搭建MyBatis框架之创建mapper接口（四）

创建mysql表

dart 复制代码

CREATE TABLE t_user (
    id INT NOT NULL AUTO_INCREMENT COMMENT '主键ID',
    username VARCHAR(20) COMMENT '用户名',
    password VARCHAR(20) COMMENT '密码',
    age INT COMMENT '年龄',
    sex CHAR(1) COMMENT '性别（如"男/女"）', 
    email VARCHAR(50) COMMENT '邮箱',
    PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

创建实体类

dart 复制代码

package com.baidu.mybatis.pojo;

public class User {
    private Integer id;
    private String username;
    private String password;
    private Integer age;
    private String sex;
    private String email;


    public User() {
    }

    public User(Integer id, String username, String password, Integer age, String sex, String email) {
        this.id = id;
        this.username = username;
        this.password = password;
        this.age = age;
        this.sex = sex;
        this.email = email;
    }

    /**
     * 获取
     * @return id
     */
    public Integer getId() {
        return id;
    }

    /**
     * 设置
     * @param id
     */
    public void setId(Integer id) {
        this.id = id;
    }

    /**
     * 获取
     * @return username
     */
    public String getUsername() {
        return username;
    }

    /**
     * 设置
     * @param username
     */
    public void setUsername(String username) {
        this.username = username;
    }

    /**
     * 获取
     * @return password
     */
    public String getPassword() {
        return password;
    }

    /**
     * 设置
     * @param password
     */
    public void setPassword(String password) {
        this.password = password;
    }

    /**
     * 获取
     * @return age
     */
    public Integer getAge() {
        return age;
    }

    /**
     * 设置
     * @param age
     */
    public void setAge(Integer age) {
        this.age = age;
    }

    /**
     * 获取
     * @return sex
     */
    public String getSex() {
        return sex;
    }

    /**
     * 设置
     * @param sex
     */
    public void setSex(String sex) {
        this.sex = sex;
    }

    /**
     * 获取
     * @return email
     */
    public String getEmail() {
        return email;
    }

    /**
     * 设置
     * @param email
     */
    public void setEmail(String email) {
        this.email = email;
    }

    public String toString() {
        return "User{id = " + id + ", username = " + username + ", password = " + password + ", age = " + age + ", sex = " + sex + ", email = " + email + "}";
    }
}

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

dart 复制代码

package com.baidu.mybatis.mapper;

public interface UserMapper {


}