src/main/java/com/interceptor/AuthorizationInterceptor.java

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package com.interceptor;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;
import com.alibaba.fastjson.JSONObject;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import com.annotation.IgnoreAuth;
import com.entity.EIException;
import com.entity.TokenEntity;
import com.service.TokenService;
import com.utils.R;

/**
 * 权限(Token)验证
 */
@Component
public class AuthorizationInterceptor implements HandlerInterceptor {

    public static final String LOGIN_TOKEN_KEY = "Token";

    @Autowired
    private TokenService tokenService;
    
	@Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //支持跨域请求
		response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with,request-source,Token, Origin,imgType, Content-Type, cache-control,postman-token,Cookie, Accept,authorization");
        response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));

        IgnoreAuth annotation;
        if (handler instanceof HandlerMethod) {
            annotation = ((HandlerMethod) handler).getMethodAnnotation(IgnoreAuth.class);
        } else {
            return true;
        }

        //从header中获取token
        String token = request.getHeader(LOGIN_TOKEN_KEY);
        
        /**
         * 不需要验证权限的方法直接放过
         */
        if(annotation!=null) {
        	return true;
        }