1 環境準備
數據庫使用MySQL,我們先創建一個SpringBoot項目再導入MySQL驅動:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
spring:
datasource:
username: root
password: 123456
url: jdbc:mysql://192.168.137.140:3306/mysql
driver-class-name: com.mysql.jdbc.Driver
2 測試代碼
package cn.zhangyu;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.SQLException;
import static sun.misc.Version.println;
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringbootJdbcApplicationTests {
@Autowired
DataSource dataSource;
@Test
public void contextLoads() throws SQLException {
Connection connection = dataSource.getConnection();
System.out.println(connection);
connection.close();
}
}
3 執行sql語句
DataSourceInitializer:ApplicationListener;可以幫助我們執行sql語句,但是需要將文件命名爲:schema-.sql、data-.sql
默認規則:schema.sql,schema-all.sql;(DataSourceProperties這個類進行了默認的配置)
DataSourceInitializer作用:
1)、runSchemaScripts();運行建表語句;
2)、runDataScripts();運行插入數據的sql語句;
- 實例;
-
再pom中添加
# 如果你配置文件沒有指定執行文件的名稱而是使用默認的schema.sql或者schema-all.sql的話 # 就在配置文件中加上spring.datasource.initialization-mode=always initialization-mode: always
-
我們再resources目錄下放入schema.sql
SET FOREIGN_KEY_CHECKS=0; -- ---------------------------- -- Table structure for department -- ---------------------------- DROP TABLE IF EXISTS `department`; CREATE TABLE `department` ( `id` int(11) NOT NULL AUTO_INCREMENT, `departmentName` varchar(255) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8; INSERT INTO department(id,departmentName) VALUES(1,'業務部'); INSERT INTO department(id,departmentName) VALUES(2,'前臺部');
-
查看結果
mysql> select * from department; +----+----------------+ | id | departmentName | +----+----------------+ | 1 | 業務部 | | 2 | 前臺部 | +----+----------------+ 2 rows in set (0.00 sec) ---------------------
-
編寫controller 進行測試
package cn.zhangyu; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; import java.util.List; import java.util.Map; /** * Created by grace on 2018/11/28. */ @RestController public class HelloController { //spring boot中已經給我們註冊好JdbcTemplate @Autowired JdbcTemplate jdbcTemplate; @GetMapping("/hello") public Map<String,Object> getDepartment(){ List<Map<String, Object>> list = jdbcTemplate.queryForList("select * from department"); return list.get(0); } }
訪問http://localhost:8080/hello
:{"id":1,"departmentName":"業務部"}
- 自定義sql執行
#可以使用
schema:
- classpath:department.sql
schema是一個list所以可以使用-
指定多個位置