之前写的文章都是关键的代码，今天整理好一个完整案例，粘贴可运行。
上传界面：upload.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 ‘upload.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<center>
<form action="upload.action" method="post" enctype="multipart/form-data">
文件：<input type="file" name="upload"/>
<input type="submit" value="上传"/>
</form>
</center>
</body>
</html>
action中的代码：FileUploadAction.java
package cn.itcast.action;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class FileUploadAction extends ActionSupport{
private String savefile;//通过注入得到上传的路径
private File upload;
private String uploadFileName;
public File getUpload() {
return upload;
}
public void setUpload(File upload) {
this.upload = upload;
}
public String getUploadFileName() {
return uploadFileName;
}
public void setUploadFileName(String uploadFileName) {
this.uploadFileName = uploadFileName;
}
public String getSavefile() {
return savefile;
}
public void setSavefile(String savefile) {
this.savefile = savefile;
}
//文件拷贝函数
//src表示源文件，dst表示目标文件
public static void copy(File src,File dst) throws Exception{
//定义一个输入流对象，使用缓冲类需要提供一个输入流对象
InputStream in = new BufferedInputStream(new FileInputStream(src));
OutputStream out = new BufferedOutputStream(new FileOutputStream(dst));
//声明一个字节数组，用来存储读入的数据
byte[] b = new byte[1024];
int length=0;
//循环读取输入流对象，把输入流读到字节数组中，返回读取的字节数长度，如果读到末尾则返回-1
while(-1!=(length=in.read(b))){
out.write(b);//讲字节数组的数据写到输出流文件中.
}
in.close(); //如果不关闭的话上传的文件将无法正常打开！！
out.close();
}
public String execute(){
String path = ServletActionContext.getServletContext().getRealPath(getSavefile()+"/");
File parfiFile = new File(path);//目录路径
if(!parfiFile.exists()){
parfiFile.mkdir();
}
File file = new File(parfiFile, getUploadFileName());//通过父文件+文件名得到一个实际的文件
if(file.getParent()!=null){
try {
copy(upload, file);//调用文件拷贝的方法
System.out.println("上传成功");
} catch (Exception e) {
// TODO Auto-generated catch block
System.out.println("上传失败");
e.printStackTrace();
}
}
return "success";
}
}
struts.xml的配置：
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.i18n.encoding" value="utf-8"></constant>
<constant name="struts.multipart.saveDir" value="F:\"></constant>
<constant name="struts.multipart.maxSize" value="10240000" />
<package name="base" extends="struts-default">
<global-results>
<result name="message">/WEB-INF/page/message.jsp</result>
</global-results>
</package>
<package name="itcast" extends="base" >
<action name="upload" class="cn.itcast.action.FileUploadAction">
<interceptor-ref name ="fileUpload">
<param name ="allowedTypes" >
image/bmp,image/png,image/gif,image/jpeg,
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,
application/vnd.ms-excel,
application/msword
</param >
<param name="maximumSize">10240000</param>
</interceptor-ref>
<interceptor-ref name ="defaultStack" />
<param name="savefile">/uploadfile</param><！--注入上传的路径-->
<result name="success">/index.jsp</result>
</action>
</package>
</struts>
时间： 2024-12-30 10:08:53