java上传图片

java上传图片 java servlet上传文件 上传传片 保存到据传 传取文件数 2010-12-29 11:24:00| 分传, java | 传传,servlet request import td public |字号大中小 传传 在传传的传传中～我传可能需要传片、影音等文件直接保存到据传中～然后通传传程方式据传出传将数将数 行使用。例如传出的传片据传示出～传出的传影文件播放出。将数来将来 二传制据直接保存到文件和文件中传出非常的传传。和普通的据传操作差传不大。只是用到部数从数 分流操作。例如各传传入传出流操作。所以深刻理解流操是非常重要的。 在此我借助于一个JSP的传传传例传行传解。此传例保存传传据～其中传传据包含一传片列。此列保数数个 存每名传工的照片。在此照片直接保存到据传中。首先建立传传信息表将数EmployeeInfo～表列非 常的传传 employeeId:传传传;自传增传,～号employeeName:传传姓名～age:传传年传～pic:传传传片;image传型,首先传解信息的保存。先建立一传入界面个index.jsp～其中包含一个元素～用于传用传传传传片文件。 传面代传如下;不做传多传解,, <%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%><% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>

EmployeeName:
Age:
Image:

传面传求addServlet～传取传入信息～传用并JavaBean传传据保存。数Servlet代传如下, package com.frank.action; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.frank.rule.*; public class AddServlet extends HttpServlet {/** * Constructor of the object. */ public AddServlet() { super(); } /** * Destruction of the servlet.
*/ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet.
* * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server* @param response the response send by the server to the client* @throws ServletException if an error occurred* @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String employeeName=request.getParameter("employeeName"); int age=Integer.parseInt(request.getParameter("age")); String pic=request.getParameter("pic"); EmployeeDAO employeeDAO=new EmployeeDAO(); if(employeeDAO.employeeAdd(employeeName, age, pic)) response.sendRedirect("success.jsp"); else response.sendRedirect("index.jsp"); } /** * The doPost method of the servlet.
* * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server* @param response the response send by the server to the client * @throws ServletException if an error occurred* @throws IOException if an error occurred*/ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); } /** * Initialization of the servlet.
* * @throws ServletException if an error occurs*/ public void init() throws ServletException { // Put your code here } } 此Servlet只是传传的传取传面传入的据～其中传取的数Pic传用传传传的传片路。传格传～传取文件需要传传传径 传～防止非法传片的传传～传可以根据自己的需要改善。然后个Servlet传用传传传～传取的据通传将数参 数数传入～传行据的增加。其中employeeAdd方法传传据的保存～代传如下,数 public boolean employeeAdd(String employeeName,int age,String pic){ Connection conn=null; PreparedStatement pstmt=null; FileInputStream fis=null; try{ Class.forName("net.sourceforge.jtds.jdbc.Driver"); conn=DriverManager.getConnection("jdbc:jtds:sqlserver://localhost:1433/SampleDB","sa",""); fis=new FileInputStream(pic); String strSQL="INSERT INTO employeeInfo VALUES(?,?,?)"; pstmt=conn.prepareStatement(strSQL); pstmt.setString(1, employeeName); pstmt.setInt(2, age); pstmt.setBinaryStream(3, fis, fis.available()); if(pstmt.executeUpdate()>0) return true; else return false; }catch(ClassNotFoundException ex){ ex.printStackTrace(); return false; }catch(SQLException ex){ ex.printStackTrace(); return false; }catch(IOException ex){ ex.printStackTrace(); return false; }finally{ try{ fis.close(); pstmt.close(); conn.close(); }catch(Exception ex){ } } } 注意粗部分～用传取的体pic信息;文件路,传建文件传入流传象～增加径pic字段的容通传流传象内 增加。 pstmt.setBinaryStream(3, fis, fis.available()); 三分传传,索引～流传象～流传象大小个参数参数 当增加成功传～重定向到success.jsp 运行传果如下, 增加后～传示如下代表成功, 那传如何传传传片据是否保存到了据传中,我传通传再次传索增加的据～传出增加的传片据数数呢数数并 在传面中传示出传行传传。来 首先建立一非常传传的传面个search.jsp～此传面通传文本使用传传入要传索的人传的姓名～传索人传的框基本信息;不传索传片据,～传索的人传据形成数将数JOPO传象～保存到session中～以便传面使用。 JOPO传;EmployeeObj) package com.frank.obj; public class EmployeeObj {private int employeeId;private String employeeName;private int age; public int getEmployeeId() { return employeeId; } public void setEmployeeId(int employeeId) { this.employeeId = employeeId; } public String getEmployeeName() { return employeeName; } public void setEmployeeName(String employeeName) { this.employeeName = employeeName; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } } search.jsp传面代传如下, <%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>

employeeName:

通传searchServlet传传基本信息的传索 package com.frank.action; import java.io.IOException; import java.io.PrintWriter; 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 com.frank.obj.EmployeeObj; import com.frank.rule.EmployeeDAO; public class SearchServlet extends HttpServlet {/** * Constructor of the object. */ public SearchServlet() { super(); } /** * Destruction of the servlet.
*/ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet.
* * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server* @param response the response send by the server to the client* @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String employeeName=request.getParameter("employeeName"); EmployeeDAO employeeDAO=new EmployeeDAO(); EmployeeObj employeeObj=employeeDAO.getEmployeeByName(employeeName); HttpSession session=request.getSession(); session.setAttribute("employee", employeeObj); response.sendRedirect("display.jsp"); } /** * The doPost method of the servlet.
* * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server* @param response the response send by the server to the client* @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); } /** * Initialization of the servlet.
* * @throws ServletException if an error occurs*/ public void init() throws ServletException { // Put your code here } } 此Servlet传用传传传的 getEmployeeByName方法传索人传基本信息～返回EmployeeObj传象～放入并session中～然也可以放入当request中～根据自己的需要改传。传面传索成功后重定向到display.jsp传行信息的传示;稍后传解, getEmployeeByName方法代传如下, public EmployeeObj getEmployeeByName(String employeeName){ Connection conn=null; PreparedStatement pstmt=null; ResultSet rst=null; EmployeeObj employeeObj=new EmployeeObj(); try{ Class.forName("net.sourceforge.jtds.jdbc.Driver"); conn=DriverManager.getConnection("jdbc:jtds:sqlserver://localhost:1433/SampleDB","sa",""); String strSQL="SELECT employeeId,employeeName,age FROM EmployeeInfo WHERE employeeName=?"; pstmt=conn.prepareStatement(strSQL); pstmt.setString(1, employeeName); rst=pstmt.executeQuery(); if(rst.next()){ employeeObj.setEmployeeId(rst.getInt("employeeId")); employeeObj.setEmployeeName(rst.getString("employeeName")); employeeObj.setAge(rst.getInt("age")); return employeeObj; } return null; }catch(ClassNotFoundException ex){ ex.printStackTrace(); return null; }catch(SQLException ex){ ex.printStackTrace(); return null; }finally{ try{ pstmt.close(); conn.close(); }catch(Exception ex){ } } } display.jsp传传传示传传出的传果信息～代传如下, <%@ page language="java" import="java.util.*,com.frank.obj.*" pageEncoding="ISO-8859-1"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <% EmployeeObj employeeObj=(EmployeeObj)session.getAttribute("employee");%>

EmployeeId	<%=employeeObj.getEmployeeId() %>
EmployeeName	<%=employeeObj.getEmployeeName() %>
Age	<%=employeeObj.getAge() %>
Pic

代传非常的传传～只是传传的从session 中传取保存的EmployeeObj传象～然后利用jsp表式据成达将数传信息传示到传面上。但是注意粗部分～因传我传需要保存的传片据传出～然后传示成传片。所以体将数 在此我传利用Img元素传示传片～而Src利用displayServlet的行传果传出到客传端～作传传片的传示源运。 displayServlet包含参数employeeId～用定具传示一传工的传片。来决体哪 displayServlet通传Servlet传出流～传取的传片据传送到客传端～代传如下,将数 package com.frank.action; import java.awt.image.BufferedImage; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import javax.imageio.ImageIO; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream;import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.frank.rule.EmployeeDAO; public class DisplayServlet extends HttpServlet {/** * Constructor of the object. */ public DisplayServlet() { super(); } /** * Destruction of the servlet.
*/ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet.
* * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred* @throws IOException if an error occurred*/ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("image/gif"); int employeeId=Integer.parseInt(request.getParameter("employeeId")); EmployeeDAO employeeDAO=new EmployeeDAO(); InputStream is=employeeDAO.getPicById(employeeId); int size=is.available(); byte[] image=new byte[size]; is.read(image); ServletOutputStream out=response.getOutputStream(); out.write(image); } /** * Initialization of the servlet.
* * @throws ServletException if an error occurs*/ public void init() throws ServletException { // Put your code here } } 在此～传用传传传的getPicById方法得到传片据的传入流。然后传取的传入流到数写 ServletOutputStream～传传可以在Servlet的传出端使用～即img的src中使用getPicById代传如下, public InputStream getPicById(int employeeId){ Connection conn=null; PreparedStatement pstmt=null; ResultSet rst=null; InputStream is=null; try{ Class.forName("net.sourceforge.jtds.jdbc.Driver"); conn=DriverManager.getConnection("jdbc:jtds:sqlserver://localhost:1433/SampleDB","sa",""); String strSQL="SELECT pic FROM EmployeeInfo WHERE employeeId=?"; pstmt=conn.prepareStatement(strSQL); pstmt.setInt(1, employeeId); rst=pstmt.executeQuery(); if(rst.next()){ is=rst.getBinaryStream("pic"); return is; } return null; }catch(ClassNotFoundException ex){ ex.printStackTrace(); return null; }catch(SQLException ex){ ex.printStackTrace(); return null; }finally{ try{ pstmt.close(); conn.close(); }catch(Exception ex){ } } } 注意粗部分体 好了～我传可以通传行传果传行传传～假传我传搜索名传运来称Mike的人传据～那传传传,数 点search按传～行看到传片,运将会 好了～传示出了传索传果～不但包括人传的基本据～保存到据传中的传片据也被传出传示成传片数数数并。代传只是利用jsp传传的传行传～大家可以根据自己的需要传行改传。体 传一你个JSP上传文件到ORACLE成功的例子 ==================== upload1.jsp ==================== view plain copy to clipboard print ? 1.//传传上传文件 2. <%@ page contentType= "text/html; charset=gb2312 "%> 3. 4. 5. 6. 7. 8.

9. 文件上传 , 10. 11. 12. 13. 16. 18. 19. 20. 21.

文件1: 14. 15.

文件2: 17.

22.

23. 24. 25.====================== 26.upload.jsp 27.====================== 28.//上传文件传理传面 29. <%@ page contentType= "text/html;charset=gb2312 "%> 30. <%@ page language= "java "%> 31. <%@ page import= "java.sql.* " %> 32. <%@ page import= "com.dd.database.DatabaseService "%> 33.
34. <% 35.
try 36.{ 37. String sessionID=session.getId(); 38. DatabaseService pobjDatabaseService = new DatabaseService(); 39. //传例化上传bean 40. com.jspsmart.upload.SmartUpload mySmartUpload=new com.jspsmart.upload.SmartUpload(); 41. //初始化 42. mySmartUpload.initialize(pageContext); 43. //传置上传的最大传 44. mySmartUpload.setMaxFileSize(500 * 1024*1024); 45. //上传文件 46. mySmartUpload.upload(); 47. //循传取得所有上传的文件 48. for (int i=0;i 50. { 51. //取得上传的文件 52. com.jspsmart.upload.File myFile = mySmartUpload.getFiles().getFile(i); 53. if (!myFile.isMissing()) 54. { 55. //取得文件全名 56. String myFileName=myFile.getFileName(); 57. //取得不传后传的文件名 58. String suffix=myFileName.substring(0,myFileName.lastIndexOf( '. ')); 59. //取得后传名 60. String ext= mySmartUpload.getFiles().getFile(0).getFileExt(); 61. if(ext.equals( "exe ")) 62. { 63. out.println( "上传文件不能传EXE文件 "); 64. return; 65. } 66. //取得文件的大小 67. int fileSize=myFile.getSize(); 68. //保存路 径 69. String aa=getServletContext().getRealPath( "/ ")+ "upfile\\ "; 70. String trace=aa+myFileName; 71. //取得传的 参数 72. String explain=(String)mySmartUpload.getRequest().getParameter( "text "); 73. String send=(String)mySmartUpload.getRequest().getParameter( "send "); 74. //将文件保存在服传器端 75. myFile.saveAs(trace,com.jspsmart.upload.File.SAVEAS_PHYSICAL); 76. 77. //将数上传的文件保存到据传中 78. //将文件传到流中 79. java.io.File file = new java.io.File(trace); 80. java.io.FileInputStream fis = new java.io.FileInputStream(file); 81. //打传据传 数 82. String mStrSql=null; 83. ResultSet mobjResult=null; 84. PreparedStatement mobjPrestmt=null; 85. mStrSql= "insert into H_uploadfile(markname,marksize,MarkBody,randomname,sessionid) values (?,?,?,?,?) "; 86. java.util.Random pobjRandom = new java.util.Random(new java.util.Date().getTime()); 87. long plogRandom = pobjRandom.nextLong(); 88. String mstrRandomName = String.valueOf(plogRandom); 89. //随机名 90. mstrRandomName = mstrRandomName + ". " + ext; 91. mobjPrestmt=pobjDatabaseService.getPreparedStatement(mStrSql); 92. mobjPrestmt.setString(1, suffix); 93. mobjPrestmt.setInt(2, fileSize); 94. mobjPrestmt.setBinaryStream(3,fis,(int)file.length()); 95. mobjPrestmt.setString(4,mstrRandomName); 96. mobjPrestmt.setString(5,sessionID); 97. pobjDatabaseService.setAutoCommit(); 98. mobjPrestmt.executeUpdate(); 99. pobjDatabaseService.commit(); 100. response.sendRedirect( "jlwj/uploadwenjian.jsp?id=15 "); 101. } 102. else 103. { 104. out.println(( "上传失传, ").toString()); 105. } 106. } 107.} 108.catch(Exception er) 109.{ 110. out.println( "
"); 111. out.println(er.getMessage()); 112.} 113.%> 114.====================== 115.uploadwenjian.jsp 116.====================== 117.//上传成功后跳传到传传传示出当前已上传成功的附件 118.//你要上传的是传片～那传下面传示的地方改传 就行了 119. <%@ page contentType= "text/html; charset=gb2312 "%> 120. <%@ page import= "com.dd.commons.* "%> 121. <%@ page language= "java "%> 122. <%@ page import= "java.sql.* "%> 123. <%@ page import= "java.io.* "%> 124. <%@ page import= "com.dd.database.DatabaseService "%> 125. 126. 127. 128. 129. 130. 131. 141. 142. 143. 144. 151. 152. 153. 214. 215.

145. 146. 147. 149. 150. 附加文件 148.

154. 155. 156. <% 157. try 158.{ 159. //无后传文件名 160. String mstrfileName = null; 161. //后传名 162. String mstrBackName = null; 163. int bytesum=0; 164. int byteread=0; 165. String sessionID=session.getId(); 166. DatabaseService pobjDatabaseService = new DatabaseService(); 167. Statement pobjStmt = pobjDatabaseService.createStatement(); 168. ResultSet result = pobjStmt.executeQuery( "SELECT markname,randomname,MarkBody FROM H_uploadfile where sessionid= ' "+sessionID+ " ' "); 169. if(result!=null) 170. { 171. %> 172. 173. <% 174. while(result.next()) 175. { 176. //后传名 177. mstrBackName = result.getString( "randomname "); 178. mstrfileName = result.getString( "markname "); 179. InputStream inStream=result.getBinaryStream( "MarkBody "); 180. FileOutputStream fs=new FileOutputStream(FunLibrary.getShowFilePath()+mstrBackName+ " "); 181. if(mstrBackName!=null&&mstrBackName!= " ") 182. { 183. byte[] buffer =new byte[1444]; 184. while ((byteread=inStream.read(buffer))!=-1) 185. { 186. bytesum+=byteread; 187. fs.write(buffer,0,byteread); 188. } 189.%> 190. 212. 213. 已附加的文件: 191. <% 192. String str; 193. str = " 195. str = str + "target= '_blank '> "; 196. str = str + mstrfileName; 197.//如果是要传示传片上面改传str = str + " ";就行 198. str = str + " "; 199. out.println(str + " "); 200. } 201. } 202. } 203. result.close(); 204.} 205.catch(Exception er) 206.{ 207. out.println(er.toString()); 208.} 209. 210.%> 211.

216. 217. ://hi.baidu.com/xinggede/blog/item/e3dbe036fd3dc1d4a2cc2b0b.html 文件上下的传传 传传例子 2008-01-11 11:07 传面 <%@ page language="java" pageEncoding="gbk"%><%@ taglib uri="; prefix="bean" %><%@ taglib uri="; prefix="html" %><%@ taglib uri="; prefix="logic" %><%@ taglib uri="; prefix="tiles" %>

传像:${picfail} " enctype="multipart/form-data" ">

UploadForm 传 /* * Generated by MyEclipse Struts * Template path: templates/java/JavaClass.vtl*/ package userinfo; import javax.servlet.http.HttpServletRequest;import org.apache.struts.action.ActionErrors;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionMapping;import org.apache.struts.upload.FormFile;/** * MyEclipse Struts * Creation date: 12-30-2007 * * XDoclet definition: * @struts.form name="UploadForm" */ public class UploadForm extends ActionForm {private FormFile picture; public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) { // TODO Auto-generated method stub return null; } /** * Method reset * @param mapping * @param request */ public void reset(ActionMapping mapping, HttpServletRequest request) { // TODO Auto-generated method stub} public FormFile getPicture() { return picture; } public void setPicture(FormFile picture) { this.picture = picture; } } 控制器 servlet /* * Generated by MyEclipse Struts * Template path: templates/java/JavaClass.vtl*/ package userinfo; import java.io.FileOutputStream; import java.io.InputStream; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.*; import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.Action;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionForward;import org.apache.struts.action.ActionMapping;import org.apache.struts.upload.FormFile;import DBConnection.userDAO; import Insertnotice.InsertForm; /** * MyEclipse Struts * Creation date: 12-30-2007 * * XDoclet definition: * @struts.action validate="true" */ public class UploadAction extends Action {public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { UploadForm upform=(UploadForm)form; UserinfoBean picinfo=new UserinfoBean(); String username=request.getParameter("username"); //System.out.println("登用传传传"+username); String target=""; FormFile picture=upform.getPicture(); //将照片文件保存到当前Web传用的pictures目下传传 if((picture!=null)&&(picture.getFileSize()>0)){ try{ InputStream in =picture.getInputStream();//传传传传传传取片入流 String path = request.getSession().getServletContext().getRealPath("/pictures"); String oldPictureName = picture.getFileName(); //System.out.println("传片原名:"+oldPictureName); String suffix = oldPictureName.substring(oldPictureName.lastIndexOf('.')); //System.out.println("传传片后:"+suffix); Calendar calendar=Calendar.getInstance(); String fileName =calendar.getTimeInMillis()+suffix; //System.out.println("传片更改名:"+fileName); FileOutputStream out = new FileOutputStream(path+"/"+fileName); int c; while((c=in.read()) != -1){ out.write(c); } in.close(); out.close(); //把String型的格式化传传传传传传传Date型的格式传传传传 java.sql.Date uploadtime=null; Date d = new Date(); String s = DateFormat.getDateInstance().format(d); SimpleDateFormat bartDateFormat =new SimpleDateFormat("yyyy-MM-dd"); try { java.util.Date date = bartDateFormat.parse(s); uploadtime = new java.sql.Date(date.getTime()); //System.out.println("传传格式:"+uploadtime); } catch (Exception ex) { System.out.println(ex.getMessage()); } //将照片信息保存到picinfo中 picinfo.setUsername(username); picinfo.setPicture(fileName); picinfo.setUploadtime(uploadtime); //将照片信息持久化到数据中传传 userDAO userdao=new userDAO(); try { //System.out.println("存入数据...传前"); boolean falg=userdao.uppicture(picinfo); //System.out.println("存入数据...传后"); if(falg){ target="xiugai"; }else{ request.setAttribute("picfail","传传像更新失....!"); target="xiugai"; } } catch (Exception e) { e.printStackTrace(); } }catch(Exception e){} }else{ request.setAttribute("picture","传传传传传传传上的照片"); } return mapping.findForward(target);} }