对象转JSON正则查找替换

package com.smil.gws.wbd.labor;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.smil.gws.common.utils.GwsReportUtils;
import com.smil.gws.report.vo.WcmWarrantyClaimExportView;
import org.bouncycastle.util.StringList;

import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class test {
    public static void main(String[] args) {
        WcmWarrantyClaimExportView view = new WcmWarrantyClaimExportView();
        view.setStatus("10");
        view.setClaimType("2");
        view.setAdjustAdditionalLaborTimes(null);
        view.setSubmitDate("2020-01-12");
        view.setApproveDate("2020-02-12");
        view.setProductionDate("2020-03-12");
        view.setPurchaseDate("2020-03-12");
        view.setReceptionDate("2020-04-12");
        view.setClaimNo("我是-订单号");
        String ysj = JSON.toJSON(view).toString();
        System.out.println(ysj);
        String pat = "\d{4}-\d{2}-\d{2}";
        Pattern pattern = Pattern.compile(pat);
        Matcher matcher = pattern.matcher(ysj);
        List<String>  stringList  = new ArrayList<>();
        while(matcher.find()){
            stringList.add(matcher.group());
        }
        for (String s  : stringList) {
            if (ysj.contains(s)){
                ysj = ysj.replace("Date":""+s,"Date":""+s.replace("-","/"));
            }
        }
        WcmWarrantyClaimExportView wcmWarrantyClaimExportView = JSONObject.toJavaObject(JSON.parseObject(ysj), WcmWarrantyClaimExportView.class);
        System.out.println(JSON.toJSON(wcmWarrantyClaimExportView).toString());
    }
}