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rasanga ratnayake
view data from database using drop down list
5 Answer(s)      3 years and 4 months ago
Posted in : JSP-Servlet


hi i want to view the data from database by selecting a value in a drop down list. for an example drop down list have picture element.when click it select pictures from the database. thanks


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July 18, 2011 at 12:59 PM


 <%@page import="java.sql.*"%>
<html>
<form method="post" action="picture.jsp">
      <select name='pic'>  
      <option value="none">Select</option>  
      <%
      Class.forName("com.mysql.jdbc.Driver").newInstance();  
      Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");  
      Statement stmt = con.createStatement();  
      ResultSet rs = stmt.executeQuery("Select * from image");
      while(rs.next()){
          %>
          <option value="<%=rs.getString("imagename")%>"><%=rs.getString("imagename")%></option>
           <%
      }
     %>
      </select>
      <input type="submit" value="Submit">
      </form>
      </html>


July 18, 2011 at 1:00 PM


continue......

picture.jsp:

<%@page import="java.sql.*"%>
<%@page import="java.io.*"%>
<%
String iname=request.getParameter("pic");  
 try{
     InputStream sImage;

 Class.forName("com.mysql.jdbc.Driver").newInstance();  
 Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");  
 Statement stmt = con.createStatement();  
 Statement st=con.createStatement();
      ResultSet rs=st.executeQuery("SELECT images FROM image WHERE imagename ='"+iname+"'");
      if(rs.next()){
      byte[] bytearray = new byte[1048576];
      int size=0;
      sImage = rs.getBinaryStream(1);
      response.reset();
      response.setContentType("image/jpeg");
      while((size=sImage.read(bytearray))!= -1 ){
      response.getOutputStream().write(bytearray,0,size);
   }
}
 }
 catch(Exception e){
     System.out.println(e);
 }
 %>


July 18, 2011 at 1:00 PM


continue......

picture.jsp:

<%@page import="java.sql.*"%>
<%@page import="java.io.*"%>
<%
String iname=request.getParameter("pic");  
 try{
     InputStream sImage;

 Class.forName("com.mysql.jdbc.Driver").newInstance();  
 Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");  
 Statement stmt = con.createStatement();  
 Statement st=con.createStatement();
      ResultSet rs=st.executeQuery("SELECT images FROM image WHERE imagename ='"+iname+"'");
      if(rs.next()){
      byte[] bytearray = new byte[1048576];
      int size=0;
      sImage = rs.getBinaryStream(1);
      response.reset();
      response.setContentType("image/jpeg");
      while((size=sImage.read(bytearray))!= -1 ){
      response.getOutputStream().write(bytearray,0,size);
   }
}
 }
 catch(Exception e){
     System.out.println(e);
 }
 %>


July 18, 2011 at 1:02 PM


Try the following code:

1)selectpicture.jsp:

 <%@page import="java.sql.*"%>
<html>
<form method="post" action="picture.jsp">
      <select name='pic'>  
      <option value="none">Select</option>  
      <%
      Class.forName("com.mysql.jdbc.Driver").newInstance();  
      Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");  
      Statement stmt = con.createStatement();  
      ResultSet rs = stmt.executeQuery("Select * from image");
      while(rs.next()){
          %>
          <option value="<%=rs.getString("imagename")%>"><%=rs.getString("imagename")%></option>
           <%
      }
     %>
      </select>
      <input type="submit" value="Submit">
      </form>
      </html>

2)picture.jsp:

<%@page import="java.sql.*"%>
<%@page import="java.io.*"%>
<%
String iname=request.getParameter("pic");  
 try{
     InputStream sImage;

 Class.forName("com.mysql.jdbc.Driver").newInstance();  
 Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");  
 Statement stmt = con.createStatement();  
 Statement st=con.createStatement();
      ResultSet rs=st.executeQuery("SELECT images FROM image WHERE imagename ='"+iname+"'");
      if(rs.next()){
      byte[] bytearray = new byte[1048576];
      int size=0;
      sImage = rs.getBinaryStream(1);
      response.reset();
      response.setContentType("image/jpeg");
      while((size=sImage.read(bytearray))!= -1 ){
      response.getOutputStream().write(bytearray,0,size);
   }
}
 }
 catch(Exception e){
     System.out.println(e);
 }
 %>


July 18, 2011 at 3:04 PM


thanks a lot :)



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