springbootのアプリケーション起動時に起きるエラーを解消したい

Question

Thymeleafを使った顧客情報の表示と削除、編集を行うアプリケーションの製作途中で、このエラーが起こってしまいました。

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-10-20 09:25:01.705 ERROR 12452 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:650) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
	... 20 common frames omitted
Caused by: java.lang.NullPointerException: null
	at net.sf.log4jdbc.Log4jdbcProxyDataSource.getConnection(Log4jdbcProxyDataSource.java:89) 

CustomerRepository.java

package com.example.repository;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.namedparam.BeanPropertySqlParameterSource;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
import org.springframework.jdbc.core.namedparam.SqlParameterSource;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import com.example.domain.Customer;

@Repository
@Transactional
public class CustomerRepository {
	@Autowired
	NamedParameterJdbcTemplate jdbcTemplate;
	
	private static final RowMapper<Customer> customerRowMapper = (rs,i) ->{
		Integer id = rs.getInt("id");
		String firstName = rs.getString("first_name");
		String lastName = rs.getString("last_name");
		return new Customer(id, firstName, lastName);
	};
	
	@SuppressWarnings("unchecked")
	public Page<Customer> findAll(){
		List<Customer> Customers = jdbcTemplate.query("SELECT id,first_name FROM customers ORDERBY id", customerRowMapper);
		return (Page<Customer>) Customers;
	}
	
	public Customer findOne(Integer id) {
		SqlParameterSource param = new MapSqlParameterSource().addValue("id", id);
		return jdbcTemplate.queryForObject("SELECT id,first_name,last_name  FROM customers WHEREid =:id", param, customerRowMapper);
	}
	
	public Customer save(Customer customer) {
		SqlParameterSource param = new BeanPropertySqlParameterSource(customer);
		if(customer.getId() == null) {
			jdbcTemplate.update("INSERT INTO customers (first_name,last_name) values(:firstName, :lastName,)",param);
		}else {
			jdbcTemplate.update("UPDATE customers SET first_name =:first_name, last_name =:last_name WHERE is =:id",param);
		}
		return customer;
	}
	
	public void delete(Integer id) {
		SqlParameterSource param = new MapSqlParameterSource().addValue("id", id);
		jdbcTemplate.update("DELETE FROM customers WHERE id=:id",param);
	}
}

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>2.3.4.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.example</groupId>
	<artifactId>hajiboot-thymeleaf</artifactId>
	<version>1.0.0-SNAPSHOT</version>
	<name>hajiboot-thymeleaf</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>11</java.version>
		<vaadin.version>14.4.0</vaadin.version>
	</properties>

	<dependencies>
		<dependency>
    		<groupId>org.hibernate</groupId>
   		 	<artifactId>hibernate-core</artifactId>
		</dependency>
		<dependency>
    		<groupId>org.hibernate</groupId>
    		<artifactId>hibernate-entitymanager</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-data-jpa</artifactId>
		</dependency>
		<dependency>
			<groupId>com.h2database</groupId>
			<artifactId>h2</artifactId>
		</dependency>
		<dependency>
			<groupId>org.lazyluke</groupId>
			<artifactId>log4jdbc-remix</artifactId>
			<version>0.2.7</version>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-rest</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-jersey</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-web-services</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-webflux</artifactId>
		</dependency>
		<dependency>
			<groupId>com.vaadin</groupId>
			<artifactId>vaadin-spring-boot-starter</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-rest-hal-explorer</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.session</groupId>
			<artifactId>spring-session-core</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
			<exclusions>
				<exclusion>
					<groupId>org.junit.vintage</groupId>
					<artifactId>junit-vintage-engine</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>io.projectreactor</groupId>
			<artifactId>reactor-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-configuration-processor</artifactId>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-configuration-processor</artifactId>
			<optional>true</optional>
		</dependency>
		<dependency>
       		 <groupId>javax.xml.bind</groupId>
       		 <artifactId>jaxb-api</artifactId>
		</dependency>
	</dependencies>

	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>com.vaadin</groupId>
				<artifactId>vaadin-bom</artifactId>
				<version>${vaadin.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>
				<dependencies>
					<dependency>
						<groupId>org.springframework</groupId>
						<artifactId>springloaded</artifactId>
						<version>1.2.1.RELEASE</version>
					</dependency>
				</dependencies>
			</plugin>
		</plugins>
	</build>

</project>

STSを使って作成起動は行っております
文字数制限で載せられませんがcontorollerなど別のファイルもあります。

Answer 1

Caused by: java.lang.NullPointerException: null
    at net.sf.log4jdbc.Log4jdbcProxyDataSource.getConnection(Log4jdbcProxyDataSource.java:89) 

とあるので、データベースへのコネクション取得に失敗しているみたいです。
プロパティファイルのjdbcの設定が正しいかどうか、確認してみてください。

Comments

[kusogomitan]

プロパティファイルへの記述間違っていました、ありがとうございます。
直した上で起動したら
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.NullPointerException
とCaused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:650) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
... 20 common frames omitted
Caused by: java.lang.NullPointerException: null
at net.sf.log4jdbc.Log4jdbcProxyDataSource.getConnection(Log4jdbcProxyDataSource.java:89) ~[log4jdbc-remix-0.2.7.jar:na]
といったエラーが発生しました。

[deaf_tadashi]

Log4jdbcProxyDataSource.getConnection(Log4jdbcProxyDataSource.java:89) でエラーが出ているので、引き続き接続設定が何か間違っているのだと思います。怪しいところを確認して潰していくしかないと思います。