这篇文章主要介绍了Springboot引入拦截器并放行swagger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
Springboot引入拦截器
自定义的拦截器类 Interceptor
package cn.zytao.taosir.auth.config;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
public class AuthInterceptor implements HandlerInterceptor{
/**
* 请求处理之后
*/
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
// TODO Auto-generated method stub
HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
}
/**
* 请求处理之后调用
*/
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
// TODO Auto-generated method stub
HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
}
/**
* 请求处理之前
*/
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
return HandlerInterceptor.super.preHandle(request, response, handler);
}
}
将拦截器添加到springmvc配置中，并放行swagger的相关资源
package cn.zytao.taosir.auth.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
@Configuration
public class SpringMVCConfig extends WebMvcConfigurationSupport{
@Bean
public AuthInterceptor getAuthInterceptor() {
return new AuthInterceptor();
}
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry
.addInterceptor(getAuthInterceptor())
.addPathPatterns("/**")
.excludePathPatterns("/login")
.excludePathPatterns("/swagger-resources/**", "/webjars/**", "/v2/**", "/swagger-ui.html/**");
super.addInterceptors(registry);
}
@Override
protected void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("swagger-ui.html")
.addResourceLocations("classpath:/META-INF/resources/");
registry.addResourceHandler("/webjars/**")
.addResourceLocations("classpath:/META-INF/resources/webjars/");
super.addResourceHandlers(registry);
}
}
在addInterceptors方法中添加拦截器时，是new的一个拦截器。而并不是引入springBean容器初始化时，已经初始化好了的bean实例，并不是同一个对象，故而访问时肯定是无法引入Interceptor类里面引入的bean实例，可能产生空指针异常。
即无法引入默认注入的Bean，那么我们就自己定义一个Bean，然后在拦截器添加方法内引入这个bean即可，上面主要对此进行了处理。
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天达云。