SpringBoot使用Interceptor(拦截器)的集成配置

第一步

增加Interceptor类，实现HandlerInterceptor接口。

import com.alibaba.fastjson.JSONObject;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;

/**
 * @author ：Mall
 * @date ：Created in 2021-02-26
 * @description ：
 */
@Component
public class RequestInterceptor implements HandlerInterceptor {

    /**
     * 这个方法是在访问接口之前执行的
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        
        return true;
    }
}

第二步

增加WebConfiguration，实现【WebMvcConfigurer】或【WebMvcConfigurationSupport】接口

import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.*;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;

/**
 * @version: v1.0
 **/
@Configuration
public class BaseConfiguration extends WebMvcConfigurationSupport {

    @Autowired
    private RequestInterceptor requestInterceptor;

    @Override
    protected void addInterceptors(InterceptorRegistry registry) {
        String[] filterPath = {
          "要拦截的地址"
        };

        registry.addInterceptor(requestInterceptor).addPathPatterns(filterPath);
    }

}

注：此处需要注意，如果配置类是实现的WebMvcConfigurer类，要查一下代码中是否有WebMvcConfigurationSupport类，因为优先要使用WebMvcConfigurationSupport，否则addInterceptor无法加载。