xml解析实例--新闻
发布时间：2020-12-16 08:30:32 所属栏目：百科 来源：网络整理
导读：效果 解析工具 Dom解析 public class NewsDom { public ListNews getNews ( int page){ ListNews newsList = new ArrayListNews(); try { File file = new File( "news" +page+ ".xml" ); //因为已经生成，所以直接显示28日的新闻 if (!file.exists()){ URL
Dom解析 public class NewsDom {
public List<News> getNews(int page){
List<News> newsList =new ArrayList<News>();
try {
File file = new File("news"+page+".xml");
//因为已经生成，所以直接显示28日的新闻
if(!file.exists()){
URL url = new URL("http://api.avatardata.cn/GuoNeiNews/Query?key=c0342afffb154e659c0a58d4b470f4bb&page="+page+"&rows=10&dtype=xml");
URLConnection con = url.openConnection();
con.connect();
InputStream is= con.getInputStream();
OutputStream os = new FileOutputStream(file,true);
byte[] bt= new byte[1024];
int len = -1;
while((len = is.read(bt))!=-1){
os.write(bt,0,len);
}
os.flush();
os.close();
is.close();
}
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder Builder = factory.newDocumentBuilder();
Document doc = Builder.parse(file);
Element element = doc.getDocumentElement();
//System.out.println(element);
NodeList nodeList = doc.getElementsByTagName("NewsObj");
int len=nodeList.getLength();
for(int i=0;i<len;i++){
News news = new News();
int len2 = nodeList.item(i).getChildNodes().getLength();
for(int j=0;j<len2;j++){
Node node1 = nodeList.item(i).getChildNodes().item(j);
if(node1.getNodeType() ==1){
//1是元素节点
String content = node1.getFirstChild().getNodeValue();
String nodeName = node1.getNodeName();
if(content!=null&&!"".equals(content)){
if(nodeName.equals("ctime")){
news.setCtime(content);
}else if(nodeName.equals("description")){
news.setDescription(content);
}if(nodeName.equals("picUrl")){
news.setPicUrl(content);
}else if(nodeName.equals("url")){
news.setUrl(content);
}else if(nodeName.equals("title")){
news.setTitle(content);
}
}
}
}
newsList.add(news);
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (DOMException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
}
return newsList;
}
public List<News> getNews(File file){
List<News> newsList =new ArrayList<News>();
try {
if(!file.exists()){
return null;
}
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder Builder = factory.newDocumentBuilder();
Document doc = Builder.parse(file);
Element element = doc.getDocumentElement();
NodeList nodeList = doc.getElementsByTagName("NewsObj");
int len=nodeList.getLength();
for(int i=0;i<len;i++){
News news = new News();
int len2 = nodeList.item(i).getChildNodes().getLength();
for(int j=0;j<len2;j++){
Node node1 = nodeList.item(i).getChildNodes().item(j);
if(node1.getNodeType() ==1){
//1是元素节点
String content = node1.getFirstChild().getNodeValue();
String nodeName = node1.getNodeName();
if(content!=null&&!"".equals(content)){
if(nodeName.equals("ctime")){
news.setCtime(content);
}else if(nodeName.equals("description")){
news.setDescription(content);
}if(nodeName.equals("picUrl")){
news.setPicUrl(content);
}else if(nodeName.equals("url")){
news.setUrl(content);
}else if(nodeName.equals("title")){
news.setTitle(content);
}
}
}
}
newsList.add(news);
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (DOMException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
}
return newsList;
}
public class mainView {
protected Shell shell;
private Table table;
private Text filename;
private Text text;
private int page;
private List<News> newsList;
private TableColumn title;
private TableItem news1;
private TableItem news2;
private TableItem news3;
private TableItem news4;
private TableItem news5;
private TableItem news6;
private TableItem news7;
private TableItem news8;
private TableItem news9;
private TableItem news10;
/** * Launch the application. * @param args */
public static void main(String[] args) {
try {
mainView window = new mainView();
window.open();
} catch (Exception e) {
e.printStackTrace();
}
}
/** * Open the window. */
public void open() {
Display display = Display.getDefault();
createContents();
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
}
/** * Create contents of the window. */
protected void createContents() {
shell = new Shell();
shell.setSize(557,380);
shell.setText("SWT Application");
table = new Table(shell,SWT.BORDER | SWT.FULL_SELECTION);
table.setBounds(10,10,410,240);
table.setHeaderVisible(true);
table.setLinesVisible(true);
title = new TableColumn(table,SWT.NONE);
title.setWidth(280);
title.setText("新闻 标题");
TableColumn frtime = new TableColumn(table,SWT.NONE);
frtime.setWidth(126);
frtime.setText("刷新事件");
news1 = new TableItem(table,SWT.NONE);
filename = new Text(shell,SWT.BORDER);
filename.setBounds(437,123,73,23);
filename.addKeyListener(new KeyListener() {
@Override
public void keyReleased(KeyEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void keyPressed(KeyEvent e) {
if(filename.getText()!=null&&!"".equals(filename.getText())&&e.keyCode == 13){
File file = new File(filename.getText());
if(!file.exists()){
MessageBox mb = new MessageBox(shell);
mb.setMessage("文件不存在或文件名错误");
mb.setText("error");
mb.open();
}else{
fresh(file);
}
}
}
});
Button bxml = new Button(shell,SWT.NONE);
bxml.setBounds(437,170,80,27);
bxml.setText("生成xml");
Button changejson = new Button(shell,SWT.NONE);
changejson.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
change();
}
});
changejson.setBounds(437,211,27);
changejson.setText("xml转为json");
Label lblNewLabel = new Label(shell,SWT.NONE);
lblNewLabel.setBounds(437,90,17);
lblNewLabel.setText("请输入文件名rn");
Button previous = new Button(shell,SWT.NONE);
previous.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
if(page!=1){
page--;
text.setText(""+page);
fresh(page);
}
}
});
previous.setBounds(31,261,27);
previous.setText("上一页");
Button next = new Button(shell,SWT.NONE);
next.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
page++;
text.setText(""+page);
fresh(page);
}
});
next.setBounds(310,27);
next.setText("下一页");
Label lblNewLabel_1 = new Label(shell,SWT.NONE);
lblNewLabel_1.setBounds(117,271,15,17);
lblNewLabel_1.setText("第");
text = new Text(shell,SWT.BORDER | SWT.READ_ONLY);
text.setText("1");
text.setBounds(138,265,28,23);
page=Integer.parseInt(text.getText());
Label lblNewLabel_2 = new Label(shell,SWT.NONE);
lblNewLabel_2.setBounds(176,17);
lblNewLabel_2.setText("页");
Label lblNewLabel_3 = new Label(shell,SWT.NONE);
lblNewLabel_3.setBounds(216,61,17);
lblNewLabel_3.setText("每页十行");
Label link = new Label(shell,SWT.NONE);
link.addMouseListener(new MouseAdapter() {
@Override
public void mouseDown(MouseEvent e) {
int i=table.getSelectionIndex();
System.out.println(i);
String url = newsList.get(i).getUrl();
/*try { Runtime.getRuntime().exec(url); } catch (IOException e1) { }*/
if(java.awt.Desktop.isDesktopSupported()){
try {
//创建一个URI实例
java.net.URI uri = java.net.URI.create(url);
//获取当前系统桌面扩展
java.awt.Desktop dp = java.awt.Desktop.getDesktop();
//判断系统桌面是否支持要执行的功能
if(dp.isSupported(java.awt.Desktop.Action.BROWSE)){
//获取系统默认浏览器打开链接
dp.browse(uri);
}
} catch(java.lang.NullPointerException e1){
//此为uri为空时抛出异常
} catch (java.io.IOException e1) {
//此为无法获取系统默认浏览器
}
}
}
});
link.setBounds(31,317,17);
link.setText("超链接地址");
Label Golink = new Label(shell,SWT.NONE);
Golink.setBounds(31,294,17);
Golink.setText("Go超链接");
news2 = new TableItem(table,SWT.NONE);
news3 = new TableItem(table,SWT.NONE);
news4 = new TableItem(table,SWT.NONE);
news5 = new TableItem(table,SWT.NONE);
news6 = new TableItem(table,SWT.NONE);
news7 = new TableItem(table,SWT.NONE);
news8 = new TableItem(table,SWT.NONE);
news9 = new TableItem(table,SWT.NONE);
news10 = new TableItem(table,SWT.NONE);
fresh(page);
}
private void fresh(int i){
NewsDom nd=new NewsDom();
newsList =new ArrayList<News>();
newsList=nd.getNews(i);
settext(newsList);
}
private void fresh(File file){
NewsDom nd=new NewsDom();
if(nd.getNews(file)!=null){
newsList =new ArrayList<News>();
newsList=nd.getNews(file);
settext(newsList);
}else{
MessageBox mb = new MessageBox(shell);
mb.setMessage("文件无效");
mb.setText("error");
mb.open();
}
}
private void settext(List<News> newsList){
news1.setText(new String[]{newsList.get(0).getTitle(),newsList.get(0).getCtime()});
news2.setText(new String[]{newsList.get(1).getTitle(),newsList.get(1).getCtime()});
news3.setText(new String[]{newsList.get(2).getTitle(),newsList.get(2).getCtime()});
news4.setText(new String[]{newsList.get(3).getTitle(),newsList.get(3).getCtime()});
news5.setText(new String[]{newsList.get(4).getTitle(),newsList.get(4).getCtime()});
news6.setText(new String[]{newsList.get(5).getTitle(),newsList.get(5).getCtime()});
news7.setText(new String[]{newsList.get(6).getTitle(),newsList.get(6).getCtime()});
news8.setText(new String[]{newsList.get(7).getTitle(),newsList.get(7).getCtime()});
news9.setText(new String[]{newsList.get(8).getTitle(),newsList.get(8).getCtime()});
news10.setText(new String[]{newsList.get(9).getTitle(),newsList.get(9).getCtime()});
}
private void change(){
Xml2JsonUtil xju=new Xml2JsonUtil();
File file = new File("news"+page+".xml");
String json=xju.xml2JSON(file);
Json js=new Json();
js.open(json);
}
}
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