jsp+servlet+javabean中关于图片上传的问题

时间：2021-07-25 16:08:14

1，首先是前台的提交表单页面：

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="java.util.*" %>
<%@ page import="java.sql.*" %>

<!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=UTF-8">
<title>人员增加页面</title>
</head>
<body>
<font size="5" color="#FF0000">
   <b>文件上传 - 使用jspsmart upload组件</b>
</font><br>
<form name="addform" enctype="multipart/form-data" method="post" action="addform"  onsubmit="return validate(this);">
　<p>图片： 
　<input type="file" name="ulfile" size="20" maxlength="80"><br>
　</p>
  <p>用户：
　<input type="text" name="memberName" size="30" maxlength="50"><br>
　</p>
　<p>邮箱：
　<input type="text" name="email" size="30" maxlength="50"><br>
　</p>
　<p> 
　<input type="submit" value="上传">
　<input type="reset" value="清除">
　</p>
</form>

<script type="text/javascript">
/* 常用的正则表达式
Require : /.+/,
Id:/^[0-9]+$/;
Email : /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/,
Phone : /^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?$/,
Mobile : /^((\(\d{3}\))|(\d{3}\-))?13\d{9}|15[0123456789]\d{8}$/,
Url : /^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/,
IdCard : "this.IsIdCard(value)",
Currency : /^\d+(\.\d+)?$/,
Number : /^\d+$/,
Zip : /^[1-9]\d{5}$/,
QQ : /^[1-9]\d{4,8}$/,
Integer : /^[-\+]?\d+$/,
Double : /^\d+(\.\d+)?$/,
    MyDouble : /^[-\+]?\d+(\.\d+)?$/,
    English : /^[A-Za-z0-9]+$/,
Chinese :  /^[\u0391-\uFFE5]+$/,
Username : /^[a-z]\w{3,}$/i,
UnSafe : /^(([A-Z]*|[a-z]*|\d*|[-_\~!@#\$%\^&\*\.\(\)\[\]\{\}<>\?\\\/\'\"]*)|.{0,5})$|\s/, */


function validate(addform)
{
if(addform.memberName.value=="")
{
alert("请输入正确的名字");
return false;
}
if(!/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/.test(addform.email.value)){
alert("请输入正确的邮箱地址");
return false;
}
return true;//如果两个都判断通过就可以
} 


</script>
</body>
</html>
2，处理jsp页面传过来的数据： 

package action;


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


import model.member;






import com.jspsmart.upload.*;


import dao.addmember;
public class addform extends HttpServlet {

 /**
 * 
 */
private static final long serialVersionUID = 1L;
private ServletConfig config;
 /**
 * 初始化Servlet
 */
 final public void init(ServletConfig config) throws ServletException {
  this.config = config;
 }

 /**
 * 处理GET请求
 */
 public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  PrintWriter out = response.getWriter();
  out.println("<HTML>");
  out.println("<BODY BGCOLOR='white'>");
  out.println("<H1>jspSmartUpload : Servlet Sample</H1>");
  out.println("<HR><BR>");
  out.println("The method of the HTML form must be POST.");
  out.println("</BODY>");
  out.println("</HTML>");
 }

 /**
 * 响应POST请求
 */
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {



  PrintWriter out = response.getWriter();
  out.println("<HTML>");
  out.println("<BODY BGCOLOR='white'>");
  out.println("<H1>jspSmartUpload : Servlet Sample</H1>");
  out.println("<HR>");

  SmartUpload mySmartUpload = new SmartUpload();
  try {
   // 初始化
   mySmartUpload.initialize(config,request,response);
   // 上载
   mySmartUpload.upload();
   com.jspsmart.upload.File f1 = mySmartUpload.getFiles().getFile(0);
   String name = f1.getFileName();
   // 保存上载文件到指定目录
   //需要在webroot目录下面新建一个upload文件夹
   mySmartUpload.save("upload");
   String email=mySmartUpload.getRequest().getParameter("email"); //只能用这种方法才能接收到数据，不然用request.getparameter()取得话只能是null
   String memberName=mySmartUpload.getRequest().getParameter("memberName");  //email,memberName为form表单提交过来的
   String imageFile =  name;//图片名字
   member m = new member();
   m.setEmail(email);
   m.setImageFile(imageFile);
   m.setMemberName(memberName);
   //这边是dao层处理的增加，加入数据库的是图片的名字
   addmember a = new addmember();
   boolean q = false;
    q = a.add(m);
    if(q){
    request.getRequestDispatcher("success.jsp").forward(request,response);
    request.getSession().setAttribute("path", m.getImageFile());//把图片的名字返回给前台页面进行显示

    }else{
    response.sendRedirect("login.html");
    }
  } catch (Exception e){
   out.println("Unable to upload the file.<br>");
   out.println("Error : " + e.toString());
  }
  out.println("</BODY>");
  out.println("</HTML>");
    }
}
3，这边是数据库的增加，自己改成自己的就可以了。主要代码就这么多 

package dao;

import java.io.UnsupportedEncodingException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import util.helper;

import model.member;

public class addmember {

public boolean add(member m) {

Connection connection = helper.getConnection();
PreparedStatement preparedStatement = null;

String memberName = m.getMemberName();
String email = m.getEmail();
String file = m.getImageFile();


int sign = 0;
String sql = "INSERT into member (memberName,email,imageFile) VALUES(?,?,?)";
try {
memberName = new String(memberName.getBytes("ISO8859-1"), "UTF-8");
email = new String(email.getBytes("ISO8859-1"),"UTF-8");
file = new String(file.getBytes("ISO8859-1"),"UTF-8");

preparedStatement = connection.prepareStatement(sql);
preparedStatement.setString(1, memberName);
preparedStatement.setString(2, email);
preparedStatement.setString(3, file);
sign = preparedStatement.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
if (sign == 1) {
return true;
} else {
return false;
}
}



}



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