第一种：书写解决跨域的类

public class AccessControlAllowOriginFilter 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;
        response.setHeader("Access-Control-Allow-Origin","*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        chain.doFilter(req, response);
    }

    @Override
    public void destroy() {

    }
}

第二种：在具体方法上使用注解@CrossOrigin(origins = "*")

SpringBoot解决跨域_ide