showImage.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <%@page import="java.sql.*" %> <%@page import="java.util.*" %> <%@page import="java.text.*" %> <%@page import="java.io.*" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'showImage.jsp' starting page</title> </head> <body> <% String url="jdbc:mysql://localhost:3306/student?useSSL=true"; String useName="root"; String password="2277092"; String sql="select binfile from bindata where name='01'"; try{ Class.forName("com.mysql.jdbc.Driver"); } catch(Exception e){ out.print(e); } Connection conn=null;//连接数据库 Statement stmt=null;//执行SQL语句 ResultSet rs=null;//取得结果集 conn=DriverManager.getConnection(url,useName,password); try{ stmt=conn.createStatement(); rs=stmt.executeQuery(sql); }catch(SQLException e){ out.print(e); } try{ while(rs.next()){ response.setContentType("image/jpeg");//设置返回给客户端的内容的类型 //给客户端提供一个输出二进制的输出流 ServletOutputStream sout=response.getOutputStream(); InputStream in=rs.getBinaryStream(1); byte b[]=new byte[0x7a120]; for(int i=in.read(b);i!=-1;){ sout.write(b); in.read(); } sout.flush(); sout.close(); } out.clear(); out=pageContext.pushBody(); } catch(Exception e){ out.print(e); } %> </body> </html>
MySQL上传图片类型设置
