js 跨域请求外部服务器的资源

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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.soft.filter.CORSFilter</filter-class></filter><filter-mapping>   <filter-name>CorsFilter</filter-name>   <url-pattern>/*</url-pattern></filter-mapping>

文章转载于 http://www.cnblogs.com/joshualzb/p/5528205.html

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