springboot-springdatajpa

springBoot-springdataJpa整合

写在前面,使用的持久层实现是hibernate

####1.springBoot-springdataJpa整合之环境配置

<?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.xcl</groupId>
    <artifactId>springboot_springdataJpa</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.1.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-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- springBoot JPA的起步依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <!-- MySQL连接驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!--jdk9需要导入如下坐标-->
        <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
            <version>2.3.0</version>
        </dependency>
    </dependencies>
    
</project>

####2.springBoot-springdataJpa整合之实体类

package com.xcl.domain;

import javax.persistence.*;

@Entity
@Table(name="tb_student")
public class Student {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name="stu_id")
    private Long  stuId;
    @Column(name="stu_name")
    private String stuName;
    @Column(name="stu_age")
    private String stuAge;

    @Override
    public String toString() {
        return "Student{" +
                "stuId=" + stuId +
                ", stuName='" + stuName + '\'' +
                ", stuAge='" + stuAge + '\'' +
                '}';
    }

    public Student(String stuName, String stuAge) {
        this.stuName = stuName;
        this.stuAge = stuAge;
    }

    @Column(name="stu_id")
    public Long getStuId() {
        return stuId;
    }

    public void setStuId(Long stuId) {
        this.stuId = stuId;
    }

    public String getStuName() {
        return stuName;
    }

    public void setStuName(String stuName) {
        this.stuName = stuName;
    }

    public String getStuAge() {
        return stuAge;
    }

    public void setStuAge(String stuAge) {
        this.stuAge = stuAge;
    }
}

####3.springBoot-springdataJpa整合之dao接口

package com.xcl.dao;

import com.xcl.domain.Student;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;

public interface StudentDao extends JpaRepository<Student,Long>,JpaSpecificationExecutor<Student> {
}

####4.pringBoot-springdataJpa整合之配置文件application.properties

#DB Configuration:
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/boot?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=root

#JPA Configuration:
spring.jpa.database=MySQL
spring.jpa.show-sql=true
spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.hibernate.naming_strategy=org.hibernate.cfg.ImprovedNamingStrategy

####5.pringBoot-springdataJpa整合之测试

package com.xcl.test;

import com.xcl.MySpringBootApplication;
import com.xcl.dao.StudentDao;
import com.xcl.domain.Student;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest(classes = MySpringBootApplication.class)
public class StudentDaoTest {
    @Autowired
    private StudentDao studentDao;
    @Test
    public void testSave(){
        Student student = new Student("小黑", "0.5");
        studentDao.save(student);
    }
}

恭喜你完成了整合,可以开始你的代码之旅了!!!