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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