加坐标可以使用https://mvnrepository.com/来查找
先加以下坐标：
使用的数据库介绍：
配置连接数据库：
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/spring?serverTimezone=UTC
username: root
password: 123456
定义类：
package com.spring1.domain;
import com.baomidou.mybatisplus.annotation.TableName;
@TableName("student")
public class student {
private Integer id;
private String name;
private String age;
@Override
public String toString() {
return "student{" +
"id=" + id +
", name='" + name + '\'' +
", age='" + age + '\'' +
'}';
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
}
测试：
package com.spring1;
import com.spring1.dao.StudentDao;
import com.spring1.domain.student;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
@SpringBootTest
class Spring1ApplicationTests {
@Autowired
private StudentDao studentDao;
@Test
void contextLoads() {
System.out.println(studentDao.selectList(null));
}
}
[student{id=1000, name='Li Ming', age='22'}, student{id=1001, name='Danny', age='17'}, student{id=1002, name='Li Gang', age='22'}, student{id=1003, name='Jenny', age='19'}, student{id=1004, name='Jim', age='19'}]
添加druid
添加坐标：
配置修改：
spring:
datasource:
druid:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/spring?serverTimezone=UTC
username: root
password: 123456
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