Database and table are not created in the SpringBoot application-CodePudding

I have checked all the dependencies and added SQL Driver as well. I am using the MYSQL database. After running the Spring Boot application DB is not created. I am using the Data Management tool in STS4.

I expect that the CitizenDB database and database table Citizen will be created because I have added all necessary properties to the application.yml configuration file

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 https://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>2.7.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    
    <groupId>com.example</groupId>
    <artifactId>CitizenService</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>CitizenService</name>
    <description>Demo project for Spring Boot</description>
    
    <properties>
        <java.version>16</java.version>
        <spring-cloud.version>2021.0.3</spring-cloud.version>
    </properties>
    
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey.contribs</groupId>
            <artifactId>jersey-apache-client4</artifactId>
            <version>1.19.4</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>2.2.3.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

application.yml:

server:
  port: 8081
    
spring:
  datasource:
    url: jdbc:mysql://localhost:3306/CitizenDB
    username: root
    password: March@031996
    driver-class-name: com.mysql.cj.jdbc.Driver  
  application:
    name: CITIZEN-SERVICE
    jpa:
     show-sql: true
     database-platform: org.hibernate.dialect.MYSQLInnoDBDialect
     generate-ddl: true  
     hibernate:
       ddl-auto: update

Entity class:

package com.example.demo.CitizenService.Entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class Citizen {

    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private int id;
    @Column
    private String name;
    @Column
    private int vaccinationId;
}

Main class:

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
@EnableDiscoveryClient
public class CitizenServiceApplication {
    public static void main(String[] args) {
        SpringApplication.run(CitizenServiceApplication.class, args);
    }
}

CodePudding user response：

You just add createDatabaseIfNotExist=true like this

spring
    datasource
        url=jdbc:mysql://localhost:3306/CitizenDB?createDatabaseIfNotExist=true

to your application.yml file

CodePudding user response：

First of all, please include well-formatted code in your question, which may be easily copy-pasted for to reproduce your issue.

Use separated code blocks for different files and types of files especially. Your application.yml configuration is completely unreadable.

Remove any text lines like enter code here package com.example.demo.CitizenService; or ENTITY CLASS:. They make your code uncompilable. Use comments and javadocs instead. However, if you don't want to do that, you may add the flag

Use code formatting in your IDE. Example for IntelliJ IDEA.

Second, please clearly specify your issue and what exactly you have done to resolve it. I'm assuming you expect that your Spring Boot application should create the database CitizenDB and the Citizen table in it.

Spring (more specifically Hibernate) doesn't create a database by default and it's a bad practice. It assumes that you already have a created database and better to create it yourself. However, if you still want to create the database automatically you may specify such flag createDatabaseIfNotExist=true in your data source URL. Example for your case:

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/CitizenDB?createDatabaseIfNotExist=true

You have to improve excluding of the DataSourceAutoConfiguration class since you want the Spring to configure everything for you. Your main class should look like this:

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient
public class CitizenServiceApplication {
    public static void main(String[] args) {
        SpringApplication.run(CitizenServiceApplication.class, args);
    }
}