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SpringBoot自定义路由覆盖实现流程详解

作者:code2roc

这篇文章主要介绍了SpringBoot自定义路由覆盖实现流程,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习吧

背景

公司最近有一个项目二期需要对一些功能进行改造,涉及部分框架内置业务接口个性化定制,兼容老接口功能并且增加一部分新的数据返回,由于前端调用这些接口分布较多且较为零碎,修改测试成本较大,所以打算在框架层面提供路由覆盖功能,加快项目进度减少无技术含量的修改带来的系统风险

设计

实现

注解定义

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
public @interface CoverRoute {
    String value() default "";
}

注解扫描及管理

在系统启动时调用initRoute方法,把原路由和对应的覆盖路由映射到map键值对中

public class ConverRouteUtil {
    private static HashMap<String, String> mappingRegist = new HashMap<>();
    public static void initRoute(Class runtimeClass, List<String> extraPackageNameList) {
        List<Class<?>> scanClassList = new ArrayList<>();
        if (!runtimeClass.getPackage().getName().equals(Application.class.getPackage().getName())) {
            scanClassList.addAll(ScanUtil.getAllClassByPackageName_Annotation(runtimeClass.getPackage(), CoverRoute.class));
        }
        for (String packageName : extraPackageNameList) {
            scanClassList.addAll(ScanUtil.getAllClassByPackageName_Annotation(packageName, CoverRoute.class));
        }
        for (Class clazz : scanClassList) {
            CoverRoute coverRoute = (CoverRoute) clazz.getAnnotation(CoverRoute.class);
            if (StringUtil.isEmpty(coverRoute.value())) {
                continue;
            }
            RequestMapping requestMapping = (RequestMapping) clazz.getAnnotation(RequestMapping.class);
            String classRoute = "";
            if (requestMapping != null) {
                classRoute = requestMapping.value()[0];
            } else {
                continue;
            }
            List<Method> methodList = Arrays.asList(clazz.getDeclaredMethods());
            for (Method method : methodList) {
                PostMapping postMapping = method.getAnnotation(PostMapping.class);
                String methodRoute = "";
                if (postMapping != null) {
                    methodRoute = postMapping.value()[0];
                } else {
                    GetMapping getMapping = method.getAnnotation(GetMapping.class);
                    if (getMapping != null) {
                        methodRoute = getMapping.value()[0];
                    }
                }
                if (!StringUtil.isEmpty(classRoute) && !StringUtil.isEmpty(methodRoute)) {
                    String orginalRoute = coverRoute.value() + methodRoute;
                    String redirectRoute = classRoute + methodRoute;
                    mappingRegist.put(orginalRoute, redirectRoute);
                }
            }
        }
        if (mappingRegist.size() > 0) {
            System.out.println("扫描路由方法覆盖:" + mappingRegist.size() + "个");
        }
    }
    public static boolean checkExistCover(String orginalRoute) {
        return mappingRegist.containsKey(orginalRoute);
    }
    public static String getRedirectRoute(String orginalRoute) {
        return mappingRegist.get(orginalRoute);
    }
}

自定义RequestMappingHandlerMapping

继承RequestMappingHandlerMapping重写lookupHandlerMethod方法,在spring进行路由寻址时进行覆盖

public class CustomRequestMappingHandlerMapping extends RequestMappingHandlerMapping {
    @Override
    protected HandlerMethod lookupHandlerMethod(String lookupPath, HttpServletRequest request) throws Exception {
        if(ConverRouteUtil.checkExistCover(lookupPath)){
            String redirectRoute = ConverRouteUtil.getRedirectRoute(lookupPath);
            request.setAttribute("redirectTag","1");
            request.setAttribute("redirectRoute",redirectRoute);
            request.setAttribute("lookupPath",lookupPath);
            lookupPath = redirectRoute;
        }else{
            request.setAttribute("redirectTag","0");
        }
        return super.lookupHandlerMethod(lookupPath, request);
    }
    @Override
    protected RequestMappingInfo getMatchingMapping(RequestMappingInfo info, HttpServletRequest request) {
        String redirectTag = ConvertOp.convert2String(request.getAttribute("redirectTag"));
        if(redirectTag.equals("1")){
            String redirectRoute = ConvertOp.convert2String(request.getAttribute("redirectRoute"));
            boolean check = false;
            if( info.getPatternsCondition()!=null){
                Set<String> set =  info.getPatternsCondition().getPatterns();
                if(set.size()>0){
                    String[] array = new String[set.size()];
                    array = set.toArray(array);
                    String pattern = array[0];
                    if(pattern.equals(redirectRoute)){
                        check = true;
                    }
                }
            }
            if(check){
                return info;
            }else{
                return super.getMatchingMapping(info, request);
            }
        }else{
            return super.getMatchingMapping(info, request);
        }
    }
}

注册RequestMappingHandlerMapping

@Component
public class WebRequestMappingConfig implements WebMvcRegistrations {
    public RequestMappingHandlerMapping getRequestMappingHandlerMapping() {
        RequestMappingHandlerMapping handlerMapping = new CustomRequestMappingHandlerMapping();
        handlerMapping.setOrder(0);
        return handlerMapping;
    }
}

使用示例

在个性化接口类增加@CoverRoute注解,指定需要覆盖的路由地址,创建相同路由路径的的方法即可,访问原来的接口地址会自动转发到项目个性化接口地址

原接口

@Controller
@RequestMapping("/example/original")
public class RedirectOriginalExampleController {
    @PostMapping("/getConfig")
    @ResponseBody
    @AnonymousAccess
    public Object getConfig(@RequestBody Map<String, Object> params) {
        Result result = Result.okResult();
        result.add("tag","original");
        return result;
    }
}

新接口

@Controller
@RequestMapping("/example/redirect")
@CoverRoute("/example/original")
public class RedirectExampleController {
    @PostMapping("/getConfig")
    @ResponseBody
    public Object getConfig(@RequestBody Map<String, Object> params) {
        Result result = Result.okResult();
        String param1 = ConvertOp.convert2String(params.get("param1"));
        result.add("tag","redirect");
        result.add("param1",param1);
        return result;
    }
}

到此这篇关于SpringBoot自定义路由覆盖实现流程详解的文章就介绍到这了,更多相关SpringBoot自定义路由覆盖内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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