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SpringBoot连接数据库&整合MyBatis框架
连接Oracle需要的依赖:
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
version>11.2.0.1.0</version>
</dependency>
springBoot配置连接Oracle:
#springboot连接Oracle数据库
spring.datasource.driver-class-name = oracle.jdbc.OracleDriver
spring.datasource.url = jdbc:oracle:thin:@ip:port/key
spring.datasource.username = username
spring.datasource.password = password
我们可以使用SpringBoot自带的JdbcTemplate模板进行操作数据库:
String sql = "select * from TICKET where START_STATION = ?";
RowMapper<TicketDto> rowMapper = new BeanPropertyRowMapper<TicketDto>(TicketDto.class);
List<TicketDto> ticketDtoResultList = null;
try {
ticketDtoResultList = (List<TicketDto>) jdbcTemplate.query(sql, rowMapper,startArea);
} catch (DataAccessException e) {
logger.debug("!!!!!!!!!SQL查询出错"+e);
}
单条记录查询使用queryForObject方法;
实际上更多的是使用MyBatis框架进行操作:
整合MyBatis
引入依赖:
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.0</version>
</dependency>
编写Mapper接口:
package com.mlgg.mapper;
import com.mlgg.my12306.param.TicketDto;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import java.util.List;
@Mapper
public interface TicketMapper {
@Select("select * from TICKET where START_STATION = #{startArea} AND END_STATION = #{distArea} ")
List<TicketDto> checkTicketByStationAndTime(@Param("startArea") String startArea, @Param("distArea") String distArea, @Param("startTime") String startTime);
}
测试一下:
package com.mlgg.service;
import com.mlgg.mapper.TicketMapper;
import com.mlgg.my12306.param.TicketDto;
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 java.util.List;
@RunWith(SpringRunner.class)
@SpringBootTest
public class ServiceApplicationTests {
@Autowired
TicketMapper ticketMapper;
@Test
public void CheckTicket(){
List<TicketDto> ResultList = ticketMapper.checkTicketByStationAndTime("西安市", "北京市", "");
for (TicketDto dto: ResultList
) {
System.out.println(dto);
}
}
}
结果:
SpringBoot整合RabbitMQ
引入starter:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-amqp</artifactId>
</dependency>
SpringBoot-RabbitMQ的自动配置文件——RabbitAutoConfiguration.java 提供了自动创建Rabbit工厂ConnectionFactory,创建工厂根据的Rabbit配置在RabbitProperties.java中,将Rabbit发送和接收消息封装在RabbitTemplate.java中,将Rabbit的管理封装在AmqpAdmin.java中。
整合的时候假设我们已经入门了RabbitMQ 哈 ~
测试消息中间件
我们前面说了,Rabbit消息操作封装在RabbitTemplate中,且已经交给了Spring管理,所以我们在测试的时候将RabbitTemplate注入到测试类中,编写发布者和订阅者测试方法:
package com.mlgg.demo;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
@RunWith(SpringRunner.class)
@SpringBootTest
public class DemoApplicationTests {
@Autowired
AmqpTemplate amqpTemplate;
//Publisher
@Test
public void contextLoads() {
Map<String, Object> map = new HashMap<>();
map.put("msg", "这是第一条消息");
map.put("data", Arrays.asList("hello world"));
map.put("flag", false);
amqpTemplate.convertAndSend("exchange.direct","atguigu.news", map);
}
@Test
public void receiveLoads() throws Exception {
Object o = amqpTemplate.receiveAndConvert("atguigu.news");
if (o == null) {
throw new Exception("null");
} else {
System.out.println(o.getClass());
System.out.println(o);
}
}
}
提供者将消息进行序列化并发送,我们在管理平台上看一下发送的消息:
Payload乱码的原因是,rabbitMQ默认使用JVM序列化,我们可以通过覆写配置来实现JSON序列化:
package com.mlgg.demo.configuration;
import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.amqp.support.converter.MessageConverter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class MyAMQPConfig {
@Bean
public MessageConverter messageConverter(){
return new Jackson2JsonMessageConverter();
}
}
结果如下:
消费者在控制台根据序列化结果进行反序列化,打印了订阅到的消息,看一下测试的结果: