Springmvc跨域过滤器

创建过滤器

将HeaderFilter文件放入到项目中，如果请求携带了自定义的header信息则需要配置在过滤器Headers中，如图：

2.把过滤器配置到web.xml中，替换自己HeaderFilter的全限定名称即可

<filter>
    <filter-name>header</filter-name>
    <filter-class>com.interceptor.HeaderFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>header</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

3.过滤器代码

package com.interceptor;

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.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


/**
 * header过滤器
 * @ClassName HeaderFilter
 * @Description TODO
 * @Author weilingjie
 * @Date 2020/6/22 21:55
 * @Version 1.0
 */
public class HeaderFilter implements Filter{

    public void destroy() {

    }

    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) res;
        String originHeader = request.getHeader("Origin");
        response.setHeader("Access-Control-Allow-Origin", originHeader);
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "0");
        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," +
                "uid, access_token, begOrigin");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("XDomainRequestAllowed","1");
        chain.doFilter(request, response);
    }

    public void init(FilterConfig arg0) throws ServletException {

    }
}

来源：oschina

链接：https://my.oschina.net/u/4539930/blog/4336298

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Java EE