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Emmanuel Aigbovbiosa
Hello, I need sample code using java servlet and html form and explanation on how to insert and retrieve image from mysql.
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April 28, 2008 at 6:42 PM
Hi friend,
This is insert image code.
import java.sql.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class InsertImageIntoDatabase extends HttpServlet{
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";;
String db = "register";
Statement stmt = null;
ResultSet rs = null;
response.setContentType("text/html");
PrintWriter out = response.getWriter();
try{
Class.forName("com.mysql.jdbc.Driver").newInstance();
con = DriverManager.getConnection(url+db,"root","root");
PreparedStatement pst = con.prepareStatement("insert into uploadfile values(?,?,?)");
File file = new File("C:/apache-tomcat-5.5.23/webapps/jsp/red_rose2.gif");
FileInputStream fis = new FileInputStream(file);
pst.setString(1, "amardeep");
pst.setString(2, "patel");
pst.setBinaryStream(3,fis,fis.available());
int i = pst.executeUpdate();
if(i!=0){
out.println("image has been inserted");
}
else{
out.println("image is not inserted");
}
}
catch (Exception e){
System.out.println(e);
}
}
}
--------------------------
this is servlet mapping
<servlet>
<servlet-name>Inserimage</servlet-name>
<servlet-class>InsertImageIntoDatabase</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Inserimage</servlet-name>
<url-pattern>/InsertImageIntoDatabase</url-pattern>
</servlet-mapping>
This is insert image code.
import java.sql.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class InsertImageIntoDatabase extends HttpServlet{
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";;
String db = "register";
Statement stmt = null;
ResultSet rs = null;
response.setContentType("text/html");
PrintWriter out = response.getWriter();
try{
Class.forName("com.mysql.jdbc.Driver").newInstance();
con = DriverManager.getConnection(url+db,"root","root");
PreparedStatement pst = con.prepareStatement("insert into uploadfile values(?,?,?)");
File file = new File("C:/apache-tomcat-5.5.23/webapps/jsp/red_rose2.gif");
FileInputStream fis = new FileInputStream(file);
pst.setString(1, "amardeep");
pst.setString(2, "patel");
pst.setBinaryStream(3,fis,fis.available());
int i = pst.executeUpdate();
if(i!=0){
out.println("image has been inserted");
}
else{
out.println("image is not inserted");
}
}
catch (Exception e){
System.out.println(e);
}
}
}
--------------------------
this is servlet mapping
<servlet>
<servlet-name>Inserimage</servlet-name>
<servlet-class>InsertImageIntoDatabase</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Inserimage</servlet-name>
<url-pattern>/InsertImageIntoDatabase</url-pattern>
</servlet-mapping>
April 28, 2008 at 6:44 PM
This is retrive image code from database.
import java.sql.*;
import java.io.IOException;
import java.io.InputStream;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class RetriveImageExample extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
Blob photo = null;
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
String query = "SELECT image from uploadfile where firstname = 'amardeep';";
ServletOutputStream out = response.getOutputStream();
try {
conn = getMySqlConnection();
}
catch (Exception e){
response.setContentType("text/html");
out.println("<html><head><title>Person Photo</title></head>");
out.println("<body><h1>Database Connection Problem.</h1></body></html>");
return;
}
try {
stmt = conn.createStatement();
rs = stmt.executeQuery(query);
if (rs.next()) {
photo = rs.getBlob(1);
}
else {
response.setContentType("text/html");
out.println("<html><head><title>Person Photo</title></head>");
out.println("<body><h1>No photo found for id= 001 </h1></body></html>");
return;
}
response.setContentType("image/gif");
InputStream in = photo.getBinaryStream();
int length = (int) photo.length();
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
while ((length = in.read(buffer)) != -1) {
System.out.println("writing " + length + " bytes");
out.write(buffer, 0, length);
}
in.close();
out.flush();
}
catch (SQLException e) {
response.setContentType("text/html");
out.println("<html><head><title>Error: Person Photo</title></head>");
out.println("<body><h1>Error=" + e.getMessage() + "</h1></body></html>");
return;
}
finally {
try {
rs.close();
stmt.close();
conn.close();
}
catch (SQLException e) {
e.printStackTrace();
}
}
}
public static Connection getMySqlConnection() throws Exception {
String driver = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/";;
String db = "register";
String username = "root";
String password = "root";
Class.forName(driver);
Connection con = DriverManager.getConnection(url+db,"root","root");
return con;
}
}
----------------
<servlet>
<servlet-name>Retriveimage</servlet-name>
<servlet-class>RetriveImageExample</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Retriveimage</servlet-name>
<url-pattern>/RetriveImageExample</url-pattern>
</servlet-mapping>
----------------------------
import java.sql.*;
import java.io.IOException;
import java.io.InputStream;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class RetriveImageExample extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
Blob photo = null;
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
String query = "SELECT image from uploadfile where firstname = 'amardeep';";
ServletOutputStream out = response.getOutputStream();
try {
conn = getMySqlConnection();
}
catch (Exception e){
response.setContentType("text/html");
out.println("<html><head><title>Person Photo</title></head>");
out.println("<body><h1>Database Connection Problem.</h1></body></html>");
return;
}
try {
stmt = conn.createStatement();
rs = stmt.executeQuery(query);
if (rs.next()) {
photo = rs.getBlob(1);
}
else {
response.setContentType("text/html");
out.println("<html><head><title>Person Photo</title></head>");
out.println("<body><h1>No photo found for id= 001 </h1></body></html>");
return;
}
response.setContentType("image/gif");
InputStream in = photo.getBinaryStream();
int length = (int) photo.length();
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
while ((length = in.read(buffer)) != -1) {
System.out.println("writing " + length + " bytes");
out.write(buffer, 0, length);
}
in.close();
out.flush();
}
catch (SQLException e) {
response.setContentType("text/html");
out.println("<html><head><title>Error: Person Photo</title></head>");
out.println("<body><h1>Error=" + e.getMessage() + "</h1></body></html>");
return;
}
finally {
try {
rs.close();
stmt.close();
conn.close();
}
catch (SQLException e) {
e.printStackTrace();
}
}
}
public static Connection getMySqlConnection() throws Exception {
String driver = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/";;
String db = "register";
String username = "root";
String password = "root";
Class.forName(driver);
Connection con = DriverManager.getConnection(url+db,"root","root");
return con;
}
}
----------------
<servlet>
<servlet-name>Retriveimage</servlet-name>
<servlet-class>RetriveImageExample</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Retriveimage</servlet-name>
<url-pattern>/RetriveImageExample</url-pattern>
</servlet-mapping>
----------------------------
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