Photo Insert and Retrieve App
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This document contains code for inserting and retrieving a photo from a database table using JDBC. The PhotoInsert code connects to an Oracle database, prepares an INSERT statement to add a record with an integer, string, float, and binary photo file. It inserts the photo by getting an input stream from the file and setting it as a parameter. The PhotoRetrieve code similarly connects to the database, executes a SELECT query to get a result set, and retrieves the photo from the result set by getting an input stream and writing it to an output file stream.
![Photo Insert and Retrieve App
package com.nt.photo
importjava.io.File;
importjava.io.FileInputStream;
importjava.sql.DriverManager;
importjava.sql.PreparedStatement;
importjava.sql.Connection;
importjava.sql.SQLException;
publicclass PhotoInsert{
publicstaticvoidmain(String[] args) throwsException{
try{
//registerjdbcdriver
Class.forName("oracle.jdbc.driver.OracleDriver");
System.out.println("Driverclassloadedsuccessfully....");
// establishconnection
Connectioncon=(Connection)
DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","system","password");
System.out.println("ConnectionCreatedSuccessfully....");
//create PreparedStatementobject
PreparedStatementps=con.prepareStatement("insertintoempallvalues(?,?,?,?)");
//setthe valuestothe field
ps.setInt(1,234);
ps.setString(2,"Durga");
ps.setFloat(3,1400);](https://image.slidesharecdn.com/16eed430-2e91-406c-9d0d-96b41ee5abee-151228150120/85/Photo-Insert-and-Retrieve-App-1-320.jpg)
![Photo Retrieve codes
package com.nt.photo
import java.io.FileOutputStream;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class PhotoRetrieve {
public static void main(String[] args) throws Exception{
try{
//register the driver and establish connection
Class.forName("oracle.jdbc.driver.OracleDriver");
System.out.println("Driver loaded Succecssfully.... ");
Connection
con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:152
1:orcl","system","password");
System.out.println("Connection created successfully.....");](https://image.slidesharecdn.com/16eed430-2e91-406c-9d0d-96b41ee5abee-151228150120/85/Photo-Insert-and-Retrieve-App-3-320.jpg)
![int bytesRead=0;//counter variable
byte[] buffer= new byte[4096];//buffer
while((bytesRead=in.read(buffer))!=-1)//bytesRead holds the data
of buffer
{
fos.write(buffer,0,bytesRead); //0 is start position of buffer
and bytesRead is end position of buffer...
}
System.out.println("photo retrieved and send to the
destination..");
//close jdbc objects
fos.close();
in.close();
rs.close();
con.close();
}//if
}
catch(Exception e){](https://image.slidesharecdn.com/16eed430-2e91-406c-9d0d-96b41ee5abee-151228150120/85/Photo-Insert-and-Retrieve-App-5-320.jpg)
Photo Insert and Retrieve App
- 1. Photo Insert and Retrieve App package com.nt.photo importjava.io.File; importjava.io.FileInputStream; importjava.sql.DriverManager; importjava.sql.PreparedStatement; importjava.sql.Connection; importjava.sql.SQLException; publicclass PhotoInsert{ publicstaticvoidmain(String[] args) throwsException{ try{ //registerjdbcdriver Class.forName("oracle.jdbc.driver.OracleDriver"); System.out.println("Driverclassloadedsuccessfully...."); // establishconnection Connectioncon=(Connection) DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","system","password"); System.out.println("ConnectionCreatedSuccessfully...."); //create PreparedStatementobject PreparedStatementps=con.prepareStatement("insertintoempallvalues(?,?,?,?)"); //setthe valuestothe field ps.setInt(1,234); ps.setString(2,"Durga"); ps.setFloat(3,1400);
- 2. File f=newFile("C:UsersARTIFICIALPicturesACHIEVERSLOGOFINAL1.jpg"); System.out.println(f); FileInputStreamfis=newFileInputStream(f);//FileInputStreamcommunicatesviafile object System.out.println(fis); ps.setBinaryStream(4,fis,(int)f.length()); //execute the query ps.executeUpdate(); System.out.println("PhotoInserted"); //close the jdbcobject fis.close(); ps.close(); con.close(); } catch(ClassNotFoundExceptione) { System.out.println("DriverclassNotloadedsuccessfully...."); } catch (SQLExceptione) { // TODO Auto-generatedcatchblock e.printStackTrace(); } }//main }//class
- 3. Photo Retrieve codes package com.nt.photo import java.io.FileOutputStream; import java.io.InputStream; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; public class PhotoRetrieve { public static void main(String[] args) throws Exception{ try{ //register the driver and establish connection Class.forName("oracle.jdbc.driver.OracleDriver"); System.out.println("Driver loaded Succecssfully.... "); Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:152 1:orcl","system","password"); System.out.println("Connection created successfully.....");
- 4. //create JDBC Statement obj Statement st= con.createStatement(); //execute the sql Query ResultSet rs=st.executeQuery("select * from empall"); //process the ResultSet object if(rs.next()){ System.out.println(rs.getInt(1)); //get the input stream pointing to Blob value of ResultSet InputStream in=rs.getBinaryStream("ephoto"); System.out.println(in); //output Stream pointing to destination file FileOutputStream fos=new FileOutputStream("C:UsersARTIFICIALPicturesACHIEVERS FINAL.jpg"); System.out.println(fos); //buffering based logic to complete photo retrieving
- 5. int bytesRead=0;//counter variable byte[] buffer= new byte[4096];//buffer while((bytesRead=in.read(buffer))!=-1)//bytesRead holds the data of buffer { fos.write(buffer,0,bytesRead); //0 is start position of buffer and bytesRead is end position of buffer... } System.out.println("photo retrieved and send to the destination.."); //close jdbc objects fos.close(); in.close(); rs.close(); con.close(); }//if } catch(Exception e){