JDBC Tutorials - Herong's Tutorial Examples - 3.10, by Dr. Herong Yang
Inserting BLOB Values with setBytes() Method
This section describes how to insert BLOB values with the PreparedStatement.setBytes() method.
Another way to insert a binary string into a BLOB column is to create a PreparedStatement object and use the setBytes() method. See the sample program below:
/* MySqlBlobSetBytes.java * Copyright (c) HerongYang.com. All Rights Reserved. */ import java.sql.*; public class MySqlBlobSetBytes { public static void main(String [] args) { Connection con = null; try { com.mysql.cj.jdbc.MysqlDataSource ds = new com.mysql.cj.jdbc.MysqlDataSource(); ds.setServerName("localhost"); ds.setPortNumber(3306); ds.setDatabaseName("HerongDB"); ds.setUser("Herong"); ds.setPassword("TopSecret"); con = ds.getConnection(); // Deleting the record for re-testing String subject = "Test of the setBytes() method"; Statement sta = con.createStatement(); sta.executeUpdate("DELETE FROM Image WHERE Subject = '" +subject+"'"); // Inserting CLOB value with PreparedStatement.setBytes() PreparedStatement ps = con.prepareStatement( "INSERT INTO Image (Subject, Body) VALUES (?,?)"); ps.setString(1, subject); byte[] bodyIn = {(byte)0xC9, (byte)0xCB, (byte)0xBB, (byte)0xCC, (byte)0xCE, (byte)0xB9, (byte)0xC8, (byte)0xCA, (byte)0xBC, (byte)0xCC, (byte)0xCE, (byte)0xB9, (byte)0xC9, (byte)0xCB, (byte)0xBB}; ps.setBytes(2, bodyIn); int count = ps.executeUpdate(); ps.close(); // Retrieving BLOB value with getBytes() ResultSet res = sta.executeQuery( "SELECT * FROM Image WHERE Subject = '"+subject+"'"); res.next(); System.out.println("The inserted record: "); System.out.println(" Subject = "+res.getString("Subject")); System.out.println(" Body = " +new String(res.getBytes("Body"))); res.close(); sta.close(); con.close(); } catch (Exception e) { System.err.println("Exception: "+e.getMessage()); } } }
Compilation and execution of this program is below. The output confirms that the binary string value, stored in a byte array, was correctly inserted into the CLOB column:
herong> java -cp .:mysql-connector-java-8.0.19.jar MySqlBlobSetBytes.java
The inserted record:
Subject = Test of the setBytes() method
Body = ╔╦╗╠╬╣╚╩╝╠╬╣╔╦╗
Table of Contents
JDBC (Java Database Connectivity) Introduction
Installing and Running Java DB - Derby
Derby (Java DB) JDBC DataSource Objects
Java DB (Derby) - DML Statements
Java DB (Derby) - ResultSet Objects of Queries
Java DB (Derby) - PreparedStatement
MySQL JDBC Driver (MySQL Connector/J)
MySQL - Reference Implementation of JdbcRowSet
MySQL - JBDC CallableStatement
MySQL CLOB (Character Large Object) - TEXT
►MySQL BLOB (Binary Large Object) - BLOB
Overview of BLOB (Binary Large Object)
Create Tables with CLOB Columns
Inserting BLOB Values with SQL INSERT Statements
►Inserting BLOB Values with setBytes() Method
Inserting BLOB Values with setBinaryStream() Method
Closing InputStream Too Early on setBinaryStream()
Retrieving BLOB Values with getBytes() Method
Retrieving BLOB Values with getBinaryStream() Method
Retrieving BLOB Values with getBlob() Method
Inserting BLOB Values with setBlob() Method
Oracle Express Edition Installation on Windows
Oracle - Reference Implementation of JdbcRowSet
Oracle - JBDC CallableStatement
Oracle CLOB (Character Large Object) - TEXT
Oracle BLOB (Binary Large Object) - BLOB
Microsoft SQL Server Express Edition
Microsoft JDBC Driver for SQL Server
Microsoft JDBC Driver - Query Statements and Result Sets
Microsoft JDBC Driver - DatabaseMetaData Object
Microsoft JDBC Driver - DDL Statements
Microsoft JDBC Driver - DML Statements
SQL Server - PreparedStatement
SQL Server CLOB (Character Large Object) - TEXT
SQL Server BLOB (Binary Large Object) - BLOB
JDBC-ODBC Bridge Driver - sun.jdbc.odbc.JdbcOdbcDriver
JDBC-ODBC Bridge Driver - Flat Text Files
JDBC-ODBC Bridge Driver - MS Access
JDBC-ODBC Bridge Driver - MS SQL Server
Summary of JDBC Drivers and Database Servers