springboot2+jpa+hikari+oracle例項演示
阿新 • • 發佈：2020-09-19
1.技術選型
jpa：簡單方便，基於Spring構建，簡化了持久層開發，只要繼承Repository就有簡單的增刪改查功能了，且自帶分頁功能
hikari：最快的資料庫連線池，springboot2自帶，不需要用到監控頁面的話推薦使用hikari
oracle：生產環境最常用
2.程式碼例項
主要依賴pom.xml:
1 <dependencies> 2 <dependency> 3 <groupId>org.springframework.boot</groupId> 4 <artifactId>spring-boot-starter-web</artifactId> 5 </dependency> 6 <dependency> 7 <groupId>org.springframework.boot</groupId> 8 <artifactId>spring-boot-starter-data-jpa</artifactId> 9 </dependency> 10 <dependency> 11 <groupId>com.oracle</groupId> 12 <artifactId>ojdbc7</artifactId> 13 <version>12.1.0.1.0</version> 14 </dependency> 15 <!--很不錯的一個工具類庫-hutool，推薦使用--> 16 <dependency> 17 <groupId>cn.hutool</groupId> 18 <artifactId>hutool-all</artifactId> 19 <version>5.4.2</version> 20 </dependency>
配置檔案application.yml:
1 spring: 2 datasource: 3 ##使用hikari資料來源 4 type: com.zaxxer.hikari.HikariDataSource 5 ##使用oracle連線驅動 6 driver-class-name: oracle.jdbc.driver.OracleDriver 7 ##資料庫連線地址 8 url: jdbc:oracle:thin:@000.000.000.000:1520:orcl 9 ##資料庫連線使用者名稱 10 username: xxx 11 ##資料庫連線密碼 12 password: xxxxxx 13 hikari: 14 ##池中維護的最小空閒連線數 15 minimum-idle: 5 16 ##池中最大連線數，包括閒置和使用中的連線 17 maximum-pool-size: 15 18 ##自動提交從池中返回的連線 19 auto-commit: true 20 ##連線允許在池中閒置的最長時間 21 idle-timeout: 30000 22 ##連線池的使用者定義名稱，主要出現在日誌記錄和JMX管理控制檯中以識別池和池配置 23 pool-name: DatebookHikariCP 24 ##池中連線最長生命週期 25 max-lifetime: 18000000 26 ##等待來自池的連線的最大毫秒數 27 connection-timeout: 30000 28 ##驗證該連線是否是有效的查詢語句 29 connection-test-query: select 1 from dual
jpa自動生成實體類TestUserEntity:
1 package com.project.demo.spring.boot.model; 2 3 import javax.persistence.*; 4 import java.util.Objects; 5 6 /** 7 * @author:wk 8 * @date:2020/9/16 9 */ 10 @Entity 11 @Table(name = "TEST_USER", schema = "TW_E", catalog = "") 12 public class TestUserEntity { 13 private String name; 14 private String password; 15 private String phoneNo; 16 private String remark; 17 private String id; 18 19 @Basic 20 @Column(name = "NAME") 21 public String getName() { 22 return name; 23 } 24 25 public void setName(String name) { 26 this.name = name; 27 } 28 29 @Basic 30 @Column(name = "PASSWORD") 31 public String getPassword() { 32 return password; 33 } 34 35 public void setPassword(String password) { 36 this.password = password; 37 } 38 39 @Basic 40 @Column(name = "PHONE_NO") 41 public String getPhoneNo() { 42 return phoneNo; 43 } 44 45 public void setPhoneNo(String phoneNo) { 46 this.phoneNo = phoneNo; 47 } 48 49 @Basic 50 @Column(name = "REMARK") 51 public String getRemark() { 52 return remark; 53 } 54 55 public void setRemark(String remark) { 56 this.remark = remark; 57 } 58 59 @Override 60 public boolean equals(Object o) { 61 if (this == o) return true; 62 if (o == null || getClass() != o.getClass()) return false; 63 TestUserEntity that = (TestUserEntity) o; 64 return Objects.equals(name, that.name) && 65 Objects.equals(password, that.password) && 66 Objects.equals(phoneNo, that.phoneNo) && 67 Objects.equals(remark, that.remark); 68 } 69 70 @Override 71 public int hashCode() { 72 return Objects.hash(name, password, phoneNo, remark); 73 } 74 75 @Id 76 @Column(name = "ID") 77 public String getId() { 78 return id; 79 } 80 81 public void setId(String id) { 82 this.id = id; 83 } 84 }
建立TestUserRepository，繼承JpaRepository,可實現簡單的增刪改查，TestUserEntity和String引數為實體類和主鍵，加@Query註解實現自定義查詢語句:
1 package com.project.demo.spring.boot.repository; 2 3 import com.project.demo.spring.boot.model.TestUserEntity; 4 import org.springframework.data.jpa.repository.JpaRepository; 5 import org.springframework.data.jpa.repository.Query; 6 import org.springframework.data.repository.query.Param; 7 8 import java.util.List; 9 10 /** 11 * @author:wk 12 * @date:2020/9/16 13 */ 14 public interface TestUserRepository extends JpaRepository<TestUserEntity, String> { 15 16 /** 17 * 自定義查詢語句介面 18 * 19 * @param name 20 * @return 21 */ 22 @Query(nativeQuery = true, value = "SELECT * FROM TEST_USER WHERE name = :name ") 23 List<TestUserEntity> findUserByName(@Param("name") String name); 24 }
測試用的controller:
1 package com.project.demo.spring.boot.controller; 2 3 import cn.hutool.core.collection.CollectionUtil; 4 import com.project.demo.spring.boot.model.TestUserEntity; 5 import com.project.demo.spring.boot.repository.TestUserRepository; 6 import org.springframework.beans.factory.annotation.Autowired; 7 import org.springframework.stereotype.Controller; 8 import org.springframework.web.bind.annotation.*; 9 10 import java.util.List; 11 12 /** 13 * @author:wk 14 * @date:2020/9/11 15 */ 16 @ResponseBody 17 @Controller 18 @RequestMapping("/demo") 19 public class TestUserController { 20 @Autowired 21 private TestUserRepository testUserRepository; 22 23 @GetMapping("/getAllUser") 24 public List<TestUserEntity> getAllUser() { 25 List<TestUserEntity> allUser = testUserRepository.findAll(); 26 return allUser; 27 } 28 29 @PostMapping("/saveAllUser") 30 public List<TestUserEntity> saveAllUser(@RequestBody List<TestUserEntity> resource) { 31 List<TestUserEntity> allUser = CollectionUtil.newArrayList(resource); 32 List<TestUserEntity> successUser = testUserRepository.saveAll(allUser); 33 return successUser; 34 } 35 36 @DeleteMapping("/deleteUserById") 37 public String deleteUserById(@RequestBody String ids) { 38 List<String> idList = CollectionUtil.toList(ids.split(",")); 39 idList.parallelStream().forEach(id -> testUserRepository.deleteById(id)); 40 return "success"; 41 } 42 43 @GetMapping("/findUserByName") 44 public List<TestUserEntity> findUserByName(@RequestBody String name) { 45 List<TestUserEntity> allUser = testUserRepository.findUserByName(name); 46 return allUser; 47 } 48 49 }
3.演示
新增兩個使用者，新增成功：
獲取到所有的user：
呼叫自定義查詢介面，通過name查詢使用者：
刪除id為1和2的使用者
成功刪除後查詢為空：