通过3种方式模拟多个文件上传，效果如下所示
目录结构
新建Action
第一种方式
package com.ljq.action;
import java.io.File;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
@SuppressWarnings("serial")
public class UploadAction extends ActionSupport{
private File[] image; //上传的文件
private String[] imageFileName; //文件名称
private String[] imageContentType; //文件类型
public String execute() throws Exception {
ServletActionContext.getRequest().setCharacterEncoding("UTF-8");
String realpath = ServletActionContext.getServletContext().getRealPath("/images");
System.out.println(realpath);
if (image != null) {
File savedir=new File(realpath);
if(!savedir.getParentFile().exists())
savedir.getParentFile().mkdirs();
for(int i=0;i<image.length;i++){
File savefile = new File(savedir, imageFileName[i]);
FileUtils.copyFile(image[i], savefile);
}
ActionContext.getContext().put("message", "文件上传成功");
}
return "success";
}
public File[] getImage() {
return image;
}
public void setImage(File[] image) {
this.image = image;
}
public String[] getImageContentType() {
return imageContentType;
}
public void setImageContentType(String[] imageContentType) {
this.imageContentType = imageContentType;
}
public String[] getImageFileName() {
return imageFileName;
}
public void setImageFileName(String[] imageFileName) {
this.imageFileName = imageFileName;
}
}
第二种方式
package com.ljq.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
/**
* 使用数组上传多个文件
*
* @author ljq
*
*/
@SuppressWarnings("serial")
public class UploadAction2 extends ActionSupport{
private File[] image; //上传的文件
private String[] imageFileName; //文件名称
private String[] imageContentType; //文件类型
private String savePath;
@Override
public String execute() throws Exception {
ServletActionContext.getRequest().setCharacterEncoding("UTF-8");
//取得需要上传的文件数组
File[] files = getImage();
if (files !=null && files.length > 0) {
for (int i = 0; i < files.length; i++) {
//建立上传文件的输出流, getImageFileName()[i]
System.out.println(getSavePath() + "\\" + getImageFileName()[i]);
FileOutputStream fos = new FileOutputStream(getSavePath() + "\\" + getImageFileName()[i]);
//建立上传文件的输入流
FileInputStream fis = new FileInputStream(files[i]);
byte[] buffer = new byte[1024];
int len = 0;
while ((len=fis.read(buffer))>0) {
fos.write(buffer, 0, len);
}
fos.close();
fis.close();
}
}
return SUCCESS;
}
public File[] getImage() {
return image;
}
public void setImage(File[] image) {
this.image = image;
}
public String[] getImageFileName() {
return imageFileName;
}
public void setImageFileName(String[] imageFileName) {
this.imageFileName = imageFileName;
}
public String[] getImageContentType() {
return imageContentType;
}
public void setImageContentType(String[] imageContentType) {
this.imageContentType = imageContentType;
}
/**
* 返回上传文件保存的位置
*
* @return
* @throws Exception
*/
public String getSavePath() throws Exception {
return ServletActionContext.getServletContext().getRealPath(savePath);
}
public void setSavePath(String savePath) {
this.savePath = savePath;
}
}
第三种方式
package com.ljq.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.List;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
/**
* 使用List上传多个文件
*
* @author ljq
*
*/
@SuppressWarnings("serial")
public class UploadAction3 extends ActionSupport {
private List<File> image; // 上传的文件
private List<String> imageFileName; // 文件名称
private List<String> imageContentType; // 文件类型
private String savePath;
@Override
public String execute() throws Exception {
ServletActionContext.getRequest().setCharacterEncoding("UTF-8");
// 取得需要上传的文件数组
List<File> files = getImage();
if (files != null && files.size() > 0) {
for (int i = 0; i < files.size(); i++) {
FileOutputStream fos = new FileOutputStream(getSavePath() + "\\" + getImageFileName().get(i));
FileInputStream fis = new FileInputStream(files.get(i));
byte[] buffer = new byte[1024];
int len = 0;
while ((len = fis.read(buffer)) > 0) {
fos.write(buffer, 0, len);
}
fis.close();
fos.close();
}
}
return SUCCESS;
}
public List<File> getImage() {
return image;
}
public void setImage(List<File> image) {
this.image = image;
}
public List<String> getImageFileName() {
return imageFileName;
}
public void setImageFileName(List<String> imageFileName) {
this.imageFileName = imageFileName;
}
public List<String> getImageContentType() {
return imageContentType;
}
public void setImageContentType(List<String> imageContentType) {
this.imageContentType = imageContentType;
}
/**
* 返回上传文件保存的位置
*
* @return
* @throws Exception
*/
public String getSavePath() throws Exception {
return ServletActionContext.getServletContext().getRealPath(savePath);
}
public void setSavePath(String savePath) {
this.savePath = savePath;
}
}
struts.xml配置文件
<?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>
<!-- 该属性指定需要Struts2处理的请求后缀，该属性的默认值是action，即所有匹配*.action的请求都由Struts2处理。
如果用户需要指定多个请求后缀，则多个后缀之间以英文逗号（,）隔开。 -->
<constant name="struts.action.extension" value="do" />
<!-- 设置浏览器是否缓存静态内容,默认值为true(生产环境下使用),开发阶段最好关闭 -->
<constant name="struts.serve.static.browserCache" value="false" />
<!-- 当struts的配置文件修改后,系统是否自动重新加载该文件,默认值为false(生产环境下使用),开发阶段最好打开 -->
<constant name="struts.configuration.xml.reload" value="true" />
<!-- 开发模式下使用,这样可以打印出更详细的错误信息 -->
<constant name="struts.devMode" value="true" />
<!-- 默认的视图主题 -->
<constant name="struts.ui.theme" value="simple" />
<!--<constant name="struts.objectFactory" value="spring" />-->
<!--解决乱码 -->
<constant name="struts.i18n.encoding" value="UTF-8" />
<constant name="struts.multipart.maxSize" value="10701096"/>
<package name="upload" namespace="/upload" extends="struts-default">
<action name="*_upload" class="com.ljq.action.UploadAction" method="{1}">
<result name="success">/WEB-INF/page/message.jsp</result>
</action>
</package>
<package name="upload1" namespace="/upload1" extends="struts-default">
<action name="upload1" class="com.ljq.action.UploadAction2" method="execute">
<!-- 要创建/image文件夹，否则会报找不到文件 -->
<param name="savePath">/image</param>
<result name="success">/WEB-INF/page/message.jsp</result>
</action>
</package>
<package name="upload2" namespace="/upload2" extends="struts-default">
<action name="upload2" class="com.ljq.action.UploadAction3" method="execute">
<!-- 要创建/image文件夹，否则会报找不到文件 -->
<param name="savePath">/image</param>
<result name="success">/WEB-INF/page/message.jsp</result>
</action>
</package>
</struts>
上传表单页面upload.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>文件上传</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
</head>
<body>
<!-- ${pageContext.request.contextPath}/upload/execute_upload.do -->
<!-- ${pageContext.request.contextPath}/upload1/upload1.do -->
<!-- ${pageContext.request.contextPath}/upload2/upload2.do -->
<!-- -->
<form action="${pageContext.request.contextPath}/upload2/upload2.do" enctype="multipart/form-data" method="post">
文件1:<input type="file" name="image"><br/>
文件2:<input type="file" name="image"><br/>
文件3:<input type="file" name="image"><br/>
<input type="submit" value="上传" />
</form>
</body>
</html>
显示页面message.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'message.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">
</head>
<body>
上传成功
<br/>
<s:debug></s:debug>
</body>
</html>