上传文件表单属性

enctype="multipart/form-data"

单选(是否选中)

checked="checked"

下拉列表(是否选中)

selected="selected"

 加密

@Autowired
private PwdEncoder pwdEncoder;
pwdEncoder.encodePassword(password);

 ajax

function chkOldPwd() {
        var Pwd = $("#old_pwd").val();
        var Mid = $("#hdfMid").val();

        if (Pwd != "") {
            var params = {"userId":Mid,"password":Pwd}; //此处参数名要注意和后台方法参数名要一致
            $.ajax({
                type : "POST",
                url : "${base}/doctor/isexist.jspx",
                data : params,
                dataType : "json",
                //contentType : "application/json; charset=utf-8",
                success : function(data) {
                    if (data.message == "true") {
                        $("#oldpwd_notice").css("color", "green");
                        $("#oldpwd_notice").html("原密码输入正确");
                    } else {
                        $("#oldpwd_notice").css("color", "red");
                        $("#oldpwd_notice").html("原密码输入错误");
                    }
                },
                error : function(err) {
                    alert("错误");
                }
            });
        } else {
            $("#oldpwd_notice").css("color", "red");
            $("#oldpwd_notice").html("请输入原密码");
        }
    }