spring-data-jpa實現增刪改查以及分頁操作方法

有幾個坑一定要注意：

實現刪除操作的時候一定要在各層類中增加

@Transactional

註釋，否則會一直報錯

在自己使用@Query定義操作時，會碰到編譯器報錯，這個時候只需要禁用QL的語法檢查即可

以下是部分代碼：

//Repository

 package com.example.myproject.dao;import com.example.myproject.domain.User;import org.springframework.data.domain.Page;import org.springframework.data.domain.Pageable;import org.springframework.data.jpa.repository.JpaRepository;import org.springframework.data.jpa.repository.Modifying;import org.springframework.data.jpa.repository.Query;import org.springframework.data.repository.query.Param;import javax.transaction.Transactional;import java.util.List;/** * Created by lenovo on 2017/4/19. */@Transactionalpublic interface UserRepository extends JpaRepository<User,Long> { void deleteById(int id); void deleteByName(String name); void deleteBySex(String sex); void deleteByAge(int age); void removeByNameAndAge(String name, int age); @Modifying @Query(value = "update user u set u.name = :newName where u.name = :oldName",nativeQuery = true) void updateNameByName(@Param("oldName") String oldName, @Param("newName") String newName); List<User> findAll(); Page<User> findAll(Pageable pageable); List<User> findByName(String name); List<User> findBySex(String sex); List<User> findByAge(int age); User findByNameAndSex(String name, String sex);}

//Controller

 package com.example.myproject.web; import com.example.myproject.dao.UserRepository; import com.example.myproject.domain.User; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.domain.Page; import org.springframework.data.domain.PageRequest; import org.springframework.data.domain.Pageable; import org.springframework.data.domain.Sort; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import javax.transaction.Transactional; import java.util.List; /** * Created by lenovo on 2017/4/19. */ @RestController @RequestMapping("/") @Transactional public class UserController { @Autowired private UserRepository userRepository; @RequestMapping(value = "/userSave") public String userSave(@RequestParam String name,@RequestParam String sex,@RequestParam int age) { User user = new User(); user.setName(name); user.setAge(age); user.setSex(sex); userRepository.save(user); return "true"; } @RequestMapping(value = "/deleteById") public String deleteById(@RequestParam int id) { userRepository.deleteById(id); return "success"; } @RequestMapping(value = "/deleteByName") public String deleteByName(@RequestParam String name) { userRepository.deleteByName(name); return "success"; } @RequestMapping(value = "/deleteBySex") public String deleteBySex(@RequestParam String sex) { userRepository.deleteBySex(sex); return "success"; } @RequestMapping(value = "/deleteByAge") public String deleteByAge(@RequestParam int age) { userRepository.deleteByAge(age); return "success"; } @RequestMapping(value = "/deleteByNameAndAge") public String deleteByNameAndAge(@RequestParam String name, @RequestParam int age) { userRepository.removeByNameAndAge(name,age); return "success"; } @RequestMapping(value = "/updateNameByName") public String updateNameByName(@RequestParam String oldName, @RequestParam String newName) { userRepository.updateNameByName(oldName,newName); return "success"; } @RequestMapping(value = "/findall") public List<User> findAll() { List<User> l =userRepository.findAll(); return l; } @RequestMapping(value = "/findallByPage") public Page<User> findAllByPage() { Sort sort = new Sort(Sort.Direction.ASC,"id"); Pageable pageable = new PageRequest(2,6,sort); Page<User> page = userRepository.findAll(pageable); return page; } @RequestMapping(value = "/findByName") public List<User> findByName(@RequestParam String name) { List<User> list =userRepository.findByName(name); return list; } @RequestMapping(value = "/findByAge") public List<User> findByAge(@RequestParam int age) { List<User> list =userRepository.findByAge(age); return list; } @RequestMapping(value = "/findBySex") public List<User> findBySex(@RequestParam String sex) { List<User> list =userRepository.findBySex(sex); return list; } @RequestMapping(value = "/findByNameAndSex") public User findByNameAndSex(@RequestParam String name, @RequestParam String sex) { User list =userRepository.findByNameAndSex(name,sex); return list; } }

//User

 package com.example.myproject.domain;import javax.persistence.*;/** * Created by lenovo on 2017/4/19. */@Entitypublic class User { @Id @GeneratedValue() private Integer id; @Column private String name; @Column private String sex; @Column private int age; public Integer getId() { return id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public int getAge() { return age; } public void setAge(int age) { this.age = age; }}

以上這篇spring-data-jpa實現增刪改查以及分頁操作方法就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持武林網。