springboot整合Junit,Mybatis,Mybatis-Plus,Druid
篇幅有点长，所以把总结写在开头：
springboot整合第三方万能公式：
1.新建工程时选择需要的starter或者手动添加对应的starter
2.配置对应的设置或者采用默认配置
一、springboot整合junit
1.导入Junit坐标到pom.xml(创建springboot工程时将自动导入此坐标，我们只需要检查一下就好了)
org.springframework.boot
spring-boot-starter-test
test
2.编写dao层数据
注意：启动类和测试类要放在同一个包路径下，否则在编译时会出错
二、springboot整合MyBatis
1.最最关键的一步就是在创建工程的时候选择MyBatis Framework以及MySQL Driver
可以检查一下pom文件
2.编写配置文件，数据源
spring:
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/heima
username: root
password: root
放一下数据库数据~
开始使用
编写实体类
public class book {
private int id;
private String type;
private String name;
private String description;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
@Override
public String toString() {
return "book{" +
"id=" + id +
", type='" + type + '\'' +
", name='" + name + '\'' +
", description='" + description + '\'' +
'}';
}
}
编写dao层
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
@Mapper
public interface bookDao {
@Select("select * from heima1 where id =#{id}")
public book getById(Integer id);
}
在测试类中进行测试：
@SpringBootTest
class Springboot07MybatisApplicationTests {
@Autowired
private com.ws.springboot_07_mybatis.dao.bookDao bookDao;
@Test
void contextLoads() {
System.out.println(bookDao.getById(1));
}
}成功！！！！
三、springboot整合MyBatis -Puls
1.需要找MyBatis -Puls在下面的链接中Maven Repository: Search/Browse/Explore (mvnrepository.com)
选择一个版本点击进入，复制maven内容
粘贴进入工程的pom文件，刷新
2.编写配置文件
spring:
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/heima
username: root
password: root
3.编写实体类
package com.ws.domain;
public class heima1 {
private int id;
private String type;
private String name;
private String description;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
@Override
public String toString() {
return "book{" +
"id=" + id +
", type='" + type + '\'' +
", name='" + name + '\'' +
", description='" + description + '\'' +
'}';
}
}
4.编写dao层（注意；这里的@Mapper和继承的BaseMapper<实体类>是mybatis-plus的关键之一），接下来什么方法也不用写，mybatis-plus已经帮你写好了！！！
package com.ws.dao;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.ws.domain.heima1;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface bookDao extends BaseMapper {
}
5.进行测试
package com.ws;
import com.ws.dao.bookDao;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
@SpringBootTest
class Springboot08MybatisplusApplicationTests {
@Autowired
private com.ws.dao.bookDao bookDao;
@Test
void contextLoads() {
System.out.println(bookDao.selectById(2));
}
}
都是增删改查方法，需要大家自己去探索
好了，看测试结果，成功！！！！
四、SpringBoot整合Druid
1.需要找Druid在下面的链接中Maven Repository: Search/Browse/Explore (mvnrepository.com)
进行复制
粘贴进入pom文件，刷新
连接数据源
编写实体类
package com.ws.domin;
public class book {
private int id;
private String type;
private String name;
private String description;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
@Override
public String toString() {
return "book{" +
"id=" + id +
", type='" + type + '\'' +
", name='" + name + '\'' +
", description='" + description + '\'' +
'}';
}
}
编写dao层
package com.ws.dao;
import com.ws.domin.book;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
@Mapper
public interface bookDao {
@Select("select * from heima1 where id =#{id}")
public book getById(Integer id);
}
编写测试类
package com.ws;
import com.ws.dao.bookDao;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
@SpringBootTest
class Springboot08DruidApplicationTests {
@Autowired
private bookDao bookDao;
@Test
void contextLoads() {
System.out.println(bookDao.getById(1));
}
}
运行，测试成功！！！
