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這篇文章主要介紹了Spring自定義參數解析器代碼實例,文中通過示例代碼介紹的非常詳細，對大家的學習或者工作具有一定的參考學習價值,需要的朋友可以參考下
結合redis編寫User自定義參數解析器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中注冊自定義參數解析器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(List<HandlerMethodArgumentResolver> argumentResolvers) {
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內容，希望對大家的學習有所幫助，也希望大家多多支持億速云。
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