1.请注意此处this指向

//查询列表
queryData: function() {
    console.log("查询")
    let that = this
    $.ajax({
        type: "POST",
        url: /maturity/getByOfficeId?year= + this.ruleForm.year + &officeId= + comId,
        dataType: "json",
        async: false,
        success: function(res) {
            console.log("result111111", res)
            let getData = res.data
            that.addForm = getData
        },
        error: function (xhr, status, error, result, response) {
              var tip = xhr.responseJSON ? xhr.responseJSON.message : (val == save ? (that.dialogTitle == "创建" ? 创建失败 : 修改失败) : 提交失败)
              that.$message.error(tip);
       }
    });
},

2.application/json

contentType通常默认application/x-www-form-urlencoded，这次post请求背景已更改application/json
data: JSON.stringify(this.addForm),
data数据需要更改

$.ajax({
    type: "POST",
    url: /maturity/submit,
    dataType: "json",
    data: JSON.stringify(this.addForm),
    contentType: application/json;charset=UTF-8,
    // contentType:application/x-www-form-urlencoded,
    async: false,
    success: function(res) {
        console.log("保存提交", res)
    }
});