跨域問題、過濾器中設定響應頭

在過濾器中設定響應頭      

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

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

/**
 * Description TODO 在過濾器中設定響應頭
 */
@Component
public class CrossDomainFilter implements Filter
{
    private static Logger logger = LoggerFactory
            .getLogger(CrossDomainFilter.class);

    @Override
    public void destroy()
    {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response,
                         FilterChain chain) throws IOException, ServletException
    {
        HttpServletRequest req = (HttpServletRequest) request;
        HttpServletResponse rep = (HttpServletResponse) response;

        //設定允許跨域的配置
        // 這裡填寫你允許進行跨域的主機ip（正式上線時可以動态配置具體允許的域名和IP）
        rep.setHeader("Access-Control-Allow-Origin", req.getHeader("Origin"));
        rep.setHeader("Access-Control-Allow-Origin", "*");
        // 允許的通路方法
        rep.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, OPTIONS, DELETE, PATCH");
        // Access-Control-Max-Age 用于 CORS 相關配置的緩存
        rep.setHeader("Access-Control-Max-Age", "3600");
        rep.setHeader("Access-Control-Allow-Headers", "token,Origin, X-Requested-With, Content-Type, Accept");
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json; charset=utf-8");
        String token = req.getHeader("token");//header方式
        //ResultInfo resultInfo = new ResultInfo();
        boolean isFilter = false;

        String method = ((HttpServletRequest) request).getMethod();
        rep.setStatus(HttpServletResponse.SC_OK);
        chain.doFilter(request, response);

    }

    @Override
    public void init(FilterConfig arg0) throws ServletException
    {

    }
}