SpringBoot解决前端的跨域问题

  1.我的项目是以jar包的形式部署在阿里云服务器上的，首先你得配置安全组规则开放指定端口，默认是8080，也可以通过yml或者properties文件自己指定，然后配置解决跨域的过滤器:

@Component
public class CorsFilter implements Filter {

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) res;

        HttpServletRequest reqs = (HttpServletRequest) req;

        // response.setHeader("Access-Control-Allow-Origin",reqs.getHeader("Origin"));
        response.setHeader("Access-Control-Allow-Origin","*");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, PATCH, DELETE, PUT");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
        chain.doFilter(req, res);
    }

    @Override
    public void init(FilterConfig filterConfig) {
        
    }

    @Override
    public void destroy() {
    }
}

 

2.接着maven clean  maven package通过xftp把jar包放到服务器的合适目录下

3.然后java -jar xxx.jar 启动 如果想一直启动则用nohup java -jar xxx.jar回车-->exit回车即可。

   注意:如果想关闭一直启动的jar包，则要杀死进程，删除并不管用，

   1）根据端口查看这个进程的pid：netstat -lnp|grep 8080  #8080请换为你的apache需要的端口

   2）查看进程的详细信息：ps pid

   3)  杀掉进程：kill -9 pid  (-9表示强迫进程立即停止)