使用 Spring Boot 创建 REST API [重复]

Posted 2023-02-26

【中文标题】使用 Spring Boot 创建 REST API [重复]

【英文标题】：Create a REST API with Spring Boot [duplicate]

【发布时间】：2020-11-12 00:22:16

【问题描述】：

我在 Spring 中创建了一个餐厅预订应用程序，但是当我作为 Java 应用程序运行时，它显示：

未能配置数据源：未指定“url”属性，并且无法配置嵌入式数据源。 原因：无法确定合适的驱动类

正在使用的 pom.xml 文件：

<?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>2.4.0-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.codebydarko</groupId>
    <artifactId>reservation-microservice</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>reservation-microservice</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>14</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.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </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> 
                <configuration>
                <executable>true</executable>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </repository>
        <repository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </pluginRepository>
        <pluginRepository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

</project>

Spring Boot 应用程序：

package com.codebydarko;

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

@SpringBootApplication
public class ReservationMicroserviceApplication 

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

【问题讨论】：

这能回答你的问题吗？ Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured

【参考方案1】：

当您在 maven 文件中添加此依赖项 spring-boot-starter-data-jpa 时，spring 会在 application.properties 文件中搜索 spring.datasource.url 配置。

需要在application.properties中定义