JSP—實現圖片上傳到資料庫
阿新 • • 發佈：2019-01-04
檔案目錄結構
資料庫
CREATE TABLE `user`.`images` (
`id` INT NOT NULL ,
`content` VARCHAR(100) NULL ,
`image` BLOB NULL ,
PRIMARY KEY (`id`) );
INSERT INTO `user`.`images` (`id`, `content`) VALUES (0, '無');
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <form method="post" action="image.jsp"> <input type="file" name="image" /><br /> 相片描述<input type="text" name="content" /><br /> <input type="submit" /> </form> </body> </html>
介面：
image.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="java.sql.*"%> <%@ page import="java.util.*"%> <%@ page import="java.io.*"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>圖片上傳</title> </head> <body> <jsp:useBean id="conn4" class="com.conDBMS.Conn" scope="session" /> <% request.setCharacterEncoding("utf-8"); String content = request.getParameter("content"); String filename = request.getParameter("image"); System.out.println(filename); //ServletInputStream str=request.getInputStream(); InputStream str = new FileInputStream(filename); //byte b[]=new byte[str.available()]; //str.read(b);x //ByteArrayInputStream bi=new ByteArrayInputStream(b); String sql1 = "select * from images"; Statement stmt = conn4.getConnection().createStatement(); System.out.println("連線成功"); ResultSet rs = stmt.executeQuery(sql1); rs.last(); int id = rs.getInt("id") + 1; String sql = "insert into images(id,content,image) values(" + id + ",?,?)"; PreparedStatement pstmt = conn4.getConnection().prepareStatement( sql); pstmt.setString(1, content); long l = (long) str.available(); pstmt.setBinaryStream(2, str, l); //out.print(bi.available()); try { pstmt.executeUpdate(); } catch (Exception e) { //out.print(sql); out.print(e.getMessage()); } out.println("Success,You Have Insert an Image Successfully"); %> </body> </html>
Conn.java
package com.conDBMS; import java.sql.Connection; import java.sql.DriverManager; public class Conn { final String MYSQLDBDRIVER = "com.mysql.jdbc.Driver"; final String MYSQLDBURL = "jdbc:mysql://localhost/user"; final String MYSQLDBUSER = "root"; final String MYSQLDBUSERPASS = "root"; public Connection getConnection() { try { Class.forName(MYSQLDBDRIVER); Connection con = DriverManager.getConnection(MYSQLDBURL, MYSQLDBUSER, MYSQLDBUSERPASS); return con; } catch (Exception e) { e.printStackTrace(); return null; } } }
