Question

我将从xml文件中读取数据并列出页面中元素的属性。使用我的代码，您可以读取数据并将其存储在列表中。但不幸的是，数据绑定不起作用。请帮忙..

bookHandler

public class bookHandler implements ContentHandler {

private String currentValue;

boolean tablecaption;

private boolean bookObjectCreated = false;
private boolean inbookSection = false;
bookObject currentbookObject;

private boolean inbody = false;
private boolean namebook = false;
private boolean authbook = false;

private List<bookObject> booksList = null;

public List<bookObject> getbookList() {
    return booksList;
}

public void characters(char[] ch, int start, int length) throws SAXException {
    currentValue = new String(ch, start, length);
}

public void startElement(String uri, String localName, String qname, Attributes atts) throws SAXException {

    if ((localName.equals("TABLE-PRE")) && (atts.getValue("ID").equals("action"))) {
        inbookSection = true;
    }

    if (inbookSection) {
        if (localName.equals("BODY")) {
            inbody = true;
        }
    }

    if (inbody) {
        if (localName.equals("ROW")) {

            bookObjectCreated = true;
            currentbookObject = new bookObject();
            if (booksList == null)
                booksList = new ArrayList<bookObject>();

        }
        if (bookObjectCreated) {
            if (localName.equals("ENTRY") && (atts.getValue("COLNAME").equals("col1"))) {

                namebook = true;

            } else if (localName.equals("ENTRY") && (atts.getValue("COLNAME").equals("col2"))) {

                authbook = true;

            }

        }

    }

}

public void endElement(String uri, String localName, String atts) throws SAXException {

    if (bookObjectCreated) {
        if (namebook) {
            if (atts.equals("P")) {
                currentbookObject.setName(currentValue);
                namebook = false;
            }
        }

        else if (authbook) {
            if (atts.equals("P")) {
                currentbookObject.setAuth(currentValue);
                authbook = false;
            }
        }
        if (atts.equals("ROW")) {
            bookObjectCreated = false;

            booksList.add(currentbookObject);
            authbook = false;

        }

    }

    if (atts.equals("BODY")) {

        inbody = false;
        inbookSection = false;

    }

}

bookObject.java

    public class bookObject {

    private String name;
    private String Auth;

    public bookObject() {

    }

    public String getName() {
        return name;
    }

    public String getAuth() {
        return Auth;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setAuth(String status) {
        this.Auth = status;
    }

}

Main.java

public class Main {

private String m_InputPath = "bspXml.xml";

public void createBooks() {

    // m_ResultGroups = new ResultGroups();
    try {

        XMLReader xmlReader = XMLReaderFactory.createXMLReader();
        FileReader reader = new FileReader(m_InputPath);
        InputSource inputSource = new InputSource(reader);
        xmlReader.setContentHandler(new bookHandler());
        xmlReader.parse(inputSource);

    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (SAXException e) {
        e.printStackTrace();
    }

}

}

向导

       public Wizard(App app) {
        super("wizardPage");
        //books
        App.createBooks();
    }

   public void createControl(Composite parent) {
       Composite container = new Composite(parent, SWT.NULL);

       setControl(container);
       container.setLayout(new BorderLayout(0, 0));

       checkboxTableViewer = CheckboxTableViewer.newCheckList(container, SWT.BORDER | SWT.FULL_SELECTION);

       checkboxTableViewer.setAllGrayed(true);
       checkboxTableViewer.setAllChecked(false);
       table = checkboxTableViewer.getTable();

       table.setHeaderVisible(true);
       table.setLayoutData(BorderLayout.CENTER);

       tableViewerColumn = new TableViewerColumn(checkboxTableViewer, SWT.NONE);
       tblclmnName = tableViewerColumn.getColumn();
       tblclmnName.setWidth(255);
       tblclmnName.setText("Name");

       tableViewerColumn_1 = new TableViewerColumn(checkboxTableViewer, SWT.NONE);
       tblclmnVariant = tableViewerColumn_1.getColumn();
       tblclmnVariant.setWidth(122);
       tblclmnVariant.setText("Author");


       m_bindingContext = iDataBindings();
   }
    protected DataBindingContext iDataBindings() {
        DataBindingContext bindingContext = new DataBindingContext();
        //
        IObservableValue observeTextTblclmnNameObserveWidget = WidgetProperties.text().observe(tblclmnName);
        IObservableValue namebookObjectObserveValue = PojoProperties.value("name").observe(bookObject);
        bindingContext.bindValue(observeTextTblclmnNameObserveWidget, namebookObjectObserveValue, null, null);
        //
        IObservableValue observeTextTblclmnVariantObserveWidget = WidgetProperties.text().observe(tblclmnVariant);
        IObservableValue statusbookObjectObserveValue = PojoProperties.value("author").observe(bookObject);
        bindingContext.bindValue(observeTextTblclmnVariantObserveWidget, statusbookObjectObserveValue, null, null);
        //

        return bindingContext;
    }
}

XML

<?xml version="1.0" encoding="iso-8859-1" ?>
<BOOK>
<TABLE>
<TABLE-PRE ID="sinceBook">
   <NAME>sinceBook</NAME>
</TABLE-PRE>

 </TABLE>

<TABLE>
 <TABLE-PRE ID="actionBook">
   <NAME>actionBook</NAME>
 </TABLE-PRE>

  <TABLEGR COLS="2">
            <COLSPE COLNUM="1" COLWIDTH="4.31*" COLNAME="col1"/>
            <COLSPE COLNUM="2" COLWIDTH="1.00*" COLNAME="col2"/>            
            <TD>
              <ROW>
                <ENTRY COLNAME="col1">
                  <P>Name</P>
                </ENTRY>
                <ENTRY COLNAME="col2">
                  <P>Author</P>
                </ENTRY>
              </ROW>
            </TD>
            <BODY>
              <ROW>
                <ENTRY COLNAME="col1">
                  <P>Harry Potter </P>
                </ENTRY>
                <ENTRY COLNAME="col2">
                  <P>Joanne K. Rowling</P>

Answer 1

即使没有仔细阅读您的代码，我也想提一下，您正在努力工作以实现您的需求。使用JAXB将XML模式映射到java类。在15分钟内学习基础知识，在模型类上加上适当的注释，编写3-4行代码，然后就完成了。

修改

首先看一下本教程：http://www.vogella.com/tutorials/JAXB/article.html

或者在Web上搜索任何其他JAXB教程。

如何在java中绑定数据？

1 个答案: