Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.Reader;
import java.io.StringWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Main {
    public static void main(String[] args) throws Exception {
        Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();

        Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ORCL", "yourName", "mypwd");

        Statement stmt = conn.createStatement();

        createBlobClobTables(stmt);

        PreparedStatement pstmt = conn.prepareStatement("INSERT INTO BlobClob VALUES(40,?,?)");

        File file = new File("blob.txt");
        FileInputStream fis = new FileInputStream(file);
        pstmt.setBinaryStream(1, fis, (int) file.length());

        file = new File("clob.txt");
        fis = new FileInputStream(file);
        pstmt.setAsciiStream(2, fis, (int) file.length());
        fis.close();

        pstmt.execute();

        ResultSet rs = stmt.executeQuery("SELECT * FROM BlobClob WHERE id = 40");
        rs.next();

        java.sql.Blob blob = rs.getBlob(2);
        java.sql.Clob clob = rs.getClob("myClobColumn");

        byte blobVal[] = new byte[(int) blob.length()];
        InputStream blobIs = blob.getBinaryStream();
        blobIs.read(blobVal);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        bos.write(blobVal);
        blobIs.close();

        char clobVal[] = new char[(int) clob.length()];
        Reader r = clob.getCharacterStream();
        r.read(clobVal);
        StringWriter sw = new StringWriter();
        sw.write(clobVal);

        r.close();
        conn.close();
    }

    public static void createBlobClobTables(Statement stmt) throws Exception {
        String Sql = "CREATE TABLE BlobClob(Id NUMBER(3), b BLOB, c CLOB)";

        try {
            stmt.executeUpdate("DROP TABLE BlobClob");
        } catch (SQLException se) {
            if (se.getErrorCode() == 942)
                System.out.println("Error dropping BlobClob table:" + se.getMessage());
        }
        if (stmt.executeUpdate(Sql) == 0)
            System.out.println("BlobClob table created...");

    }
}