目錄

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基本概念

演示及代碼

如果有亂碼

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基本概念

在Spring Boot調用JDBC時默認是用org.apache.tomcat.jdbc.pool.DataSource作為數據源；數據源的相關配置都在DataSourceProperties里面；

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演示及代碼

瀏覽器訪問如下：

數據庫數據如下：

程序結構如下：

源碼如下：

HelloController.java

package jdbcdemo.demo.controller;import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.ResponseBody;import java.util.List; import java.util.Map;@Controller public class HelloController {@AutowiredJdbcTemplate jdbcTemplate;@ResponseBody@GetMapping("/query")public Map<String, Object> map(){List<Map<String, Object>> list = jdbcTemplate.queryForList("select * from department");return list.get(0);} }

application.yml

spring:datasource:username: rootpassword: 123456url: jdbc:mysql://192.168.164.141:3306/jdbcdriver-class-name: com.mysql.jdbc.Driver

porn.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 http://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>1.5.19.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>JDBCDemo</groupId><artifactId>demo</artifactId><version>0.0.1-SNAPSHOT</version><name>demo</name><description>Demo project for Spring Boot</description><properties><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>

數據庫代碼：

/* SQLyog Ultimate v11.24 (32 bit) MySQL - 5.5.62 : Database - jdbc ********************************************************************* *//*!40101 SET NAMES utf8 */;/*!40101 SET SQL_MODE=''*/;/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */; /*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */; /*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */; /*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */; CREATE DATABASE /*!32312 IF NOT EXISTS*/`jdbc` /*!40100 DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci */;USE `jdbc`;/*Table structure for table `department` */DROP TABLE IF EXISTS `department`;CREATE TABLE `department` (`id` int(11) NOT NULL,`departmentName` varchar(50) COLLATE utf8_unicode_ci NOT NULL,PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;/*Data for the table `department` */insert into `department`(`id`,`departmentName`) values (0,'開發部');/*!40101 SET SQL_MODE=@OLD_SQL_MODE */; /*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */; /*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */; /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

Docker相關命令如下：

ip addr docker images docker ps docker run -p 3306:3306 --name mysql01 -e MYSQL_ROOT_PASSWORD=123456 -d mysql:5.5

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如果有亂碼

如果瀏覽器有亂碼，一般是編碼不統一的問題：

IDEA的編碼選擇UTF8如下：

數據庫也選擇UTF8編碼：

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