springboot整合vue和mybaits项目实战笔记--------后台登录验证实现

本文主要是介绍springboot整合vue和mybaits项目实战笔记--------后台登录验证实现，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

• 配置application.yml

mybatis:mapper-locations: classpath:mapper/*.xmltype-aliases-package: com.example.demo.model
spring:datasource:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://localhost:3306/deliverysystemusername: rootpassword: heyanying
server:port: 9000

• bean下编写user类

public class User {private int id;private String name;private String password;private String role;private String phonenumber;private String ordernumber;public User() {}public User(String name, String password, String role, String phonenumber, String ordernumber) {this.id = id;this.name = name;this.password = password;this.role = role;this.phonenumber = phonenumber;this.ordernumber = ordernumber;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String getRole() {return role;}public void setRole(String role) {this.role = role;}public String getPhonenumber() {return phonenumber;}public void setPhonenumber(String phonenumber) {this.phonenumber = phonenumber;}public String getOrdernumber() {return ordernumber;}public void setOrdernumber(String ordernumber) {this.ordernumber = ordernumber;}@Overridepublic String toString() {return "User{" +"id=" + id +", name='" + name + '\'' +", password='" + password + '\'' +", role='" + role + '\'' +", phonenumber='" + phonenumber + '\'' +", ordernumber='" + ordernumber + '\'' +'}';}
}

• 编写controller下logincontroller

import com.alibaba.fastjson.JSON;
import com.nupt.deliverysysytem.dao.UserDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import java.util.HashMap;@RestController
public class LoginController {@AutowiredUserDao userDao;@RequestMapping("/login") //访问路径public String login(@RequestBody User user){String flag="error";User us= userDao.getUserByMassage(user.getUserName(),user.getPassword());HashMap<String,Object> res=new HashMap<>();if (us!=null){flag="ok";}res.put("flag",flag);res.put("user",user);String res_json=JSON.toJSONString("res");return res_json;}
}

• dao层uerdao

import com.nupt.deliverysysytem.bean.User;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Repository;@Repository
public interface UserDao {public User getUserByMassage(@Param("username") String username, @Param("password") String password);
}

• Mapper文件下写usermapper.xml（resulttype是返回类型）

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><!--上面是固定格式-->  
<!--从数据库中查找用户-->        
<mapper namespace="com/nupt/deliverysysytem/dao/UserDao"><select id="getUserByMassage" resultType="com/nupt/deliverysysytem/bean/User">SELECT * FROM user  WHEREusername=#{username} AND password=#{password}</select>
</mapper>

• 记得加mapperscan扫描dao

@MapperScan("com/nupt/deliverysysytem/dao")@SpringBootApplication
public class DeliverysystemApplication {public static void main(String[] args) {SpringApplication.run(DeliverysystemApplication.class, args);}}

知识点

• @RestController = @Controller + @ResponseBody组成

  @Controller 将当前修饰的类注入SpringBoot IOC容器，使得从该类所在的项目跑起来的过程中，这个类就被实例化。当然也有语义化的作用，即代表该类是充当Controller的作用
  @ResponseBody 它的作用简短截说就是指该类中所有的API接口返回的数据，甭管你对应的方法返回Map或是其他Object，它会以Json字符串的形式返回给客户端，如果返回的是String类型，则仍然是String。

@RestController
public class HelloController {@RequestMapping(value="/hello",method= RequestMethod.GET)public String sayHello(){return "hello";}
}

@Controller
@ResponseBody
public class HelloController {@RequestMapping(value="/hello",method= RequestMethod.GET)public String sayHello(){return "hello";}
}

上面两种写法等价。

• @Autowired注解

  由Spring框架定义，用于描述类中的属性后者方法（构造方法，set方法）。
  Spring框架在项目运行时假如发现由它管理的Bean对象中有使用@Autowired注解描述的属性或者方法，会按照指定规则为属性赋值（DI）。
  如果有多个实现类不加@Qualifier注解指定是哪个实现类会报错。

• @Repository
  把类标识成可用于 @Autowired 注解自动装配的 bean 的类

• JSON.toJSONString则是将对象转化为Json字符串

这篇关于springboot整合vue和mybaits项目实战笔记--------后台登录验证实现的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！

---