xmlbean.java

关于中间件学习的一些例子 关于中间件学习的一些例子

package WEB-INF.classes.xml;
/**
* XML的读写操作Bean
*/import java.io.*;
import java.util.*;
import org.jdom.*;
import org.jdom.output.*;
import org.jdom.input.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class XmlBean {
private String bookname, author, pub, price, pubdate;
public String getbookname() {
return bookname;
}
public String getauthor() {
return author;
}
public String getpub() {
return pub;
}
public String getprice() {
return price;
}
public String getpubdate() {
return pubdate;
}
public void setbookname(String bookname) {
this.bookname = bookname;
}
public void setauthor(String author) {
this.author = author;
}
public void setpub(String pub) {
this.pub = pub;
}
public void setprice(String price) {
this.price = price;
}
public void setpubdate(String pubdate) {
this.pubdate = pubdate;
}
public XmlBean() {
}
/**
* 读取XML文件所有信息
*/
public Vector LoadXML(String path) throws Exception {
Vector xmlVector = null;
FileInputStream fi = null;
try {
fi = new FileInputStream(path);
xmlVector = new Vector();
SAXBuilder sb = new SAXBuilder();
Document doc = sb.build(fi);
Element root = doc.getRootElement(); // 得到根元素
List books = root.getChildren(); // 得到根元素所有子元素的集合
Element book = null;
XmlBean xml = null;
for (int i = 0; i < books.size(); i++) {
xml = new XmlBean();
book = (Element) books.get(i); // 得到第一本书元素
xml.setbookname(book.getChild("书名").getText());
xml.setauthor(book.getChild("作者").getText());
xml.setpub(book.getChild("出版社").getText());
xml.setprice(book.getChild("价格").getText());
xml.setpubdate(book.getChild("出版日期").getText());
xmlVector.add(xml);
}
} catch (Exception e) {
System.err.println(e + "error");
} finally {
try {
fi.close();
} catch (Exception e) {
e.printStackTrace();
}
}
return xmlVector;
}
/**
* 删除XML文件指定信息
*/
public static void DelXML(HttpServletRequest request) throws Exception {
FileInputStream fi = null;
FileOutputStream fo = null;
try {
request.setCharacterEncoding("GBK");
String path = request.getParameter("path");
int xmlid = Integer.parseInt(request.getParameter("id"));
fi = new FileInputStream(path);
SAXBuilder sb = new SAXBuilder();
Document doc = sb.build(fi);
Element root = doc.getRootElement(); // 得到根元素
List books = root.getChildren(); // 得到根元素所有子元素的集合
books.remove(xmlid);// 删除指定位置的子元素
// String indent = " ";
// boolean newLines = true;
// XMLOutputter outp = new XMLOutputter(indent, newLines, "GBK");
Format format = Format.getPrettyFormat();
format.setIndent(" ");
format.setEncoding("utf-8");
XMLOutputter outp = new XMLOutputter(format);
fo = new FileOutputStream(path);
outp.output(doc, fo);
} catch (Exception e) {
System.err.println(e + "error");
} finally {
try {
fi.close();
fo.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* 添加XML文件指定信息
*/
public static void AddXML(HttpServletRequest request) throws Exception {
FileInputStream fi = null;
FileOutputStream fo = null;
try {
request.setCharacterEncoding("GBK");
String path = request.getParameter("path");
fi = new FileInputStream(path);
SAXBuilder sb = new SAXBuilder();
Document doc = sb.build(fi);
Element root = doc.getRootElement(); // 得到根元素
List books = root.getChildren(); // 得到根元素所有子元素的集合
String bookname = request.getParameter("bookname");
String author = request.getParameter("author");
String price = request.getParameter("price");
String pub = request.getParameter("pub");
String pubdate = request.getParameter("pubdate");
// Text newtext;
Element newbook = new Element("书");
Element newname = new Element("书名");
newname.setText(bookname);
newbook.addContent(newname);
Element newauthor = new Element("作者");
newauthor.setText(author);
newbook.addContent(newauthor);
Element newpub = new Element("出版社");
newpub.setText(pub);
newbook.addContent(newpub);
Element newprice = new Element("价格");
newprice.setText(price);
newbook.addContent(newprice);
Element newdate = new Element("出版日期");
newdate.setText(pubdate);
newbook.addContent(newdate);
books.add(newbook);// 增加子元素
// String indent = " ";
// boolean newLines = true;
// XMLOutputter outp = new XMLOutputter(indent, newLines, "GBK");
Format format = Format.getPrettyFormat();
format.setIndent(" ");
format.setEncoding("utf-8");
XMLOutputter outp = new XMLOutputter(format);
fo = new FileOutputStream(path);
outp.output(doc, fo);
} catch (Exception e) {
System.err.println(e + "error");
} finally {
try {
fi.close();
fo.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* 修改XML文件指定信息
*/
public static void EditXML(HttpServletRequest request) throws Exception {
FileInputStream fi = null;
FileOutputStream fo = null;
try {
request.setCharacterEncoding("GBK");
String path = request.getParameter("path");
int xmlid = Integer.parseInt(request.getParameter("id"));
fi = new FileInputStream(path);
SAXBuilder sb = new SAXBuilder();
Document doc = sb.build(fi);
Element root = doc.getRootElement(); // 得到根元素
List books = root.getChildren(); // 得到根元素所有子元素的集合
Element book = (Element) books.get(xmlid);
String bookname = request.getParameter("bookname");
String author = request.getParameter("author");
String price = request.getParameter("price");
String pub = request.getParameter("pub");
String pubdate = request.getParameter("pubdate");
// Text newtext;
Element newname = book.getChild("书名");
newname.setText(bookname);// 修改书名为新的书名
Element newauthor = book.getChild("作者");
newauthor.setText(author);
Element newpub = book.getChild("出版社");
newpub.setText(pub);
Element newprice = book.getChild("价格");
newprice.setText(price);
Element newdate = book.getChild("出版日期");
newdate.setText(pubdate);
// books.set(xmlid,book);//修改子元素
// String indent = " ";
// boolean newLines = true;
// XMLOutputter outp = new XMLOutputter(indent, newLines, "GBK");
Format format = Format.getPrettyFormat();
format.setIndent(" ");
format.setEncoding("utf-8");
XMLOutputter outp = new XMLOutputter(format);
fo = new FileOutputStream(path);
outp.output(doc, fo);
} catch (Exception e) {
System.err.println(e + "error");
} finally {
try {
fi.close();
fo.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}