Java 实现html对比差异工具类（新增、删除、修改、对调、移动）

快来打我* 2022-12-27 04:44 171阅读 0赞

### 一、前言 ###

本文将基于`springboot2.4.0`实现`html对比`差异

1.  `新增数据`
2.  `删除数据`
3.  `修改数据`
4.  `对调数据`
5.  `移动数据`

### 二、效果图 ###

html1：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MjI1NTU4_size_16_color_FFFFFF_t_70]  
html2：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MjI1NTU4_size_16_color_FFFFFF_t_70 1]  
对比结果：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4MjI1NTU4_size_16_color_FFFFFF_t_70 2]

### 三、部分代码 ###

@Slf4j
    public class MyHtmlDiffPlus { 
    
        /** * 处理文本差异信息（判断是否显示背景样式标识） * * @param params: * 参数信息 * @return: 差异文本信息 * @author : zhengqing * @date : 2020/10/22 13:35 */
        public DiffBO handleDiffData(DiffTextInfoHandleBO params) { 
            // 1、判断是否支持插入、删除、修改、对调、移动
            DiffConditionBO conditionInfo = this.handleCondition(params);
    
            String htmlOld = params.getHtmlOld();
            String htmlNew = params.getHtmlNew();
            if (StringUtils.isBlank(htmlOld)) { 
                htmlOld = "";
            }
            if (StringUtils.isBlank(htmlNew)) { 
                htmlNew = "";
            }
    
            // 2、对比数据列表
            List<DiffDataBO> diffDataList = this.getDiffDataList(htmlOld, htmlNew);
    
            // 3、判断是否为增加、删除、修改、对调时显示样式
            List<DiffShowBO> diffShowList = this.handleDiffTypeData(diffDataList, conditionInfo);
    
            // 4、移出不要的元素数据
            diffShowList.removeIf(DiffShowBO::isIfRemoveCurrentElement);
    
            // 5、移动识别处理（字数大于等于3时处理移动文本）
            this.handleMoveData(diffShowList, conditionInfo.getHasMove());
    
            // 6、统计差异文本信息
            DiffTextStatisticsInfoBO diffTextStatisticsInfo = this.handleDiffTextStatisticsData(diffShowList);
    
            // 封装返回结果
            DiffBO diffBO = new DiffBO();
            diffBO.setDiffContentHtml(this.addTagForText(diffShowList));
            diffBO.setDiffShowList(diffShowList);
            diffBO.setDiffTextStatisticsInfo(diffTextStatisticsInfo);
            return diffBO;
        }
    
        /** * 处理条件 * * @param params: * 参数 * @return: 条件结果 * @author : zhengqing * @date : 2020/11/5 14:30 */
        private DiffConditionBO handleCondition(DiffTextInfoHandleBO params) { 
            List<Integer> checkedDiffTypeList = params.getCheckedDiffTypeList();
            Boolean ifAllDiffType = params.getIfAllDiffType();
    
            // 判断是否支持插入、删除、修改、对调、移动
            boolean hasInsert = false;
            boolean hasDelete = false;
            boolean hasUpdate = false;
            boolean hasExChange = false;
            boolean hasMove = false;
    
            // 判断是否需要对比处理
            boolean ifOpenDiff = CollectionUtils.isEmpty(checkedDiffTypeList) && (ifAllDiffType == null || !ifAllDiffType);
            if (ifOpenDiff) { 
                hasInsert = false;
                hasDelete = false;
                hasUpdate = false;
                hasExChange = false;
                hasMove = false;
            } else { 
                if (ifAllDiffType != null && ifAllDiffType) { 
                    hasInsert = true;
                    hasDelete = true;
                    hasUpdate = true;
                    hasExChange = true;
                    hasMove = true;
                } else { 
                    if (!CollectionUtils.isEmpty(checkedDiffTypeList)) { 
                        for (Integer e : checkedDiffTypeList) { 
                            if (DiffTypeEnum.增加.getType().equals(e)) { 
                                hasInsert = true;
                                continue;
                            }
                            if (DiffTypeEnum.删除.getType().equals(e)) { 
                                hasDelete = true;
                                continue;
                            }
                            if (DiffTypeEnum.修改.getType().equals(e)) { 
                                hasUpdate = true;
                                continue;
                            }
                            if (DiffTypeEnum.对调.getType().equals(e)) { 
                                hasExChange = true;
                                continue;
                            }
                            if (DiffTypeEnum.移动.getType().equals(e)) { 
                                hasMove = true;
                            }
                        }
                    }
                }
            }
    
            // 封装处理结果
            DiffConditionBO result = new DiffConditionBO();
            result.setHasInsert(hasInsert);
            result.setHasDelete(hasDelete);
            result.setHasUpdate(hasUpdate);
            result.setHasExChange(hasExChange);
            result.setHasMove(hasMove);
            return result;
        }
    
        /** * 获取对比差异信息列表 * * @param htmlOld: * 旧数据 * @param htmlNew: * 新数据 * @return: 对比差异信息列表 * @author : zhengqing * @date : 2020/12/4 17:16 */
        private List<DiffDataBO> getDiffDataList(String htmlOld, String htmlNew) { 
            HtmlDiff diff = new HtmlDiff(htmlOld, htmlNew);
            String diffHtml = diff.Build();
            List<DiffDataBO> diffDataBOList = Lists.newArrayList();
            Matcher matchertDiff = Constants.DIFF_PATTERN_CONTENT.matcher(diffHtml);
            int unMatchStartIndex = 0;
            while (matchertDiff.find()) { 
                int startIndex = matchertDiff.start();
                int endIndex = matchertDiff.end();
    
                // 处理未匹配数据
                if (unMatchStartIndex != startIndex) { 
                    String unMatchDataStr = diffHtml.substring(unMatchStartIndex, startIndex);
                    diffDataBOList.add(new DiffDataBO(DiffTypeEnum.不变, unMatchDataStr));
                }
                unMatchStartIndex = endIndex;
    
                // 处理匹配数据
                String diffContent = matchertDiff.group(0);
                String diffPlainText = matchertDiff.group(2);
                if (diffContent.startsWith("<ins")) { 
                    diffDataBOList.add(new DiffDataBO(DiffTypeEnum.增加, diffPlainText));
                }
                if (diffContent.startsWith("<del")) { 
                    diffDataBOList.add(new DiffDataBO(DiffTypeEnum.删除, diffPlainText));
                }
            }
            return diffDataBOList;
        }
    
        /** * 封装不同对比类型数据,判断是否为增加、删除、修改、对调、移动（字数大于等于3时处理移动文本）时显示样式 * * @param diffList: * 对比差异数据 * @param conditionInfo: * 对比条件 * @return: 封装过后的对比差异数据 * @author : zhengqing * @date : 2020/11/5 14:35 */
        private List<DiffShowBO> handleDiffTypeData(List<DiffDataBO> diffList, DiffConditionBO conditionInfo) { 
            boolean hasInsert = conditionInfo.getHasInsert();
            boolean hasDelete = conditionInfo.getHasDelete();
            boolean hasUpdate = conditionInfo.getHasUpdate();
            boolean hasExChange = conditionInfo.getHasExChange();
    
            // 保存是否显示背景标识的判断参数
            List<DiffShowBO> diffShowList = Lists.newArrayList();
    
            for (int i = 0; i < diffList.size(); i++) { 
                DiffDataBO diffItemNow = diffList.get(i);
                String diffTextNow = diffItemNow.getText();
                DiffTypeEnum diffTypeEnumNow = diffItemNow.getTypeEnum();
    
                DiffShowBO diffShowNow = new DiffShowBO();
                diffShowNow.setDiff(diffItemNow);
                diffShowNow.setDiffText(diffTextNow);
    
                boolean isInsert = diffTypeEnumNow.equals(DiffTypeEnum.增加);
                boolean isDelete = diffTypeEnumNow.equals(DiffTypeEnum.删除);
                boolean isEqual = diffTypeEnumNow.equals(DiffTypeEnum.不变);
    
                if (isInsert) { 
                    diffShowNow.setDiffTypeEnum(DiffTypeEnum.增加);
                }
                if (isDelete) { 
                    diffShowNow.setDiffTypeEnum(DiffTypeEnum.删除);
                }
                if (isEqual) { 
                    diffShowNow.setDiffTypeEnum(DiffTypeEnum.不变);
                }
    
                if (i == 0) { 
                    boolean isShow = isEqual || (hasDelete && isDelete) || (hasInsert && isInsert);
                    diffShowNow.setIfShow(isShow);
                } else { 
                    DiffDataBO diffItemBefore = diffList.get(i - 1);
                    // 之前文本内容
                    String diffTextBefore = diffItemBefore.getText();
                    DiffTypeEnum beforeTypeEnum = diffItemBefore.getTypeEnum();
    
                    DiffShowBO diffShowDataBefore = diffShowList.get(i - 1);
                    String beforeDiffText = diffShowDataBefore.getDiffText();
                    // 删除+新增=修改
                    boolean isUpdate = beforeTypeEnum.equals(DiffTypeEnum.删除) && diffTypeEnumNow.equals(DiffTypeEnum.增加);
                    if (isUpdate) { 
                        if (hasUpdate || hasExChange) { 
                            // ☆☆☆ 标识修改 ☆☆☆ 【在修改的基础上，去识别是否为`对调`方式 ex: "这是数据测试" -> "据测试这是数" 】
                            int diffTextLength = diffTextNow.length();
                            if (diffTextLength % 2 == 0) { 
                                int diffTextBeforeLength = diffTextBefore.length();
                                // 偶数情况下判断`对调`
                                // 现在最新内容前半部分、后半部分
                                int diffTextNowCenterLength = diffTextLength / 2;
                                String diffTextFrontPartNow = diffTextNow.substring(0, diffTextNowCenterLength);
                                String diffTextLatterPartNow = diffTextNow.substring(diffTextNowCenterLength);
    
                                // 之前内容前半部分、后半部分
                                int diffTextBeforeCenterLength = diffTextBeforeLength / 2;
                                String diffTextFrontPartBefore = diffTextBefore.substring(0, diffTextBeforeCenterLength);
                                String diffTextLatterPartBefore = diffTextBefore.substring(diffTextBeforeCenterLength);
    
                                if (diffTextFrontPartNow.equals(diffTextLatterPartBefore)
                                    && diffTextLatterPartNow.equals(diffTextFrontPartBefore)) { 
                                    diffShowNow.setDiffTypeEnum(DiffTypeEnum.对调);
                                } else { 
                                    diffShowNow.setDiffTypeEnum(DiffTypeEnum.修改);
                                }
                            } else { 
                                diffShowNow.setDiffTypeEnum(DiffTypeEnum.修改);
                            }
    
                            // ① 设置本次显示样式
                            DiffTypeEnum diffTypeEnum = diffShowNow.getDiffTypeEnum();
                            if (hasInsert && diffTypeEnum.equals(DiffTypeEnum.增加)) { 
                                diffShowNow.setIfShow(true);
                            }
                            if (hasUpdate && diffTypeEnum.equals(DiffTypeEnum.修改)) { 
                                diffShowNow.setIfShow(true);
                            }
                            if (hasExChange && diffTypeEnum.equals(DiffTypeEnum.对调)) { 
                                diffShowNow.setIfShow(true);
                            }
    
                            // ② 【设置上一次删除操作不显示样式 && 不显示删除文本】（即移除上一次删除的元素内容） && 【将删除文本保存作为`data-title`虚浮提示】
                            diffShowDataBefore.setIfShow(false);
                            diffShowDataBefore.setIfRemoveCurrentElement(true);
                            diffShowNow.setDiffTextBefore(beforeDiffText);
                        } else { 
                            // 标识删除
                            if (hasDelete && isDelete) { 
                                diffShowNow.setIfShow(true);
                            }
    
                            // 标识新增 （上次为删除 这次为新增 标识为修改操作 不作为新增操作）
                            if (isInsert) { 
                                // ① 设置本次新增不显示样式
                                diffShowNow.setIfShow(false);
                                // ② 设置上一次删除不显示样式
                                diffShowDataBefore.setIfShow(false);
                            }
                        }
                    } else { 
                        // 标识删除或新增
                        boolean isShow = (hasDelete && isDelete) || (hasInsert && isInsert) || isEqual;
                        diffShowNow.setIfShow(isShow);
                    }
    
                    // 处理`对调`数据 ( 新增+不变+删除 组合数据 ， 即 新增和删除数据一致为对调数据 ) ex: "这是数据测试" -> "据测试这是数"
                    if (hasExChange && i > 1) { 
                        // 对调后的数据 -> 新增数据
                        DiffShowBO diffShowDataExChangeAfter = diffShowList.get(i - 2);
                        DiffTypeEnum exChangeAfterDiffTypeEnum = diffShowDataExChangeAfter.getDiffTypeEnum();
                        String exChangeAfterDiffText = diffShowDataExChangeAfter.getDiffText();
                        // 新增+不变+删除 = 对调
                        boolean isExChange = exChangeAfterDiffTypeEnum.equals(DiffTypeEnum.增加)
                            && beforeTypeEnum.equals(DiffTypeEnum.不变) && diffTypeEnumNow.equals(DiffTypeEnum.删除);
                        if (isExChange && diffTextNow.equals(exChangeAfterDiffText)) { 
                            // 【将新增数据和不变数据设置为一组对调数据】 && 【设置当前删除操作不显示样式 && 不显示删除文本】（即移除本次删除的元素内容）
                            diffShowDataExChangeAfter.setDiffTextBefore(beforeDiffText);
                            diffShowDataExChangeAfter.setDiffTypeEnum(DiffTypeEnum.对调);
                            diffShowDataExChangeAfter.setIfRemoveCurrentElement(false);
    
                            diffShowDataBefore.setIfShow(true);
                            diffShowDataBefore.setDiffTextBefore(exChangeAfterDiffText);
                            diffShowDataBefore.setDiffTypeEnum(DiffTypeEnum.对调);
                            diffShowDataBefore.setIfRemoveCurrentElement(false);
    
                            diffShowNow.setIfRemoveCurrentElement(true);
                        }
                    }
                }
                diffShowNow.setIndex(i);
                diffShowList.add(diffShowNow);
            }
    
            return diffShowList;
        }
    
        /** * 处理移动数据（字数大于等于3时处理移动文本） - 识别删除和新增相同的文本，然后判断 *** （删除在前 & 新增在后） || （新增在前 & * 删除在后），在删除处插入转移标签并标识转移前文本数据，在新增处插入转移标签并标识转移后的现在文本数据 * * @param diffShowList: * 差异数据列表信息 * @return: 处理过后识别到移动的数据 * @author : zhengqing * @date : 2020/11/4 10:22 */
        private List<DiffShowBO> handleMoveData(List<DiffShowBO> diffShowList, boolean hasMove) { 
            List<DiffShowBO> moveDeleteDataList = Lists.newArrayList();
            List<DiffShowBO> moveInsertDataList = Lists.newArrayList();
            for (DiffShowBO e : diffShowList) { 
                DiffTypeEnum diffTypeEnum = e.getDiffTypeEnum();
                String diffText = e.getDiffText();
                if (StringUtils.isBlank(diffText) || diffText.length() < 3) { 
                    continue;
                }
                if (diffTypeEnum.equals(DiffTypeEnum.删除)) { 
                    moveDeleteDataList.add(e);
                }
                if (diffTypeEnum.equals(DiffTypeEnum.增加)) { 
                    moveInsertDataList.add(e);
                }
            }
    
            if (CollectionUtils.isEmpty(moveDeleteDataList) || CollectionUtils.isEmpty(moveInsertDataList)) { 
                return diffShowList;
            }
    
            // 用于判断该数据是否已经绑定过移动的数据标识
            Set<Integer> moveInsertIndexSet = Sets.newHashSet();
    
            boolean ifHasMoveData;
            DiffShowBO moveDeleteItem;
            DiffShowBO moveInsertItem;
            String diffTextDelete;
            String diffTextInsert;
            Integer moveDeleteItemIndex = null;
            Integer moveInsertItemIndex = null;
            Matcher matcherDelete = null;
            Matcher matcherInsert = null;
    
            for (int i = 0; i < moveDeleteDataList.size(); i++) { 
                ifHasMoveData = false;
                moveDeleteItem = moveDeleteDataList.get(i);
                diffTextDelete = moveDeleteItem.getDiffText();
    
                for (int j = 0; j < moveInsertDataList.size(); j++) { 
                    moveInsertItem = moveInsertDataList.get(j);
                    diffTextInsert = moveInsertItem.getDiffText();
                    // （如果删除文本与新增文本相同） & （新增文本未出现过匹配的数据） -> 则 计入 移动数据
                    // 先对`差异内容`进行处理，去掉开始和结尾的`\n\r`换行符再判断是否相等
                    matcherDelete = Constants.TEXT_PATTERN_CENTER_CONTENT_LINE_FEED.matcher(diffTextDelete);
                    while (matcherDelete.find()) { 
                        diffTextDelete = matcherDelete.group();
                    }
                    matcherInsert = Constants.TEXT_PATTERN_CENTER_CONTENT_LINE_FEED.matcher(diffTextInsert);
                    while (matcherInsert.find()) { 
                        diffTextInsert = matcherInsert.group();
                    }
                    if (diffTextDelete.equals(diffTextInsert) && !moveInsertIndexSet.contains(j)) { 
                        moveInsertIndexSet.add(j);
                        ifHasMoveData = true;
                        moveDeleteItemIndex = moveDeleteItem.getIndex();
                        moveInsertItemIndex = moveInsertItem.getIndex();
                        break;
                    }
                }
    
                if (ifHasMoveData) { 
                    for (DiffShowBO e : diffShowList) { 
                        Integer currentIndex = e.getIndex();
                        // 将删除&新增的数据设置会移动数据类型
                        boolean isMoveDeleteIndex = currentIndex.equals(moveDeleteItemIndex);
                        boolean isMoveInsertIndex = currentIndex.equals(moveInsertItemIndex);
                        if (isMoveDeleteIndex || isMoveInsertIndex) { 
                            e.setDiffTypeEnum(DiffTypeEnum.移动);
                            e.setIfShow(hasMove);
                            // 在识别到的移动插入数据类型处将移动标识修改为删除的标识，组合成一对数据，返回给前端处理
                            if (isMoveInsertIndex) { 
                                e.setIndex(moveDeleteItemIndex);
                            }
                        }
                    }
                }
            }
            return diffShowList;
        }
    
        /** * 统计差异文本信息 * * @param diffShowList: * 差异数据列表信息 * @return: 差异文本统计信息 * @author : zhengqing * @date : 2020/11/9 15:08 */
        private DiffTextStatisticsInfoBO handleDiffTextStatisticsData(List<DiffShowBO> diffShowList) { 
            DiffTextStatisticsInfoBO diffTextInfo = new DiffTextStatisticsInfoBO();
    
            // 定义统计数据值
            int addNum = 0;
            int deleteNum = 0;
            int updateNum = 0;
            int exchangeNum = 0;
            int moveNum = 0;
            List<DiffTextInfoItem> textInfoAddList = Lists.newArrayList();
            List<DiffTextInfoItem> textInfoDeleteList = Lists.newArrayList();
            List<DiffTextInfoItem> textInfoUpdateList = Lists.newArrayList();
            List<DiffTextInfoItem> textInfoExchangeList = Lists.newArrayList();
            List<DiffTextInfoItem> textInfoMoveList = Lists.newArrayList();
    
            if (!CollectionUtils.isEmpty(diffShowList)) { 
                for (DiffShowBO e : diffShowList) { 
                    DiffTypeEnum diffTypeEnum = e.getDiffTypeEnum();
                    boolean ifShow = e.isIfShow();
    
                    // 只要不是不变的内容都算 `修改/删除/新增` 操作过的内容
                    if (!diffTypeEnum.equals(DiffTypeEnum.不变) && ifShow) { 
                        DiffTextInfoItem diffTextInfoItem = new DiffTextInfoItem();
                        String diffText = e.getDiffText();
                        if (StringUtils.isBlank(diffText)) { 
                            // continue;
                        }
                        diffTextInfoItem.setText(diffText);
                        diffTextInfoItem.setType(diffTypeEnum.getType());
                        diffTextInfoItem.setTypeName(diffTypeEnum.getDesc());
    
                        // 这里开始统计不同数据类型的文本数量
                        switch (diffTypeEnum) { 
                            case 增加:
                                addNum++;
                                textInfoAddList.add(diffTextInfoItem);
                                break;
                            case 删除:
                                deleteNum++;
                                textInfoDeleteList.add(diffTextInfoItem);
                                break;
                            case 修改:
                                updateNum++;
                                diffTextInfoItem.setTextBefore(e.getDiffTextBefore());
                                textInfoUpdateList.add(diffTextInfoItem);
                                break;
                            case 对调:
                                exchangeNum++;
                                diffTextInfoItem.setTextBefore(e.getDiffTextBefore());
                                textInfoExchangeList.add(diffTextInfoItem);
                            case 移动:
                                moveNum++;
                                // diffTextInfoItem.setTextBefore(e.getDiffTextBefore());
                                textInfoMoveList.add(diffTextInfoItem);
                                break;
                            default:
                                break;
                        }
    
                    }
                }
    
                // 装载数据
                diffTextInfo.setAddNum(addNum);
                diffTextInfo.setDeleteNum(deleteNum);
                diffTextInfo.setUpdateNum(updateNum);
                diffTextInfo.setExchangeNum(exchangeNum);
                diffTextInfo.setMoveNum(moveNum == 0 ? 0 : moveNum / 2);
                diffTextInfo.setTextInfoAddList(textInfoAddList);
                diffTextInfo.setTextInfoDeleteList(textInfoDeleteList);
                diffTextInfo.setTextInfoUpdateList(textInfoUpdateList);
                diffTextInfo.setTextInfoExchangeList(textInfoExchangeList);
                diffTextInfo.setTextInfoMoveList(textInfoMoveList);
            }
    
            return diffTextInfo;
        }
    
        /** * 正则表达式替换匹配内容并为其加标签 * * @param diffShowList: * 对比数据 * @return: 拿到对比后差异文本信息 * @author : zhengqing * @date : 2020/10/30 13:59 */
        private String addTagForText(List<DiffShowBO> diffShowList) { 
            StringJoiner diffHtml = new StringJoiner("");
            for (DiffShowBO diffItem : diffShowList) { 
                boolean ifShow = diffItem.isIfShow();
                if (!ifShow) { 
                    continue;
                }
                Integer index = diffItem.getIndex();
                String diffText = diffItem.getDiffText();
                DiffTypeEnum diffTypeEnum = diffItem.getDiffTypeEnum();
                DiffDataBO diff = diffItem.getDiff();
                DiffTypeEnum oldTypeEnum = diff.getTypeEnum();
                String diffTextBefore = diffItem.getDiffTextBefore();
                // 反转义HTML处理
                diffTextBefore = escapeHtml(diffTextBefore);
                switch (diffTypeEnum) { 
                    case 增加:
                        diffText = String.format(Constants.TEXT_DIFF_HTML_CODE_TEXT_INSERT, "%s", "%s", diffText);
                        break;
                    case 删除:
                        diffText = String.format(Constants.TEXT_DIFF_HTML_CODE_TEXT_DELETE, "%s", "%s", diffText);
                        break;
                    case 修改:
                        diffText =
                            String.format(Constants.TEXT_DIFF_HTML_CODE_TEXT_UPDATE, "%s", "%s", diffTextBefore, diffText);
                        break;
                    case 对调:
                        if (DiffTypeEnum.增加 == oldTypeEnum) { 
                            diffText = String.format(Constants.TEXT_DIFF_HTML_CODE_TEXT_EXCHANGE_BEFORE, "%s", "%s",
                                diffTextBefore, diffText);
                        }
                        if (DiffTypeEnum.不变 == oldTypeEnum) { 
                            diffText = String.format(Constants.TEXT_DIFF_HTML_CODE_TEXT_EXCHANGE_AFTER, "%s", "%s",
                                diffTextBefore, diffText);
                        }
                        break;
                    case 移动:
                        if (DiffTypeEnum.删除 == oldTypeEnum) { 
                            diffText =
                                String.format(Constants.TEXT_DIFF_HTML_CODE_TEXT_MOVE_BEFORE, index, "%s", "%s", diffText);
                        }
                        if (DiffTypeEnum.增加 == oldTypeEnum) { 
                            diffText =
                                String.format(Constants.TEXT_DIFF_HTML_CODE_TEXT_MOVE_AFTER, index, "%s", "%s", diffText);
                        }
                        break;
                    default:
                        break;
                }
                diffHtml.add(diffText);
            }
            return this.addCssForText(diffHtml.toString());
        }
    
        /** * 添加css样式 * * @param diffHtml: * 对比文本差异信息 * @return: 处理数据 * @author : zhengqing * @date : 2020/12/7 13:42 */
        private String addCssForText(String diffHtml) { 
            Document doc = Jsoup.parseBodyFragment(diffHtml);
            Element head = doc.head();
            head.append("<link href=\"diff.css\" rel=\"stylesheet\" type=\"text/css\">");
            return doc.html();
        }
    
        /** * html转义处理 * * @param html: * 富文本 * @return: 处理过后的html * @author : zhengqing * @date : 2020/10/27 11:42 */
        private String escapeHtml(String html) { 
            if (StringUtils.isBlank(html)) { 
                return html;
            }
            // html转义处理
            html = html.replaceAll("\"", """);
            html = html.replaceAll("<", "<");
            html = html.replaceAll(">", ">");
            return html;
        }
    
    }

### 四、项目地址 ###

[https://gitee.com/zhengqingya/html-diff-util][https_gitee.com_zhengqingya_html-diff-util]

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> 今日分享语句：
> 
> 1.  对过去，要淡；
> 2.  对现在，要惜；
> 3.  对未来，要信；

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[https_gitee.com_zhengqingya_html-diff-util]: https://gitee.com/zhengqingya/html-diff-util