[英]Setting up : Spring boot + jpa + postgresql
after searching for a long time i can't figure out how to work with spring-boot and postgresql. 经过很长一段时间的搜索后,我不知道如何使用spring-boot和postgresql。 Spring-boot is starting without warnings. 春季启动没有警告就开始了。 The postgres server is running, but i dont know if spring-boot can access it. postgres服务器正在运行,但是我不知道spring-boot是否可以访问它。 Are the following files right ? 以下文件正确吗?
pom.xml : 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>org.springframework</groupId>
<artifactId>gs-spring-boot</artifactId>
<version>0.1.0</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
</parent>
<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-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.3.RELEASE</version>
</dependency>
</dependencies>
<properties>
<java.version>1.8</java.version>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
application.properties : application.properties:
spring.jpa.database=POSTGRESQL
spring.jpa.show-sql=false
spring.jpa.hibernate.ddl-auto=update
spring.datasource.driverClassName=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://localhost:5432/springbootdb
spring.datasource.username=postgres
spring.datasource.password=db
Entity : 实体 :
@Entity
public class Frame implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String raw;
private String time;
private double tempRad;
private double tempAirIn;
private double tempAirOut;
public Frame(String time, double tempRad, double tempAirIn, double tempAirOut){
this.time = time;
this.tempRad = tempRad;
this.tempAirIn = tempAirIn;
this.tempAirOut = tempAirOut;
}
.
.
.
Application.java : Application.java:
@SpringBootApplication
public class Application {
public static void main(String[] args) {
FrameServiceImpl frameServiceImpl = new FrameServiceImpl();
int lower = 12;
int higher = 29;
for(int i = 0; i > 10000; i++){
frameServiceImpl.save(new Frame(LocalDateTime.now().plusMinutes(i).toString(),
(Math.random() * (higher-lower)) + lower,
(Math.random() * (higher-lower)) + lower,
(Math.random() * (higher-lower)) + lower));
}
SpringApplication.run(Application.class, args);
System.out.println("Server started.");
}
}
RestController : RestController:
@RestController
public class HelloController {
@Autowired
private FrameRepository frameRepository;
@RequestMapping("/findall")
public String findAll(){
String result = "";
int i = 0;
for(Frame f : frameRepository.findAll()){
result += i + " : " + f.toString() + "</br>";
i++;
}
return "result : " + result;
}
}
Postgresql server PostgreSQL服务器
[EDIT] Now Working. [编辑]现在工作。 - FrameServiceImpl needed @Component to be @Autowired - @Autowired component doesn't work in the main function (static) - @Autowired the FrameServiceImpl, dont instantiate it. -FrameServiceImpl需要@Component为@Autowired-@Autowired组件在主要功能中不起作用(静态)-@Autowired FrameServiceImpl,请勿实例化。
In properties file I did this; 在属性文件中,我这样做了;
spring.datasource.driver-class-name=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://localhost:5432/springbootdb
spring.datasource.username=postgres
spring.datasource.password=db
spring.jpa.database-platform=postgres
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
spring.jpa.show-sql=false
and in pom; 和pom;
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
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