在后臺寫個過濾器就好了

package com.springapp.mvc.filter;

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

/**
 * Created by TaoYuan on 2017/4/26 0026.
 */
public class CrossDomainFilter implements Filter{
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with, Content-Type");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        filterChain.doFilter(servletRequest, servletResponse);
    }

    @Override
    public void destroy() {

    }
}

• web.xml設置通配

  <filter>
      <filter-name>crossDomainFilter</filter-name>
      <filter-class>com.springapp.mvc.filter.CrossDomainFilter</filter-class>
  </filter>
  <filter-mapping>
      <filter-name>crossDomainFilter</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>