【极光系列】springboot集成hibernate

gitee地址

直接下载可用 https://gitee.com/shawsongyue/aurora.git

模块：aurora_hibernate

mysql安装教程

参考我另外一篇文章，直接下载安装 https://blog.csdn.net/weixin_40736233/article/details/135582926?spm=1001.2014.3001.5501

集成hibernate步骤

tips：包结构如图

1.处理数据库表

CREATE DATABASE aurora;CREATE TABLE `tianchi_resource` (`id` bigint NOT NULL AUTO_INCREMENT COMMENT '自增主键',`resource_name` varchar(128) DEFAULT NULL COMMENT '资源名称',`resource_path` varchar(255) DEFAULT NULL COMMENT '资源路径',`resource_icon` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '资源图标',`resource_icon_color` varchar(32) DEFAULT NULL COMMENT '资源图标颜色',`resource_describe` varchar(255) DEFAULT NULL COMMENT '资源描述',`resource_author` varchar(16) DEFAULT NULL COMMENT '资源作者',`resource_type` varchar(16) DEFAULT NULL COMMENT '资源类型',`create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',`update_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=12 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;INSERT INTO `aurora`.`tianchi_resource` (`id`, `resource_name`, `resource_path`, `resource_icon`, `resource_icon_color`, `resource_describe`, `resource_author`, `resource_type`, `create_time`, `update_time`) VALUES (12, 'colorUI资源包', 'http://baidu.com', 'tag', 'red', 'colorUI资源包一键下载可用', 'aurora', '1', '2024-01-14 15:26:12', '2024-01-14 15:26:12');
INSERT INTO `aurora`.`tianchi_resource` (`id`, `resource_name`, `resource_path`, `resource_icon`, `resource_icon_color`, `resource_describe`, `resource_author`, `resource_type`, `create_time`, `update_time`) VALUES (13, 'idea开开发工具资源包', 'http://baidu.com', 'tag', 'red', 'idea开开发工具资源包一键下载可用', 'aurora', '1', '2024-01-14 15:26:12', '2024-01-14 15:26:12');

2.处理依赖pom.xml

<?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.xsy</groupId><artifactId>aurora_hibernate</artifactId><version>1.0-SNAPSHOT</version><!--基础SpringBoot依赖--><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.3.5.RELEASE</version></parent><!--属性设置--><properties><!--java_JDK版本--><java.version>1.8</java.version><!--maven打包插件--><maven.plugin.version>3.8.1</maven.plugin.version><!--编译编码UTF-8--><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><!--输出报告编码UTF-8--><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><!--mysql版本--><mysql-connector-java.version>8.0.21</mysql-connector-java.version><!--json数据格式处理工具--><fastjson.version>1.2.75</fastjson.version></properties><!--通用依赖--><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><!-- Lombok --><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></dependency><!-- json --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>${fastjson.version}</version></dependency><!--mysql--><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql-connector-java.version}</version><scope>runtime</scope></dependency><!-- 集成spring data jpa --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId></dependency><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-core</artifactId></dependency></dependencies><!--编译打包--><build><finalName>${project.name}</finalName><!--资源文件打包--><resources><resource><directory>src/main/resources</directory></resource><resource><directory>src/main/java</directory><includes><include>**/*.xml</include></includes></resource></resources><!--插件统一管理--><pluginManagement><plugins><!--maven打包插件--><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><version>${spring.boot.version}</version><configuration><fork>true</fork><finalName>${project.build.finalName}</finalName></configuration><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin><!--编译打包插件--><plugin><artifactId>maven-compiler-plugin</artifactId><version>${maven.plugin.version}</version><configuration><source>${java.version}</source><target>${java.version}</target><encoding>UTF-8</encoding><compilerArgs><arg>-parameters</arg></compilerArgs></configuration></plugin></plugins></pluginManagement></build><!--配置Maven项目中需要使用的远程仓库--><repositories><repository><id>aliyun-repos</id><url>https://maven.aliyun.com/nexus/content/groups/public/</url><snapshots><enabled>false</enabled></snapshots></repository></repositories><!--用来配置maven插件的远程仓库--><pluginRepositories><pluginRepository><id>aliyun-plugin</id><url>https://maven.aliyun.com/nexus/content/groups/public/</url><snapshots><enabled>false</enabled></snapshots></pluginRepository></pluginRepositories></project>

3.处理配置application.yml

#服务配置
server:#端口port: 7002#spring配置
spring:#应用配置application:#应用名name: aurora_hibernate#数据源配置datasource:#驱动driver-class-name: com.mysql.cj.jdbc.Driver#连接地址url: jdbc:mysql://127.0.0.1:3306/aurora?serverTimezone=UTC&characterEncoding=UTF-8&useUnicode=true&useSSL=false&tinyInt1isBit=false&allowPublicKeyRetrieval=true#数据库用户username: root#数据库密码password: xiaosongyue.1997#hibernate配置jpa:#配置数据库引擎,不配置则默认为myisam引擎database-platform: org.hibernate.dialect.MySQL8Dialectshow-sql: truedatabase: mysqlhibernate:#create： 每次加载hibernate时都会删除上一次的生成的表，然后根据你的model类再重新来生成新表，哪怕两次没有任何改变也要这样执行，这就是导致数据库表数据丢失的一个重要原因。#create-drop ：每次加载hibernate时根据model类生成表，但是sessionFactory一关闭,表就自动删除。#update：最常用的属性，第一次加载hibernate时根据model类会自动建立起表的结构（前提是先建立好数据库），以后加载hibernate时根据 model类自动更新表结构，即使表结构改变了但表中的行仍然存在不会删除以前的行。要注意的是当部署到服务器后，表结构是不会被马上建立起来的，是要等 应用第一次运行起来后才会。#validate ：每次加载hibernate时，验证创建数据库表结构，只会和数据库中的表进行比较，不会创建新表，但是会插入新值。#none : 什么都不做。ddl-auto: none#日志设置
logging:#日志级别level:springfox: errorcom.example.hibernate: debug

4.创建对应的类

tips：包结构如图

（1）主启动类

package com.aurora;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;/*** @author 浅夏的猫* @description 主启动类* @date 22:46 2024/1/13*/
@SpringBootApplication
public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}
}

（2）实体类

tips：* @Entity注 解，表示这是一个JPA实体类* @Table 注解用于指定实体类映射到的数据库表名* @Id注 解用于指定实体类的主键* @GeneratedValue 注解指定了主键的生成策略* @Column 注解用于指定实体类属性映射到的数据库列名* @Transient 映射数据表和对象关系时候就不会报在表中不存在该字段* @CreationTimestamp 插入数据时自动更新时间

package com.aurora.entity;import com.fasterxml.jackson.annotation.JsonFormat;
import org.hibernate.annotations.CreationTimestamp;
import org.hibernate.annotations.UpdateTimestamp;import javax.persistence.*;
import java.io.Serializable;
import java.util.Date;/*** @author 浅夏的猫* @description 资源实体类** @Entity注 解，表示这是一个JPA实体类* @Table 注解用于指定实体类映射到的数据库表名* @Id注 解用于指定实体类的主键* @GeneratedValue 注解指定了主键的生成策略* @Column 注解用于指定实体类属性映射到的数据库列名* @Transient 映射数据表和对象关系时候就不会报在表中不存在该字段* @CreationTimestamp 插入数据时自动更新时间** @date 22:42 2024/1/13*/
@Entity
@Table(name = "tianchi_resource")
public class ResourceEntity implements Serializable {private static final long serialVersionUID = 1L;//资源id@Id@GeneratedValue(strategy = GenerationType.IDENTITY)private Long id;//资源名称@Column(name = "resource_name")private String resourceName;//资源路径@Column(name = "resource_path")private String resourcePath;//资源图标@Column(name = "resource_icon")private String resourceIcon;//资源图标颜色@Column(name = "resource_icon_color")private String resourceIconColor;//资源描述@Column(name = "resource_describe")private String resourceDescribe;//资源类型@Column(name = "resource_type")private String resourceType;//资源作者@Column(name = "resource_author")private String resourceAuthor;//资源创建时间@Column(name = "create_time")@CreationTimestamp@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")private Date createTime;//资源更新时间@UpdateTimestamp@Column(name = "update_time")@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")private Date updateTime;//查询结束时间@Transientprivate Date endTime;public Long getId() {return id;}public void setId(Long id) {this.id = id;}public String getResourceName() {return resourceName;}public void setResourceName(String resourceName) {this.resourceName = resourceName;}public String getResourcePath() {return resourcePath;}public void setResourcePath(String resourcePath) {this.resourcePath = resourcePath;}public String getResourceIcon() {return resourceIcon;}public void setResourceIcon(String resourceIcon) {this.resourceIcon = resourceIcon;}public String getResourceIconColor() {return resourceIconColor;}public void setResourceIconColor(String resourceIconColor) {this.resourceIconColor = resourceIconColor;}public String getResourceDescribe() {return resourceDescribe;}public void setResourceDescribe(String resourceDescribe) {this.resourceDescribe = resourceDescribe;}public String getResourceType() {return resourceType;}public void setResourceType(String resourceType) {this.resourceType = resourceType;}public String getResourceAuthor() {return resourceAuthor;}public void setResourceAuthor(String resourceAuthor) {this.resourceAuthor = resourceAuthor;}public Date getCreateTime() {return createTime;}public void setCreateTime(Date createTime) {this.createTime = createTime;}public Date getUpdateTime() {return updateTime;}public void setUpdateTime(Date updateTime) {this.updateTime = updateTime;}public Date getEndTime() {return endTime;}public void setEndTime(Date endTime) {this.endTime = endTime;}@Overridepublic String toString() {return "ResourceEntity{" +"id=" + id +", resourceName='" + resourceName + '\'' +", resourcePath='" + resourcePath + '\'' +", resourceIcon='" + resourceIcon + '\'' +", resourceIconColor='" + resourceIconColor + '\'' +", resourceDescribe='" + resourceDescribe + '\'' +", resourceType='" + resourceType + '\'' +", resourceAuthor='" + resourceAuthor + '\'' +", createTime=" + createTime +", updateTime=" + updateTime +", endTime=" + endTime +'}';}
}

（3）创建映射类

package com.aurora.mapper;import com.aurora.entity.ResourceEntity;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;/*** @author 浅夏的猫* @description 资源mapper操作类* @date 22:45 2024/1/13*/
@Repository
public interface ResourceMapper extends JpaRepository<ResourceEntity, Long> {
}

（4）创建控制类

package com.aurora.controller;import com.aurora.entity.ResourceEntity;
import com.aurora.mapper.ResourceMapper;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import javax.annotation.Resource;
import java.util.List;/*** @author 浅夏的猫* @description 资源controller* @date 22:38 2024/1/13*/
@RestController
@RequestMapping("/resource")
public class ResourceController {@Resourceprivate ResourceMapper resourceMapper;/*** @return java.util.List<com.aurora.entity.ResourceEntity>* @description 查询全部资源数据列表* @author 浅夏的猫* @date 22:40 2024/1/13*/@RequestMapping("/list")public List<ResourceEntity> list() {return resourceMapper.findAll();}
}

（5）启动应用，控制台访问

tips： 访问地址http://localhost:7002/resource/list