An warware: java samun hanyar appdata

A cikin duniyar haɓaka software ta yau, aikace-aikacen galibi suna buƙatar adanawa da dawo da takamaiman bayanan mai amfani. Wannan bayanan na iya haɗawa da saitunan aikace-aikacen, zaɓin mai amfani, ko ma fayilolin wucin gadi. Don adana wannan bayanan, aikace-aikacen suna buƙatar hanya don nemo jagorar da ta dace, wacce aka fi sani da hanyar “AppData”. A cikin wannan labarin, za mu bincika hanyar Java don wannan matsala, yin zurfafa cikin bayanin mataki-mataki na lambar. Bugu da ƙari, za mu tattauna dakunan karatu da ayyuka masu dangantaka da za su iya ragewa ko ba da gudummawa ga wannan batu.

Gabatarwa

Hanyar AppData wani babban fayil ne mai ɓoye a cikin kwamfutar mai amfani, inda aikace-aikacen zai iya adana takamaiman fayilolin mai amfani. Ana samun babban fayil ɗin AppData a cikin kundin adireshin gida na mai amfani. A cikin Windows, yana kan “% USERPROFILE%AppDataRoaming”, yayin da a cikin Linux ko macOS, jagorar da ta dace yawanci tana kan “~/.config”. Aikace-aikace yakamata su mutunta ƙa'idodin tsarin aiki lokacin adana bayanai, suna tabbatar da ingantaccen aiki a cikin dandamali.

Maganin Matsala

A cikin Java, hanya mafi sauƙi don nemo hanyar AppData shine ta amfani da kayan tsarin “user.home”. Bari mu kalli takaitacciyar hanya don nemo takamaiman hanyar AppData ta dandamali:

public class AppDataPath{

  public static String getAppDataPath(){
    String userHome = System.getProperty("user.home");
    String appDataPath;

    if(System.getProperty("os.name").toLowerCase().contains("windows")){
      appDataPath = userHome + "\AppData\Roaming";
    }else{
      appDataPath = userHome + "/.config";
    }
    return appDataPath;
  }
}

Bayanin mataki-mataki na Code

1. Mun fara ƙirƙirar aji mai suna 'AppDataPath' mai ɗauke da hanyar'getAppDataPath()'.

2. A cikin hanyar `getAppDataPath()`, muna maido da adireshin gida na mai amfani ta amfani da `System.getProperty("user.home")`.

3. Na gaba, muna ƙayyade tsarin aiki ta hanyar duba dukiyar tsarin "os.name". Idan ya ƙunshi “windows”, muna ɗaukar tsarin tushen Windows, yana haɗa kundin adireshin gida na mai amfani tare da “AppDataRoaming”.

4. Idan tsarin aiki ba Windows ba ne, muna ɗauka Linux ne ko macOS, tare da haɗa kundin adireshin gida na mai amfani tare da "/ config".

5. A ƙarshe, muna mayar da appDataPath, wanda ke nuna jagorar AppData mai dacewa don tsarin aiki na yanzu.

Java System Properties

Kaddarorin tsarin Java suna da mahimmanci yayin haɓaka aikace-aikacen dandamali. Suna ƙyale masu haɓakawa su tattara bayanai game da muhalli, kamar tsarin aiki, ɓoye fayil, ko bayanan da suka shafi mai amfani. Kaddarorin tsarin “os.name” da “user.home” da aka yi amfani da su a cikin maganin mu misalai biyu ne kawai na waɗannan kayan aikin masu ƙarfi.

Kaddarorin tsarin suna da daraja saboda dalilai da yawa:

• Suna ba da damar masu haɓakawa don ƙirƙirar aikace-aikacen da suka dace da kewayon saitin tsarin.
• Suna sauƙaƙe damar samun bayanan tsarin, maimakon dogaro da haɗaɗɗiyar haɗawar lambar asali ko ɗakin karatu na waje.
• Kaddarorin tsarin Java suna da sauƙin isa kuma ana iya ƙara su ta hanyar daidaitaccen API na Java, yana tabbatar da goyan bayan dandamali da daidaitawa na gaba.

Dakunan karatu masu alaƙa da Ayyuka

Yayin da mafitarmu ta mai da hankali kan tsantsar lambar Java, ɗakunan karatu da ayyuka daban-daban na iya ƙara sauƙaƙe ko tsawaita wannan aikin. Misali:

1. Kanfigareshan Commons Apache - Shahararren ɗakin karatu wanda ke ba da ingantacciyar hanya mai sauƙi don ɗaukar fayilolin sanyi, kaddarorin, da dawo da su. Wannan ɗakin karatu na iya karanta bayanan daidaitawa daga tushe da yawa, kamar fayilolin kaddarorin XML, JSON, ko Java.

2. JNA (Harkokin Ƙasar Java) - Laburaren Java wanda ke ba masu haɓaka damar kiran lambar asali (C/C++) kai tsaye daga Java. JNA na iya taimakawa a yanayin da ginanniyar tsarin kaddarorin Java ba su isa ba, ko kuma lokacin da ake buƙatar samun dama ga takamaiman fasali na asali.

A ƙarshe, sarrafa hanyar AppData a cikin aikace-aikacen Java yana da mahimmanci don adana takamaiman bayanan mai amfani. Ta amfani da kaddarorin tsarin Java da dakunan karatu masu alaƙa, masu haɓakawa na iya ƙirƙirar mafita da aka keɓance ga tsarin aiki daban-daban, don haka haɓaka daidaituwar dandamali na aikace-aikacen su.