package upload;
import java.io.*;
import java.util.*;
import com.sun.image.codec.jpeg.*;
import java.awt.image.*;
import java.awt.*;
import java.net.*;
import java.applet.*;
import java.sql.*;
//缩略图类，
//本java类能将jpg图片文件，进行等比或非等比的大小转换。
//具体使用方法
//s_pic(大图片路径,生成小图片路径,大图片文件名,生成小图片文名,生成小图片宽度,生成小图片高度,是否等比缩放(默认为true))
public class DwindlePic {
String InputDir; // 输入图路径
String OutputDir; // 输出图路径
String InputFileName; // 输入图文件名
String OutputFileName; // 输出图文件名
int OutputWidth = 80; // 默认输出图片宽
int OutputHeight = 80; // 默认输出图片高
int rate = 0;
boolean proportion = true; // 是否等比缩放标记(默认为等比缩放)
public DwindlePic() {
// 初始化变量
InputDir = "";
OutputDir = "";
InputFileName = "";
OutputFileName = "";
OutputWidth = 80;
OutputHeight = 80;
rate = 0;
}
public boolean s_pic() {
// BufferedImage image;
// String NewFileName;
// 建立输出文件对象
File file = new File(OutputDir + OutputFileName);
FileOutputStream tempout = null;
try {
tempout = new FileOutputStream(file);
} catch (Exception ex) {
System.out.println(ex.toString());
}
Image img = null;
Toolkit tk = Toolkit.getDefaultToolkit();
Applet app = new Applet();
MediaTracker mt = new MediaTracker(app);
try {
img = tk.getImage(InputDir + InputFileName);
mt.addImage(img, 0);
mt.waitForID(0);
} catch (Exception e) {
e.printStackTrace();
}
if (img.getWidth(null) == -1) {
System.out.println(" can't read,retry!" + "<BR>");
return false;
} else {
int new_w;
int new_h;
if (this.proportion == true) { // 判断是否是等比缩放.
// 为等比缩放计算输出的图片宽度及高度
double rate1 = ((double) img.getWidth(null)) / (double) OutputWidth + 0.1;
double rate2 = ((double) img.getHeight(null)) / (double) OutputHeight + 0.1;
double rate = rate1 > rate2 ? rate1 : rate2;
new_w = (int) (((double) img.getWidth(null)) / rate);
new_h = (int) (((double) img.getHeight(null)) / rate);
} else {
new_w = OutputWidth; // 输出的图片宽度
new_h = OutputHeight; // 输出的图片高度
}
BufferedImage buffImg = new BufferedImage(new_w, new_h, BufferedImage.TYPE_INT_RGB);
Graphics g = buffImg.createGraphics();
g.setColor(Color.white);
g.fillRect(0, 0, new_w, new_h);
g.drawImage(img, 0, 0, new_w, new_h, null);
g.dispose();
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(tempout);
try {
encoder.encode(buffImg);
tempout.close();
} catch (IOException ex) {
System.out.println(ex.toString());
}
}
return true;
}
public boolean s_pic(String InputDir, String OutputDir, String InputFileName, String OutputFileName) {
// 输入图路径
this.InputDir = InputDir;
// 输出图路径
this.OutputDir = OutputDir;
// 输入图文件名
this.InputFileName = InputFileName;
// 输出图文件名
this.OutputFileName = OutputFileName;
return s_pic();
}
public boolean s_pic(String InputDir, String OutputDir, String InputFileName, String OutputFileName, int width, int height, boolean gp) {
// 输入图路径
this.InputDir = InputDir;
// 输出图路径
this.OutputDir = OutputDir;
// 输入图文件名
this.InputFileName = InputFileName;
// 输出图文件名
this.OutputFileName = OutputFileName;
// 设置图片长宽
setW_H(width, height);
// 是否是等比缩放 标记
this.proportion = gp;
return s_pic();
}
public void setInputDir(String InputDir) {
this.InputDir = InputDir;
}
public void setOutputDir(String OutputDir) {
this.OutputDir = OutputDir;
}
public void setInputFileName(String InputFileName) {
this.InputFileName = InputFileName;
}
public void setOutputFileName(String OutputFileName) {
this.OutputFileName = OutputFileName;
}
public void setOutputWidth(int OutputWidth) {
this.OutputWidth = OutputWidth;
}
public void setOutputHeight(int OutputHeight) {
this.OutputHeight = OutputHeight;
}
public void setW_H(int width, int height) {
this.OutputWidth = width;
this.OutputHeight = height;
}
public static void main(String[] a) {
// s_pic(大图片路径,生成小图片路径,大图片文件名,生成小图片文名,生成小图片宽度,生成小图片高度)
DwindlePic mypic = new DwindlePic();
System.out.println(mypic.s_pic("d:/", "d:/", "200.jpg", "bbb.jpg", 130, 80, true));
}
}
ACTION:
package upload;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
/**
* 文件上传类,图片类型，txt类型,zip类型
*
* @author Administrator
*
*/
public class Upload extends ActionSupport {
private static final long serialVersionUID = -8204063374280945416L;
private File upload;// 路径
private String uploadFileName;// 原文件名
private String uploadContentType;// 文件类型
private String imagePath;// 配置图片路径
private String image_smallPath;// 配置小图片路径
private String file_zipPath;// 配置文件路径
private String image_smalllook;
private String imagePath_look;
private String file_zip_look;
public String upload() throws Exception {
// FileUtils.copyFile(doc, target);
File image = new File(getImagePath());
if (!image.exists()) {
image.mkdir();
}
File image_small = new File(getImage_smallPath());
if (!image_small.exists()) {
image_small.mkdir();
}
File file_zip = new File(getFile_zipPath());
if (!file_zip.exists()) {
file_zip.mkdir();
}
// 得到上传文件的后缀名
String uploadName = getUploadContentType();
String lastuploadName = uploadName.substring(uploadName.indexOf("/") + 1, uploadName.length());
// 得到文件的新名字
String fileNewName = generateFileName(getUploadFileName());
if (lastuploadName.equals("jpeg")) {
System.out.println("图片类型文件");
// 创建文件
FileOutputStream fos = new FileOutputStream(getImagePath() + "/" + fileNewName);
FileInputStream fis = new FileInputStream(getUpload());
byte[] buffer = new byte[1024];
int len = 0;
while ((len = fis.read(buffer)) > 0) {
fos.write(buffer, 0, len);
}
DwindlePic mypic = new DwindlePic();
// s_pic(大图片路径,生成小图片路径,大图片文件名,生成小图片文名,生成小图片宽度,生成小图片高度)
mypic.s_pic(getImagePath() + "/", getImage_smallPath() + "/", fileNewName, fileNewName, 120, 80, true);
} else {
System.out.println("其他类型文件");
// 创建文件
FileOutputStream fos = new FileOutputStream(getFile_zipPath() + "/" + fileNewName);
FileInputStream fis = new FileInputStream(getUpload());
byte[] buffer = new byte[1024];
int len = 0;
while ((len = fis.read(buffer)) > 0) {
fos.write(buffer, 0, len);
}
}
imagePath_look = imagePath + "/" + fileNewName;
image_smalllook = image_smallPath + "/" + fileNewName;
file_zip_look = file_zipPath + "/" + fileNewName;
System.out.println(imagePath_look);
System.out.println(image_smalllook);
System.out.println(file_zip_look);
return SUCCESS;
}
/**
* 重命名文件
*
* @param fileName
* @return
*/
private String generateFileName(String fileName) {
DateFormat format = new SimpleDateFormat("yyMMddHHmmss");
String formatDate = format.format(new Date());
int random = new Random().nextInt(10000);
int position = fileName.lastIndexOf(".");
String extension = fileName.substring(position);
return formatDate + random + extension;
}
public File getUpload() {
return upload;
}
public void setUpload(File upload) {
this.upload = upload;
}
public String getUploadFileName() {
return uploadFileName;
}
public void setUploadFileName(String uploadFileName) {
this.uploadFileName = uploadFileName;
}
public String getUploadContentType() {
return uploadContentType;
}
public void setUploadContentType(String uploadContentType) {
this.uploadContentType = uploadContentType;
}
public String getImagePath() {
return ServletActionContext.getServletContext().getRealPath(imagePath);
}
public void setImagePath(String imagePath) {
this.imagePath = imagePath;
}
public String getImage_smallPath() {
return ServletActionContext.getServletContext().getRealPath(image_smallPath);
}
public void setImage_smallPath(String imageSmallPath) {
image_smallPath = imageSmallPath;
}
public String getFile_zipPath() {
return ServletActionContext.getServletContext().getRealPath(file_zipPath);
}
public void setFile_zipPath(String fileZipPath) {
file_zipPath = fileZipPath;
}
public String getImage_smalllook() {
return image_smalllook;
}
public void setImage_smalllook(String imageSmalllook) {
image_smalllook = imageSmalllook;
}
public String getImagePath_look() {
return imagePath_look;
}
public void setImagePath_look(String imagePathLook) {
imagePath_look = imagePathLook;
}
public String getFile_zip_look() {
return file_zip_look;
}
public void setFile_zip_look(String fileZipLook) {
file_zip_look = fileZipLook;
}
}
Struts.xml
<?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>
<package name="upload" namespace="/imager" extends="struts-default">
<!-- 配置处理文件上传的Action -->
<action name="upload" class="upload.UploadAction" method="upload">
<interceptor-ref name="fileUpload">
<!-- 通过动态设置allowTypes的属性来动态指定允许上传的文件类型 -->
<param name="allowTypes">
image/png,image/gif,image/jpeg,
application/zip,application/vnd.ms-word,text/plain
</param>
<param name="maximumSize">50485760</param>
</interceptor-ref>
<interceptor-ref name="defaultStack" />
<!-- 动态设置Action的属性值 -->
<param name="imagePath">/image</param>
<param name="image_smallPath">/image_small</param>
<param name="file_zipPath">/file</param>
<!-- 配置Struts2默认的视图资源 -->
<result>/success.jsp</result>
<!-- 配置该应用的input逻辑视图 -->
<result name="input"> /index.jsp</result>
</action>
<action name="download" class="upload.DownloadAction">
<result type="stream">
<param name="contentType">application/octet-stream</param>
<param name="inputName">inputStream</param>
<param name="contentDisposition">attachment;filename="${fileName}"</param>
<param name="bufferSize">4096</param>
</result>
</action>
</package>
</struts>
页面:
<%@ page language="java" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<s:form method="post" action="imager/upload" enctype="multipart/form-data">
<s:textfield name="title" label="title"></s:textfield>
<s:file name="upload" label="file"></s:file>
<s:submit></s:submit>
</s:form>
<body>
</body>
</html>
以下是经过修改的图片上传接口
工具类：
package upload;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.ServletActionContext;
public class uploadUtil {
private final static String imagePath="/image";// 配置图片路径
private final static String image_smallPath="/image_small";// 配置小图片路径
private final static String file_zipPath="/file";// 配置文件路径
public String uploadImage1(HttpServletRequest request, File getUpload, String getUploadContentType,
String getUploadFileName) throws IOException {
String getImagePath = request.getRealPath(imagePath);
String getImage_smallPath = request.getRealPath(image_smallPath);
File image = new File(getImagePath);
if (!image.exists()) {
image.mkdir();
}
File image_small = new File(getImage_smallPath);
if (!image_small.exists()) {
image_small.mkdir();
}
// 得到上传文件的后缀名
String uploadName = getUploadContentType;
String lastuploadName = uploadName.substring(uploadName.indexOf("/") + 1, uploadName.length());
// 得到文件的新名字
String fileNewName = generateFileName(getUploadFileName);
FileOutputStream fos = new FileOutputStream(getImagePath + "/" + fileNewName);
FileInputStream fis = new FileInputStream(getUpload);
byte[] buffer = new byte[1024];
int len = 0;
while ((len = fis.read(buffer)) > 0) {
fos.write(buffer, 0, len);
}
DwindlePic mypic = new DwindlePic();
// s_pic(大图片路径,生成小图片路径,大图片文件名,生成小图片文名,生成小图片宽度,生成小图片高度)
mypic.s_pic(getImagePath + "/", getImage_smallPath + "/", fileNewName, fileNewName, 120, 80, true);
return imagePath + "/" + fileNewName;
}
public String uploadfile(ServletActionContext context,File getUpload, String getUploadContentType,
String getUploadFileName) throws IOException {
String getFile_zipPath = context.getServletContext().getRealPath(file_zipPath);
File file_zip = new File(getFile_zipPath);
if (!file_zip.exists()) {
file_zip.mkdir();
}
// 得到上传文件的后缀名
String uploadName = getUploadContentType;
String lastuploadName = uploadName.substring(uploadName.indexOf("/") + 1, uploadName.length());
// 得到文件的新名字
String fileNewName = generateFileName(getUploadFileName);
// 创建文件
FileOutputStream fos = new FileOutputStream(getFile_zipPath + "/" + fileNewName);
FileInputStream fis = new FileInputStream(getUpload);
byte[] buffer = new byte[1024];
int len = 0;
while ((len = fis.read(buffer)) > 0) {
fos.write(buffer, 0, len);
}
return file_zipPath + "/" + fileNewName;
}
/**
* 重命名文件
*
* @param fileName
* @return
*/
private String generateFileName(String fileName) {
DateFormat format = new SimpleDateFormat("yyMMddHHmmss");
String formatDate = format.format(new Date());
int random = new Random().nextInt(10000);
int position = fileName.lastIndexOf(".");
String extension = fileName.substring(position);
return formatDate + random + extension;
}
}
页面：
<?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>
<package name="upload" namespace="/imager" extends="struts-default">
<!-- 配置处理文件上传的Action -->
<action name="upload" class="upload.UploadAction" method="upload">
<interceptor-ref name="fileUpload">
<!-- 通过动态设置allowTypes的属性来动态指定允许上传的文件类型 -->
<param name="allowTypes">
image/png,image/gif,image/jpeg,
application/zip,application/vnd.ms-word,text/plain
</param>
<param name="maximumSize">50485760</param>
</interceptor-ref>
<interceptor-ref name="defaultStack" />
<!-- 动态设置Action的属性值
<param name="imagePath">/image</param>
<param name="image_smallPath">/image_small</param>
<param name="file_zipPath">/file</param>
-->
<!-- 配置Struts2默认的视图资源 -->
<result>/success.jsp</result>
<!-- 配置该应用的input逻辑视图 -->
<result name="input"> /index.jsp</result>
</action>
<action name="download" class="upload.DownloadAction">
<result type="stream">
<param name="contentType">application/octet-stream</param>
<param name="inputName">inputStream</param>
<param name="contentDisposition">attachment;filename="${fileName}"</param>
<param name="bufferSize">4096</param>
</result>
</action>
</package>
</struts>
Action:
package upload;
import java.io.File;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
/** *//**
* 文件上传类,图片类型，txt类型,zip类型
*
* @author Administrator
*
*/
public class UploadAction extends ActionSupport 
{
private static final long serialVersionUID = -8204063374280945416L;
private File upload;// 路径
private String uploadFileName;// 原文件名
private String uploadContentType;// 文件类型
public String upload() throws Exception {
uploadUtil uploadutil=new uploadUtil();
HttpServletRequest request = ServletActionContext.getRequest();
uploadutil.uploadImage1(request, getUpload(), getUploadContentType(), getUploadFileName());
return SUCCESS;
}
public File getUpload() {
return upload;
}
public void setUpload(File upload) {
this.upload = upload;
}
public String getUploadFileName() {
return uploadFileName;
}
public void setUploadFileName(String uploadFileName) {
this.uploadFileName = uploadFileName;
}
public String getUploadContentType() {
return uploadContentType;
}
public void setUploadContentType(String uploadContentType) {
this.uploadContentType = uploadContentType;
}
}
因为无法得到ServletActionContext
ServletActionContext context=(ServletActionContext) ServletActionContext.getServletContext();
context.getServletContext().getRealPath(path);
所以使用
HttpServletRequest request = ServletActionContext.getRequest();
request.getRealPath(path);