解决跨域session 同步问题

public class BaseAction {
    /**
     * 支持跨域请求
     * @author fxd
     * @param response 
     * @since JDK 1.6
     */
    protected void crossComain(HttpServletRequest request,HttpServletResponse response){
        String[] allowDomains = {"http://www域名1","http://www域名2"};
        Set allowOrigins = new HashSet(Arrays.asList(allowDomains));
        String originHeads = request.getHeader("Origin");
        if(allowOrigins.contains(originHeads)){
            //配置跨域访问的最简单的方式是用通配符 * ，（就是不安全，所有的请求都能跨域）
            response.setHeader("Access-Control-Allow-Origin", originHeads);
            response.setHeader("Access-Control-Allow-Methods", "POST,GET,OPTIONS,DELETE,HEAD,PUT,PATCH");
            response.setHeader("Access-Control-Max-Age", "36000");
            response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept,Authorization,authorization");
            response.setHeader("Access-Control-Allow-Credentials","true");//保持跨域 Ajax 时的 Cookie
        } 
    }
}

/**
 * 测试
 */
@Controller
public class Test extends BaseAction{

    @RequestMapping("Test")
    public void test(HttpServletRequest request,HttpServletResponse response){
        //调用允许跨域方法,此接口支持跨域请求
        crossComain(request, response);
        System.out.println("支持跨域请求");
    }
}

/**
 * ajax post 跨域 request
 * @param {Object} url 请求地址
 * @param {Object} data 请求参数
 * @param {Object} success 成功回调
 * @param {Object} async 是否同步 false:同步 ture：异步
 */
function ajax_cross(url,data,success,async){
    $.ajax({
        type:"post",
        url:url,
        async:async,
        data:data,
        dataType:"json",
        xhrFields:{
            withCredentials:true
        },
        crossDomain:true,
        success:success
    });
}

$(function(){
     Test();
 });
    
 //测试
  function Test(){
     //跨域请求
     ajax_cross("/Test",{},function success(result){
          console.log(result);
     },false);
  }