在oracle中插入CLOB字段(JDK1.5以后)

import java.sql.*;
import java.io.*;

public class TestClob{
public void TestClob(){}
public static void main(String args[]){
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
Connectionconn=DriverManager.getConnection ("jdbc:oracle:thin:@localhost:1521:ora32","tjpt","tjpt");

conn.setAutoCommit(false);
//第一步：插入一个空的CLOB
String sql1="insert into news(content,id) values (EMPTY_CLOB(),'1')";
PreparedStatement ps1=conn.prepareStatement(sql1,new String[]{"id"});
ps1.executeUpdate();
ResultSet rs1 = ps.getGeneratedKeys();
rs1.next();
int id = rs1.getInt(1);
ps1.close();

//第二步：取出该CLOB
String sql2="select content from news where id=? for update";
PreparedStatement ps2=conn.prepareStatement(sql2);

ps2.setInt(1, id);
ResultSet rs2=ps2.executeQuery();
while (rs2.next()){
　　CLOB clob = (CLOB) rs2.getClob(1);
     clob.truncate(0l);
     clob.setString(1,bean.getNcontent());

}
conn.commit();
}
catch(Exception e){e.printStackTrace();}
}

}

既然插入进去了，那我们还得要检验一下：插进去的是不是你想插进去的内容？以下就是读取CLOB的代码：

import java.sql.*;
import java.io.*;
public class ReadClob{
public void ReadClob(){}
public static void main(String args[]){
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ora32","tjpt","tjpt"); String sql1="select content from news";
PreparedStatement ps1=conn.prepareStatement(sql1);
ResultSet rs1=ps1.executeQuery();
while (rs1.next()){
oracle.sql.CLOB clob=(oracle.sql.CLOB)rs1.getClob(1);
BufferedReader in=new BufferedReader(clob.getCharacterStream());
StringWriter out=new StringWriter();
int c;
while((c=in.read())!=-1){
out.write(c);
}
String content=out.toString();
System.out.println (content);//输出CLOB内容
}
}
catch(Exception e){e.printStackTrace();}
}
}