完成基本数据库查询

src/main/java/com/cxyxiaomo/flashsale/App.java

@@ -1,20 +1,36 @@
 package com.cxyxiaomo.flashsale;
 
+import com.cxyxiaomo.flashsale.dao.userDataObjectMapper;
+import com.cxyxiaomo.flashsale.dataobject.userDataObject;
+import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
 /**
  * Hello world!
  */
-@EnableAutoConfiguration // 将这个App的启动类当成一个自动化，可支持配置的Bean，并且能够开启整个一个工程类的基于SpringBoot的一个自动化配置
+// @EnableAutoConfiguration // 将这个App的启动类当成一个自动化，可支持配置的Bean，并且能够开启整个一个工程类的基于SpringBoot的一个自动化配置
+@SpringBootApplication(scanBasePackages = {"com.cxyxiaomo.flashsale"})
 @RestController
+@MapperScan("com.cxyxiaomo.flashsale.dao") // 设置DAO存放路径
 public class App {
 
+    @Autowired
+    private userDataObjectMapper userDOMapper;
+
+
     @RequestMapping("/")
     public String home() {
-        return "Hello world!";
+        userDataObject userDO = userDOMapper.selectByPrimaryKey(1);
+        if (userDO == null) {
+            return "用户对象不存在！";
+        } else {
+            return userDO.getName();
+        }
     }
 
     public static void main(String[] args) {

src/main/resources/application.properties

@@ -1,7 +1,6 @@
 
 server.port=8090
 
-#mybatis.mapper-locations=classpath:mapping/*.xml
 mybatis.mapperLocations=classpath:mapping/*.xml
 
 spring.datasource.name=flashsale
@@ -9,4 +8,6 @@ spring.datasource.url=jdbc:mysql://127.0.0.1:3306/flashsale
 spring.datasource.username=root
 spring.datasource.password=111111
 
-# 使用druid数据源
+# 使用druid数据源
+spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
+spring.datasource.driverClassName=com.mysql.jdbc.Driver