记录一下，防止遗忘
第一步:建立一个类，继承自OncePerRequestFilter，代码如下:
@Component
public class CORSFilter extends OncePerRequestFilter {
protected void doFilterInternal(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, FilterChain filterChain) throws ServletException, IOException {
httpServletResponse.addHeader("Access-Control-Allow-Origin","*");
httpServletResponse.addHeader("Access-Control-Allow-Methods","GET, POST, PUT, DELETE");
httpServletResponse.addHeader("Access-Control-Allow-Headers","Content-Type");
httpServletResponse.addHeader("Access-Control-Max-Age","1800");
filterChain.doFilter(httpServletRequest,httpServletResponse);
}
}
第二步:在web.xml中配置过滤器
<filter>
<filter-name>cors</filter-name>
<filter-class>cn.answering.seller.filter.CORSFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>cors</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
