jquery异步提交表单

//异步提交form表单
$.post('save.do', $('form#formId').serialize(), function(data){
if(data == "success"){
alert('保存成功');
}else{
alert('请重试');
}
}, 'text');

//Controller
public void save(PrintWriter out){
xxx.save(xx);
out.write("success");
out.flush();
}