java：写入xml文件

如何解决java：写入xml文件

| 在Java中，我需要创建如下所示的xml文件：

<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<NikuDataBus xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:noNamespaceSchemaLocation=\"../xsd/nikuxog_customObjectInstance.xsd\">
    <Header action=\"write\" externalSource=\"NIKU\" objectType=\"customObjectInstance\" version=\"8.1.0.4247\"/>
    <customObjectInstances objectCode=\"hen_allockey_p\">
        <instance instanceCode=\"MIG5033028\" objectCode=\"hen_allockey_p\"
        parentInstanceCode=\"001260\" parentObjectCode=\"project\">
            <CustomInformation>
                <ColumnValue name=\"hen_from\">200801</ColumnValue>
                <ColumnValue name=\"name\">MIG5033028</ColumnValue>
                <ColumnValue name=\"code\">MIG5033028</ColumnValue>
            <OBSAssocs/>
            <Security/>
        </instance>
    </customObjectInstances>
</NikuDataBus>

我在Google上找到了一些东西，但与我的需求不符。而且，由于我是java的新手，所以我不知道如何使它适应我的需求。谢谢您的帮助。

解决方法

我建议您改用JAXB。创建类NikuDataBus，Header，CustomInformation等。将它们标记为@XmlEntity。创建并填充对象。

NikyDataBus dataBus = new NikuDataBus();
dataBus.setHeader(....)
//etc,etc....

File f = new File(\"mydata.xml\");
Marshaller m = JAXBContext.newInstance(NikuDataBus.class,Header.class,CustomInformation.class ).createMarshaller().marshal(dataBus,f)

, 我在XStream方面有很好的经验。您只需要创建对象并使用所需的任何数据填充它们，最后只需2英镑即可获得xml的字符串。 , 不久前我遇到了类似的问题，我使用的网站使我对不同的编码方式有了很好的了解。该网站为您提供了多种不同的xml编码方式：字符串，DOM，SAX

TransformerFactory transfac = TransformerFactory.newInstance();
        Transformer trans = transfac.newTransformer();
        //create string from xml tree
        StringWriter sw = new StringWriter();
        StreamResult result = new StreamResult(sw);
        DOMSource source = new DOMSource(doc);
        trans.transform(source,result);
        String xmlString = sw.toString();

        //Writing the string to a file
        OutputStream outputStream;
        byte buf[] = xmlString.getBytes();
        outputStream = new FileOutputStream(file);
        for (byte element : buf) {
            outputStream.write(element);
        }
        outputStream.close();
        buf = null;

, 看起来您的XML基于XML模式（../xsd/nikuxog_customObjectInstance.xsd）。如果是这种情况，则可以使用XML Bean。给定XML Schema，XML Beans将产生一组Java类（或jar文件），您可以使用它们以编程方式创建XML。好处是您的XML符合XML架构。过去，我发现这种方法很有用，并且我在XML Beans方面有丰富的经验。 , 我这样解决了。这是不好看的代码，但对我有用，也许是由于复制和粘贴引起的一些错误

public class POIExcelReader {

private void setHenAllocKeyHeader(StringBuilder sb) {
    sb.append (\"<?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?>\\r\\n\"
            + \"<NikuDataBus xmlns:xsi=\\\"http://www.w3.org/2001/XMLSchema-instance\\\" xsi:noNamespaceSchemaLocation=\\\"../xsd/nikuxog_customObjectInstance.xsd\\\">\\r\\n\"
            + \"<Header action=\\\"write\\\" externalSource=\\\"NIKU\\\"objectType=\\\"customObjectInstance\\\" version=\\\"8.1.0.4247\\\"/>\\r\\n\"
            + \"<customObjectInstances objectCode=\\\"hen_allockey_p\\\">\\r\\n\"
            + \"<instance instanceCode=\\\"MIG5033028\\\" objectCode=\\\"hen_allockey_p\\\" parentInstanceCode=\\\"001260\\\" parentObjectCode=\\\"project\\\">\\r\\n\");
}

private void setHenAllocKeyBottom (StringBuilder sb) {
    sb.append (\"<OBSAssocs/>\\r\\n\"
            +\"<Security/>\\r\\n\"
            +\"</customObjectInstances>\\r\\n\" 
            + \"</NikuDataBus>\\r\\n\");
}

protected void jobRun() throws Exception {

    StringBuilder sb = new StringBuilder();
    setHenAllocKeyHeader(sb);
    String prolog = sb.toString();

    sb = new StringBuilder();
    setHenAllocKeyBottom(sb);
    String epilog = sb.toString();


    FileOutputStream fos = new FileOutputStream(\"c:\\\\test\\\\osem.xml\");
    OutputStreamWriter osw = new OutputStreamWriter(fos,Charset.forName(\"UTF-8\"));
    osw.write(prolog);
    osw.write(epilog);
    osw.flush();
    osw.close();

}
public static void main(String[] args){
try{
            job.jobRun();
    } catch (Exception e)
    {
        System.out.println(\"\");
    }
}

, 您可以使用GitHub上提供的Scilca XML Progression软件包。

Node rootNode = Node.constructNode(<NikuDataBusxmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:noNamespaceSchemaLocation=\"../xsd/nikuxog_customObjectInstance.xsd\">\");

rootNode.addChildNode(Node.constructNode(\"<Header action=\"write\" externalSource=\"NIKU\" objectType=\"customObjectInstance\" version=\"8.1.0.4247\"/>\"));

String customObj = \"<customObjectInstances objectCode=\"hen_allockey_p\">\" 
                        + \"<instance instanceCode=\"MIG5033028\" objectCode=\"hen_allockey_p\" parentInstanceCode=\"001260\" parentObjectCode=\"project\">\" 
                        + \"<CustomInformation>\"
                              + \"<ColumnValue name=\"hen_from\">200801</ColumnValue>\"
                              + \"<ColumnValue name=\"name\">MIG5033028</ColumnValue>\"
                              + \"<ColumnValue name=\"code\">MIG5033028</ColumnValue>\"
                        + \"</CustomInformation>\"
                        + \"<OBSAssocs/><Security/>\"
                        + \"</instance>\"
                        + \"</customObjectInstances>\"

  // Now build to customObject element using a VirtualXML Iterator

 XMLIterator xi = new VirtualXML.XMLIterator(customObj);
 Node customO = Node.readFromFile(xi);

 rootNode.addChildNode(customO);

 Document XmlDocument = new Document(rootNode);
 XmlDocument.addXmlDeclaration(1.0,\"UTF-8\",null);

 XMLWriter xw = XmlDocument.getWriter();
 xw.write(\"D:/file.txt\");

如何解决java：写入xml文件

解决方法

相关推荐