上传：
Action:
package com.tch.test.template.web.action;
import java.io.File;
import org.apache.commons.io.FileUtils;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
import java.io.IOException;
import com.opensymphony.xwork2.ActionSupport;
@Component("uploadFileAction")
@Scope("prototype")
public class UploadFile extends ActionSupport {
private static final long serialVersionUID = 1L;
private File myFile;
private String myFileContentType;
private String myFileFileName;
private String destPath;
public String uploadFile() {
/* Copy file to a safe location */
destPath = "e:/";
try {
System.out.println("Src File name: " + myFile);
System.out.println("Dst File name: " + myFileFileName);
File destFile = new File(destPath+myFileFileName);
FileUtils.copyFile(myFile, destFile);
} catch (IOException e) {
e.printStackTrace();
return ERROR;
}
return SUCCESS;
}
public File getMyFile() {
return myFile;
}
public void setMyFile(File myFile) {
this.myFile = myFile;
}
public String getMyFileContentType() {
return myFileContentType;
}
public void setMyFileContentType(String myFileContentType) {
this.myFileContentType = myFileContentType;
}
public String getMyFileFileName() {
return myFileFileName;
}
public void setMyFileFileName(String myFileFileName) {
this.myFileFileName = myFileFileName;
}
}
struts.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<package name="default" namespace="/upload" extends="struts-default">
<!-- 进入上传页面 -->
<action name="index">
<result>
/upload/upload.jsp
</result>
</action>
<!-- 处理文件上传 -->
<action name="uploadFile" class="uploadFileAction"
method="uploadFile">
<interceptor-ref name="fileUpload">
<param name="maximumSize">7000000</param>
</interceptor-ref>
<interceptor-ref name="defaultStack"></interceptor-ref>
<result name="success">
/upload/uploadSuccess.jsp
</result>
<result name="input">
/upload/uploadError.jsp
</result>
</action>
</package>
</struts>
struts.properties:
#国际化字符编码 struts.i18n.encoding=UTF-8 #处理请求的后缀格式 struts.action.extension=htm,action #开发模式 struts.devMode=true #是否允许动态方法调用 struts.enable.DynamicMethodInvocation=true #限制最大文件上传大小 struts.multipart.maxSize=10485760
上面限制上传文件大小的方式二选一：
一：要么通过在action中加入拦截器设置来控制：
<!-- 处理文件上传 -->
<action name="uploadFile" class="uploadFileAction"
method="uploadFile">
<interceptor-ref name="fileUpload">
<param name="maximumSize">7000000</param>
</interceptor-ref>
<interceptor-ref name="defaultStack"></interceptor-ref>
<result name="success">
/upload/uploadSuccess.jsp
</result>
<result name="input">
/upload/uploadError.jsp
</result>
</action>
二：要么通过在struts.properties中配置：
#国际化字符编码 struts.i18n.encoding=UTF-8 #处理请求的后缀格式 struts.action.extension=htm,action #开发模式 struts.devMode=true #是否允许动态方法调用 struts.enable.DynamicMethodInvocation=true #限制最大文件上传大小 struts.multipart.maxSize=10485760
上传页面 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>
<form action="upload/uploadFile.htm" method="post" enctype="multipart/form-data">
<label for="myFile">选择文件：</label>
<input type="file" name="myFile" />
<input type="submit" value="上传"/>
</form>
</body>
</html>
上传成功：uploadSuccess.jsp:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
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 'uploadSuccess.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>
文件 <s:property value="myFileFileName"/> 上传成功！
</body>
</html>
如果文件大小超过限制大小，会进入result为 input 的页面：
上传失败：uploadError.jsp:
<%@ page contentType="text/html; charset=UTF-8" %> <%@ taglib prefix="s" uri="/struts-tags" %> <html> <head> <title>File Upload Error</title> </head> <body> 上传失败. </body> </html>
多文件上传：
差别不大，首先是页面（多个相同的input file ，name相同）：
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>
<form action="upload/uploadFile.htm" method="post" enctype="multipart/form-data">
<label for="myFile">选择文件：</label>
<input type="file" name="myFile" /><br>
<input type="file" name="myFile" /><br>
<input type="submit" value="上传"/>
</form>
</body>
</html>
后台action里面接受文件的变量也使用集合：
package com.tch.test.template.web.action;
import java.io.File;
import java.io.IOException;
import java.util.List;
import org.apache.commons.io.FileUtils;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
import com.opensymphony.xwork2.ActionSupport;
@Component("uploadFileAction")
@Scope("prototype")
public class UploadFile extends ActionSupport {
private static final long serialVersionUID = 1L;
private List<File> myFile;
private List<String> myFileContentType;
private List<String> myFileFileName;
private String destPath;
public String uploadFile() {
/* Copy file to a safe location */
destPath = "e:/";
try {
// System.out.println("Src File name: " + myFile);
System.out.println("Dst File name: " + myFileFileName);
File srcFile = null;
File destFile = null;
int length = myFile.size();
for(int i=0;i<length;i++){
srcFile = myFile.get(i);
destFile = new File(destPath+myFileFileName.get(i));
FileUtils.copyFile(srcFile, destFile);
}
} catch (IOException e) {
e.printStackTrace();
return ERROR;
}
return SUCCESS;
}
public List<File> getMyFile() {
return myFile;
}
public void setMyFile(List<File> myFile) {
this.myFile = myFile;
}
public List<String> getMyFileContentType() {
return myFileContentType;
}
public void setMyFileContentType(List<String> myFileContentType) {
this.myFileContentType = myFileContentType;
}
public List<String> getMyFileFileName() {
return myFileFileName;
}
public void setMyFileFileName(List<String> myFileFileName) {
this.myFileFileName = myFileFileName;
}
}
其它的都一样。
下载：
struts.xml:
<package name="download" namespace="/" extends="struts-default">
<!-- 下载-->
<action name="download" class="uploadFileAction"
method="download">
<result type="stream">
<param name="contentType">application/octet-stream;charset=ISO8859-1</param>
<param name="inputName">myInputStream</param>
<param name="contentDisposition">attachment;filename="${downloadFileName}"</param>
<param name="bufferSize">4096</param>
</result>
</action>
</package>
inputName指定获取文件流的方式，例如myInputStream的话，就需要action里面有getMyInputStream的方法
contentDisposition指定下载文件的名字，这里通过后台的方法返回文件名，解决中文的问题：
package com.tch.test.template.web.action;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.List;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
import com.opensymphony.xwork2.ActionSupport;
@Component("uploadFileAction")
@Scope("prototype")
public class UploadFile extends ActionSupport {
private static final long serialVersionUID = 1L;
private String downloadFileName;
public String download(){
return SUCCESS;
}
public InputStream getMyInputStream()throws Exception{
return ServletActionContext.getServletContext().getResourceAsStream("/WEB-INF/中文名.doc");
}
public String getDownloadFileName() {
try {
downloadFileName = new String("中文名.doc".getBytes(), "ISO8859-1");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return downloadFileName;
}
public void setDownloadFileName(String downloadFileName) {
this.downloadFileName = downloadFileName;
}
}