Ajax的使用及后台如何传参

Ajax的使用(此处为表单序列化方式)

$.ajax({
    type: 'post',
    data: $('#newPriorityForm').serialize(),
    dataType: 'json',
    contentType: "application/x-www-form-urlencoded;charset=utf-8",
	url: url,
	async: false,
	success: function (returnMeg) {
        // 成功
	},
    error: functon(returnMeg) {
        // ajax响应失败
    }
});

后台传参

//后台输出-ajax返回值
out = response.getWriter();
ObjectMapper mapper = new ObjectMapper();
Map<String, Object> returnMessg = new HashMap<String, Object>();
out.print(mapper.writeValueAsString(returnMessg));
// mapper.writeValueAsString用于将对象转换成json