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文章来源:https://blog.csdn.net/gozhuyinglong
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一、运行环境
IDE:IDEA 2018.1.1
Tomcat:8.5
数据库:MySQL
测试工具:Postman
一、创建一个SpringBoot项目
1.使用IDEA创建项目
Spring Boot版本:2.0.2
选中的依赖:Web、MySQL、JDBC
2.项目目录结构
3.pom文件内容
<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>com.demo</groupId>
<artifactId>springboot-jdbc</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springboot-jdbc</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</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.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>
</project>
二、创建数据库
创建用户表users
添加两条数据
三、配置数据库链接
application.yml
文件,并输入参数
spring datasource username root password root url jdbc mysql //127.0.0.1 3306/springboot_db driver-class-name com.mysql.jdbc.Driver
这样的配置,默认使用HikariDataSource数据源
com.zaxxer.hikari.HikariDataSource
四、实例测试
1.创建一个Controller类
此类通过Spring自带的JdbcTemplate
类来查询数据库中的数据
package com.demo.springboot.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import java.util.List; import java.util.Map; "/jdbc") (public class JdbcController { JdbcTemplate jdbcTemplate; "/list") ( public List<Map<String, Object>> queryUsers(){ List<Map<String, Object>> list = jdbcTemplate.queryForList("select * from users"); return list; } }
2.测试结果
使用Postman工具,发送 http://127.0.0.1:8080/jdbc/list
请求,返回结果如下
[ { "id": 1, "username": "xiaoming", "password": "1234", "phone": "15090909090" }, { "id": 2, "username": "mimi", "password": "123", "phone": "15222222222" } ]
如下图所示: