springdata JpaRepository 总结篇

迈不过友情╰ 2022-05-24 07:48 204阅读 0赞

![70][]

1、包含自定义几口、JpaRepository接口以及可扩展的JpaRepository的方法（findByName）

@Repository("jpaTestDao")

**publicinterface**JpaTestDao **extends**JpaRepository<T\_aVo,Integer>,JpaTestFactory\{

T\_aVofindByName(String name);

T\_aVofindById(String id);

2、springdatajpa 自带接口

3、自定义接口

**publicinterface**JpaTestFactory \{

**public** List<T\_aVo> getAlls();

4、自定义接口实现---------扩展（为了满足非全表查询的功能）

**publicclass**JpaTestDaoImpl **implements** JpaTestFactory\{

@PersistenceContext

**private**EntityManager em;

**public** List<T\_aVo>getAlls() \{

Stringsql= "select name from T\_aVo ";

QuerydataQuery= em.createQuery(sql);

Listdata= dataQuery.getResultList();

**returnnull**;

\};

总结：需要将自定义接口和springdata自带接口统一到同一个接口向外面提供服务（jpaTestDao供service使用）

<table> 
 <tbody> 
  <tr> 
   <td align="right"></td> 
   <td align="left">Detect languageAfrikaansAlbanianArabicArmenianAzerbaijaniBasqueBelarusianBengaliBosnianBulgarianCatalanCebuanoChichewaChinese (Simplified)Chinese (Traditional)CroatianCzechDanishDutchEnglishEsperantoEstonianFilipinoFinnishFrenchGalicianGeorgianGermanGreekGujaratiHaitian CreoleHausaHebrewHindiHmongHungarianIcelandicIgboIndonesianIrishItalianJapaneseJavaneseKannadaKazakhKhmerKoreanLaoLatinLatvianLithuanianMacedonianMalagasyMalayMalayalamMalteseMaoriMarathiMongolianMyanmar (Burmese)NepaliNorwegianPersianPolishPortuguesePunjabiRomanianRussianSerbianSesothoSinhalaSlovakSlovenianSomaliSpanishSundaneseSwahiliSwedishTajikTamilTeluguThaiTurkishUkrainianUrduUzbekVietnameseWelshYiddishYorubaZulu</td> 
   <td align="center"> 
    <div title="Switch languages" style="background:rgba(0,0,0,0) repeat scroll 0% 0%;"></div></td> 
   <td align="left">AfrikaansAlbanianArabicArmenianAzerbaijaniBasqueBelarusianBengaliBosnianBulgarianCatalanCebuanoChichewaChinese (Simplified)Chinese (Traditional)CroatianCzechDanishDutchEnglishEsperantoEstonianFilipinoFinnishFrenchGalicianGeorgianGermanGreekGujaratiHaitian CreoleHausaHebrewHindiHmongHungarianIcelandicIgboIndonesianIrishItalianJapaneseJavaneseKannadaKazakhKhmerKoreanLaoLatinLatvianLithuanianMacedonianMalagasyMalayMalayalamMalteseMaoriMarathiMongolianMyanmar (Burmese)NepaliNorwegianPersianPolishPortuguesePunjabiRomanianRussianSerbianSesothoSinhalaSlovakSlovenianSomaliSpanishSundaneseSwahiliSwedishTajikTamilTeluguThaiTurkishUkrainianUrduUzbekVietnameseWelshYiddishYorubaZulu</td> 
   <td align="center"> 
    <div title="undefined" style="background:rgba(0,0,0,0) repeat scroll 0% 0%;"></div></td> 
   <td align="center"> 
    <div title="Copy translation" style="background:rgba(0,0,0,0) repeat scroll 0% 0%;"></div></td> 
   <td align="center"> 
    <div></div> 
    <div title="Font size" style="background:rgba(0,0,0,0) repeat scroll 0% 0%;"></div></td> 
   <td align="center"> 
    <div title="Help" style="background:rgba(0,0,0,0) repeat scroll 0% 0%;"></div></td> 
   <td align="right"> 
    <div title="Pin pop-up bubble" style="background:rgba(0,0,0,0) repeat scroll 0% 0%;"></div></td> 
  </tr> 
 </tbody> 
</table>

Text-to-speech function is limited to 200 characters

<table> 
 <tbody> 
  <tr> 
   <td align="center"></td> 
   <td align="left"> 
    <div title="Show Translator's button 3 second(s)" style="background:rgba(0,0,0,0) repeat scroll 0% 0%;"></div></td> 
   <td align="center"><a title="Show options" rel="nofollow">Options</a> : <a title="Translation History" rel="nofollow">History</a> : <a title="ImTranslator Feedback" rel="nofollow">Feedback</a> : <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&amp;hosted_button_id=GD9D8CPW8HFA2" title="Make a small contribution" rel="nofollow">Donate</a></td> 
   <td align="right"><span title="Close">Close</span></td> 
  </tr> 
 </tbody> 
</table>

[70]: /images/20220524/6beee373c6ef4baf85577e385436a2e9.png