不废话,先来代码
pom文件:
<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>test</groupId> <artifactId>test</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>test</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> <version>1.4.2.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> <version>1.4.2.RELEASE</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.21</version> </dependency> </dependencies> </project>
配置文件:application.properties(springboot框架默认使用这个名字,放在resources下面)
spring.datasource.url=jdbc:mysql://localhost:3306/service_lucky_draw?autoReconnect=true&useUnicode=true&characterEncoding=utf-8 spring.datasource.username=root spring.datasource.password=1234 spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.application.name = @[email protected] server.port=33333
启动类:
package versionUpdate; import java.util.List; import java.util.Map; import org.apache.log4j.Logger; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.CommandLineRunner; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.jdbc.core.JdbcTemplate; @SpringBootApplication public class ApplicationMain implements CommandLineRunner { private Logger log = Logger.getLogger(ApplicationMain.class); @Autowired private JdbcTemplate jdbcTemplate; public static void main(String[] args) { SpringApplication springApplication = new SpringApplication(ApplicationMain.class); springApplication.run(args); } @Override public void run(String... args) throws Exception { String queryMerchandiseInfoSql = "SELECT id,worth,channel_id,template_id FROM merchandise_info"; List<Map<String, Object>> list = jdbcTemplate.queryForList(queryMerchandiseInfoSql); log.debug(list); } }
至此一个简单的SpringBoot+Jdbctemplate+MYSQL的DEMO搭建完成;
但是!!!问题来了,在启动文件中自动注入Jdbctemplate是OK的,可是在下面的代码中使用注入的时候Jdbctemplate是null这是为什么呢? 目前找问题中,期待解决,还是boot用的不熟练呀
package versionUpdate; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.stereotype.Service; @Service public class Movedata { @Autowired private static JdbcTemplate jdbcTemplate ; public static void ccc(){ System.out.println("++++++++++++++++++"+jdbcTemplate.queryForMap("SELECT * FROM channel_info WHERE channel_id = ? ","ios")); } }
时间: 2024-12-25 00:43:25