上一节Springboot管理系统数据权限过滤——ruoyi实现方案对数据权限实现方案有了认识,本文将进一步优化权限过滤方案,实现对业务代码零入侵。
回顾上一章中权限方案:
为了实现对业务零入侵,实则是在SQL编写的时候,希望通过框架实现权限脚本的自动拼接,而非人为添加。
本文权限控制需要达到的效果:
pom.xml文件
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.3.RELEASE</version>
<relativePath/>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 方便等会写单元测试 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- 实现对数据库连接池的自动化配置 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency> <!-- 本示例,我们使用 MySQL -->
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.48</version>
</dependency>
<!-- 实现对 MyBatis 的自动化配置 -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.5.3.2</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!-- 引入 Swagger 依赖 -->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.9.2</version>
</dependency>
<!-- 引入 Swagger UI 依赖,以实现 API 接口的 UI 界面 -->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.9.2</version>
</dependency>
</dependencies>
application.yaml
spring:
# datasource 数据源配置内容
datasource:
url: jdbc:mysql://127.0.0.1:3306/test_users?useSSL=false&useUnicode=true&characterEncoding=UTF-8
driver-class-name: com.mysql.jdbc.Driver
username: root
password: 123456
# mybatis-plus 配置内容
mybatis-plus:
configuration:
map-underscore-to-camel-case: true # 虽然默认为 true ,但是还是显示去指定下。
global-config:
db-config:
id-type: auto # ID 主键自增
logic-delete-value: 1 # 逻辑已删除值(默认为 1)
logic-not-delete-value: 0 # 逻辑未删除值(默认为 0)
mapper-locations: classpath*:mapper/*.xml
type-aliases-package: com.luo.chengrui.labs.lab02.dataobject # 配置数据库实体包路径
# logging
logging:
level:
# dao 开启 debug 模式 mybatis 输入 sql
com:
luo:
chengrui:
labs: debug
UserDao.java
package com.luo.chengrui.labs.lab02.dataobject;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;
import lombok.experimental.Accessors;
import java.util.Date;
/**
* @author
* @version 1.0.0
* @description
* @createTime 2023/07/20
*/
@Data
@Accessors(chain = true)
@TableName(value = "users")
public class UserDO {
/**
* 用户编号
*/
private Long id;
/**
* 账号
*/
private String username;
/**
* 密码(明文)
* <p>
* ps:生产环境下,千万不要明文噢
*/
private String password;
/**
* 创建时间
*/
private Date createTime;
}
UserMapper.java
package com.luo.chengrui.labs.lab02.mapper;
import com.luo.chengrui.labs.lab02.dataobject.UserDO;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import java.util.List;
@Mapper
public interface UserMapper {
UserDO selectById(@Param("id") Integer id);
List<UserDO> selectList();
}
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.luo.chengrui.labs.lab02.mapper.UserMapper">
<sql id="FIELDS">
id
, username
</sql>
<select id="selectById" parameterType="Integer" resultType="UserDO">
SELECT
<include refid="FIELDS"/>
FROM users
WHERE id = #{id}
</select>
<select id="selectList" resultType="UserDo">
SELECT
<include refid="FIELDS"/>
FROM users
</select>
</mapper>
UserService.java
package com.luo.chengrui.labs.lab02.service;
import com.luo.chengrui.labs.lab02.annotation.DataScope;
import com.luo.chengrui.labs.lab02.dataobject.UserDO;
import com.luo.chengrui.labs.lab02.mapper.UserMapper;
import org.springframework.aop.framework.AopContext;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* @author
* @version 1.0.0
* @description
* @createTime 2023/07/21
*/
@Service
public class UserService {
@Autowired
private UserMapper userMapper;
private UserService self() {
return (UserService) AopContext.currentProxy();
}
/**
* 方法未使用 @Transactional 注解,不会开启事务。
* 对于 OrderMapper 和 UserMapper 的查询操作,分别使用其接口上的 @DS 注解,找到对应的数据源,执行操作。
* 这样一看,在未开启事务的情况下,我们已经能够自由的使用多数据源落。
*/
public void method() {
// 查询订单
UserDO user = userMapper.selectById(1);
System.out.println(user);
}
@DataScope
public void method01() {
// 查询订单
UserDO user = userMapper.selectById(1);
System.out.println(user);
}
@DataScope
public List<UserDO> selectList() {
return userMapper.selectList();
}
}
UserController.java
package com.luo.chengrui.labs.lab02.controller;
import com.luo.chengrui.labs.lab02.dataobject.UserDO;
import com.luo.chengrui.labs.lab02.service.UserService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
/**
* @author
* @version 1.0.0
* @description
* @createTime 2023/07/17
*/
@RestController
@RequestMapping("/users")
@Api(tags = "用户 API 接口")
public class UserController {
@Autowired
UserService userService;
@GetMapping("/list")
@ApiOperation(value = "查询用户列表", notes = "目前仅仅是作为测试,所以返回用户全列表")
public List<UserDO> list() {
// 查询列表
List<UserDO> result = userService.selectList();
// 返回列表
return result;
}
}
SwaggerConfiguration.java
package com.luo.chengrui.labs.lab02.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;
/**
* 访问地址:/swagger-ui.html
* @author
* @version 1.0.0
* @description
* @createTime 2023/07/17
*/
@Configuration
@EnableSwagger2
public class SwaggerConfiguration {
@Bean
public Docket createRestApi() {
// 创建 Docket 对象
return new Docket(DocumentationType.SWAGGER_2) // 文档类型,使用 Swagger2
.apiInfo(this.apiInfo()) // 设置 API 信息
// 扫描 Controller 包路径,获得 API 接口
.select()
.apis(RequestHandlerSelectors.basePackage("com.luo.chengrui.labs.lab02.controller"))
.paths(PathSelectors.any())
// 构建出 Docket 对象
.build();
}
/**
* 创建 API 信息
*/
private ApiInfo apiInfo() {
return new ApiInfoBuilder()
.title("测试接口文档示例")
.description("我是一段描述")
.version("1.0.0") // 版本号
.contact(new Contact("chengrui", "http://www.chengrui.cn", "chengrui@gmail.com")) // 联系人
.build();
}
}
Lab0201Application.java
package com.luo.chengrui.labs.lab02;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* @author
* @version 1.0.0
* @description
* @createTime 2023/07/21
*/
@SpringBootApplication
@MapperScan(basePackages = "com.luo.chengrui.labs.lab02.mapper")
public class Lab0201Application {
public static void main(String[] args) {
SpringApplication.run(Lab0201Application.class, args);
}
}
到此完成框架搭建,访问:http://localhost:8080/swagger-ui.html,可看到以下页面即为成功。
创建 MybatisDatabaseInterceptor .java 类,类中大部分代码是对sql的解析,对表名的解析,对where语句的解析,真正需要关注的逻辑只是少部分,本部分代码里暂未添加对权限的控制,在下一文章中添加。
该类继承JsqlParserSupport ,同时实现InnerInterceptor接口
package com.luo.chengrui.labs.lab02.datapermission;
import com.baomidou.mybatisplus.core.plugins.InterceptorIgnoreHelper;
import com.baomidou.mybatisplus.core.toolkit.PluginUtils;
import com.baomidou.mybatisplus.extension.parser.JsqlParserSupport;
import com.baomidou.mybatisplus.extension.plugins.inner.InnerInterceptor;
import lombok.RequiredArgsConstructor;
import net.sf.jsqlparser.statement.delete.Delete;
import net.sf.jsqlparser.statement.select.PlainSelect;
import net.sf.jsqlparser.statement.select.Select;
import net.sf.jsqlparser.statement.update.Update;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.executor.statement.StatementHandler;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.SqlCommandType;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.sql.Connection;
/**
* SQL拦截器,
* 主要的 SQL 重写方法,
* 主要是在执行SQL前拦截器,在执行之前可重写SQL
*/
@RequiredArgsConstructor
public class MybatisDatabaseInterceptor extends JsqlParserSupport implements InnerInterceptor {
Logger logger = LoggerFactory.getLogger(MybatisDatabaseInterceptor.class);
@Override // SELECT 场景
public void beforeQuery(Executor executor, MappedStatement ms, Object parameter, RowBounds rowBounds, ResultHandler resultHandler, BoundSql boundSql) {
logger.debug("MybatisDatabaseInterceptor .... beforeQuery");
if (!InterceptorIgnoreHelper.willIgnoreDataPermission(ms.getId())) {
PluginUtils.MPBoundSql mpBs = PluginUtils.mpBoundSql(boundSql);
//简单实现一个sql改造例子
mpBs.sql(String.format(" select * from (%s) t limit 0,1", mpBs.sql()));
}
}
@Override // 只处理 UPDATE / DELETE 场景,不处理 INSERT 场景(因为 INSERT 不需要数据权限)
public void beforePrepare(StatementHandler sh, Connection connection, Integer transactionTimeout) {
logger.debug("MybatisDatabaseInterceptor .... beforePrepare");
PluginUtils.MPStatementHandler mpSh = PluginUtils.mpStatementHandler(sh);
MappedStatement ms = mpSh.mappedStatement();
SqlCommandType sct = ms.getSqlCommandType();
if (sct == SqlCommandType.UPDATE || sct == SqlCommandType.DELETE) {
if (InterceptorIgnoreHelper.willIgnoreDataPermission(ms.getId())) {
return;
}
PluginUtils.MPBoundSql mpBs = mpSh.mPBoundSql();
mpBs.sql(this.parserMulti(mpBs.sql(), ms.getId()));
}
}
@Override
protected void processSelect(Select select, int index, String sql, Object obj) {
logger.debug("MybatisDatabaseInterceptor .... processSelect");
// mpBs.sql(String.format(" select * from (%s) t limit 0,1", sql);
}
/**
* update 语句处理
*/
@Override
protected void processUpdate(Update update, int index, String sql, Object obj) {
logger.debug("MybatisDatabaseInterceptor .... processUpdate");
}
/**
* delete 语句处理
*/
@Override
protected void processDelete(Delete delete, int index, String sql, Object obj) {
logger.debug("MybatisDatabaseInterceptor .... processDelete");
}
}
将拦截器注入Mybatis拦截器队列
@Configuration
public class DataPermissionConfiguration {
@Bean
public MybatisPlusInterceptor mybatisPlusInterceptor(List<DataPermissionRule> dataPermissionRule) {
MybatisPlusInterceptor mybatisPlusInterceptor = new MybatisPlusInterceptor();
MybatisDatabaseInterceptor mybatisDatabaseInterceptor = new MybatisDatabaseInterceptor();
List<InnerInterceptor> inners = new ArrayList<>(mybatisPlusInterceptor.getInterceptors());
inners.add(0, mybatisDatabaseInterceptor);
mybatisPlusInterceptor.setInterceptors(inners);
return mybatisPlusInterceptor;
}
}
完成上面配置后,每执行一个SQL都会被我们定义的拦截器拦截了,执行sql查询,可以看到已经过了拦截器。
至此我们完成了对SQL的拦截,并实现了最简单的sql改造。由于篇幅太长,对于sql的改造放到一下章:
总结,本章通过继承JsqlParserSupport 实现 InnerInterceptor 自定义SQL拦截器达到修改sql的目的。