h5 ajax 跨域解决

最新推荐文章于 2025-03-04 10:27:16 发布

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本文介绍了一种通过在web.xml中添加自定义过滤器HeaderFilter来解决跨域问题的方法。该过滤器通过设置HTTP响应头来允许指定源进行跨域请求，同时支持多种请求方法和头部信息。

1.web.xml 添加filter

<!-- 跨域问题解决 -->
  <filter>
    <filter-name>header</filter-name>
    <filter-class>com.jeeplus.modules.api.common.HeaderFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>header</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <filter>

2.新建自定义过滤方法

package com.jeeplus.modules.api.common;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @TODO 头部过滤器
 * @Author 魏东
 * @Date 2019/4/11 16:04
 */
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,userId,token,accessToken");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        chain.doFilter(request, response);
    }

    public void init(FilterConfig arg0) throws ServletException {

    }

}