struts2多文件上传（修改名称、压缩图片、删除图片）
一下代码已经测试过，放心使用：
----------------upload.jsp-------------------------
<%@ page language="java" contentType="text/html; charset=GBK"%>
<%@taglib prefix="s" uri="/struts-tags"%>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK" />
<title>使用数组上传多个文件</title>
</head>
<body>
<s:fielderror/>
<form action="upload.action" method="post" enctype="multipart/form-data">
文件标题：<input type="text" name="title" /><br>
选择第一个文件：<input type="file" name="upload" /><br>
选择第二个文件：<input type="file" name="upload" /><br>
选择第三个文件：<input type="file" name="upload" /><br>
<input value="上传" type="submit" />
</form>
</body>
</html>
--------------------succ.jsp-------------------
<%@ page language="java" contentType="text/html; charset=GBK"%>
<%@taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
<title>上传成功</title>
</head>
<body>
上传成功!<br>
</body>
</html>
包名称：lee
类名称：UploadAction.java
-------------------------------------------------
package lee;
import com.opensymphony.xwork2.Action;
import org.apache.struts2.ServletActionContext;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.UUID;
import javax.imageio.ImageIO;
import com.opensymphony.xwork2.ActionSupport;
public class UploadAction extends ActionSupport
{
private String title;
private File[] upload;
private String[] uploadContentType;
private String[] uploadFileName;
//接受依赖注入的属性
private String savePath;
//接受依赖注入的方法
public void setSavePath(String value)
{
this.savePath = value;
}
private String getSavePath() throws Exception
{
return ServletActionContext.getRequest().getRealPath(savePath);
}
public void setTitle(String title) {
this.title = title;
}
public void setUpload(File[] upload) {
this.upload = upload;
}
public void setUploadContentType(String[] uploadContentType) {
this.uploadContentType = uploadContentType;
}
public void setUploadFileName(String[] uploadFileName) {
this.uploadFileName = uploadFileName;
}
public String getTitle() {
return (this.title);
}
public File[] getUpload() {
return (this.upload);
}
public String[] getUploadContentType() {
return (this.uploadContentType);
}
public String[] getUploadFileName() {
return (this.uploadFileName);
}
@Override
public String execute() throws Exception
{
File[] files = getUpload();
for (int i = 0 ; i < files.length ; i++)
{
System.out.println("开始上传图片! ");
//以服务器的文件保存地址和原文件名建立上传文件输出流
System.out.println("第个"+(i+1)+"图片的大小为:"+getUpload()[i].length());
FileOutputStream fos = new FileOutputStream(getSavePath() + "\\" + getUploadFileName()[i]);
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);
}
System.out.println("上传完毕！ ");
fos.close();
fis.close();
String impname = UploadAction.cutImage(getSavePath() + "\\" + getUploadFileName()[i],20, 20);
//String appPath = ServletActionContext.getRequest().getRealPath("\\"+getSavePath());
//System.out.println("appPath=========================="+appPath);
String oldPath = getSavePath() + "\\" + getUploadFileName()[i];
System.out.println(oldPath);
File file = new File(oldPath);
if (file.exists()) {
if(file.delete()){
System.out.println("成功删除！");
}else{
System.out.println("删除失败！");
}
} else {
System.out.println("抱歉不存在! ");
}
String[] aa = {oldPath};
}
return SUCCESS;
}
// 图片处理
public static String cutImage(String srcPath, int width, int height)
throws IOException {
File srcFile = new File(srcPath);
BufferedImage image = ImageIO.read(srcFile);
int srcWidth = image.getWidth(null);
int srcHeight = image.getHeight(null);
int newWidth = 0, newHeight = 0;
int x = 0, y = 0;
double scale_w = (double) width / srcWidth;
double scale_h = (double) height / srcHeight;
System.out.println("scale_w=" + scale_w + ",scale_h=" + scale_h);
// 按原比例缩放图片
if (scale_w < scale_h) {
newHeight = height;
newWidth = (int) (srcWidth * scale_h);
x = (newWidth - width) / 2;
} else {
newHeight = (int) (srcHeight * scale_w);
newWidth = width;
y = (newHeight - height) / 2;
}
BufferedImage newImage = new BufferedImage(newWidth, newHeight,
BufferedImage.TYPE_INT_RGB);
newImage.getGraphics().drawImage(
image
.getScaledInstance(newWidth, newHeight,
Image.SCALE_SMOOTH), 0, 0, null);
// 保存缩放后的图片
String fileSufix = srcFile.getName().substring(
srcFile.getName().lastIndexOf(".") + 1);
String aa = UUID.randomUUID().toString() + "." + fileSufix;
File destFile = new File(srcFile.getParent(), aa);
// ImageIO.write(newImage, fileSufix, destFile);
// 保存裁剪后的图片
System.out.println("fileSufix====" + fileSufix);
System.out.println("image=====" + srcPath + aa);
ImageIO.write(newImage.getSubimage(x, y, width, height), fileSufix,
destFile);
return aa;
}
}
-------------------------struts2配置文件------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.custom.i18n.resources" value="globalMessages"/>
<constant name="struts.i18n.encoding" value="GBK"/>
<package name="upload" extends="struts-default">
<action name="upload" class="lee.UploadAction">
<interceptor-ref name="fileUpload">
<param name="allowedTypes">image/bmp,image/png,image/gif,image/jpeg,image/pjpeg</param>
</interceptor-ref>
<interceptor-ref name="defaultStack"/>
<param name="savePath">/upload</param>
<result name="input">/upload.jsp</result>
<result>/succ.jsp</result>
</action>
</package>
</struts>
------------------------WEB.xml配置-------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<filter>
<filter-name>struts</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>struts</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter>
<filter-name> struts-cleanup </filter-name>
<filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class>
</filter>
<filter-mapping>
<filter-name>struts-cleanup</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>upload.jsp</welcome-file>
</welcome-file-list>
</web-app>