package com.imooc;

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;

import org.springframework.boot.autoconfigure.web.ResourceProperties.Chain;

public class CrosFilter implements Filter {

@Override

public void destroy() {

// TODO Auto-generated method stub

}

@Override

public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)

throws IOException, ServletException {

// TODO Auto-generated method stub

HttpServletResponse res = (HttpServletResponse)arg1;

res.addHeader("Access-Control-Allow-Origin", "*");

res.addHeader("Access-Control-Allow-Methods", "*");

// res.addHeader("Access-Control-Allow-Headers", "Content-Type");

// res.addHeader("Access-Control-Max-Age", "3600");//单位是秒

arg2.doFilter(arg0,arg1);

}

@Override

public void init(FilterConfig arg0) throws ServletException {

// TODO Auto-generated method stub

}

}

得不到OPTIONS缓存