Javaweb文件上传到sqlServer数据库

jsp页面：

这里开始你的描述：

</textarea>
<br/>

<input type="submit" value="提交">

</form>

Servlet页面（Upload.java）：

import java.io.File;

import java.io.IOException;

import java.io.PrintWriter;

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.SQLException;

import java.io.FileOutputStream;

import java.io.InputStream;

import org.apache.commons.fileupload.FileItem;

import org.apache.commons.fileupload.FileUploadException;

import org.apache.commons.fileupload.disk.DiskFileItemFactory;

importorg.apache.commons.fileupload.servlet.ServletFileUpload;

import org.apache.commons.io.FilenameUtils;

import java.util.List;

import java.util.UUID;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import model.DatabaseBean;

publicclass Upload extends HttpServlet{

privatestaticfinallongserialVersionUID = 1L;

protectedvoid doGet(HttpServletRequest request, HttpServletResponseresponse)

throws ServletException, IOException {

response.setContentType("text/html;charset=UTF-8");

request.setCharacterEncoding("utf-8");

PrintWriter out=response.getWriter();

String sql="insert into person(username,password,img) values(?,?,?)";

String driverClass="com.microsoft.sqlserver.jdbc.SQLServerDriver";
String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=Sweet";
String username="sa";
String password="123456";
Class.forName(driverClass);
Connection conn=DriverManager.getConnection(url, username, password);

PreparedStatement pstmt = conn.prepareStatement(sql);

try{

DiskFileItemFactory diskFactory = new DiskFileItemFactory(); //创建FileItem 对象的工厂

ServletFileUpload upload = new ServletFileUpload(diskFactory);//处理上传的文件数据，并将表单中每个输入项封装成一个FileItem 对象中

diskFactory.setRepository(new File("f:\\"));

upload.setHeaderEncoding("UTF-8");//设置编码格式

// 设置允许上传的最大文件大小 4M

upload.setSizeMax(4 * 1024 *1024);

List<FileItem> fileItems =upload.parseRequest(request);//解析请求，将表单中每个输入项封装成一个FileItem对象

for(intfi=0;fi<fileItems.size();fi++){ //判断输入的类型是普通输入项还是文件

if (!fileItems.get(fi).isFormField()){ //是文件

InputStream in =fileItems.get(fi).getInputStream();

StringdirectoryRealPath=request.getSession().getServletContext().getRealPath("/")+"upload/";

System.out.println(directoryRealPath);

File storeDirectory = new File(directoryRealPath);// 即代表文件又代表目录

if (!storeDirectory.exists()) {

storeDirectory.mkdirs();// 创建一个指定的目录

}

// 得到上传的名子

String filename =fileItems.get(fi).getName();

if (filename != null) {

filename = FilenameUtils.getName(filename);// 获取文件名称

}

// 解决文件同名的问题

filename = UUID.randomUUID() + "_" + filename;

// 上传文件，自动删除临时文件

File file = new File(storeDirectory, File.separator + filename); // 绝对目录/日期目录/文件名

FileOutputStream fo = new FileOutputStream(file);

int len = 0;

byte[] b = newbyte[1024];

while ((len = in.read(b)) != -1) {

fo.write(b, 0, len);

}

//关闭流

fo.close();

in.close();

pstmt.setString(3,filename );

fileItems.get(fi).delete();

} //删除文件不留

else{ //普通输入项

Strings=fileItems.get(fi).getString("utf-8");

switch(fi){

case0:pstmt.setString(1,s ); break;

case1:pstmt.setString(2,s );break;

default:out.println("Error");

}

pstmt.executeUpdate();

out.print("<script charset='UTF-8'language='javascript' type='text/javascript'>" +

" alert('上传成功');window.location.href='upload.jsp'</script>");

} catch(FileUploadException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}catch (Exception e) {

e.printStackTrace();

}finally{

DatabaseBean.closeStmt(pstmt);

DatabaseBean.closeConn(conn);

}

protectedvoid doPost(HttpServletRequest request, HttpServletResponseresponse)

throws ServletException, IOException {

doGet(request, response);

}