spring boot拦截器

1，在WebConfig中注册拦截器

package com.cepht.platform.icl.config;


import org.apache.log4j.BasicConfigurator;
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.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;


@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {


    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        BasicConfigurator.configure();
        registry.addViewController("/login").setViewName("login");
    }


    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
    }


    @Bean
    public IclInterceptor myInterceptor() {  //拦截器的实体类
        return new IclInterceptor();
    }


    @Override
    public void addInterceptors(InterceptorRegistry registry) {   //注册过滤器
        registry.addInterceptor(myInterceptor()).addPathPatterns("/**");
        super.addInterceptors(registry);
    }

 

}

2.实现过滤器接口

package com.cepht.platform.icl.config;


import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;


import com.cepht.platform.base.model.ilc.PgfOptLog;
import com.cepht.platform.icl.service.PgfOptLog.PgfOptLogService;


public class IclInterceptor implements HandlerInterceptor {
    private Logger logger = LoggerFactory.getLogger(IclInterceptor.class);


    // preHandle方法（预处理）、postHandle方法（返回处理），afterCompletion方法（后处理）。


    // （1）preHandle: 在执行controller处理之前执行，返回值为boolean
    // ,返回值为true时接着执行postHandle和afterCompletion，如果我们返回false则中断执行
    // （2）postHandle:在执行controller的处理后，在ModelAndView处理前执行
    // （3）afterCompletion ：在DispatchServlet执行完ModelAndView之后执行


    @Autowired
    private PgfOptLogService pgfoptlogservice;


    /**
     * 重写方法 请求处理之前进行调用
     * 
     * @param httpServletRequest
     * @param httpServletResponse
     * @param o
     * @return
     * @throws Exception
     * @see org.springframework.web.servlet.HandlerInterceptor#preHandle(javax.servlet.http.HttpServletRequest,
     *      javax.servlet.http.HttpServletResponse, java.lang.Object)
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse sresponse, Object o) throws Exception {
        return true;
    }


    /**
     * 重写方法 请求进行处理之后
     * 
     * @param httpServletRequest
     * @param httpServletResponse
     * @param o
     * @param modelAndView
     * @throws Exception
     * @see org.springframework.web.servlet.HandlerInterceptor#postHandle(javax.servlet.http.HttpServletRequest,
     *      javax.servlet.http.HttpServletResponse, java.lang.Object,
     *      org.springframework.web.servlet.ModelAndView)
     */
    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o,
            ModelAndView modelAndView) throws Exception {


    }


    /**
     * 重写方法 preHandle 方法的返回值为true 时才会执行。顾名思义，该方法将在整个请求结束之后
     * 
     * @param httpServletRequest
     * @param httpServletResponse
     * @param o
     * @param e
     * @throws Exception
     * @see org.springframework.web.servlet.HandlerInterceptor#afterCompletion(javax.servlet.http.HttpServletRequest,
     *      javax.servlet.http.HttpServletResponse, java.lang.Object,
     *      java.lang.Exception)
     */
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse httpServletResponse, Object o,
            Exception ex) throws Exception {
        String url = request.getRequestURI();
        if (url.startsWith("/view") || url.startsWith("/component")) {
            return;
        }
        try {
            // 插入日志逻辑
            PgfOptLog pgfOptLog = pgfoptlogservice.insertLogService(request, httpServletResponse, o, ex);
            if (pgfOptLog != null) {
                pgfoptlogservice.insertSelective(pgfOptLog);
            }
        } catch (Exception e) {
            logger.debug(e.getMessage());
        }
    }
}