Spring动态路由注册：如何避免硬编码控制器参数类型？

霞舞 2024-12-02 00:00:00 次阅读

spring 动态注册控制器路由

问题：

如何动态注册 spring 控制器路由，而不必写死参数类型？

答案：

为了动态化参数类型，可以使用 java 反射来获取方法的参

数类型。以下是修改后的示例代码：

package dry.example.service.impl;

import dry.example.route.CustomInvocationHandler;
import dry.example.route.RouteAdmin;
import dry.example.service.RouteService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.mvc.method.RequestMappingInfo;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;

import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

@Service
public class RouteServiceImpl implements RouteService {

    @Autowired
    private RequestMappingHandlerMapping requestMappingHandlerMapping;

    @Override
    public void run(Object handler) {
        try {
            RequestMappingInfo requestMappingInfo = RequestMappingInfo.paths("testing").methods(RequestMethod.GET).build();
            Method method = handler.getClass().getMethod("h01", getParameterType(handler, "h01"));
            requestMappingHandlerMapping.registerMapping(requestMappingInfo, handler, method);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private Class getParameterType(Object handler, String methodName) throws NoSuchMethodException {
        Method method = handler.getClass().getMethod(methodName);
        return method.getParameterTypes()[0];
    }

}

修改部分：