SpringBoot2 jpa二级缓冲配置

maven的pom文件配置

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        // 添加 ---------------------------------
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-ehcache</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>net.sf.ehcache</groupId>
                    <artifactId>ehcache-core</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.ehcache</groupId>
            <artifactId>ehcache</artifactId>
            <version>3.5.2</version>
        </dependency>
    // -------------------------------------------------
    </dependencies>

配置文件

#开启二级缓存
spring.jpa.properties.hibernate.cache.use_second_level_cache=true
spring.jpa.properties.cache.use_query_cache=true
#指定缓存provider
spring.jpa.properties.hibernate.cache.region.factory_class=org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory

实体类配置

@Entity
@Table(name = "students")
@Cacheable(true)  //添加Cacheable
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE, region = "entityCache") //添加Cache
@JsonIgnoreProperties(value={"hibernateLazyInitializer","handler", "fieldHandler"})
public class Students {

    private Integer stuId;
    private String stuName;
    private Integer stuAge;
    private Integer stuSex;
    private Date stuBirth;
    private Collections collections;
    private Teacher teacher;

    @Id
    @Column(name = "stu_id")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    public Integer getStuId() {
        return stuId;
    }

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

    @Column(name = "stu_name", length = 15)
    public String getStuName() {
        return stuName;
    }

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

    @Column(name = "stu_age", length = 3)
    public Integer getStuAge() {
        return stuAge;
    }

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

    @Column(name = "stu_sex", length = 1)
    public Integer getStuSex() {
        return stuSex;
    }

    public void setStuSex(Integer stuSex) {
        this.stuSex = stuSex;
    }

    @Column(name = "stu_birth")
    @Temporal(TemporalType.DATE)
    public Date getStuBirth() {
        return stuBirth;
    }

    public void setStuBirth(Date stuBirth) {
        this.stuBirth = stuBirth;
    }

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "coll_id")
    public Collections getCollections() {
        return collections;
    }

    public void setCollections(Collections collections) {
        this.collections = collections;
    }

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "teacher_id")
    public Teacher getTeacher() {
        return teacher;
    }

    public void setTeacher(Teacher teacher) {
        this.teacher = teacher;
    }

    @Override
    public String toString() {
        return "Students => [" +
                "stuId=" + stuId +
                ", stuName='" + stuName + '\'' +
                ", stuAge=" + stuAge +
                ", stuSex=" + stuSex +
                ", stuBirth=" + stuBirth +
                ", collections=" + collections +
                ", teacher=" + teacher +
                ']';
    }
}

结果显示

Hibernate: 
    select
        teacher0_.teacher_id as teacher_1_3_0_,
        teacher0_.teacher_name as teacher_2_3_0_,
        teacher0_.teacher_sex as teacher_3_3_0_ 
    from
        teacher teacher0_ 
    where
        teacher0_.teacher_id=?

获取的类：Students => [stuId=3, stuName='张军', stuAge=12, stuSex=1, stuBirth=2018-01-01, collections=Collections => [collId=2, collName='一年级2班'], teacher=Teacher => [teacherId=2, teacherName='李老师', teacherSex=1]]

获取的类：Students => [stuId=3, stuName='张军', stuAge=12, stuSex=1, stuBirth=2018-01-01, collections=Collections => [collId=2, collName='一年级2班'], teacher=Teacher => [teacherId=2, teacherName='李老师', teacherSex=1]]