文件批量上传功能

使用struts2实现文件的上传功能：

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;
}

}

jsp页面：

<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>