SpringBoot之結合Spring Data Jpa使用
阿新 • • 發佈:2018-12-19
1、建立SpringBoot工程,新增相關依賴
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.example</groupId> <artifactId>jpa</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>jpa</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.4.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <!-- Mysql依賴 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.51</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
2、新增相關配置相關配置檔案
######################################################## ###datasource ######################################################## spring: datasource: url: jdbc:mysql://111.230.180.89:3306/springboot username: root password: xu0719wd driver-class-name: com.mysql.jdbc.Driver jpa: database: MYSQL show-sql: true #Hibernate ddl auto hibernate: ddl-auto: update naming-strategy: org.hibernate.cfg.ImprovedNamingStrategy properties: hibernate: dialect: org.hibernate.dialect.MySQL5Dialect server: port: 8003 servlet: context-path: /jpa
3、建立實體類
package com.example.entity; import javax.persistence.*; import java.util.Date; /** * @author admin * @date 2018/10/31 */ @Entity public class User { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Integer id;//指定主鍵及生成策略 @Column private String name; @Column(name = "create_time") private Date createTime; @Column(name = "department_id") private Integer departmentId; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Date getCreateTime() { return createTime; } public void setCreateTime(Date createTime) { this.createTime = createTime; } public Integer getDepartmentId() { return departmentId; } public void setDepartmentId(Integer departmentId) { this.departmentId = departmentId; } } 4、實現
(1)Repository
package com.example.Repository;
import com.example.entity.User;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
/** * @author admin * @date 2018/10/31 */
@Repository public interface UserRepository extends CrudRepository<User,Integer> { }
(1)PagingAndSorttingRepository
繼承了CrudRepository,又新增了方法
Iterable<T> findAll(Sort var1);
Page<T> findAll(Pageable var1);
(2)JpaRepository提供了更多使用功能,Example對物件進行查詢