springboot-shiro:整合mybatis

承接:springboot-shiro:用户认证

1 导入整合mybatis的相关依赖

pom.xml

<!-- 引入myBatis,这是MyBatis官方提供的适配Spring Boot的,而不是SpringBoot自己的-->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.2.2</version>
</dependency>
<!--mysql-->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.47</version>
</dependency>
<!--log4j-->
<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>
<!--Druid -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.2.8</version>
</dependency>

2 编写配置文件application.yml的连接配置

src/main/resources/application.yaml

spring:
  datasource:
    username: root
    password: 123456
    #假如时区报错了,就增加一个时区配置就OK了 serverTimezone=UTC
    url: jdbc:mysql://localhost:3306/mybatis?useSSL=false&useUnicode=true&characterEncoding=utf-8
    driver-class-name: com.mysql.jdbc.Driver
    #切换数据源
    type: com.alibaba.druid.pool.DruidDataSource
    #Spring Boot 默认是不注入这些属性值的，需要自己绑定
    #druid 数据源专有配置
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
    #配置监控统计拦截的filters，stat:监控统计、log4j：日志记录、wall：防御sql注入
    #如果允许时报错 java.lang.ClassNotFoundException:org.apache.log4j.Priority
    #则导入 log4j 依赖即可，Maven 地址：https://mvnrepository.com/artifact/log4j/log4j
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

3 创建目录结构

创建三个包和一个文件夹:mapper包,pojo包,service包,resources目录下新建一个mapper文件夹

4 在application.properties中编写mybatis的配置 

src/main/resources/application.properties

mybatis.type-aliases-package=com.lv.pojo
mybatis.mapper-locations=classpath:mapper/*.xml

5 编写实体类

引入lombok依赖

pom.xml

<!--lombok-->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.22</version>
</dependency>

在pojo包下编写一个User类

src/main/java/com/lv/pojo/User.java

package com.lv.pojo;
 
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
 
@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
    private int id;
    private String name;
    private String pwd;
}

6 在mapper包下编写一个UserMapper接口

src/main/java/com/lv/mapper/UserMapper.java

package com.lv.mapper;
 
import com.lv.pojo.User;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
 
@Repository
@Mapper
public interface UserMapper {
    public User queryUserByName(String name);
}

7 在mapper文件夹下编写一个UserMapper.xml文件

src/main/resources/mapper/UserMapper.xml

<?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">
<mapper namespace="com.lv.mapper.UserMapper">
    <select id="queryUserByName" parameterType="String" resultType="User">
        select * from user where name = #{name}
    </select>
</mapper>

8 在service包下编写UserService接口

src/main/java/com/lv/service/UserService.java

package com.lv.service;
 
import com.lv.pojo.User;
 
public interface UserService {
    public User queryUserByName(String name);
}

9 在service包下编写UserService接口对应的实现类

src/main/java/com/lv/service/UserServiceImpl.java

package com.lv.service;
 
import com.lv.mapper.UserMapper;
import com.lv.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 
@Service
public class UserServiceImpl implements UserService {
 
    @Autowired
    UserMapper userMapper;
 
    @Override
    public User queryUserByName(String name) {
        return userMapper.queryUserByName(name);
    }
}

10 修改UserRealm,连接到数据库进行真实的操作

src/main/java/com/lv/config/UserRealm.java

package com.lv.config;
 
import com.lv.pojo.User;
import com.lv.service.UserService;
import org.apache.shiro.authc.*;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.springframework.beans.factory.annotation.Autowired;
 
//自定义的UserRealm  extends AuthorizingRealm
public class UserRealm extends AuthorizingRealm {
 
    @Autowired
    UserService userService;
 
    //授权
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        System.out.println("执行了=>授权doGetAuthorizationInfo");
        return null;
    }
    //认证
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        System.out.println("执行了=>认证doGetAuthorizationInfo");
        UsernamePasswordToken userToken = (UsernamePasswordToken) token;
        //连接真实的数据库
        User user = userService.queryUserByName(userToken.getUsername());
        if (user == null){ //没有这个人
            return null; //UnknownAccountException
        }
        //密码认证,交给shiro做(可以加密: MD5,MD5盐值加密)
        return new SimpleAuthenticationInfo("",user.getPwd(),"");
    }
}

11 启动程序测试

访问登录页面,输入错误的账号,和密码

登录失败,提示用户名错误,接下来输入正确的账号,和错误的密码

登录失败,提示密码错误,接下来输入数据库中正确的用户名和密码

登录成功,再输入数据库中另一组正确的用户名和密码

依旧登录成功,实现了整合mybatis连接数据库