Struts1和Struts2的文件上传 -

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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

<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]);
                    }
                }

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