Get image history from database as byte variable using JDBC.Encode the binary image data into a Base64 string representation.Display the symbolic representation in a JSP page containing an tag with an image source that is a base64 string.
In this post, I was able to help you very well to display the images served by the database servlet. Usually the image information is stored in the database in the right column of the BLOB data, you only need a byte[] to get the data and write as a response in terms of access. In the section above, I provided a small database for this tutorial.
To display an image, your family needs a servlet, and the URL might look like this:
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Make sure you have a good working knowledge of JDBC and Servlet. Otherwise, you can visit:
JDBC:
Servlets:
Create a PERSON table( IDENTIFICATION NUMBER (19) is probably different from zero, VARCHAR2(50) NAME is not null, IMAGE_DATA BLOB is not null, IMAGE_FILE_NAME VARCHAR2(30) not null);fromchange cubic FACE Add the master key (ID) of the PERSON_PK constraint;
Create a PERSON table(ID NUMERIC(19,0) not zero,VARCHAR(50) NAME is not null,IMAGE_DATA IMAGE is non-zero,IMAGE_FILE_NAME VARCHAR(30) not null);Edit PERSON tableAdd a primary key (ID) constraint to PERSON_PK; create on board HUMAN(Nonzero BIGINT ID,NAME VARCHAR(50) n is not null,IMAGE_DATA LONGBLOB is non-zero,IMAGE_FILE_NAME VARCHAR(30) not just null);Edit PERSON tableAdd initial key constraint (ID) to PERSON_PK;
2- Displaying A Database Image Using A Servlet
http://localhost:8080/ServletExamples/image?id=2
http://localhost:8080/ServletExamples/image?id=3
package org.o7planning.servletexamples.model;government employee ID long top secret; own channel name; distinguishing byte[] imageData; n single line imageFileName; civilian () public person(long person, string name, string imageFileName, byte[] imageData) this.id = id; this.name = name; image data this.imageData; = this.imageFileName = imageFileName; Long getId() manifest Idereturn identifier; public void setId(long id) this id.id; equals many getName() lines produce a name; public void setName(string name) this.name = name; public yard byte[] getImageData() rear image data; public void setImageData(byte[] imageData) this.imageData = image data; big public string getImageFileName() come image filename; public void setImageFileName(String imageFileName) this.imageFileName = imageFileName; organization
package.o7planning.servletexamples;import java.io.IOException;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.o7planning.servletexamples.model.Person;import org.o7planning.tutorial.jdbc.ConnectionUtils;// /image?id=123@WebServlet(urlPatterns is “/image”)public class DisplayImageServlet extended HttpServlet { private static longer serialVersionUID = 1L; average male or female DisplayImageServlet() Zdorow(); Private getImageInTable(Connection conn, Long id) throws SQLException String sql=”Select p.Id,p.Name,p.Image_Data,p.Image_File_Name”// + “person versus p, where p.= id?”; PreparedStatement pstm = connection prepareStatement(sql); pstm.setLong(1, identifier); ResultSet rs implies pstm.executeQuery(); obviously if (rs.next()) Name String = rs.getString(“Name”); byte[] imageData = rs.getBytes(“Image_Data”); String imageFileName = rs.getString(“Image_File_Name”); return a new person (ID, full name, image filename, image data); returns null; @Crush protected void doGet (requires HttpServletRequest, HttpServletResponse response) ServletException wrapper, IOException { conn connection is empty; Try with { // Get the database connection. // (see tutorial for details) jdbc conn = ConnectionUtils.getMyConnection(); long identifier = null; To attempt = Long.parseLong(request.getParameter(“id”)); break (except e) Person person = getImageInTable(connection, id); if (people == null) // Records not found, jump to default image immediately. response.sendRedirect(request.getContextPath() + “/images/noimage.jpg”); come back to; Download this software and fix your PC in minutes.
