java存取clob字段时遇到的问题

03-05-28 geng615
//数据库oracle8.16;jdk1.31;
//处理clob字段时,无论存取,都报SQLException。“ORA-01002 :读取违反顺序”;
//使用表(testclob)结构 id number,clobobj clob;只有两个字段;
//下面注释中说明了异常出现的地方;
import java.sql.*;
import java.io.*;

public class TestClob {
public static void main(String args[]){
String serverName = "192.168.2.142";
String sDBDriver = "oracle.jdbc.driver.OracleDriver";
String sConnStr = "jdbc:oracle:thin:@"+serverName+":1521:gdwx";
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try{
Class.forName(sDBDriver);
conn = DriverManager.getConnection(sConnStr, "scott", "tiger");
String sqli = "insert into TestClob values(clob_seq.nextval,empty_clob())";
String sqls = "select * from TestClob where id = (select max(id) from TestClob) for update";
stmt = conn.createStatement();
stmt.execute(sqli);
stmt.execute(sqls);
/*
stmt.execute(sqls);错误就是在这一行出现的
*/
rs = stmt.getResultSet();

if(rs.next()){
oracle.sql.CLOB clob = (oracle.sql.CLOB)rs.getClob(2);
Writer writer = clob.getCharacterOutputStream() ;
writer.write("yesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyes");
writer.flush() ;
writer.close() ;
}
}catch(Exception e ){
System.out.println(e.getMessage());
}finally{
if(conn!=null){
try{
conn.close();
}catch(Exception ee){
System.out.println(ee);
}
}
}
}
}

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