\2.6.1\springfox-spi-2.6.1.jar;C:\Users\Lenovo\.m2\repository\io\springfox\springfox-core\2.6.1\springfox-core-2.6.1.jar;C:\Users\Lenovo\.m2\repository\io\springfox\springfox-schema\2.6.1\springfox-schema-2.6.1.jar;C:\Users\Lenovo\.m2\repository\io\springfox\springfox-swagger-common\2.6.1\springfox-swagger-common-2.6.1.jar;C:\Users\Lenovo\.m2\repository\io\springfox\springfox-spring-web\2.6.1\springfox-spring-web-2.6.1.jar;C:\Users\Lenovo\.m2\repository\com\google\guava\guava\18.0\guava-18.0.jar;C:\Users\Lenovo\.m2\repository\com\fasterxml\classmate\1.3.4\classmate-1.3.4.jar;C:\Users\Lenovo\.m2\repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar;C:\Users\Lenovo\.m2\repository\org\springframework\plugin\spring-plugin-core\1.2.0.RELEASE\spring-plugin-core-1.2.0.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\springframework\plugin\spring-plugin-metadata\1.2.0.RELEASE\spring-plugin-metadata-1.2.0.RELEASE.jar;C:\Users\Lenovo\.m2\repository\org\mapstruct\mapstruct\1.0.0.Final\mapstruct-1.0.0.Final.jar;C:\Users\Lenovo\.m2\repository\io\springfox\springfox-swagger-ui\2.6.1\springfox-swagger-ui-2.6.1.jar;C:\Users\Lenovo\.m2\repository\com\github\xiaoymin\swagger-bootstrap-ui\1.6\swagger-bootstrap-ui-1.6.jar;C:\Users\Lenovo\.m2\repository\javax\mail\mail\1.4.7\mail-1.4.7.jar;C:\Users\Lenovo\.m2\repository\javax\activation\activation\1.1\activation-1.1.jar" com.example.example1.web.test1
aaa aab aac aad aae aaf aag aah aai aaj aak aal aam aan aao aap aaq aar aas aat aau aav aaw aax aay aaz 
aba abb abc abd abe abf abg abh abi abj abk abl abm abn abo abp abq abr abs abt abu abv abw abx aby abz 
aca acb acc acd ace acf acg ach aci acj ack acl acm acn aco acp acq acr acs act acu acv acw acx acy acz 
ada adb adc add ade adf adg adh adi adj adk adl adm adn ado adp adq adr ads adt adu adv adw adx ady adz 
aea aeb aec aed aee aef aeg aeh aei aej aek ael aem aen aeo aep aeq aer aes aet aeu aev aew aex aey aez 
afa afb afc afd afe aff afg afh afi afj afk afl afm afn afo afp afq afr afs aft afu afv afw afx afy afz 
aga agb agc agd age agf agg agh agi agj agk agl agm agn ago agp agq agr ags agt agu agv agw agx agy agz 
aha ahb ahc ahd ahe ahf ahg ahh ahi ahj ahk ahl ahm ahn aho ahp ahq ahr ahs aht ahu ahv ahw ahx ahy ahz 
aia aib aic aid aie aif aig aih aii aij aik ail aim ain aio aip aiq air ais ait aiu aiv aiw aix aiy aiz 
aja ajb ajc ajd aje ajf ajg ajh aji ajj ajk ajl ajm ajn ajo ajp ajq ajr ajs ajt aju ajv ajw ajx ajy ajz 
aka akb akc akd ake akf akg akh aki akj akk akl akm akn ako akp akq akr aks akt aku akv akw akx aky akz 
ala alb alc ald ale alf alg alh ali alj alk all alm aln alo alp alq alr als alt alu alv alw alx aly alz 
ama amb amc amd ame amf amg amh ami amj amk aml amm amn amo amp amq amr ams amt amu amv amw amx amy amz 
ana anb anc and ane anf ang anh ani anj ank anl anm ann ano anp anq anr ans ant anu anv anw anx any anz 
aoa aob aoc aod aoe aof aog aoh aoi aoj aok aol aom aon aoo aop aoq aor aos aot aou aov aow aox aoy aoz 
apa apb apc apd ape apf apg aph api apj apk apl apm apn apo app apq apr aps apt apu apv apw apx apy apz 
aqa aqb aqc aqd aqe aqf aqg aqh aqi aqj aqk aql aqm aqn aqo aqp aqq aqr aqs aqt aqu aqv aqw aqx aqy aqz 
ara arb arc ard are arf arg arh ari arj ark arl arm arn aro arp arq arr ars art aru arv arw arx ary arz 
asa asb asc asd ase asf asg ash asi asj ask asl asm asn aso asp asq asr ass ast asu asv asw asx asy asz 
ata atb atc atd ate atf atg ath ati atj atk atl atm atn ato atp atq atr ats att atu atv atw atx aty atz 
aua aub auc aud aue auf aug auh aui auj auk aul aum aun auo aup auq aur aus aut auu auv auw aux auy auz 
ava avb avc avd ave avf avg avh avi avj avk avl avm avn avo avp avq avr avs avt avu avv avw avx avy avz 
awa awb awc awd awe awf awg awh awi awj awk awl awm awn awo awp awq awr aws awt awu awv aww awx awy awz 
axa axb axc axd axe axf axg axh axi axj axk axl axm axn axo axp axq axr axs axt axu axv axw axx axy axz 
aya ayb ayc ayd aye ayf ayg ayh ayi ayj ayk ayl aym ayn ayo ayp ayq ayr ays ayt ayu ayv ayw ayx ayy ayz 
aza azb azc azd aze azf azg azh azi azj azk azl azm azn azo azp azq azr azs azt azu azv azw azx azy azz 

Process finished with exit code 0

 

下面的 是增加了写入文件操作

package com.utils;

import java.io.*;

public class test{
    public static void main(String[] args) {
        String a="aaaa";
        for (int i=1;i<26*26*26*26+1;i++){
            writrText(a+"  ");
            a=createNext(a);
            if (i%26==0){
                System.out.println("第"+(i)+"行");
                writrText("\n");
            }
        }
    }
    public static void writrText(String s){
        File file = new File("F:\\test1.txt");
        try {
        if (!file.exists()){
            file.createNewFile();
        }
        FileWriter fileWriter = new FileWriter(file,true);
        BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);
        bufferedWriter.write(s);
        bufferedWriter.close(); } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static String createNext(String string){
        char [] tempChar = string.toCharArray();
        for(int i =tempChar.length-1;i>=1;i--){
            if (tempChar[i]<'z' ){
                tempChar[i]=(char)(tempChar[i]+1);
                break;
            }else {
                tempChar[i]='a';
                tempChar[i-1]=(char)(tempChar[i-1]+1);
                if (tempChar[i-1]<='z'){
                    i=0;
                }
            }
        }
        return String.valueOf(tempChar);
    }

}