an example to insert data into Oracle Clob

Step1. Insert empty_clob() into the Clob column of Oracle

Step2. Set autocommit to false

Step3. Select Clob as oracle.sql.CLOB from database

Step4. Insert String into Clob

Step5. Commit

Example:

import java.sql.*;

import java.io.*;

import oracle.jdbc.driver.OracleResultSet;

import oracle.sql.CLOB;

public class TestOracleClob implements Serializable{

public static void main(String[] args)

{

//create table test (id integer,content clob);

System.out.println("-------------------insert -----------------");

try{

DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());

Connection con = DriverManager.getConnection ("oracle server",

"loginid", "loginpassword");

//Class.forName("oracle.jdbc.driver.OracleDriver");

con.setAutoCommit(false);

//Ok 1

String sql="insert into test values(1,empty_clob())";

Statement stmt=con.createStatement();

ResultSet
rs=stmt.executeQuery(sql);

System.out.println("-------------------insert -----------------");

String sqll="select content from test where id=1 for update";

ResultSet
rss=stmt.executeQuery(sqll);

if(rss.next()){

//CLOB clob = ((OracleResultSet)rss).getCLOB(1);

oracle.sql.CLOB clob= (oracle.sql.CLOB)rss.getClob("content");

clob.putString(1,"here is a string which contains more than 4000 character");

sql="update test set content=? where id=1";

PreparedStatement
pstmt=con.prepareStatement(sql);

pstmt.setClob(1,clob);

pstmt.executeUpdate();

pstmt.close();

}

con.commit();

//Ok 2

//String sql1="insert into test values(2,empty_clob())";

//ResultSet rs3=stmt.executeQuery(sql1);

String sql12="insert into test values(?,?)";

PreparedStatement
pstmt1=con.prepareStatement(sql12);

pstmt1.setInt(1,2);

pstmt1.setClob(2,oracle.sql.CLOB.empty_lob());

pstmt1.executeUpdate();

String sqll2="select content from test where id=2 for update";

ResultSet
rss2=stmt.executeQuery(sqll2);

if(rss2.next()){

CLOB clob = ((OracleResultSet)rss2).getCLOB(1);

clob.putString(1,"affffffffffdfdfdfdddddddffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffdddfff");

String sql1="update test set content=? where id=2";

PreparedStatement
pstmt=con.prepareStatement(sql1);

pstmt.setClob(1,clob);

pstmt.executeUpdate();

pstmt.close();

}

con.commit();

rss.close();

rss2.close();

pstmt1.close();

rs.close();

stmt.close();

con.close();

System.out.println("-------------insert ok-------------");

}catch(Exception e){

System.out.println("insert:"+e);

}

System.out.println("-------------------query -----------------");

try{

String content="";

//Class.forName("oracle.jdbc.driver.OracleDriver");

DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());

Connection con = DriverManager.getConnection ("oracleserver",

"id", "pass");

Statement stmt=con.createStatement();

String sql="select content from test where id=1";

ResultSet
rs=stmt.executeQuery(sql);

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){

content+=s+",";

s=br.readLine();

}

}

}

rs.close();

stmt.close();

con.close();

System.out.println("clob:"+content);

System.out.println("-------------query ok-------------");

}catch(Exception ee){

System.out.println("Exception:"+ee);

}

}

}

未测试

转自：http://www.coderanch.com/t/299447/JDBC/java/example-insert-data-into-Oracle