whyclj
2020-05-29 1590265d662e887dbd135feb26efd06e3b82c97f
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package com.fgkj.Filters;
 
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
 
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.omg.CORBA.Request;
 
import com.fgkj.actions.ActionUtil;
 
public class CrossDomainLimitFilter implements Filter{
    public static final int max_connect_count = 10;
    
    public final static String CROSS_DOMAIN_KEY    = "44c4a294cb66d13727c14b065dbe8548";        //跨域请求 key
        
    public void doFilter(ServletRequest req, ServletResponse resp,
            FilterChain chain) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest)req;
        HttpServletResponse response =(HttpServletResponse)resp;
        String URL=request.getRequestURI();
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        response.setContentType("text/html;charset=utf-8");
        
        //非跨域请求
        isAlowCrossDomain(response);
        chain.doFilter(request, response);
        
    }
 
    public void init(FilterConfig arg0) throws ServletException {
        
    }
 
    public void destroy() {
        
    }
    
    /**
     * 允许跨域访问
     * @param response
     */
    public void isAlowCrossDomain(HttpServletResponse response){
        response.setHeader("Access-Control-Allow-Origin", "*");                //允许跨域访问
        response.setHeader("Access-Control-Allow-Headers", "X-Requested-With,content-type,token");
        response.setHeader("Access-Control-Allow-Methods", "GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS, PATCH");
    }
    
    public static void main(String[] args) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println(sdf.format(new Date()));
    }
}