jsp读取大对象CLOB并生成xml文件示例

【 tulaoshi.com - Web开发 】

%@ page contentType="text/html; charset=gb2312" %
%@ page info="database handler"%
%@ page import="java.io.*"%
%@ page import="java.net.*"%
%@ page import="java.lang.*"%
%@ page import="java.util.*"%
%@ page import="java.sql.*"%
%@ page import="javax.servlet.*"%
%@ page import="javax.servlet.http.*"%
%@ page import="oracle.sql.CLOB"%
%@ page import="oracle.jdbc.driver.OracleResultSet"%

html
head
meta content="text/html; charset=gb2312" http-equiv="content-type"
/head
body
%
int i=0;
String parID = request.getParameter("id_no");
String strSql;
String content="";

try{
String xmlFile = "/usr/local/tomcat/webapps/vehicles/test.xml";

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String dburl="jdbc:oracle:thin:@192.168.15.250:1521:ycdb";
Connection con=DriverManager.getConnection(dburl,"training","deep1704sea");
Statement stmt=con.createStatement();

//使用流读取CLOB或BLOB列
strSql = "select xmlgen.getxml('select * from account_holder where id_no=''0001''') from dual ";
ResultSet rs=stmt.executeQuery(strSql);
if(rs.next()){
CLOB clob = ((OracleResultSet)rs).getCLOB(1);
if(clob!=null){
Reader is = clob.getCharacterStream();
BufferedReader br = new BufferedReader(is);
String s = br.readLine();
while(s!=null){
//byte[] temp = s.getBytes("iso-8859-1");
//s = new String(temp);
content += s;
s=br.readLine();
}
}
}
//out.println(content);

//将从数据库中读出的内容写到文件中
FileOutputStream fo = new FileOutputStream(xmlFile);
PrintStream so = new PrintStream(fo);
so.println(content);
so.close();

rs.close();
stmt.close();
con.close();

}catch(Exception e){
out.println(e);
}
%
/body
/html