这篇文章主要介绍了Spring自定义参数解析器代码实例,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,需要的朋友可以参考下
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结合redis编写User自定义参数解析器UserArgumentResolver
import javax.servlet.http.Cookie; import javax.servlet.http.HttpServletRequest; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.core.MethodParameter; import org.springframework.stereotype.Service; import org.springframework.web.bind.support.WebDataBinderFactory; import org.springframework.web.context.request.NativeWebRequest; import org.springframework.web.method.support.HandlerMethodArgumentResolver; import org.springframework.web.method.support.ModelAndViewContainer; import cn.xingaohbd.seckil.model.User; import cn.xingaohbd.seckil.service.UserService; @Service public class UserArgumentResolver implements HandlerMethodArgumentResolver { @Autowired public UserService userService; public String getParameterCokies(HttpServletRequest request,String tokenName){ Cookie[] cookies = request.getCookies(); for (Cookie ck : cookies) { if(ck.getName().equals(tokenName)){ return ck.getValue(); } } return null; } @Override public boolean supportsParameter(MethodParameter methodParameter) { Class<?> p_class = methodParameter.getParameterType(); return p_class == User.class; } @Override public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest nativeWebRequest, WebDataBinderFactory binderFactory) throws Exception { HttpServletRequest request = nativeWebRequest.getNativeRequest(HttpServletRequest.class); String requestParameter_token = request.getParameter("token"); String cokies_token = getParameterCokies(request, "token"); if(requestParameter_token == null && cokies_token == null){ return null; } return userService.getUserFromRedisByToken(requestParameter_token != null ? requestParameter_token : cokies_token); } }
UserService
@Service @Transactional public class UserServiceImpl implements UserService { @Autowired private UserRedis userRedis; @Override public Object getUserFromRedisByToken(String token) { return userRedis.get(token); } }
在WebConfig中注册自定义参数解析器UserArgumentResolver
import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Configuration; import org.springframework.util.ResourceUtils; import org.springframework.web.method.support.HandlerMethodArgumentResolver; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport; @Configuration public class WebConfig extends WebMvcConfigurationSupport{ @Autowired UserArgumentResolver userArgumentResolver; @Override protected void addArgumentResolvers(ListargumentResolvers) { argumentResolvers.add(userArgumentResolver); } public void addResourceHandlers(ResourceHandlerRegistry registry){ registry.addResourceHandler("/**").addResourceLocations(ResourceUtils.CLASSPATH_URL_PREFIX+"/static/"); super.addResourceHandlers(registry); } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持创新互联。