无法访问此站点 localhost 拒绝连接.在空项目上 [英] This site can’t be reached localhost refused to connect. on empty project

问题描述

我的本​​地主机没有加载页面:

My localhost does not load the page:

http://localhost:8080/ 
This site can’t be reached 
localhost refused to connect.

我有一个全新的项目，当我运行该项目时，我没有收到任何错误或看到任何错误，但是当我尝试使用本地主机查看时，我看到了上述错误

I have a brand new project and when I run the project I don't get any errors or see any errors but when I try to view using the localhost I see the above error

这是我的项目的详细信息.

Here is the detail on my project.

我机器上的 Java 版本:

Java version on my machine:

C:\WINDOWS\system32>java -version java 版本1.8.0_121"；Java(TM) SE 运行时环境(构建 1.8.0_121-b13)Java HotSpot(TM) 64 位服务器 VM(构建 25.121-b13，混合模式)

C:\WINDOWS\system32>java -version java version "1.8.0_121" Java(TM) SE Runtime Environment (build 1.8.0_121-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)

我不知道我在这里做错了什么，而且除了我运行的这个类之外我什么都没有:

I have no idea what I'm doing wrong here, and again I have nothing except this class which I run:

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

我的 POM 文件:

4.0.0org.springframework.bootspring-boot-starter-parent2.4.2com.example演示0.0.1-快照演示Spring Boot 演示项目

4.0.0 org.springframework.boot spring-boot-starter-parent 2.4.2 com.example demo 0.0.1-SNAPSHOT demo Demo project for Spring Boot

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

<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.postgresql</groupId>
        <artifactId>postgresql</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>

应用日志:

2021-01-16 19:24:07.268 INFO 23308 --- [主要]com.example.demo.DemoApplication : 启动 DemoApplication在具有 PID 23308 的 XPS8910 上使用 Java 13.0.2(C:\Users\nick\eclipse-workspace\demo\target\classes 由XPS89100 在 C:\Users\nick\eclipse-workspace\demo) 2021-01-1619:24:07.270 信息 23308 --- [主要]com.example.demo.DemoApplication :未设置活动配置文件，回退到默认配置文件:默认 2021-01-16 19:24:07.740信息 23308 --- [主要].s.d.r.c.RepositoryConfigurationDelegate :引导 Spring 数据默认模式下的 JPA 存储库.2021-01-16 19:24:07.752 信息 23308--- [ main] .s.d.r.c.RepositoryConfigurationDelegate :在 4 毫秒内完成 Spring Data 存储库扫描.找到 0 个 JPA存储库接口.2021-01-16 19:24:08.143 信息 23308 --- [
main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat 初始化带端口:8080 (http) 2021-01-16 19:24:08.151 INFO 23308 --- [
main] o.apache.catalina.core.StandardService : 启动服务[Tomcat] 2021-01-16 19:24:08.151 INFO 23308 --- [主要]org.apache.catalina.core.StandardEngine :启动 Servlet 引擎:[Apache Tomcat/9.0.41] 2021-01-16 19:24:08.274 INFO 23308 --- [
main] o.a.c.c.C.[Tomcat].[localhost].[/] : 初始化 Spring嵌入式 WebApplicationContext 2021-01-16 19:24:08.274 INFO 23308 ---[主要] w.s.c.ServletWebServerApplicationContext : 根WebApplicationContext:初始化在 961 毫秒内完成 2021-01-1619:24:08.429 信息 23308 --- [主要]o.hibernate.jpa.internal.util.LogHelper:HHH000204:处理PersistenceUnitInfo [名称:默认] 2021-01-16 19:24:08.473 INFO23308 --- [主要] org.hibernate.Version :HHH000412:Hibernate ORM 核心版本 5.4.27.Final 2021-01-1619:24:08.586 信息 23308 --- [主要]o.hibernate.annotations.common.Version : HCANN000001: Hibernate公共注释 {5.1.2.Final} 2021-01-16 19:24:08.670 INFO 23308--- [主要] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - 开始...

2021-01-16 19:24:07.268 INFO 23308 --- [ main] com.example.demo.DemoApplication : Starting DemoApplication using Java 13.0.2 on XPS8910 with PID 23308 (C:\Users\nick\eclipse-workspace\demo\target\classes started by XPS89100 in C:\Users\nick\eclipse-workspace\demo) 2021-01-16 19:24:07.270 INFO 23308 --- [ main] com.example.demo.DemoApplication : No active profile set, falling back to default profiles: default 2021-01-16 19:24:07.740 INFO 23308 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode. 2021-01-16 19:24:07.752 INFO 23308 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 4 ms. Found 0 JPA repository interfaces. 2021-01-16 19:24:08.143 INFO 23308 --- [
main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http) 2021-01-16 19:24:08.151 INFO 23308 --- [
main] o.apache.catalina.core.StandardService : Starting service [Tomcat] 2021-01-16 19:24:08.151 INFO 23308 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.41] 2021-01-16 19:24:08.274 INFO 23308 --- [
main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2021-01-16 19:24:08.274 INFO 23308 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 961 ms 2021-01-16 19:24:08.429 INFO 23308 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default] 2021-01-16 19:24:08.473 INFO 23308 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.27.Final 2021-01-16 19:24:08.586 INFO 23308 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final} 2021-01-16 19:24:08.670 INFO 23308 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...

推荐答案

看起来 spring 应用程序没有完全启动并在启动 Hikari Pool 时冻结(日志中的最后一行).

It looks like spring application didn't start completely and freezes on starting Hikari Pool (last line in your log).

Hikari 池是一个数据库连接池.这可能意味着您的 application.properties 中的数据库连接设置不正确，无法建立连接.

Hikari pool is a database connection pool. This probably means that the DB connection settings in your application.properties are incorrect and connection can't be established.

您能否验证数据库是否正在运行并在您配置的数据源 URL 上做出响应?

Can you verify that database is running and responding on the datasource URL you configured?

这篇关于无法访问此站点 localhost 拒绝连接.在空项目上的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！