springboot + 前后端分离跨域解决

1.

package com.demo.car.configure;

//配置跨域问题
import org.springframework.context.annotation.Configuration;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Configuration
public class CorsConfig implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }
    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) res;
        HttpServletRequest request = (HttpServletRequest) req;
        //String path = request.getServletPath();
        response.setHeader("Access-Control-Allow-Origin", "**************");//设置允
        //前端react项目的域名
        response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, PUT");
        response.setHeader("Access-Control-Max-Age", "3600");
        //设置允许访问cookie
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");

        if (request.getMethod().equals("OPTIONS")) {
            response.setStatus(HttpServletResponse.SC_OK);
        }else{
            chain.doFilter(request, res);
        }
    }

    @Override
    public void destroy() {

    }
}