1 Environmental ready
Database using MySQL, we first create a project and then import the MySQL driver SpringBoot:
<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 test code
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 executed sql statement
DataSourceInitializer: ApplicationListener; can help us execute sql statement, but need to name the file: schema.sql, data-.sql
default rules: schema.sql, schema-all.sql; ( DataSourceProperties this class is the default configuration)
DataSourceInitializer role:
1)、runSchemaScripts();运行建表语句;
2)、runDataScripts();运行插入数据的sql语句;
- Examples;
-
Then add pom
# 如果你配置文件没有指定执行文件的名称而是使用默认的schema.sql或者schema-all.sql的话 # 就在配置文件中加上spring.datasource.initialization-mode=always initialization-mode: always
-
Let us put resources directory 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,'业务部'); INSERT INTO department(id,departmentName) VALUES(2,'前台部');
-
View Results
mysql> select * from department; +----+----------------+ | id | departmentName | +----+----------------+ | 1 | 业务部 | | 2 | 前台部 | +----+----------------+ 2 rows in set (0.00 sec) ---------------------
-
Write controller testing
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中已经给我们注册好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); } }
Access http://localhost:8080/hello
:{"id":1,"departmentName":"业务部"}
- Custom sql execution
#可以使用
schema:
- classpath:department.sql
is a list schema can be used -
to specify a plurality of positions