Insert Image into Database Using Servlet
This example illustrate the process of inserting image into database table using
Servlet. This type of program is useful in social networking or HR application
where it is necessary to save the uploaded photograph of the user. If the image
is stored in the database you can easily retrieve using JDBC program. In the
next section you will see a program to retrieve the image from database using
Servlet. After retrieving the image from database you can display it on the
browser.
This type of program is really very useful, which makes your program very
attractive.
How to Compile Servlet program
1. Save your file ImageInsertInTable.java
.
2. Open Command Prompt and set the class path so that it includes the servlet
api jar file. The servlet api is available in servlet-api.jar file which you can
take from tomcat's lib directory.
3. Map your servlet in web.xml file.
Here is the mapping code that you can put in web.xml file:
<servlet>
<servlet-name>ImageInsertInTable</servlet-name>
<servlet-class>ImageInsertInTable</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ImageInsertInTable</servlet-name>
<url-pattern>/ImageInsertInTable</url-pattern>
</servlet-mapping> |
4. Compile your servlet class file by using javac <file_name.java>.
command prompt> javac ImageInsertInTable.java
5. Move the class file into WEB-INF/classes directory.
6. Run your program on the Browser by url-pattern which define in web.xml
file.
You should type http://localhost:8080/MyApplication/ImageInsertInTable in your browser to test the application.
MySql Table Structure:
Here is the table structure used to store the image into database. Please not
the filed type used is blog.
CREATE TABLE `pictures` (
`id` int(11) NOT NULL auto_increment,
`image` blob,
PRIMARY KEY (`id`)
) |
ImageInsertInTable.java
import java.sql.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ImageInsertInTable extends HttpServlet{
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException{
PrintWriter pw = response.getWriter();
String connectionURL = "jdbc:mysql://192.168.10.59:3306/example";
Connection con=null;
try{
Class.forName("com.mysql.jdbc.Driver").newInstance();
con = DriverManager.getConnection(connectionURL, "root", "root");
PreparedStatement ps = con.prepareStatement("INSERT INTO pictures VALUES(?,?)");
File file =
new File("C:/apache-tomcat-6.0.16/webapps/CodingDiaryExample/images/5.jpg");
FileInputStream fs = new FileInputStream(file);
ps.setInt(1,8);
ps.setBinaryStream(2,fs,fs.available());
int i = ps.executeUpdate();
if(i!=0){
pw.println("image inserted successfully");
}
else{
pw.println("problem in image insertion");
}
}
catch (Exception e){
System.out.println(e);
}
}
}
|
Program description:
The following code is actually used to save the image data into database.
PreparedStatement ps = con.prepareStatement("INSERT INTO pictures VALUES(?,?)");
File file = new File("C:/apache-tomcat-6.0.16/webapps/CodingDiaryExample/images/5.jpg");
FileInputStream fs = new FileInputStream(file);
ps.setInt(1,8);
ps.setBinaryStream(2,fs,fs.available());
int i = ps.executeUpdate();
Output:
When you run the application through browser it will display the following
message, once image is successfully inserted into database.
Download Source Code
|
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