增加 数据库连接 示例

client-resume-server/pom.xml

@@ -32,16 +32,16 @@
         <!-- MyBatis-Plus -->
         <dependency>
             <groupId>com.baomidou</groupId>
-            <artifactId>mybatis-plus-extension</artifactId>
+            <artifactId>mybatis-plus-boot-starter</artifactId>
             <version>${mybatis-plus.version}</version>
         </dependency>
 
-<!--        <dependency>-->
-<!--            <groupId>mysql</groupId>-->
-<!--            <artifactId>mysql-connector-java</artifactId>-->
-<!--            <scope>runtime</scope>-->
-<!--        </dependency>-->
-<!--        -->
+
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <scope>runtime</scope>
+        </dependency>
 
     </dependencies>
 </project>
\ No newline at end of file

client-resume-server/src/main/java/com/gzicloud/industry/client/resume/dao/ResumeMapper.java

 package com.gzicloud.industry.client.resume.dao;
 
+import com.gzicloud.industry.client.resume.entity.ResumePO;
+import org.apache.ibatis.annotations.Mapper;
+
+@Mapper
 public interface ResumeMapper {
+
+    ResumePO getCountry(Long id);
+
 }

client-resume-server/src/main/java/com/gzicloud/industry/client/resume/entity/ResumePO.java

+package com.gzicloud.industry.client.resume.entity;
+
+import lombok.Data;
+
+@Data
+public class ResumePO {
+
+    private Long id;
+
+    private String country;
+
+}

client-resume-server/src/main/java/com/gzicloud/industry/client/resume/service/impl/ResumeServiceImpl.java

 package com.gzicloud.industry.client.resume.service.impl;
 
+import com.gzicloud.industry.client.resume.dao.ResumeMapper;
 import com.gzicloud.industry.client.resume.service.IResumeService;
 import org.springframework.stereotype.Service;
 
+import javax.annotation.Resource;
+
 @Service
 public class ResumeServiceImpl implements IResumeService {
 
+    @Resource
+    private ResumeMapper resumeMapper;
 
     @Override
     public String getName(Long id) {
-        return "spring bean 类中返回的：" + id;
+        return "spring bean 类中返回的：" + resumeMapper.getCountry(id).getCountry();
     }
 }

client-resume-server/src/main/resources/application-dev.yml

@@ -12,14 +12,19 @@ spring:
         group: DEFAULT_GROUP  # 默认分组就是DEFAULT_GROUP，如果使用默认分组可以不配置
         file-extension: yml   #默认properties
   datasource:
+    driver-class-name: com.mysql.cj.jdbc.Driver
+    username: hanchao
+    password: 123123
+    url: jdbc:mysql://localhost:3306/db2020?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=GMT%2B8
     hikari:
-      jdbc-url: jdbc:mysql://localhost:3306/db2020?useUnicode=true&characterEncoding=utf-8&useSSL=false&allowMultiQueries=true&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true
-      username: hanchao
-      password: 123123
-      driver-class-name: com.mysql.cj.jdbc.Driver
       minimum-idle: 10
-      maximum-pool-size: 20
-      connection-timeout: 2000
+      maximum-pool-size: 15
+      connection-timeout: 1000
+
+mybatis-plus:
+  configuration:
+    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
+  mapper-locations: classpath:/mapper/*Mapper.xml
 
 dubbo:
   scan:

client-resume-server/src/main/resources/mapper/ResumeMapper.xml

+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.gzicloud.industry.client.resume.dao.ResumeMapper">
+
+    <select id="getCountry" parameterType="java.lang.Long" resultType="com.gzicloud.industry.client.resume.entity.ResumePO">
+        select id, country from t_country where id = #{id}
+    </select>
+</mapper>
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