Tomcat之——添加CROS跨源请求

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通过工具远程访问rest会出现

 已阻止跨源请求：同源策略禁止读取位于 http://XXXXX:1200/gyly/busData 的远程资源。（原因：CORS 请求失败）。

方法一：

可以将资源移动到相同的域名上 来解决这个问题。

方法二：

安装nginx反向代理

方法三:

启用 CORS

修改方法

添加Filter

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.filter.OncePerRequestFilter;

public class CorsFilter extends OncePerRequestFilter {

 @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
            throws ServletException, IOException {
    response.addHeader("Access-Control-Allow-Origin", "*");
    response.addHeader("Access-Control-Allow-Methods",
            "GET, POST, PUT, DELETE, OPTIONS");
    response.addHeader("Access-Control-Allow-Headers",
            "origin, content-type, accept, x-requested-with, sid, mycustom, smuser");
        filterChain.doFilter(request, response);
    }
}

修改web.xml

 <filter>
  <filter-name>CorsFilter</filter-name>
  <filter-class>com.interfaceservice.filter.CorsFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>CorsFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>