displayimage.java

来自「Displaying image from database」· Java 代码 · 共 39 行

import java.sql.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class DisplayImage 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";
		java.sql.Connection con=null;
		try{			
			Class.forName("com.mysql.jdbc.Driver").newInstance();
			con=DriverManager.getConnection(connectionURL,"root","root");			
			Statement st1=con.createStatement();
			ResultSet rs1 = st1.executeQuery("select image from pictures where id='5'");
			String imgLen="";
			if(rs1.next()){
				imgLen = rs1.getString(1);
				System.out.println(imgLen.length());
			}	
			rs1 = st1.executeQuery("select image from pictures where id='5'");
			if(rs1.next()){
				int len = imgLen.length();
				byte [] rb = new byte[len];
				InputStream readImg = rs1.getBinaryStream(1);
				int index=readImg.read(rb, 0, len);	
				System.out.println("index"+index);
				st1.close();
				response.reset();
				response.setContentType("image/jpg");
				response.getOutputStream().write(rb,0,len);
				response.getOutputStream().flush();				
			}
		}
		catch (Exception e){
			e.printStackTrace();
		}
	}
}