java请求跨域问题解决方法

新建Util类，在Util中添加下面方法：

    /*
     * response请求跨域公共设置
     */
    public static HttpServletResponse SetHttpServletResponse(
            HttpServletResponse response) {
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods",
                "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
        return response;
    }
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在接口处调用此方法：

public String xxx(){
    Util.SetHttpServletResponse(response);//解决跨域
    ...
    return xxx;
}
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