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@@ -0,0 +1,29 @@
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+package com.happy.filter;
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+
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+import javax.servlet.*;
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+import javax.servlet.http.HttpServletResponse;
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+import java.io.IOException;
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+
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+public class CrosFilter implements Filter{
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+
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+ @Override
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+ public void init(FilterConfig filterConfig) throws ServletException {
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+
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+ }
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+
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+ @Override
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+ public void doFilter(ServletRequest req, ServletResponse res, FilterChain filterChain) throws IOException, ServletException {
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+ //相应之前设置响应的头部，授权跨域访问
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+ HttpServletResponse response = (HttpServletResponse) res;
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+ response.setHeader("Pragma", "no-cache");
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+ response.setHeader("Cache-Control", "no-cache");
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+ response.setHeader("Access-Control-Allow-Origin", "*");
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+ response.setDateHeader("Expires", 0);
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+ //放行
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+ filterChain.doFilter(req,res);
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+ }
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+ @Override
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+ public void destroy() {
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+
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+ }
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+}
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