XML文件生成工具

男娘i 2022-05-08 02:16 250阅读 0赞

## XML文件生成工具 ##

网上找了很多生成xml文件的代码，在文件比较简单的时候还可以，一旦嵌套层级比较深的时候就不行了。自己采用jdom实现了如下的版本。

将xml文件中每一个标签当做一个节点，该节点除name外还有可扩展的多个属性，该标签的值（可能是一个字符或数字，也可能是多个子节点）。

*  **节点实体类**

class XMLDataNode{
        private String name;
        private Map<String, Object> attribute;
        private List<XMLDataNode> subNodes;
        private String content;
        ...
        }

需要将数据构造成这样的树结构，然后递归遍历

*  **构造xml文件**

public static void createXML(XMLDataNode root, String localPath){
            Element rootEle = new Element(root.getName());
            Map<String, Object> attribute = root.getAttribute();
            if(ObjectUtils.isMapNotEmpty(attribute)){
                for(String key : attribute.keySet()){
                    rootEle.setAttribute(key, attribute.get(key).toString());
                }
            }
            if(StringUtils.isNotEmpty(root.getContent())){
                rootEle.setText(root.getContent());
            }
    
            getXmlFromList(rootEle, root.getSubNodes());
    
            Document doc = new Document(rootEle);
            Format format = Format.getPrettyFormat();
            XMLOutputter xmlOutputter = new XMLOutputter(format);
    
            File file = new File(localPath);
    
            try {
                OutputStream out = new FileOutputStream(file);
                xmlOutputter.output(doc, out);
    
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

*  **递归构造子节点**

public static void getXmlFromList(Element root,List<XMLDataNode> subList) {
    
            if(ObjectUtils.isListNotEmpty(subList)) {
                for (XMLDataNode dataNode : subList) {
                    Element element = new Element(dataNode.getName());
    
                    Map<String, Object> param = dataNode.getAttribute();
                    if (ObjectUtils.isMapNotEmpty(param)) {
                        for (String key : param.keySet()) {
                            element.setAttribute(key, param.get(key).toString());
                        }
                    }
    
                    if(StringUtils.isNotEmpty(dataNode.getContent())){
                        element.setText(dataNode.getContent());
                    }
                    root.addContent(element);
                    getXmlFromList(element, dataNode.getSubNodes());
                }
            }
        }

*  **举一个栗子**

public static void main(String[] args) {
    
            XMLDataNode dataNode = new XMLDataNode();
            dataNode.setName("eventTypes");
            List<XMLDataNode> abilityList = new ArrayList<>();
            XMLDataNode abilityNode = new XMLDataNode();
            abilityNode.setName("ability");
            Map<String, Object> attribute = new LinkedHashMap<>();
            attribute.put("comId", "abc");
            attribute.put("type","event_abc");
            attribute.put("expression", "abc.eventtype.ability.name.hhh");
            abilityNode.setAttribute(attribute);
    
            List<XMLDataNode> resTypeList = new ArrayList<>();
            XMLDataNode resTypeNode = new XMLDataNode();
            resTypeNode.setName("resType");
            Map<String, Object> restTypeAttribute = new LinkedHashMap<>();
            restTypeAttribute.put("type", "model");
            restTypeAttribute.put("privilegeCode", "view");
            restTypeAttribute.put("dataSrc","");
            restTypeAttribute.put("expression", "");
            restTypeAttribute.put("dataUrl","");
            restTypeAttribute.put("linkageResourceModel", "dialogTriple");
            resTypeNode.setAttribute(restTypeAttribute);
    
            List<XMLDataNode> groupList = new ArrayList<>();
            XMLDataNode groupNode = new XMLDataNode();
            groupNode.setName("eventTypeGroup");
            Map<String, Object> groupNodeAttribute = new LinkedHashMap<>();
            groupNodeAttribute.put("type", "base");
            groupNodeAttribute.put("expression", "abc.eventtype.efg.group.fff");
            groupNodeAttribute.put("display", "true");
            groupNode.setAttribute(groupNodeAttribute);
    
            List<XMLDataNode> eventTypeList = new ArrayList<>();
            XMLDataNode eventTypeNode = new XMLDataNode();
            eventTypeNode.setName("eventType");
            eventTypeNode.setContent("1120001");
            Map<String, Object> eventTypeAttribute = new LinkedHashMap<>();
            eventTypeAttribute.put("order", "1");
            eventTypeAttribute.put("expression", "abc.eventtype.efg.group.fff.1120001");
            eventTypeNode.setAttribute(eventTypeAttribute);
    
            XMLDataNode eventTypeNode2 = new XMLDataNode();
            eventTypeNode2.setName("eventType");
            eventTypeNode2.setContent("1120002");
            Map<String, Object> eventTypeAttribute2 = new LinkedHashMap<>();
            eventTypeAttribute2.put("order", "2");
            eventTypeAttribute2.put("expression", "abc.eventtype.efg.group.fff.1120002");
            eventTypeNode2.setAttribute(eventTypeAttribute2);
    
            eventTypeList.add(eventTypeNode);
            eventTypeList.add(eventTypeNode2);
            groupNode.setSubNodes(eventTypeList);
    
            groupList.add(groupNode);
            resTypeNode.setSubNodes(groupList);
            resTypeList.add(resTypeNode);
    
            abilityNode.setSubNodes(resTypeList);
            abilityList.add(abilityNode);
    
            dataNode.setSubNodes(abilityList);
    
            createXML(dataNode, "d://test2.xml");
        }

效果展示  
![在这里插入图片描述][70]

感觉这个版本最大的问题是怎么构造数据，以及递归的效率问题。小方也不知道怎么优化了。

[70]: /images/20220508/7aba29e0c7e84209a6ab5f3f3be5c7e9.png