前端

本篇文章讲解springboot + mybatis plus来进行实现登录功能

1、创建实体类Employee和employee表进行映射,可以直接导入资料中提供的实体类

1.1、字段名称对应上，有下划线的使用驼峰对应，因为在配置文件中进行了配置

1.2、employee 文件

package com.example.ruiji_demo.entity;import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.TableField;
import lombok.Data;
import org.springframework.util.ReflectionUtils;import java.io.Serializable;
import java.time.LocalDate;
import java.time.LocalDateTime;/*** @author jitwxs* @date 2024年03月11日 22:59*/
@Data
public class Employee implements Serializable {private static final long serialVersionUID = 1L;private Long id;private String username;private String name;private String password;private String phone;private String sex;private String idNumber;private Integer status;private LocalDateTime createTime;private LocalDateTime updateTime;@TableField(fill = FieldFill.INSERT)private Long createUser;@TableField(fill = FieldFill.INSERT_UPDATE)private Long updateUser;
}

2、创建Controller、Service、Mapper

2.1、Mapper文件

package com.example.ruiji_demo.mapper;import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.ruiji_demo.entity.Employee;
import org.apache.ibatis.annotations.Mapper;@Mapper
public interface EmployeeMapper extends BaseMapper<Employee> {
}

2.2、定义实现接口

employeeServiece 接口文件

package com.example.ruiji_demo.service;import com.baomidou.mybatisplus.extension.service.IService;
import com.example.ruiji_demo.entity.Employee;public interface EmployeeService extends IService<Employee> {
}

impl文件

package com.example.ruiji_demo.service.impl;import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.ruiji_demo.entity.Employee;
import com.example.ruiji_demo.mapper.EmployeeMapper;
import com.example.ruiji_demo.service.EmployeeService;
import org.springframework.stereotype.Service;/*** @author jitwxs* @date 2024年03月11日 23:37*/
@Service
public class EmployeeServiceImpl extends ServiceImpl<EmployeeMapper, Employee> implements EmployeeService {
}

2.3、创建通用方法，封装服务器端响应数据

package com.example.ruiji_demo.common;import lombok.Data;import java.util.HashMap;
import java.util.Map;/*** @author jitwxs* @date 2024年03月11日 23:46*/@Data
public class R<T> {private Integer code; //编码：1成功 0和其他数字失败private String msg; //错误信息private T data; // 数据private Map map = new HashMap(); //动态数据public static<T>R<T>success(T object){R<T> r = new R<T>();r.data = object;r.code = 1;return r;}public static<T>R<T>error(String msg){R r = new R();r.code = 0;return r;}public R<T>add(String key,Object value){this.map.put(key, value);return this;}}

2.3、Controller文件

写方法文件

package com.example.ruiji_demo.controller;import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.conditions.query.LambdaQueryChainWrapper;
import com.example.ruiji_demo.common.R;
import com.example.ruiji_demo.entity.Employee;
import com.example.ruiji_demo.service.EmployeeService;
import jakarta.servlet.http.HttpServletRequest;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;/*** @author jitwxs* @date 2024年03月11日 23:40*/
@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {@Autowiredprivate EmployeeService employeeService;/*** 员工登录* @param request* @param employee* @return*/@PostMapping("/login")public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee){
//        1、将页面提交的密码password进行md5加密String password = employee.getPassword();password = DigestUtils.md5DigestAsHex(password.getBytes());//        2、根据页面提交的用户名username查询数据库LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();queryWrapper.eq(Employee::getUsername,employee.getUsername());Employee emp = employeeService.getOne(queryWrapper);//        3、如果没有查询到则返回登录失败if(emp == null){return R.error("登录失败");}//        4、密码比对错误，如果不一致则返回登录失败结果if(!emp.getPassword().equals(password)){return R.error("登录失败");}//        5、查看员工状态，如果为已禁用状态，则返回员工已禁用结果if(emp.getStatus() == 0){return R.error("账号已禁用");}//        6、登录陈工，将员工id存入到session并返回登录结果request.getSession().setAttribute("employee",emp.getId());return R.success(emp);}
}

3、测试登录接口