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
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;@Servicepublic 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@Transactionalpublic 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;@Configurationpublic class WebConfig extends WebMvcConfigurationSupport{ @Autowired UserArgumentResolver userArgumentResolver; @Override protected void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) { argumentResolvers.add(userArgumentResolver); } public void addResourceHandlers(ResourceHandlerRegistry registry){ registry.addResourceHandler("/**").addResourceLocations(ResourceUtils.CLASSPATH_URL_PREFIX+"/static/"); super.addResourceHandlers(registry); }}
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本文标题: Spring自定义参数解析器代码实例
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