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SpringBoot+MyBatisPlus从零搭建

MacroZheng 人气:0

前言

关注我Github的小伙伴应该了解,之前我开源了一款快速开发脚手架mall-tiny,该脚手架继承了mall项目的技术栈,拥有完整的权限管理功能。最近抽空把该项目支持了Spring Boot 2.7.0,今天再和大家聊聊这个脚手架,同时聊聊升级项目到Spring Boot 2.7.0的一些注意点,希望对大家有所帮助!

SpringBoot实战电商项目mall(50k+star)地址:https://github.com/macrozheng/mall

聊聊mall-tiny项目

可能有些小伙伴还不了解这个脚手架,我们先来聊聊它!

项目简介

mall-tiny是一款基于SpringBoot+MyBatis-Plus的快速开发脚手架,目前在Github上已有1100+Star。它拥有完整的权限管理功能,支持使用MyBatis-Plus代码生成器生成代码,可对接mall项目的Vue前端,开箱即用。

项目地址:https://github.com/macrozheng/mall-tiny

项目演示

mall-tiny项目可无缝对接mall-admin-web前端项目,秒变前后端分离脚手架,由于mall-tiny项目仅实现了基础的权限管理功能,所以前端对接后只会展示权限管理相关功能。

前端项目地址:https://github.com/macrozheng/mall-admin-web

技术选型

这次升级不仅支持了Spring Boot 2.7.0,其他依赖版本也升级到了最新版本。

技术版本说明
SpringBoot2.7.0容器+MVC框架
SpringSecurity5.7.1认证和授权框架
MyBatis3.5.9ORM框架
MyBatis-Plus3.5.1MyBatis增强工具
MyBatis-Plus Generator3.5.1数据层代码生成器
Swagger-UI3.0.0文档生产工具
Redis5.0分布式缓存
Docker18.09.0应用容器引擎
Druid1.2.9数据库连接池
Hutool5.8.0Java工具类库
JWT0.9.1JWT登录支持
Lombok1.18.24简化对象封装工具

数据库表结构

化繁为简,仅保留了权限管理功能相关的9张表,业务简单更加方便定制开发,觉得mall项目学习太复杂的小伙伴可以先学习下mall-tiny。

接口文档

由于升级了Swagger版本,原来的接口文档访问路径已经改变,最新访问路径:http://localhost:8080/swagger-ui/

使用流程

升级版本基本不影响之前的使用方式,具体使用流程可以参考最新版README文件:

https://github.com/macrozheng/mall-tiny

升级过程

接下来我们再来聊聊项目升级Spring Boot 2.7.0版本遇到的问题,这些应该是升级该版本的通用问题,你如果想升级2.7.0版本的话,了解下会很有帮助!

Swagger升级

/**
 * Swagger API文档相关配置
 * Created by macro on 2018/4/26.
 */
@Configuration
@EnableSwagger2
public class SwaggerConfig extends BaseSwaggerConfig {
    @Bean
    public static BeanPostProcessor springfoxHandlerProviderBeanPostProcessor() {
        return new BeanPostProcessor() {
            @Override
            public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
                if (bean instanceof WebMvcRequestHandlerProvider || bean instanceof WebFluxRequestHandlerProvider) {
                    customizeSpringfoxHandlerMappings(getHandlerMappings(bean));
                }
                return bean;
            }
            private <T extends RequestMappingInfoHandlerMapping> void customizeSpringfoxHandlerMappings(List<T> mappings) {
                List<T> copy = mappings.stream()
                        .filter(mapping -> mapping.getPatternParser() == null)
                        .collect(Collectors.toList());
                mappings.clear();
                mappings.addAll(copy);
            }
            @SuppressWarnings("unchecked")
            private List<RequestMappingInfoHandlerMapping> getHandlerMappings(Object bean) {
                try {
                    Field field = ReflectionUtils.findField(bean.getClass(), "handlerMappings");
                    field.setAccessible(true);
                    return (List<RequestMappingInfoHandlerMapping>) field.get(bean);
                } catch (IllegalArgumentException | IllegalAccessException e) {
                    throw new IllegalStateException(e);
                }
            }
        };
    }
}

Spring Security升级

升级Spring Boot 2.7.0版本后,原来通过继承WebSecurityConfigurerAdapter来配置的方法已经被弃用了,仅需配置SecurityFilterChainBean即可,具体参考Spring Security最新用法

/**
 * SpringSecurity 5.4.x以上新用法配置
 * 为避免循环依赖,仅用于配置HttpSecurity
 * Created by macro on 2019/11/5.
 */
@Configuration
public class SecurityConfig {
    @Autowired
    private IgnoreUrlsConfig ignoreUrlsConfig;
    @Autowired
    private RestfulAccessDeniedHandler restfulAccessDeniedHandler;
    @Autowired
    private RestAuthenticationEntryPoint restAuthenticationEntryPoint;
    @Autowired
    private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;
    @Autowired
    private DynamicSecurityService dynamicSecurityService;
    @Autowired
    private DynamicSecurityFilter dynamicSecurityFilter;
    @Bean
    SecurityFilterChain filterChain(HttpSecurity httpSecurity) throws Exception {
        ExpressionUrlAuthorizationConfigurer<HttpSecurity>.ExpressionInterceptUrlRegistry registry = httpSecurity
                .authorizeRequests();
        //不需要保护的资源路径允许访问
        for (String url : ignoreUrlsConfig.getUrls()) {
            registry.antMatchers(url).permitAll();
        }
        //允许跨域请求的OPTIONS请求
        registry.antMatchers(HttpMethod.OPTIONS)
                .permitAll();
        // 任何请求需要身份认证
        registry.and()
                .authorizeRequests()
                .anyRequest()
                .authenticated()
                // 关闭跨站请求防护及不使用session
                .and()
                .csrf()
                .disable()
                .sessionManagement()
                .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                // 自定义权限拒绝处理类
                .and()
                .exceptionHandling()
                .accessDeniedHandler(restfulAccessDeniedHandler)
                .authenticationEntryPoint(restAuthenticationEntryPoint)
                // 自定义权限拦截器JWT过滤器
                .and()
                .addFilterBefore(jwtAuthenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
        //有动态权限配置时添加动态权限校验过滤器
        if(dynamicSecurityService!=null){
            registry.and().addFilterBefore(dynamicSecurityFilter, FilterSecurityInterceptor.class);
        }
        return httpSecurity.build();
    }
}

MyBatis-Plus升级

MyBatis-Plus从之前的版本升级到了3.5.1版本,用法没有大的改变,感觉最大的区别就是代码生成器的用法改了。 在之前的用法中我们是通过new对象然后set各种属性来配置的,具体参考如下代码:

/**
 * MyBatisPlus代码生成器
 * Created by macro on 2020/8/20.
 */
public class MyBatisPlusGenerator {
    /**
     * 初始化全局配置
     */
    private static GlobalConfig initGlobalConfig(String projectPath) {
        GlobalConfig globalConfig = new GlobalConfig();
        globalConfig.setOutputDir(projectPath + "/src/main/java");
        globalConfig.setAuthor("macro");
        globalConfig.setOpen(false);
        globalConfig.setSwagger2(true);
        globalConfig.setBaseResultMap(true);
        globalConfig.setFileOverride(true);
        globalConfig.setDateType(DateType.ONLY_DATE);
        globalConfig.setEntityName("%s");
        globalConfig.setMapperName("%sMapper");
        globalConfig.setXmlName("%sMapper");
        globalConfig.setServiceName("%sService");
        globalConfig.setServiceImplName("%sServiceImpl");
        globalConfig.setControllerName("%sController");
        return globalConfig;
    }
}

而新版的MyBatis-Plus代码生成器已经改成使用建造者模式来配置了,具体可以参考MyBatisPlusGenerator类中的代码。

/**
 * MyBatisPlus代码生成器
 * Created by macro on 2020/8/20.
 */
public class MyBatisPlusGenerator {
    /**
     * 初始化全局配置
     */
    private static GlobalConfig initGlobalConfig(String projectPath) {
        return new GlobalConfig.Builder()
                .outputDir(projectPath + "/src/main/java")
                .author("macro")
                .disableOpenDir()
                .enableSwagger()
                .fileOverride()
                .dateType(DateType.ONLY_DATE)
                .build();
    }
}

解决循环依赖问题

spring:
  main:
    allow-circular-references: true
/**
 * SpringSecurity 5.4.x以上新用法配置
 * 为避免循环依赖,仅用于配置HttpSecurity
 * Created by macro on 2019/11/5.
 */
@Configuration
public class SecurityConfig {
    @Autowired
    private IgnoreUrlsConfig ignoreUrlsConfig;
    @Autowired
    private RestfulAccessDeniedHandler restfulAccessDeniedHandler;
    @Autowired
    private RestAuthenticationEntryPoint restAuthenticationEntryPoint;
    @Autowired
    private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;
    @Autowired
    private DynamicSecurityService dynamicSecurityService;
    @Autowired
    private DynamicSecurityFilter dynamicSecurityFilter;
    @Bean
    SecurityFilterChain filterChain(HttpSecurity httpSecurity) throws Exception {
        //省略若干代码...
        return httpSecurity.build();
    }
}
/**
 * SpringSecurity通用配置
 * 包括通用Bean、Security通用Bean及动态权限通用Bean
 * Created by macro on 2022/5/20.
 */
@Configuration
public class CommonSecurityConfig {
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
    @Bean
    public IgnoreUrlsConfig ignoreUrlsConfig() {
        return new IgnoreUrlsConfig();
    }
    @Bean
    public JwtTokenUtil jwtTokenUtil() {
        return new JwtTokenUtil();
    }
    @Bean
    public RestfulAccessDeniedHandler restfulAccessDeniedHandler() {
        return new RestfulAccessDeniedHandler();
    }
    @Bean
    public RestAuthenticationEntryPoint restAuthenticationEntryPoint() {
        return new RestAuthenticationEntryPoint();
    }
    @Bean
    public JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter(){
        return new JwtAuthenticationTokenFilter();
    }
    @Bean
    public DynamicAccessDecisionManager dynamicAccessDecisionManager() {
        return new DynamicAccessDecisionManager();
    }
    @Bean
    public DynamicSecurityMetadataSource dynamicSecurityMetadataSource() {
        return new DynamicSecurityMetadataSource();
    }
    @Bean
    public DynamicSecurityFilter dynamicSecurityFilter(){
        return new DynamicSecurityFilter();
    }
}
/**
 * 后台管理员管理Service实现类
 * Created by macro on 2018/4/26.
 */
@Service
public class UmsAdminServiceImpl extends ServiceImpl<UmsAdminMapper,UmsAdmin> implements UmsAdminService {
    @Autowired
    private UmsAdminCacheService adminCacheService;
}
/**
 * 后台用户缓存管理Service实现类
 * Created by macro on 2020/3/13.
 */
@Service
public class UmsAdminCacheServiceImpl implements UmsAdminCacheService {
    @Autowired
    private UmsAdminService adminService;
}
/**
 * Spring工具类
 * Created by macro on 2020/3/3.
 */
@Component
public class SpringUtil implements ApplicationContextAware {
    private static ApplicationContext applicationContext;
    // 获取applicationContext
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if (SpringUtil.applicationContext == null) {
            SpringUtil.applicationContext = applicationContext;
        }
    }
    // 通过name获取Bean
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }
    // 通过class获取Bean
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }
    // 通过name,以及Clazz返回指定的Bean
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }
}
/**
 * 后台管理员管理Service实现类
 * Created by macro on 2018/4/26.
 */
@Service
public class UmsAdminServiceImpl extends ServiceImpl<UmsAdminMapper,UmsAdmin> implements UmsAdminService {
    @Override
    public UmsAdminCacheService getCacheService() {
        return SpringUtil.getBean(UmsAdminCacheService.class);
    }
}

解决跨域问题

在使用Spring Boot 2.7.0版本时,如果不修改之前的跨域配置,通过前端访问会出现跨域问题,后端报错如下。

java.lang.IllegalArgumentException: When allowCredentials is true, allowedOrigins cannot contain the special value "*" since that cannot be set on the "Access-Control-Allow-Origin" response header. 
To allow credentials to a set of origins, list them explicitly or consider using "allowedOriginPatterns" instead.

具体的意思就是allowedOrigins已经不再支持通配符*的配置了,改为需要使用allowedOriginPatterns来设置,具体配置修改如下。

/**
 * 全局跨域配置
 * Created by macro on 2019/7/27.
 */
@Configuration
public class GlobalCorsConfig {
    /**
     * 允许跨域调用的过滤器
     */
    @Bean
    public CorsFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        //允许所有域名进行跨域调用
        config.addAllowedOriginPattern("*");
        //该用法在SpringBoot 2.7.0中已不再支持
        //config.addAllowedOrigin("*");
        //允许跨越发送cookie
        config.setAllowCredentials(true);
        //放行全部原始头信息
        config.addAllowedHeader("*");
        //允许所有请求方法跨域调用
        config.addAllowedMethod("*");
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", config);
        return new CorsFilter(source);
    }
}

总结

今天分享了下我的开源项目脚手架mall-tiny,以及它升级SpringBoot 2.7.0的过程。我们在写代码的时候,如果有些用法已经废弃,应该尽量去寻找新的用法来使用,这样才能保证我们的代码足够优雅!

项目地址 https://github.com/macrozheng/mall-tiny

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