SpringBoot整合Mybatis-Plus
文章目录
- SpringBoot整合Mybatis-Plus
-
- 一、环境配置
-
-
- 1、IDEA导入插件
- 2、数据库导入数据
- 3、导入依赖
-
- 二、测试数据源和数据库连接情况
-
-
- 1、application.yaml
- 2、在测试类test一下
- 3、显示效果
-
- 三、编写代码
-
-
- 1、pojo实体类
- 2、mapper接口类
- 3、service业务逻辑层
- 4、controller控制层
- 5、index前端页面
-
- 四、最终效果
SpringBoot整合Mybatis-Plus
一、环境配置
1、IDEA导入插件
2、数据库导入数据
DROP DATABASE IF EXISTS mp;
CREATE DATABASE mp;
USE mp;
CREATE TABLE user(
id int(20) AUTO_INCREMENT PRIMARY KEY COMMENT '主键ID',
name varchar(55) NOT NULL,
age int(10) NOT NULL COMMENT '年龄',
email varchar(50) NOT NULL COMMENT '邮箱'
)ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO user(id,name,age,email) VALUES
(1,'张三',18,'[email protected]'),
(2,'李四',19,'[email protected]'),
(3,'王五',20,'[email protected]'),
(4,'赵六',21,'[email protected]');
3、导入依赖
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>com.baomidougroupId>
<artifactId>mybatis-plus-boot-starterartifactId>
<version>3.5.1version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>1.2.8version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-thymeleafartifactId>
<version>2.7.3version>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<version>1.18.22version>
dependency>
注意一点：
Mybatis-plus把我们的SqlSessionFactory、mapperLocations都已自动配置好。
- 默认值：classpath*：/mapper/**/.xml
建议以后sql映射文件，放在resources资源包下mapper里面
- @Mapper标注的接口也会被自动扫描
二、测试数据源和数据库连接情况
1、application.yaml
# 数据库数据源
spring:
datasource:
username: root
password: 123456
# 假如时区报错了，就增加一个时区的配置就行了， serverTimezone=UTC
url: jdbc:mysql://localhost:3306/mp?useSSL=false&useUnicode=true&characterEncoding=utf-8
driver-class-name: com.mysql.cj.jdbc.Driver
2、在测试类test一下
@SpringBootTest
public class MyTest {
@Autowired
DataSource dataSource;
@Test
void contextLoads() throws SQLException {
//查看一下默认数据源
System.out.println(dataSource.getClass());
//获得数据库连接
Connection connection = dataSource.getConnection();
System.out.println(connection);
//关闭
connection.close();
}
}
3、显示效果
显示效果如下，表示目前为止：数据源和数据库连接情况一切正常！
三、编写代码
项目结构体系：
1、pojo实体类
@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
private Integer id;
private String name;
private String age;
private String email;
}
2、mapper接口类
@Repository
@Mapper
public interface UserMapper extends BaseMapper<User> {
}
3、service业务逻辑层
UserService接口
public interface UserService extends IService<User> {
}
UserServiceImpl接口实现类
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper,User> implements UserService{
}
4、controller控制层
@Controller
public class UserController {
@Autowired
UserService userService;
@RequestMapping({"/", "/index"})
public String test1(Model model) {
List<User> list = userService.list();
model.addAttribute("users", list);
return "index";
}
}
5、index前端页面
DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>首页title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/semantic.min.css">
head>
<body>
<div class="ui container" style="margin-top: 40px !important;">
<form class="ui attached form segment" th:action="@{/}" method="post" style="display: inline-block !important;" >
<input name="name" type="text" style="width: 200px;height: 35px;" placeholder="输入用户名查找">
<button class="ui blue button" type="submit">搜索button>
<a href="#" class="ui button teal" style="margin-left: 30px !important;">新增a>
form>
<table class="ui celled attached table">
<thead>
<tr>
<th>编号th>
<th>姓名th>
<th>年龄th>
<th>邮箱th>
<th>操作th>
tr>
thead>
<tbody>
<tr th:each="user:${users}">
<td th:text="${user.id}">Jamestd>
<td th:text="${user.name}">24td>
<td th:text="${user.age}">Engineertd>
<td th:text="${user.email}">[email protected]td>
<td>
<a href="#"> <button class="ui primary button">修改button>a>
<a href="#"> <button class="ui pink button">删除button>a>
td>
tr>
tbody>
table>
div>
body>
html>
四、最终效果
SpringBoot整合Mybatis—Plus基本上就完成了，想必大家在此页面上扩展增删改查已不是什么难题了！
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