WEB项目设置跨域拦截器

package com.science.filter;

import java.io.IOException;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.annotation.WebFilter;

import javax.servlet.http.HttpServletResponse;

@WebFilter(filterName = "CrosFilter", urlPatterns = "/*")

public class CrosFilter implements Filter {

    @Override

    public void destroy() {}

    @Override

    public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)

            throws IOException, ServletException {

        HttpServletResponse response = (HttpServletResponse) arg1;

        response.setHeader("Access-Control-Allow-Origin", "*");

        response.setHeader("Access-Control-Allow-Methods", "POST,GET,OPTIONS,DELETE");

        response.setHeader("Access-Control-Max-Age", "3600");

        response.setHeader("Access-Control-Allow-Headers","Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With, Token");

        arg2.doFilter(arg0, arg1);

    }

    @Override

    public void init(FilterConfig arg0) throws ServletException {

    }

}

web.xml

 <!-- 跨域 -->

        <filter>

        <filter-name>CrosFilter</filter-name>

        <filter-class>com.science.filter.CrosFilter</filter-class>

    </filter>

    <filter-mapping>

        <filter-name>CrosFilter</filter-name>

        <url-pattern>/*</url-pattern>

    </filter-mapping>