web -- 前端访问后台跨区问题解决

最新推荐文章于 2024-05-25 17:21:37 发布

原创最新推荐文章于 2024-05-25 17:21:37 发布 · 142 阅读

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本文介绍了一个简单的Java Servlet过滤器实现，该过滤器用于处理HTTP跨域资源共享（CORS）问题。通过设置响应头允许所有来源访问，此过滤器可以轻松地集成到Web应用程序中以解决跨域请求限制。

package com.xindatai.ibs.web.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.http.HttpServletResponse;

public class RequestFilter implements Filter {

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletResponse res = (HttpServletResponse)response;
        res.setHeader("Access-Control-Allow-Origin", "*");
        chain.doFilter(request, response);
    }

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void destroy() {
        // TODO Auto-generated method stub
        
    }
}