JAVA学习日记3——springboot整合JPA_eclipse springboot jpa-优快云博客

项目配置

eclipse 先通过 help—>EclipseMarketplace 搜索 Spring Tools4 下载插件

创建Maven项目

指定项目创建目录后，需要填写GroupID（包名） ArtifactID（project名）；

然后在生成的工程目录中参考官方的spring-boot-starter的pom.xml完善新建项目的各种配置（依赖配置，构建配置等）。

（当然加入和JPA以及数据源相关的依赖是整合JPA所必须的）

<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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    
  <groupId>SpringBootDemo</groupId>
  <artifactId>fengxin</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>
  <name>fengxin</name>
  <description>Demo project for Spring Boot by fengxin</description>


  <properties>
    <java.version>1.8</java.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </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-data-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

修改jre依赖

选中project 右键 —>properties—>java buildpath—remove 错误的依赖，再add JSE1.8

生成maven依赖

选中project 右键 —> maven—>update project

添加source目录

新建java同级文件夹resources 添加到java buildpath的source中

application配置

在resources目录下新建static目录，在static目录中创建配置文件application.yml或者application.properties

设置application.yml如下（驱动和数据库访问参数参考本博客另一篇文章https://blog.youkuaiyun.com/junior_programmer/article/details/89491240）

server:
  port: 9005 #指定启动端口号
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/fund?useSSL=FALSE&serverTimezone=UTC&allowPublicKeyRetrieval=true
    username: root
    password: 123456
  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true

或者等效地设置application.properties如下

server.port=9005#指定端口号
#设置数据源参数
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/dbname?useSSL=FALSE&serverTimezone=UTC&allowPublicKeyRetrieval=true
spring.datasource.username=root
spring.datasource.password=12345
#jpa设置
#实体类创建时相应地更新数据库表
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true