Spring自定义参数解析器代码实例

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

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();

http:// }

}

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 : cokimbxJqKTHes_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(List argumentResolvers) {

argumentResolvers.add(userArgumentResolver);

}

public void addResourceHandlers(ResourceHandlerRegistry registry){

registry.addResourceHandler("/**").addResourceLocations(ResourceUtils.CLASSPATH_UmbxJqKTHRL_PREFIX+"/static/");

super.addResourceHandlers(registry);

}

}

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