本篇内容介绍了“Java后端登录功能怎么实现”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!一. 登录需求分析页面原型 登录页面展示:项目路径
本篇内容介绍了“Java后端登录功能怎么实现”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!
页面原型
登录页面展示:项目路径(\resources\backend\page\login\login.html)
员工点击登录按钮进行后管平台的登录操作,登录正确以外方式不可登录。
登录处理逻辑
package com.itheima.reggie.common;import lombok.Data;import java.util.HashMap;import java.util.Map;@Datapublic class R<T> { private Integer code; private String msg; private T data; private Map map = new HashMap(); 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.msg = msg; r.code = 0; return r; } public R<T> add(String key, Object value) { this.map.put(key, value); return this; }}
说明 | 值 |
请求URL | /employee/login |
请求数据 | { "username": "admin", "passWord": "123456" } |
返回数据 | { "code": 0, "msg": "登录成功", "data": null, "map": {} } |
entity: 创建实体类
创建Employee.java(员工对象)
package com.itheima.reggie.entity;import com.baomidou.mybatisplus.annotation.FieldFill;import com.baomidou.mybatisplus.annotation.TableField;import lombok.Data;import java.io.Serializable;import java.time.LocalDateTime;@Datapublic 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;}
mapper数据库交互层
package com.itheima.reggie.mapper;import com.baomidou.mybatisplus.core.mapper.BaseMapper;import com.itheima.reggie.entity.Employee;import org.apache.ibatis.annotations.Mapper;@Mapperpublic interface EmployeeMapper extends BaseMapper<Employee> {}
service业务层接口
package com.itheima.reggie.service;import com.baomidou.mybatisplus.extension.service.IService;import com.itheima.reggie.entity.Employee;import org.springframework.stereotype.Service;public interface EmployeeService extends IService<Employee> {}
业务层实现类
package com.itheima.reggie.service.impl;import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;import com.itheima.reggie.entity.Employee;import com.itheima.reggie.mapper.EmployeeMapper;import com.itheima.reggie.service.EmployeeService;import org.springframework.stereotype.Service;@Servicepublic class EmployeeServiceImpl extends ServiceImpl<EmployeeMapper, Employee> implements EmployeeService {}
controller控制层
package com.itheima.reggie.controller;import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;import com.itheima.reggie.common.CommonsConst;import com.itheima.reggie.common.R;import com.itheima.reggie.entity.Employee;import com.itheima.reggie.service.EmployeeService;import lombok.extern.slf4j.Slf4j;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;import javax.annotation.Resource;import javax.servlet.Http.httpservletRequest;@Slf4j@RestController@RequestMapping("/employee")public class EmployeeController { @Resource private EmployeeService employeeService = null; @PostMapping("/login") public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) { // 将页面提交的密码进行MD5加密 String password = employee.getPassword(); password = DigestUtils.md5DigestAsHex(password.getBytes()); // 根据用户名查数据库 LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<Employee>(); queryWrapper.eq(Employee::getUsername, employee.getUsername()); Employee emp = employeeService.getOne(queryWrapper); // 查不到返回登录失败结果 if(emp == null){ return R.error(CommonsConst.LOGIN_FaiL); } // 比对密码 if(!emp.getPassword().equals(password)){ return R.error(CommonsConst.LOGIN_FAIL); } // 查看员工状态 if(emp.getStatus() == CommonsConst.EMPLOYEE_STATUS_NO){ return R.error(CommonsConst.LOGIN_ACCOUNT_STOP); } // 登录成功将员工的ID放入session中 request.getSession().setAttribute("employeeId",emp.getId()); return R.success(emp); }}
Debug测试时主要测试以下几点:
用户名与密码的校验
用户状态禁用情况下
数据是否正确返回
常量类:
package com.itheima.reggie.common;public class CommonsConst { // 登录失败 public static final String LOGIN_FAIL = "登录失败"; // 账号禁用 public static final String LOGIN_ACCOUNT_STOP = "账号禁止使用"; // 员工账号禁用状态 0:禁用 public static final Integer EMPLOYEE_STATUS_NO = 0; // 员工账号正常状态 1:正常使用 public static final Integer EMPLOYEE_STATUS_YES = 1;}
“Java后端登录功能怎么实现”的内容就介绍到这里了,感谢大家的阅读。如果想了解更多行业相关的知识可以关注编程网网站,小编将为大家输出更多高质量的实用文章!
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