【问题】

ajax跨域提交请求失败。

ajax代码

$.ajax({
			type:'post',url:'delete.action',//${basePath}/back/user/
			data:data+'&ajax=1',dataType:'text',success:function(msg){
				if(msg =="true"){
					alert("删除成功！");
				}else{
					alert("删除失败！");
				}
			},error:function(){
				alert("连接网络失败，请您检查您的网络！");
			}
		});

服务端Head增加代码

/**
	 * 返回Ajax响应字符串，将处理结果返回
	 */
	public void sendAjaxResponse(String message) {
		try {
			response.setCharacterEncoding("UTF-8");
			response.setContentType("text/json");
			response.setHeader("Access-Control-Allow-Origin","*");
			response.setHeader("Access-Control-Allow-Headers","x-requested-with,content-type");
			log.debug("-------------------响应String数据---------------------\n"+message+"\n----------------------------------------------");
			//getResponse().addHeader("Content-Length",message.getBytes("UTF-8").length+"");
			response.getWriter().print(message);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

参考

http://www.cnblogs.com/PurpleTide/archive/2011/11/06/2238293.html

JavaScript 跨域访问的问题和解决过程