java解决跨域问题的方案

最新推荐文章于 2025-03-31 08:30:00 发布

qq_24835349

最新推荐文章于 2025-03-31 08:30:00 发布

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分类专栏： JavaEE

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1、web.xml配置文件:
    <filter>
	    <filter-name>cors</filter-name>
		<filter-class>com.construct.tysfrz.CorsFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>cors</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
  
2、新增过滤器类:
package com.construct.tysfrz;
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;

import org.apache.commons.httpclient.HttpStatus;
/**
 * 解决跨域问题的过滤器
 * @author wanglz
 *
 */
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 response = (HttpServletResponse) servletResponse;

	HttpServletRequest request = (HttpServletRequest) servletRequest;

	// 指定允许其他域名访问

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

	// 响应类型

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

	// 响应头设置

	response.setHeader("Access-Control-Allow-Headers", "Content-Type, x-requested-with, X-Custom-Header, HaiYi-Access-Token");

	if ("OPTIONS".equals(request.getMethod())){

	response.setStatus(HttpStatus.SC_NO_CONTENT);

	}

	filterChain.doFilter(servletRequest, servletResponse);

	}

	@Override

	public void destroy() { }

	}