iamhere,always.
---幸運皮
以前的時候,好像做過任意上傳多個文件的.哦,不對,應該是這樣說,最最初,是上傳固定的一個文件,用的struts2和hibernate,後來,做了固定上傳多個的,再後來,做了不固定個數上傳的,現在總結起來有這麼幾種情況:
<input type="file" name="upload"/>
看上面的文件代碼,我們分這麼幾種上傳的情況:
一,上傳一個文件,當然,這樣的話,name值只有一個
二,上傳多個.上傳多個其實包含了固定個數上傳和不定個數的上傳,一般來說,不定個數上傳,那麼,name的值一般都是相同的,在後臺接受的時候,用一個數組接受.而對於上傳固定的多個文件來說,就要遇到name值不同的情況.
接下來要討論的問題就是上傳固定多個文件,並且name值不相同的情況.
先看一下項目的結構吧:
步驟一:創建數據庫表:
CREATE TABLE uploadfile (
id INT(32) NOT NULL PRIMARY KEY AUTO_INCREMENT,
path VARCHAR(255)
);步驟二:新建一個web project,引入struts2和hibernate(這些不細說)
步驟三:看一下index.jsp文件,就是文件選擇並提交的頁面:
<%@ 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>upload test</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 id="form1" name="form1" method="post" enctype="multipart/form-data" action="upload.action">
<table bgcolor="#999999" width="700" border="0" cellspacing="1" cellpadding="0">
<tr>
<td height="35" align="left" bgcolor="#BBBBBB">
文件一:<input type="file" name="upload1"/>
</td>
</tr>
<tr>
<td height="35" align="left" bgcolor="#BBBBBB">
文件二:<input type="file" name="upload2"/>
</td>
</tr>
<tr>
<td height="35" align="left" bgcolor="#BBBBBB">
<input type="submit" name="button" id="button" value="提交" />
</td>
</tr>
</table>
</form>
</body>
</html>
步驟四:配置struts.xml文件:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package namespace="/" name="" extends="struts-default">
<action name="upload" class="com.xingyunpi.action.UploadFile">
<param name="savePath1">/upload1</param>
<param name="savePath2">/upload2</param>
<result name="success">suc.jsp</result>
</action>
</package>
</struts>
步驟五:用hibernate引入對數據庫的操作:EntityDao.java
package com.hibernate.data;
import org.hibernate.Session;
import org.hibernate.Transaction;
import com.hibernate.session.HibernateSessionFactory;
public class EntityDao {
//獲取session
public static Session getSession(){
return HibernateSessionFactory.getSession();
}
public static void save(Uploadfile obj){
Session se = getSession();
Transaction tran = se.beginTransaction();//開始事物
getSession().saveOrUpdate(obj);//執行
tran.commit();//提交
se.close();
}
}步驟六:最主要的是action部分:
package com.xingyunpi.action;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.util.Date;
import org.apache.struts2.ServletActionContext;
import com.hibernate.data.EntityDao;
import com.hibernate.data.Uploadfile;
import com.opensymphony.xwork2.ActionSupport;
public class UploadFile extends ActionSupport {
private java.io.File upload1; // 客戶端文件域
private String upload1ContentType; // 上傳的文件類型
private String upload1FileName; // 上傳的文件名
private java.io.File upload2; // 客戶端文件域
private String upload2ContentType; // 上傳的文件類型
private String upload2FileName; // 上傳的文件名
String savePath1;
String savePath2;
public String execute(){
String fileName = "";//輸出流
if(upload1!=null){
String fileType = upload1FileName.substring(upload1FileName.lastIndexOf("."));
fileName = (new Date().getTime()+0+1)+ fileType;
//文件上傳
FileOutputStream fos;
try {
//上傳到upload文件夾下
fos = new FileOutputStream(ServletActionContext.getServletContext().getRealPath("upload") + "\\" + fileName);
FileInputStream fis = new FileInputStream(upload1);
byte[] buffer = new byte[1024];
int len = 0;
while ((len = fis.read(buffer)) > 0)
{
fos.write(buffer , 0 , len);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
//存儲
Uploadfile uf = new Uploadfile();
uf.setPath("upload/" + fileName);
EntityDao.save(uf);
}//上面是上傳第一個圖片
if(upload2!=null ){//文件
String fileType = new String();
fileType = upload2FileName.substring(upload2FileName.lastIndexOf("."));
fileName = (new Date().getTime()+1+1)+ fileType;
// 文件上傳
FileOutputStream fos;
try {
//上傳到upload文件夾下
fos = new FileOutputStream(ServletActionContext.getServletContext().getRealPath("upload") + "\\" + fileName);
FileInputStream fis = new FileInputStream(upload2);
byte[] buffer = new byte[1024];
int len = 0;
while ((len = fis.read(buffer)) > 0)
{
fos.write(buffer , 0 , len);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
//存儲
Uploadfile uf = new Uploadfile();
uf.setPath("upload/" + fileName);
EntityDao.save(uf);
}//上傳第二個圖片
return SUCCESS;
}
String getFilename(String name){
/**
* 獲取文件名的後綴
* @return String
*/
int i = name.lastIndexOf(".")+1;
return name.substring(i,name.length());
}
public String getSavePath1() {
return savePath1;
}
public void setSavePath1(String savePath1) {
this.savePath1 = savePath1;
}
public String getSavePath2() {
return savePath2;
}
public void setSavePath2(String savePath2) {
this.savePath2 = savePath2;
}
public java.io.File getUpload1() {
return upload1;
}
public void setUpload1(java.io.File upload1) {
this.upload1 = upload1;
}
public String getUpload1ContentType() {
return upload1ContentType;
}
public void setUpload1ContentType(String upload1ContentType) {
this.upload1ContentType = upload1ContentType;
}
public String getUpload1FileName() {
return upload1FileName;
}
public void setUpload1FileName(String upload1FileName) {
this.upload1FileName = upload1FileName;
}
public java.io.File getUpload2() {
return upload2;
}
public void setUpload2(java.io.File upload2) {
this.upload2 = upload2;
}
public String getUpload2ContentType() {
return upload2ContentType;
}
public void setUpload2ContentType(String upload2ContentType) {
this.upload2ContentType = upload2ContentType;
}
public String getUpload2FileName() {
return upload2FileName;
}
public void setUpload2FileName(String upload2FileName) {
this.upload2FileName = upload2FileName;
}
}
由此需要注意的是,jsp裏面配置的name和struts.xml中傳遞的param的name再加上action接受的"
private java.io.File upload1; // 客戶端文件域
"的命名是一樣的.
這樣,就能用struts2把不同name的文件名上傳到後臺
最後加上下載整個項目的程序:
