yxyapplication.yml文件
server : port :5001 spring : application : name : config-server profiles 3360 active : JDBC数据源3360 driver-3360 : JDBC : MySQL ://127.0.0.133603306/order test？ use unicode=truecharacterencoding=utf-8 server time zone=Asia/Shanghai username 3360 rootpassword 3360根POM文件
！ -数据库连接的jar包--- dependencygroupidorg.spring framework.boot/groupidartifactidspring-boot-starter-JDBC/artifact id dependencydependencygroupidmysql/groupidartifactidmysql-connector-Java/artifact id/dependencydencygroutour
@ springbootapplicationpublicclassconfigserverapplication (publicstaticvoidmain ) string[]args ) spring application.run }
@ getter @ setterpublicclassstudent {私有Intid； 私有字符串名称； publicinterfacestudentdao { publicstringgetusernamebyid (intid )； } @Repositorypublic class令人焦急的向日葵implementsstudentdao {//auto wired中跳跃的寒风//@Resource的作用与@Autowired相同， @Autowired按byType自动rred @ resource默认按byName自动rz dhm @ resourceprivatejdbctemplatejdbctemplate； @ overridepublicstringgetusernamebyid (intid ) returnjdbctemplate.queryforobject ) ' selectnamefromstudentwhereid=？String.class； }服务层
publicinterfacestudentservice { publicstringgetusernamebyid (intid )； } @ servicepublicclassxxdzmimplementsstudentservice { @ resourceprivatestudentdaostudentdao； @ overridepublicstringgetusernamebyid (intid ) returnstudentdao.getusername byid ) id； } }控制器层
@ rest controller @ request mapping (/mydb ) ) publicclassstudentcontroller ) @ resourceprivatestudentservicestudentservice @ Hello ) ) publicstringgetusernamebyid ) intid ) returnstudentservice.getusername byid )； }测试