Struts1和Struts2的文件上传

Struts1和Struts2的文件上传

1 Struts1文件上传

1.1 表单设计

1.2 在struts-config.xml进行如下配置

"-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"

"https://www.360docs.net/doc/1c1633567.html,/dtds/struts-config_1_3.dtd">

name="uploadForm"

type="com.upload.action.UploadAction"

>

1.3 创建UploadForm类收集表单数据

1.4 创建UploadAction类实现文件上传

package com.upload.action;

import java.io.File;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.upload.FormFile;

import com.upload.form.UploadForm;

public class UploadAction extends Action {

@Override

public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)

throws Exception {

// 获取UploadForm实例

UploadForm uploadForm = (UploadForm) form;

// 获取表单中上传的文件

FormFile uploadFile = uploadForm.getUploadFile();

// 若上传的文件不为空，且文件大小<80KB

if (uploadFile != null && uploadFile.getFileSize() < 80 * 1024) { // 获取文件名

String fileName = uploadFile.getFileName();

// 编译一个文件后缀为jpg、png、gif的正则表达式

// \w+代表最少有一个任何一个字母或者数字或者下划线，最多不限制

Pattern pattern = Pattern

.compile("^(?:\\w+\\.jpg|\\w+\\.png|\\w+\\.gif)$");

Matcher matcher = pattern.matcher(fileName);

if (!matcher.matches()) {

//在此返回错误提示页面

}

// 创建新的文件名称

String newFileName = String.valueOf(System.currentTimeMillis()) + fileName.substring(https://www.360docs.net/doc/1c1633567.html,stIndexOf("\\") + 1);

// 在服务器根目录下创建images文件夹

String realpath = request.getSession().getServletContext() .getRealPath("/images");

// 在该文件夹下创建上传文件的文件对象

File file = new File(realpath, newFileName);

// 如果上传文件所在的文件夹不存在，则创建

if (!file.getParentFile().exists())

file.getParentFile().mkdir();

// 建立文件输出流

OutputStream outStream = new FileOutputStream(file);

// 第一种上传方式

InputStream inStream = uploadFile.getInputStream();

byte[] data = new byte[1024];

int len = 0;

while ((len = inStream.read(data)) != -1) {

outStream.write(data, 0, len);

}

// 第二种上传方式

// outStream.write(uploadFile.getFileData());

// 上传结束

outStream.flush();

outStream.close();

}

return null;

2 Struts2文件上传

2.1 设计表单

2.2 在struts.xml中进行配置

2.3 创建UploadAction类实现文件上传

import org.apache.struts2.ServletActionContext;

public class UploadAction {

// 得到上传的文件

private File upload;

// 得到上传文件的文件类型

private String uploadContentType;

// 得到上传文件的名称

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;

}

/**

* 文件上传

*

* @return

*/

public String uploadFile() {

if (upload != null) {

// 如果是图片文件

if ("image/pjpeg".equals(uploadContentType)

|| "image/gif".equals(uploadContentType)) {

String newFileName = String.valueOf(System.currentTimeMillis())

+ uploadFileName;

// 在服务器根目录下创建images文件夹

String realpath = ServletActionContext.getServletContext()

.getRealPath("/images");

// 在该文件夹下创建上传文件的文件对象

File destFile = new File(realpath, newFileName);

System.out.println(destFile);

// 如果上传文件所在的文件夹不存在，则创建

if (!destFile.getParentFile().exists())

destFile.getParentFile().mkdir();

try {

// 利用基本方法上传文件

InputStream inStream = new FileInputStream(upload);

OutputStream outStream = new FileOutputStream(destFile);

byte[] data = new byte[1024];

int len = 0;

while ((len = inStream.read(data)) != -1) {

outStream.write(data, 0, len);

}

// 利用Struts2中的FileUtils工具类将上传的文件拷贝到目标文件中

// FileUtils.copyFile(upload, destFile);

outStream.flush();

outStream.close();

inStream.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

return"success";

}

}

3 Struts2多文件上传

3.1 表单设计

3.2 在struts.xml中进行配置

3.3 创建UploadAction实现多文件上传

package com.upload.action;

import java.io.File;

import java.io.IOException;

import https://www.360docs.net/doc/1c1633567.html,mons.io.FileUtils;

import org.apache.struts2.ServletActionContext;

public class UploadAction {

// 得到上传的文件

private File[] upload;

// 得到上传文件的文件类型

private String[] uploadContentType;

// 得到上传文件的名称

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;

}

/**

* 文件上传

*

* @return

*/

public String uploadFile() {

if (upload != null) {

String realpath = ServletActionContext.getServletContext() .getRealPath("/images");

File saveDir = new File(realpath);

if (!saveDir.exists()) saveDir.mkdirs();

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

if ("image/pjpeg".equals(uploadContentType[i])

|| "image/gif".equals(uploadContentType[i])) {

String newFileName = String.valueOf(System

.currentTimeMillis()) + uploadFileName[i];

File destFile = new File(saveDir, newFileName);

try {

FileUtils.copyFile(upload[i], destFile);

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

return"success";

}

}