PreparedStatement 接口的setCharacterStream()方法用于将字符信息设置到parameterIndex 中。为了将文件存储到数据库中，表中使用了 CLOB(字符大对象)数据类型。例如：

CREATE TABLE  "FILETABLE"   
   (    "ID" NUMBER,   
        "NAME" CLOB  
   )

示例代码：

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

public class StoreFile {

    public static void main(String[] args) {
        try {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe", "system", "oracle");

            PreparedStatement ps = con.prepareStatement("insert into filetable values(?,?)");

            File f = new File("d:\\myfile.txt");
            FileReader fr = new FileReader(f);

            ps.setInt(1, 101);
            ps.setCharacterStream(2, fr, (int) f.length());
            int i = ps.executeUpdate();
            System.out.println(i + " records affected");

            con.close();

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