现在基本都谈前后端分离，为了支持跨域，只要加一个Filter即可实现：
@Component
@Slf4j
public class CorsFilter implements Filter {
@Override
public void doFilter(ServletRequest req, ServletResponse resp,
FilterChain chain) throws IOException, ServletException {
HttpServletResponse res = (HttpServletResponse) resp;
// 这里最好不要写通配符，如果允许多个域请求数据的话，可以直接用逗号隔开："http://www.baidu.com,http://google.com"
res.setHeader("Access-Control-Allow-Origin", "*");
res.setHeader("Access-Control-Allow-Methods", "GET,POST,OPTIONS,PUT,DELETE");
res.setHeader("Access-Control-Allow-Headers", "Authorization,DNT,User-Agent,Keep-Alive,Content-Type,accept,origin,X-Requested-With");
res.setHeader("Access-Control-Allow-Credentials","true");
res.addHeader("Access-Control-Max-Age","18000");
res.addHeader("Access-Control-Expose-Headers","Content-Type,Access-Control-Allow-Origin,Access-Control-Allow-Headers,Access-Control-Request-Method,X-Requested-With,accept,Origin,Authorization");
chain.doFilter(req, resp);
}
@Override
public void init(FilterConfig filterConfig) {}
@Override
public void destroy() {}
}
添加这个Filter后，浏览器得到的返回数据：
image.png
