１．pojo类:Notice
package com.green.notice.storage; import java.util.ArrayList;
import java.util.List; public class Notice {
private int id;
private String title;
private String content;
private List<String>url=new ArrayList<String>();
private String createTime;
private String uid;
public void setUid(String uid) {
this.uid = uid;
}
public String getUid() {
return uid;
}
public void setId(int id) {
this.id = id;
}
public int getId() {
return id;
}
public void setCreateTime(String createTime) {
this.createTime = createTime;
}
public String getCreateTime() {
return createTime;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public List<String> getUrl() {
return url;
}
public void setUrl(List<String> url) {
this.url = url;
}
@Override
public String toString() {
return "Notice [title=" + title + ", content=" + content + ", url=" + url
+ "]";
} }
2 ．解析类
package com.green.notice.storage; import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List; import javax.swing.filechooser.FileView; import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
import org.xml.sax.SAXException; /*
* @author:maybo
* @date:2016-1-5
* ��ͨ����Ϣ�Ľ���
*/
public class NoticeXmlParse implements IParseXml {
private String path = "";
private String root = "notices"; /*
* @param:xml�ļ�·��
*/
public NoticeXmlParse(String path) {
this.path = path;
} @Override
public synchronized void add(Notice notice) {
try {
File file=new File(path);
if(!file.exists())
create(root);
Document document = documentFromPath(path);
Element root = document.getRootElement();
List<Element> elements = root.elements();
Element element = DocumentHelper.createElement("notice");
element.addAttribute("id", elements.size()<=0?1+"":(Integer.valueOf(
elements.get(0).attributeValue("id", null)
)+1) + "");
element.addAttribute("title", notice.getTitle());
element.addAttribute("content", notice.getContent());
element.addAttribute("createTime", notice.getCreateTime());
for (String url : notice.getUrl()) {
Element u = DocumentHelper.createElement("url");
u.setText(url);
element.add(u);
}
elements.add(0, element);
write(document);
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} } @Override
public synchronized void delete(int id) {
try {
Document document = documentFromPath(path);
Element root = document.getRootElement(); Iterator<Element> el = root.elementIterator("notice");
while (el.hasNext()) {
if ((id + "").equals(el.next().attributeValue("id", null))) {
el.remove();
}
}
write(document);
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} @Override
public List<Notice> finds() throws SAXException, DocumentException {
Document document = documentFromPath(path);
Element root = document.getRootElement();
List<Element> elements = root.elements();
List<Notice> notices = new ArrayList<Notice>();
for (Element e : elements) {
Notice notice = new Notice();
notice.setContent(e.attributeValue("content", null));
notice.setCreateTime(e.attributeValue("createTime", null));
notice.setId(Integer.valueOf(e.attributeValue("id", null)));
notice.setTitle(e.attributeValue("title", null));
List<String> urls = new ArrayList<String>();
List<Element> urlsEl = e.elements("url");
for (Element u : urlsEl) {
urls.add(u.getText());
notice.setUrl(urls);
}
notices.add(notice);
}
return notices;
} @Override
public List<Notice> finds(int index, int offset) throws SAXException,
DocumentException {
Document document = documentFromPath(path);
Element root = document.getRootElement();
List<Element> elements = root.elements();
if (offset < elements.size()) {
elements = elements.subList(index, offset);
}
List<Notice> notices = new ArrayList<Notice>();
for (Element e : elements) {
Notice notice = new Notice();
notice.setContent(e.attributeValue("content", null));
notice.setCreateTime(e.attributeValue("createTime", null));
notice.setId(Integer.valueOf(e.attributeValue("id", null)));
notice.setTitle(e.attributeValue("title", null));
List<String> urls = new ArrayList<String>();
List<Element> urlsEl = e.elements("url");
for (Element u : urlsEl) {
urls.add(u.getText());
notice.setUrl(urls);
}
notices.add(notice);
}
return notices;
} private Document documentFromPath(String path) throws SAXException,
DocumentException {
SAXReader reader = new SAXReader();
Document document=null;
if(new File(path).exists()){
document = reader.read(new File(path));
}
return document;
} @Override
public void create(String root) throws DocumentException, IOException {
// �Ű�����ĸ�ʽ
OutputFormat format = OutputFormat.createPrettyPrint();
// ����
format.setEncoding("UTF-8"); XMLWriter writer = new XMLWriter(new OutputStreamWriter(
new FileOutputStream(new File(path)), "UTF-8"), format);
Document document = DocumentHelper.createDocument();
Element elementRoot = DocumentHelper.createElement(root);
document.setRootElement(elementRoot);
writer.write(document);
// �����
writer.flush();
// �رղ���
writer.close(); } private void write(Document document) throws IOException {
// �Ű�����ĸ�ʽ
OutputFormat format = OutputFormat.createPrettyPrint();
// ����
format.setEncoding("UTF-8"); XMLWriter writer = new XMLWriter(new OutputStreamWriter(
new FileOutputStream(new File(path)), "UTF-8"), format);
writer.write(document);
// �����
writer.flush();
// �رղ���
writer.close();
} @Override
public int total() throws SAXException, DocumentException, IOException {
File file=new File(path);
if(!file.exists())
create(root);
Document document = documentFromPath(path);
Element root = document.getRootElement();
List<Element> elements = root.elements();
return elements.size();
} @Override
public synchronized void clearEnd() throws IOException, SAXException, DocumentException {
Document document = documentFromPath(path);
Element root = document.getRootElement();
List<Element> elements = root.elements();
elements.remove(elements.size()-1);
write(document);
} }