jsp 图片上传功能实现原创

package com.lsl.util;

import java.awt.Image;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import javax.imageio.ImageIO;

import com.sun.image.codec.jpeg.JPEGCodec;

import com.sun.image.codec.jpeg.JPEGEncodeParam;

import com.sun.image.codec.jpeg.JPEGImageEncoder;

/**

*

* @author Administrator

* 图像处理类

*/

public class PicCompression {

/**

* 压缩图片方法

*

* @param oldFile

* 将要压缩的图片的绝对地址

* @param width

* 压缩宽

* @param height

* 压缩长

* @param quality

* 压缩清晰度建议为1.0

* @param smallIcon

* 压缩图片后,添加的扩展名

* @return

*/

public String zoom(String oldFile, int width, int height, float quality) {

if (oldFile == null) {

return null;

}

String newImage = null;

try {

File file = new File(oldFile);

if(!file.exists()) //文件不存在时

return null;

/** 对服务器上的临时文件进行处理*/

Image srcFile = ImageIO.read(file);

// 为等比缩放计算输出的图片宽度及高度

double rate1 = ((double) srcFile.getWidth(null)) / (double) width

+ 0.1;

double rate2 = ((double) srcFile.getHeight(null)) / (double) height

+ 0.1;

double rate = rate1 > rate2 ? rate1 : rate2;

int new_w = (int) (((double) srcFile.getWidth(null)) / rate);

int new_h = (int) (((double) srcFile.getHeight(null)) / rate);

/** 宽,高设定*/

BufferedImage tag = new BufferedImage(new_w, new_h,

BufferedImage.TYPE_INT_RGB);

tag.getGraphics().drawImage(srcFile, 0, 0, new_w, new_h, null);

String filePrex = oldFile.substring(0, https://www.360docs.net/doc/25908453.html,stIndexOf('.'));

/** 压缩后的文件名*/

// newImage =smallIcon + filePrex

// +oldFile.substring(filePrex.length());

newImage = filePrex

+width+"x"+height + oldFile.substring(filePrex.length());

// newImage = smallIcon;

/** 压缩之后临时存放位置*/

FileOutputStream out = new FileOutputStream(newImage);

JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);

JPEGEncodeParam jep = JPEGCodec.getDefaultJPEGEncodeParam(tag);

/** 压缩质量*/

jep.setQuality(quality, true);

encoder.encode(tag, jep);

out.close();

srcFile.flush();

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

return newImage;

}

}

package com.lsl.goods.action;

import java.io.File;

import java.io.IOException;

import java.text.SimpleDateFormat;

import java.util.Date;

import javax.annotation.Resource;

import https://www.360docs.net/doc/25908453.html,mons.io.FileUtils;

import org.apache.struts2.ServletActionContext;

import org.springframework.context.annotation.Scope;

import org.springframework.stereotype.Controller;

import com.lsl.bean.GoodsInfo;

import com.lsl.bean.Lsluser;

import com.lsl.service.GoodsInfoService;

import com.lsl.util.PicCompression;

import com.opensymphony.xwork2.ActionContext;

@Controller @Scope("prototype")

public class SetGoodsPicAction {

@Resource GoodsInfoService goodsInfoService;

private File image; // 上传的文件如果多文件就用数组形式File[] image

private String imageFileName; // 上传的文件名如果多文件就用数组形式String[] imageFileName 这里用来获取文件的后缀名

private String imageContentType; //上传文件的类系如果多文件就用数组形式String[] imageContentType

//注意文件的大小不再这里设置在struts.xml配置上传文件的大小

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;

}

//设置图片

public String setGoodsPic() throws IOException{

if(image !=null){

if(imageContentType.indexOf("image") != -1){ //检测是否为图片

String path="/Images/goodsImgs/";

String imageBasePath = ServletActionContext.getServletContext().getRealPath(path);

Lsluser lu= (Lsluser)ActionContext.getContext().getSession().get("currentUser");

String privatePath =lu.getLslId().toString();

String realPath=imageBasePath+"\\"+privatePath; //硬盘的目录这里第一个\是转译符意思是第二个\是有效字符

SimpleDateFormat dateFormat =new SimpleDateFormat("yyyyMMddHHmmssSSS");

String imageName=dateFormat.format(new Date()); //设置文件名以时间命名

String

suffixName=imageFileName.substring(https://www.360docs.net/doc/25908453.html,stIndexOf(".")).toLowerCase();//获取文件的后缀名

File saveFile= new File(new File(realPath),imageName+suffixName);

if(!saveFile.getParentFile().exists()) saveFile.getParentFile().mkdirs();//如果不存在绝对目录那就创建改目录

FileUtils.copyFile(image, saveFile); //保存原图成功

PicCompression pc = new PicCompression(); //处理图片的类

int w=200;

int h=250;

pc.zoom(new

File(realPath).toString()+"\\"+imageName+suffixName,w,h,1); //生成缩略图命名规则就是在原图的名字后面加上宽度x长度

String bigPicRelativePath = path + privatePath+"/"+imageName+suffixName; //实图的相对路径用于存放进数据库

String smallPicRelativePath = path + privatePath+"/"+imageName+w+"x"+h+suffixName; //缩略图的相对路径用于存放进数据库

GoodsInfo

addingGoods=(GoodsInfo)ActionContext.getContext().getSession().get("addingGoods");

addingGoods.setImgUrl(bigPicRelativePath);

addingGoods.setSmallImgUrl(smallPicRelativePath);

goodsInfoService.update(addingGoods);

ActionContext.getContext().getSession().put("setPicRestul", "图片上传成功");

}

}

return "setPicSuccess";

}

}

AnyQuestion --- Qq:16895920