用Java的三大框架实现文件的上传下载，求代码啊，最好是分为action,service,serv

package cn.itcast.struts2.demo1

import java.io.File

import org.apache.commons.io.FileUtils

import org.apache.struts2.ServletActionContext

import com.opensymphony.xwork2.ActionSupport

/**

* 完成文件上传 （不是解析上传内容，因为上传内容 由fileUpload拦截器负责解析）

*

* @author seawind

*

*/

public class UploadAction extends ActionSupport {

// 接收上传内容

// <input type="file" name="upload" />

private File upload// 这里变量名 和 页面表单元素 name 属性一致

private String uploadContentType

private String uploadFileName

public void setUpload(File upload) {

this.upload = upload

}

public void setUploadContentType(String uploadContentType) {

this.uploadContentType = uploadContentType

}

public void setUploadFileName(String uploadFileName) {

this.uploadFileName = uploadFileName

}

@Override

public String execute() throws Exception {

if (upload == null) { // 通过xml配置 required校验器 完成校验

// 没有上传文件

return NONE

}

// 将上传文件 保存到服务器端

// 源文件 upload

// 目标文件

File destFile = new File(ServletActionContext.getServletContext()

.getRealPath("/upload") + "/" + uploadFileName)

// 文件复制 使用commons-io包 提供 工具类

FileUtils.copyFile(upload, destFile)

return NONE

}

}

多文件上传

package cn.itcast.struts2.demo1

import java.io.File

import org.apache.commons.io.FileUtils

import org.apache.struts2.ServletActionContext

import com.opensymphony.xwork2.ActionSupport

/**

* 支持多文件上传

*

* @author seawind

*

*/

public class MultiUploadAction extends ActionSupport {

// 接收多文件上传参数，提供数组接收就可以了

private File[] upload

private String[] uploadContentType

private String[] uploadFileName

public void setUpload(File[] upload) {

this.upload = upload

}

public void setUploadContentType(String[] uploadContentType) {

this.uploadContentType = uploadContentType

}

public void setUploadFileName(String[] uploadFileName) {

this.uploadFileName = uploadFileName

}

@Override

public String execute() throws Exception {

for (int i = 0i <upload.lengthi++) {

// 循环完成上传

File srcFile = upload[i]

String filename = uploadFileName[i]

// 定义目标文件

File destFile = new File(ServletActionContext.getServletContext()

.getRealPath("/upload" + "/" + filename))

FileUtils.copyFile(srcFile, destFile)

}

return NONE

}

}

Uploadify 是一个比较坑的东西，得用servlet, web.xml里配置 然后servlet接收

<servlet>

<servlet-name>upload</servlet-name>

<servlet-class>com.action.upload</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>upload</servlet-name>

<url-pattern>/upload/FileUploadServlet</url-pattern>

</servlet-mapping>

servlet里代码

public void doGetAndPost(HttpServletRequest request,

HttpServletResponse response){

try {

request.setCharacterEncoding("utf-8")

} catch (UnsupportedEncodingException e) {

logger.error("后台添加图片，request设置编码符失败！ {}",e.getMessage())

}

DiskFileItemFactory fac = new DiskFileItemFactory()

ServletFileUpload upload = new ServletFileUpload(fac)

upload.setHeaderEncoding("utf-8")

List fileList = null

try {

fileList = upload.parseRequest(request)

} catch (FileUploadException ex) {

ex.printStackTrace()

return

}

String imageName = null

Iterator<FileItem>it = fileList.iterator()

while (it.hasNext()) {

FileItem item = it.next()

if (!item.isFormField()) {

Random r = new Random()

int rannum = (int) (r.nextDouble() * (9999 - 1000 + 1)) + 1000

imageName=getNowStrDate() + rannum

FileBean fileBean = new FileBean()

fileBean.setFileName(item.getName())

fileBean.setFileExtension(item.getName().substring(item.getName().indexOf(".")+1))

FileBean flbn

try {

//文件服务器处理上传图片

flbn = FastDFSUtil.upload(fileBean, item.getInputStream())

} catch (IOException e) {

logger.info("添加图片，上传文件服务器失败！",e)

}

}

}

}

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