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jsp读取大对象CLOB并生成xml文件示例

51自学网 2015-09-11 http://www.51zixue.net
<%@ 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>

 

 

 
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