//将数据库表输出为XML文档
import org.jdom.*;
import org.jdom.output.*;
import java.sql.*;
import java.io.*;

public class databasetoxml {
public databasetoxml() {
}

public static void main(String[] args) throws Exception {
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
String url = "jdbc:oracle:thin:@192.168.128.250:1521:sample";
Connection conn = DriverManager.getConnection(url, "scott", "tiger");
PreparedStatement pstmt = conn.prepareStatement(
"select * from company order by cid",
ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
ResultSet rs = pstmt.executeQuery();
Document document = new Document(new Element("ROOT")); //创建文档ROOT元素
ResultSetMetaData rmd = rs.getMetaData();
int colcount = rmd.getColumnCount();
Element elemnetcol = new Element("COLTYPE");
for (int i = 1; i <= colcount; i++) { //列属性
elemnetcol.setAttribute(rmd.getColumnName(i),
rmd.getColumnTypeName(i));
}
document.getRootElement().addContent(elemnetcol);

while (rs.next()) { //不确定表生成XML记录
Element element0 = new Element("ROW");
for (int i = 1; i <= colcount; i++) {
element0.setAttribute(rmd.getColumnName(i),(rs.getString(i)==null?"":rs.getString(i)));
}
document.getRootElement().addContent(element0);
}
rs.close();
pstmt.close();
conn.close();
XMLOutputter outp = new XMLOutputter(Format.getPrettyFormat()); //格式华输出，产生缩进和换行

Format format = outp.getFormat();
format.setEncoding("GB2312"); //设置语言
format.setExpandEmptyElements(true); //设置输出空元素为<sample></sample>格式
outp.setFormat(format);

outp.output(document, new FileOutputStream("company.xml")); //输出XML文档
System.out.print("XML 文档生成完毕！");
}
}