JS跨域请求外部服务器的资源

tomcat服务器提供的接口，不能在其他域中访问的时候，需要增Access-Control-Allow-Origin:*以下操

tomcat服务器提供的接口，不能在其他域中访问的时候，需要增 Access-Control-Allow-Origin:*

以下操作均在需要被访问的项目中设置

1、编写拦截器代码

 package com.soft.filter;
/**
 * Created by Administrator on 2017/2/6.
 */
import javax.servlet.*;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class CORSFilter implements Filter {
 @Override
 public void init(FilterConfig filterConfig) throws ServletException {
 }
 @Override
 public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
 HttpServletResponse httpResponse = (HttpServletResponse) servletResponse;
 httpResponse.addHeader("Access-Control-Allow-Origin", "*");
 filterChain.doFilter(servletRequest, servletResponse);
 }
 @Override
 public void destroy() {
 }
}

2、配置web.xml

<filter>
 <filter-name>CorsFilter</filter-name>
 <filter-class>com.omiaozu.manager.filter.CORSFilter</filter-class>
</filter>
<filter-mapping>
 <filter-name>CorsFilter</filter-name>
 <url-pattern>/*</url-pattern>
</filter-mapping>

js 跨域请求资源 js服务器资源