springboot 整合jdbcTemplate

〇、搭建springboot环境（包括数据库的依赖）

一、添加依赖

如果导入了jpa的依赖，就不用导入jdbctemplete的依赖了jpa的依赖：

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

如果没有导入jpa的包则要导入jdbcTemplete的包:

<dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

二、配置文件

########################################################
###datasource
########################################################
spring.datasource.url = jdbc:mysql://localhost:3306/mine
spring.datasource.username = root
spring.datasource.password = root
spring.datasource.driverClassName = com.mysql.jdbc.Driver
spring.datasource.max-active=20
spring.datasource.max-idle=8
spring.datasource.min-idle=8
spring.datasource.initial-size=10

三、持久层

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

import com.xujie.pojo.User;

@Repository
public class UserDao {
    
    @Autowired
    private JdbcTemplate jdbcTemplate;
    
    public void save(User user) {
        String sql = "insert into user (uname) values (‘"+user.getUname()+"‘)";
        this.jdbcTemplate.update(sql);
    }
}

四、service

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.xujie.dao.UserDao;
import com.xujie.pojo.User;
import com.xujie.service.UserService;

@Service
public class UserServiceImpl implements UserService {
    
    @Autowired
    private UserDao userDao;

    @Override
    public void save(User user) {
        this.userDao.save(user);
    }

}

五、Controller

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import com.xujie.pojo.User;
import com.xujie.service.UserService;

@RestController
public class UserController {
    
    @Autowired
    private UserService userService;
    
    @GetMapping("/save")
    public void save() {
        User user = new User();
        user.setUname("yuanxiliu");
        this.userService.save(user);
    }
}