Struts1和Struts2的文件上传
1 Struts1文件上传
1.1 表单设计
<form action="upload" method="post" enctype="multipart/form-data">
请选择要上传的文件：
<input type="file" name="upload">
<input type="submit" value="上传文件">
</form>
1.2 在struts-config.xml进行如下配置
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
"http://struts.apache.org/dtds/struts-config_1_3.dtd">
<struts-config>
<form-beans >
<form-bean name="uploadForm" type="com.upload.form.UploadForm"/>
</form-beans>
<global-exceptions />
<global-forwards />
<action-mappings >
<action path="/upload"
name="uploadForm"
type="com.upload.action.UploadAction"
>
<forward name="error" path="/error.jsp"/>
</action>
</action-mappings>
<!--
可以在此处设置上传文件的大小
<controller maxFileSize="10M"/>
-->
</struts-config>
1.3 创建UploadForm类收集表单数据
package com.upload.form;
import org.apache.struts.action.ActionForm;
import org.apache.struts.upload.FormFile;
public class UploadForm extends ActionForm {
private FormFile uploadFile;
public FormFile getUploadFile() {
return uploadFile;
}
public void setUploadFile(FormFile uploadFile) {
this.uploadFile = uploadFile;
}
}
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(fileName.lastIndexOf("\\") + 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
<form action="upload" method="post" enctype="multipart/form-data">
请选择要上传的文件：
<input type="file" name="upload">
<input type="submit" value="上传文件">
</form>
2.2 在struts.xml中进行配置
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
"http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<!-- 可以在此设置上传文件的大小，如超过这个大小，则抛出异常
<constant name="struts.multipart.maxSize" value="80 * 1000"/>
-->
<package name="upload" namespace="/" extends="struts-default">
<action name="upload" class="com.upload.action.UploadAction" method="uploadFile">
<result name="success">/index.jsp</result>
</action>
</package>
</struts>
2.3 创建UploadAction类实现文件上传
package com.upload.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.commons.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) {
// 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
<form action="upload" method="post" enctype="multipart/form-data">
请选择要上传的文件：<br>
<input type="file" name="upload"><br>
<input type="file" name="upload"><br>
<input type="file" name="upload"><br>
<input type="submit" value="上传文件">
</form>
3.2 在struts.xml中进行配置
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
"http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<!-- 可以在此设置上传文件的大小，如超过这个大小，则抛出异常
<constant name="struts.multipart.maxSize" value="80 * 1000"/>
-->
<package name="upload" namespace="/" extends="struts-default">
<action name="upload" class="com.upload.action.UploadAction" method="uploadFile">
<result name="success">/index.jsp</result>
</action>
</package>
</struts>
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 org.apache.commons.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";
}
}
--------------------------------------------
补充：
BufferedReader reader = new BufferedReader(new InputStreamReader(uploadFile.getInputStream()));
List list = new ArrayList();
reader.readLine();//跳过第一行
String strLine;
while ((strLine = reader.readLine()) != null) {
String[] str = strLine.split(",");
if (str.length > 0) {
list .add(str[0]);
}
}