SpringBoot整合Mybatis框架

SpringBoot整合Mybatis框架

我们接着来整合一下SpringSecurity依赖，继续感受SpringBoot带来的光速开发体验，只需要导入SpringSecurity的Starter依赖即可：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.2.0</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>

导入依赖后，直接启动会报错，是因为有必要的配置我们没有去编写，我们需要指定数据源的相关信息：

spring.datasource.url=jdbc:mysql://localhost:3306/db10?useUnicode=true&characterEncoding=UTF-8&userSSL=false&serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

这是Mybatis自动扫描输出的语句，导入依赖后，我们不需要再去设置Mybatis的相关Bean了，也不需要添加任何@MapperSacn注解，因为starter已经帮助我们做了，它会自动扫描项目中添加了@Mapper注解的接口，直接将其注册为Bean，不需要进行任何配置。
编写mapper接口

import com.example.entry.UserData;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

@Mapper
public interface MainMapper {
    @Select("select * from users where username = #{username} limit 1")
    UserData findUserByName(String username);
}

当然，如果你觉得每个接口都去加一个@Mapper比较麻烦的话也可以用回之前的方式，直接@MapperScan使用包扫描。

添加Mapper之后，使用方法和SSM阶段是一样的，我们可以将其与SpringSecurity结合使用：
编写service类

import com.example.entry.UserData;
import com.example.mapper.MainMapper;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

@Service
public class UserAuthService implements UserDetailsService {

    @Resource
    MainMapper mapper;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        UserData data = mapper.findUserByName(username);
        if(data == null) throw new UsernameNotFoundException("用户 "+username+" 登录失败，用户名不存在！");
        System.out.println(data.toString());
        return User
                .withUsername(data.getUsername())
                .password(data.getPassword())
                .roles(data.getRole())
                .build();
    }
}

最后配置一下自定义验证即可，注意这样之前配置文件里面配置的用户就失效了：
编写config类

import com.example.service.UserAuthService;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

import javax.annotation.Resource;

@Configuration
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {
    @Resource
    UserAuthService service;


    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .authorizeRequests()
                .antMatchers("/index").permitAll()
                .anyRequest().hasAnyRole("user","admin")
                .and()
                .formLogin();
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth
                .userDetailsService(service)
                .passwordEncoder(new BCryptPasswordEncoder());
    }

}

实际上，SpringBoot会自动为Mybatis配置数据源，默认使用的就是HikariCP数据源。
entry实体类

import lombok.Data;

@Data
public class UserData {
    int id;
    String username;
    String password;
    String role;
}

此时，controller类显得很多余

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;


@Controller
public class MainController {

    //    requesMapping测试地址：index，
    @RequestMapping("/index")
    @ResponseBody
    public String index(){
        return "你好，欢迎访问";//这里的name是用来测试数据注入是否成功
    }



}

数据库

/*
Navicat MySQL Data Transfer

Source Server         : fiveGods
Source Server Version : 80016
Source Host           : localhost:3306
Source Database       : db10

Target Server Type    : MYSQL
Target Server Version : 80016
File Encoding         : 65001

Date: 2022-03-14 21:02:58
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for users
-- ----------------------------
DROP TABLE IF EXISTS `users`;
CREATE TABLE `users` (
  `id` int(11) DEFAULT NULL,
  `username` varchar(255) DEFAULT NULL,
  `password` varchar(255) DEFAULT NULL,
  `role` varchar(255) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of users
-- ----------------------------
INSERT INTO `users` VALUES (null, 'test', '$2a$10$9t6WBfMUYkjRDzoISpo6C.VYsJZzGrEk9dyx3QyGUzhDDSqBrNStC', 'admin');
INSERT INTO `users` VALUES (null, 'and', 'and', 'user');