一、HashMap转Json
HashMap<String, String> oldContentMap = new HashMap<>(); oldContentMap.put("id",oldProduct.getProductId().toString()); oldContentMap.put("productTitle",oldProduct.getProductTitle()); String s = JSONUtil.toJsonStr(oldContentMap);
HashMap<String, String> oldContentMap = new HashMap<>(); oldContentMap.put("id",oldProduct.getProductId().toString()); oldContentMap.put("productTitle",oldProduct.getProductTitle()); String s = JSONUtil.toJsonStr(oldContentMap);