dom4j操作添加和删除元素--移除多余空行

￡神魔★判官ぃ 2023-02-27 05:29 53阅读 0赞

public static List<Element> parseXML(HashMap<String, List<String>> map) throws Exception {
    
            // 创建saxreader对象
            SAXReader reader = new SAXReader();
            // 读取一个文件，把这个文件转换成Document对象
            Document document = reader.read(new File("src/c2.xml"));
            // 获取根元素
            Element root = document.getRootElement();
            // 把文档转换字符串
            String docXmlText = document.asXML();
    //       System.out.println(docXmlText);    //打印文件的所有内容
            System.out.println("---------------------------");
            //user元素标签根转换的内容
            String rootXmlText = root.asXML();
    
            Element e = root.element("columns");// 获取xml文件中name元素标签 内的内容
    
            List<Element> elements = e.elements();
            for (int i = 0; i < elements.size(); i++) {
                System.out.println(elements.get(i).element("name").getData());
            }
    
            //移除columns元素
            for (Element ev:elements) {
                root.element("columns").remove(ev);
            }
    
            System.out.println(root.asXML());
    
            for (Map.Entry<String, List<String>> one :map.entrySet()){
                String key = one.getKey();
                List<String> value = one.getValue();
    
                if(key.equals("AIP_PLAN")){
                    for (int i = 0; i < value.size(); i++) {
                        String columnName = value.get(i);
                        for (Element ev:elements){
                            if(ev.element("name").getData().equals(columnName)){
                                root.element("columns").add(ev);
                            }
                        }
                    }
                }
            }
    
    
            try {
                OutputFormat format =OutputFormat.createPrettyPrint();
                format.setIndent(true);
                format.setNewlines(true);
                format.setNewLineAfterDeclaration(true);
                Writer fileWriter=new FileWriter("E:/AIP_PLAN.xml");
                XMLWriter xmlWriter=new XMLWriter(fileWriter,format);
                xmlWriter.write(document);
                xmlWriter.close();
            } catch (IOException ee) {
                System.out.println(ee.getMessage());
            }
    
    
            return elements;
        }

### remove  删除元素 ###

### add 添加元素 ###

### 将最终生成的xml文件，解析的好看，没有空行和两个标签在一行的情况 ###

### OutputFormat.createPrettyPrint(); ###

参考链接：

[https://blog.csdn.net/high2011/article/details/48110359][https_blog.csdn.net_high2011_article_details_48110359]

[https://blog.csdn.net/Chianz632/article/details/80358073][https_blog.csdn.net_Chianz632_article_details_80358073]

[https_blog.csdn.net_high2011_article_details_48110359]: https://blog.csdn.net/high2011/article/details/48110359
[https_blog.csdn.net_Chianz632_article_details_80358073]: https://blog.csdn.net/Chianz632/article/details/80358073