springboot2 实现服务被跨域访问

简单粗暴
通过 servlet 过滤器 实现

package com.hwq.admin.back.config;

import org.springframework.stereotype.Component;

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

@Component
public class CrosFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) {
        // TODO 初始化时执行
    }

    /**
     * 允许跨域访问
     */
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        HttpServletResponse res = (HttpServletResponse) response;
        res.setHeader("Access-Control-Allow-Origin", "*");
        res.setHeader("Access-Control-Allow-Methods", "OPTIONS,GET,POST");
        res.setHeader("Access-Control-Max-Age", "3600");
        res.setHeader("Access-Control-Allow-Headers", "*");
        res.setHeader("Access-Control-Allow-Credentials", "true");
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {
        // TODO 销毁时执行
    }
}