struts2之多个文件上传

struts2之多个文件上传

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 >

文章转载路径：http://www.cnblogs.com/linjiqin/archive/2011/03/21/1990688.html