Spring boot整合Mybatis（注解版）

Spring Boot整合Druid数据库连接池

最新推荐文章于 2025-07-31 19:23:37 发布

好好学习天天向上W

最新推荐文章于 2025-07-31 19:23:37 发布

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本文链接：https://blog.youkuaiyun.com/qq_41458842/article/details/99291573

本文详细介绍了如何在Spring Boot项目中整合Druid数据库连接池，包括配置Maven依赖、设置YAML数据库参数、编写DruidConfig类、创建JavaBean、Mapper接口及Controller，实现数据库操作并进行监控。

1.在pom文件中导入相关的maven依赖

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/log4j/log4j -->
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.17</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.16.18</version>
        <scope>provided</scope>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.1.19</version>
    </dependency>

    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>2.1.0</version>
    </dependency>

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
</dependencies>

2.在yml文件中配置数据库信息

spring:
  datasource:
    username: root
    password: 123456
    url: jdbc:mysql://localhost:3306/user?serverTimezone=UTC  # 我的时区一直出错，调整时区。
    drive-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource              # 利用type属性换成 Druid的数据源，毕竟阿里爸爸，还有监控什么的

    # 下面的是配置Druid数据源的信息
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
    #   配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

3.写DruidConfig让配置的Druid生效

@Configuration
public class DruidConfig {

    //令yml文件中其他的配置生效
    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druid(){
        return new DruidDataSource();
    }

    //配置Druid的监控
    //1、配置一个管理后台的Servlet
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        Map<String,String> initParams = new HashMap<>();

        initParams.put("loginUsername","admin");
        initParams.put("loginPassword","123456");
        initParams.put("allow","");//默认就是允许所有访问
        bean.setInitParameters(initParams);
        return bean;
    }


    //2、配置一个web监控的filter
    @Bean
    public FilterRegistrationBean webStatFilter(){
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());

        Map<String,String> initParams = new HashMap<>();
        initParams.put("exclusions","*.js,*.css,/druid/*");

        bean.setInitParameters(initParams);

        bean.setUrlPatterns(Arrays.asList("/*"));

        return  bean;
    }
}

4.在model下写相应的JavaBean

5.在mapper下写相应的操作数据库的Mapper文件

//指示这是一个操作数据库的 Mapper
@Mapper
public interface UserMapper {

    @Delete("delete from zuser where id=#{id}")
    public void DeleteUser(int id);

    @Select("select * from zuser where id=#{id}")
    public  user FindUser(int id);

    @Insert("insert into zuser(id,username,password,type,money) values(#{id}, #{username},#{password},#{type},#{money})")
    public void AddUser(user user);

    @Update("update zuser  set username=#{username},password=#{password}, type=#{type}, money=#{money} where id=#{id}")
    public void UpdateUser(user user);

}

6.写相应的Controller

@RestController
public class UserController {

    @Autowired
    JdbcTemplate jdbcTemplate;

    @Autowired
    UserMapper u;

    //利用Spring Boot中的JdbcTempalte来操作数据库
    @RequestMapping("/mapping")
    public List<Map<String, Object>> getuser(){
        List<Map<String, Object>> list=jdbcTemplate.queryForList("select * from zuser");
        return list;
    }

    //利用@PathVariable来获取输入的id值返回相应的user对象
    @RequestMapping("/getuserbyid/{id}")
    public user getuserbyid(@PathVariable("id") int id){
        return u.FindUser(id);
    }

    @RequestMapping("/deleteuserbyid/{id}")
    public void deleteuserbyid(@PathVariable("id") int id){
        u.DeleteUser(id);
    }

    @RequestMapping("/insertuser")
    public user insertuser(user uu){
        u.AddUser(uu);
        return uu;
    }    
   
    @RequestMapping("/updateuser")
    public user updateuser(user uu){
        u.UpdateUser(uu);
        return uu;
    }
    
}

7.运行程序测试