1.导入依赖
pom.xml
<dependencies>
<!-- Mybatis依赖--><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.7</version></dependency>
<!-- Mysql依赖--><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.30</version></dependency>
<!-- 测试依赖--><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope></dependency></dependencies>
2.在Resource下面创建Mybatis-config.xml
并把下面内容复制进去，然后配置数据库连接信息
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""https://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration><environments default="development"><environment id="development"><transactionManager type="JDBC"/><dataSource type="POOLED"><property name="driver" value="${driver}"/><property name="url" value="${url}"/><property name="username" value="${username}"/><property name="password" value="${password}"/></dataSource></environment></environments><mappers><mapper resource="org/mybatis/example/BlogMapper.xml"/></mappers>
</configuration>
3.创建Mapper接口
MyBatis中的mapper接口相当于以前的Dao但是区别在于，mapper仅仅是接口，我们不需要提供实现类。
实体类
package com.mybatis.Bean;public class User {private Integer id;private String username;private String password;private Integer age;public User(Integer id, String username, String password, Integer age) {this.id = id;this.username = username;this.password = password;this.age = age;}public User() {}public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}
}Mapper类
package com.mybatis.Mapper;public interface UserMapper {}项目结构图
