这篇文章主要介绍了JS跨域请求外部服务器的资源，非常不错，具有参考借鉴价值，需要的朋友参考下吧
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>
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