html采用vue中ajax调用restful api的跨域问题解决

package com.huahui.energy.common.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;

/**
* Servlet Filter implementation class CroFilter
*/
public class CroFilter implements Filter {

/**
* Default constructor.
*/
public CroFilter() {
// TODO Auto-generated constructor stub
}

/**
* @see Filter#destroy()
*/
public void destroy() {
// TODO Auto-generated method stub
}

/**
* @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
*/
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
// TODO Auto-generated method stub
if(response instanceof HttpServletResponse){
HttpServletResponse alteredResponse = ((HttpServletResponse)response);
alteredResponse.addHeader("Access-Control-Allow-Origin", "*");
alteredResponse.addHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, HEAD");
alteredResponse.addHeader("Access-Control-Allow-Headers", "X-PINGOTHER, Origin, X-Requested-With, Content-Type, Accept");
alteredResponse.addHeader("Access-Control-Max-Age", "1728000");
}

// pass the request along the filter chain
chain.doFilter(request, response);
}

/**
* @see Filter#init(FilterConfig)
*/
public void init(FilterConfig fConfig) throws ServletException {
// TODO Auto-generated method stub
}

}