Spring自定义参数解析器代码实例
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
importjavax.servlet.http.Cookie;
importjavax.servlet.http.HttpServletRequest;
importorg.springframework.beans.factory.annotation.Autowired;
importorg.springframework.core.MethodParameter;
importorg.springframework.stereotype.Service;
importorg.springframework.web.bind.support.WebDataBinderFactory;
importorg.springframework.web.context.request.NativeWebRequest;
importorg.springframework.web.method.support.HandlerMethodArgumentResolver;
importorg.springframework.web.method.support.ModelAndViewContainer;
importcn.xingaohbd.seckil.model.User;
importcn.xingaohbd.seckil.service.UserService;
@Service
publicclassUserArgumentResolverimplementsHandlerMethodArgumentResolver{
@Autowired
publicUserServiceuserService;
publicStringgetParameterCokies(HttpServletRequestrequest,StringtokenName){
Cookie[]cookies=request.getCookies();
for(Cookieck:cookies){
if(ck.getName().equals(tokenName)){
returnck.getValue();
}
}
returnnull;
}
@Override
publicbooleansupportsParameter(MethodParametermethodParameter){
Classp_class=methodParameter.getParameterType();
returnp_class==User.class;
}
@Override
publicObjectresolveArgument(MethodParameterparameter,ModelAndViewContainermavContainer,
NativeWebRequestnativeWebRequest,WebDataBinderFactorybinderFactory)throwsException{
HttpServletRequestrequest=nativeWebRequest.getNativeRequest(HttpServletRequest.class);
StringrequestParameter_token=request.getParameter("token");
Stringcokies_token=getParameterCokies(request,"token");
if(requestParameter_token==null&&cokies_token==null){
returnnull;
}
returnuserService.getUserFromRedisByToken(requestParameter_token!=null?requestParameter_token:cokies_token);
}
}
UserService
@Service
@Transactional
publicclassUserServiceImplimplementsUserService{
@Autowired
privateUserRedisuserRedis;
@Override
publicObjectgetUserFromRedisByToken(Stringtoken){
returnuserRedis.get(token);
}
}
在WebConfig中注册自定义参数解析器UserArgumentResolver
importjava.util.List;
importorg.springframework.beans.factory.annotation.Autowired;
importorg.springframework.context.annotation.Configuration;
importorg.springframework.util.ResourceUtils;
importorg.springframework.web.method.support.HandlerMethodArgumentResolver;
importorg.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
importorg.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
@Configuration
publicclassWebConfigextendsWebMvcConfigurationSupport{
@Autowired
UserArgumentResolveruserArgumentResolver;
@Override
protectedvoidaddArgumentResolvers(ListargumentResolvers){
argumentResolvers.add(userArgumentResolver);
}
publicvoidaddResourceHandlers(ResourceHandlerRegistryregistry){
registry.addResourceHandler("/**").addResourceLocations(ResourceUtils.CLASSPATH_URL_PREFIX+"/static/");
super.addResourceHandlers(registry);
}
}
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