java读取、生成xml文件字段

首先导入dom4.jar包

读取xml文件

基础知识

• 获得Document对象

1.读取XML文件,获得document对象              
                  SAXReader reader = new SAXReader();                
       Document   document = reader.read(new File("csdn.xml"));  
2.解析XML形式的文本,得到document对象.  
                  String text = "<csdn></csdn>";              
                  Document document = DocumentHelper.parseText(text);  
3.主动创建document对象.  
                 Document document = DocumentHelper.createDocument();             //创建根节点  
                 Element root = document.addElement("csdn"); 

• 操作节点对象

1.获取文档的根节点.  
      Element root = document.getRootElement();  
    2.取得某个节点的子节点.  
      Element element=node.element(“四大名著");  
    3.取得节点的文字  
        String text=node.getText();  
    4.取得某节点下所有名为“FourFamousNovels”的子节点，并进行遍历.  
       List nodes = rootElm.elements("FourFamousNovels");  
         for (Iterator it = nodes.iterator(); it.hasNext();) {     
      Element elm = (Element) it.next();   
    // do something  
}  
     5.对某节点下的所有子节点进行遍历.     
      for(Iterator it=root.elementIterator();it.hasNext();){       
        Element element = (Element) it.next();       
       // do something 
 }  
    6.在某节点下添加子节点  
      Element elm = newElm.addElement("水浒传");  
    7.设置节点文字.elm.setText("及时雨-宋江");  
    8.删除某节点.//childElement是待删除的节点,parentElement是其父节点  parentElement.remove(childElment);
    9.添加一个CDATA节点.Element contentElm = infoElm.addElement("content");contentElm.addCDATA(“cdata区域”); 

• 操作节点对象的属性

1.取得某节点下的某属性：Element root=document.getRootElement();//属性名 
                    Attribute attribute=root.attribute("id"); //ID属性对象
2.取得属性的文字：String text=attribute.getText();  
3.删除某属性：Attribute attribute=root.attribute("size");
            root.remove(attribute);  
4.遍历某节点的所有属性：Element root=document.getRootElement();   
       for(Iterator it=root.attributeIterator();it.hasNext();){        
           Attribute attribute = (Attribute) it.next();          
           String text=attribute.getText();          
           System.out.println(text);   
  }  
5.设置某节点的属性和文字：newMemberElm.addAttribute("name","四大名著");  
6.设置属性的文字：Attribute attribute=root.attribute("name");          
               attribute.setText("水浒传");  

简单实例

获取以下xml文件中的TargetSheetNo字段

<Request>
    <RequestMethod>GetFormFlow</RequestMethod>
    <LogOnInfo>
        <SenderIP>10.200.200.2</SenderIP>     <!-- TIPTOP IP -->
        <ReceiverIP>10.200.216.3</ReceiverIP> <!-- OA IP -->
        <EFSiteName>EFNET</EFSiteName>        <!-- OA 站台名稱 -->
        <EFLogonID>tiptop</EFLogonID>         <!-- 送簽人帳號 -->
        <TPServerIP>10.200.216.1</TPServerIP> <!-- TIPTOP IP -->
        <TPServerEnv>toptest</TPServerEnv>    <!-- TIPTOP 區域(topprod正式區/toptest測試區) -->
    </LogOnInfo>
    <RequestContent>
        <ContentText>
            <Form>
                <TargetFormID>81</TargetFormID>      <!-- OA FLOW ID azg08-->
                <TargetSheetNo>87282</TargetSheetNo> <!-- OA 單號 azg06-->
            </Form>
        </ContentText>
    </RequestContent>
</Request>

java演示

Document document = DocumentHelper.parseText(requestxml);
Element rootElement = document.getRootElement();
Element RequestContent = (Element)rootElement.elements().get(2);

Element ContentText = (Element)RequestContent.elements().get(0);
Element From = (Element)ContentText.elements().get(0);
Element TargetSheetNo = (Element)From.elements().get(0);

String requestId = TargetSheetNo.getText();

创建xml文件

创建以下xml文件

<Response>
    <ResponseType>GetFormFlow</ResponseType>
    <ResponseInfo>
        <SenderIP>192.168.1.148</SenderIP>
        <ReceiverIP>192.168.2.17</ReceiverIP>
    </ResponseInfo>
    <ResponseContent>
        <ReturnInfo>
            <ReturnStatus>Y</ReturnStatus>
            <ReturnDescribe>No Error!!</ReturnDescribe>
        </ReturnInfo>
        <ContentText>
           <URL>http://oa.bo-re-tech.com:8766/spa/workflow/static4form/index.html?_rdm=1676599748550#/main/workflow/req?requestid=97226&ismonitor=1&_key=b0u6s3</URL>
        </ContentText>
    </ResponseContent>
</Response>

String创建

String responsexml =
                "<Response>\n "+
                    "<ResponseType>GetFormFlow</ResponseType>\n"+
                    "<ResponseInfo>\n"+
                        "<SenderIP>192.168.1.148</SenderIP>\n"+
                        "<ReceiverIP>192.168.2.17</ReceiverIP>\n"+
                    "</ResponseInfo>\n"+
                    "<ResponseContent>\n"+
                        "<ReturnInfo>\n"+
                            "<ReturnStatus>Y</ReturnStatus>\n"+
                            "<ReturnDescribe>No Error!!</ReturnDescribe>\n"+
                        "</ReturnInfo>\n"+
                        "<ContentText>\n"+
                            "<URL>http://oa.bo-re-tech.com:8766/spa/workflow/static4form/index.html?ssoToken="+token+"#/main/workflow/req?requestid="+requestId+"</URL>\n"+
                        "</ContentText>\n"+
                    "</ResponseContent>\n"+
                "</Response>\n";

Element拼接

        Document document = DocumentHelper.createDocument();
        /**
         * 外层
         */
        Element Response = document.addElement("Response");
        Element ResponseType = Response.addElement("ResponseType");
        ResponseType.setText("GetFormFlow");
        Element ResponseInfo = Response.addElement("ResponseInfo");
        Element ResponseContent = Response.addElement("ResponseContent");
        /**
         * 中层
         */
        Element SenderIP = ResponseInfo.addElement("SenderIP");
        Element ReceiverIP = ResponseInfo.addElement("ReceiverIP");
        SenderIP.setText("192.168.1.148");
        ReceiverIP.setText(localIp);
        Element ReturnInfo = ResponseContent.addElement("ReturnInfo");
        Element ContentText = ResponseContent.addElement("ContentText");
        /**
         * 内层
         */
        Element ReturnStatus = ReturnInfo.addElement("ReturnStatus");
        Element ReturnDescribe = ReturnInfo.addElement("ReturnDescribe");
        Element URL = ContentText.addElement("URL");
        URL.setText("http://oa.bo-re-tech.com:8766/spa/workflow/static4form/index.html?ssoToken="+token+"#/main/workflow/req?requestid="+requestId+" ");

部分内容引用链接

原文链接：https://blog.youkuaiyun.com/u013990690/article/details/70242639

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