jsp完整图片上传

最新推荐文章于 2022-11-30 22:05:29 发布

tree3170

最新推荐文章于 2022-11-30 22:05:29 发布

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CC 4.0 BY-SA版权

文章标签： jsp string stylesheet import exception sqlserver

本文链接：https://blog.youkuaiyun.com/tree3170/article/details/7683789

本文介绍了一个使用JSP实现文件上传功能，并将文件信息存储到数据库中的实例。通过整合DBConn2类进行数据库连接，以及DiskFileUpload类进行文件上传处理，实现了前端文件上传与后端数据库存储的无缝对接。

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数据库设计如图：
DBConn2.java

package com.db;

import java.sql.Connection;
import java.sql.DriverManager;

public class DBConn2 {

String url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=test";
String user="sa";
String pwd="123456";
Connection conn=null;
public Connection get()
{
try {
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
    conn=DriverManager.getConnection(url,user,pwd);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
}
}

load.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 'load.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">


</head>

<body>
    <form action="fileupload.jsp" enctype="multipart/form-data" method="post">
    <input type="file" name="filename"/>
    <input type="submit" value="上传"/>
    </form>
</body>
</html>

fileupload.jsp

<%@ page language="java" import="java.util.*,com.db.*" pageEncoding="utf-8"%>
<%@ page import="java.sql.*" %>
<%@page import="org.apache.commons.fileupload.disk.DiskFileItem"%>
<%@page import="org.apache.commons.fileupload.DiskFileUpload"%>
<%@page import="org.apache.commons.fileupload.FileItem"%>
<%@page import="java.io.InputStream"%>
<%
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 'fileupload.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">


</head>

<body>
    <%
    PreparedStatement ps=null;
    DBConn2 db=new DBConn2();
    Connection conn=db.get();
try{
    String sql="insert into test.dbo.file_tbl(filename,filecontent,createdate) values(?,?,GETDATE())";

    DiskFileUpload fu=new DiskFileUpload();
    fu.setHeaderEncoding("utf-8");
    fu.setSizeMax(1024*1024*20);
    fu.setSizeThreshold(4096);//设置缓冲区4k
    fu.setRepositoryPath("c:\\uploade");

    List file=fu.parseRequest(request);
    Iterator it=file.iterator();
    while(it.hasNext()){
    FileItem fi=(FileItem)it.next();
    if(!fi.isFormField()){
    String file1=fi.getName();
    String filename=file1.substring(file1.lastIndexOf("\\")+1);
    String filecontent=fi.getContentType();
    int filesize=(int)fi.getSize();

    out.write("文件名"+filename+"<br>");
    out.write("文件类型："+filecontent+"<br>");
    out.write("文件大小:"+filesize+"<br>");

    ps=conn.prepareStatement(sql);
    InputStream is=fi.getInputStream();
    System.out.println(filesize);
    ps.setString(1,filename);

    ps.setBinaryStream(2,is,filesize);
    ps.executeUpdate();
    is.close();
    out.println("文件上传成功！！！");
}
    }
    }catch(Exception e){
    e.printStackTrace();
    }finally{
    ps.close();
    conn.close();
    }


     %>
</body>
</html>