jpeghandle.java

完成的文件上传组建,能够上传图片,并实现图片的压缩和切割

/*
 * 创建日期 2004-10-18
 *
 * TODO 
 */
package com.ntsky.file;

import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
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.JPEGImageEncoder;

/**
 * @author Administrator
 * 图像处理
 * TODO
 */
public class JPEGHandle {
    
    private JPEG jpeg ;
    private File file ;
    private String contextPath;
    
    public JPEGHandle(File file,JPEG jpeg,String contextPath){
        this.file = file;
        this.jpeg = jpeg;
        this.contextPath = contextPath;
    }
    
    
    protected void encoderPic(){
       Image src;                     //构造Image对象
        try {
            src = ImageIO.read(file);
            int width=src.getWidth(null); //得到源图宽
    		int height=src.getHeight(null);  //得到源图长
    		
    		int tempWidth = jpeg.getPicWidth();
    		int tempHeight = jpeg.getPicHeight();
    		
    		// 当图片高度和宽度确定的情况下
    		/*if((tempWeidth!=0)&&(tempHeight==0)){
    		    tempHeight = 
    		}*/
    		// 生成图片
    		builderPic(drawPic(src,tempWidth,tempHeight));
    		
        } catch (IOException e) {
            // TODO 自动生成 catch 块
            e.printStackTrace();
        }
    }     
    
    /**
     * 绘制图片框架
     * @param src
     * @param weigth
     * @param height
     * @return
     */
    private BufferedImage drawPic(Image src,int weigth,int height){
		BufferedImage bufferedImage = new BufferedImage(weigth,height,BufferedImage.TYPE_INT_RGB);
		bufferedImage.getGraphics().drawImage(src,0,0,weigth,height,null);       //绘制缩小后的图
		return bufferedImage;
    }
    
 
    
    /**
     * 生成图片的各种方案
     * 宽度
     * @param tag
     */
    /*public String getWidth(int width,int height,int tempHeight){
        
    }*/
    
    /**
     * 高度
     * @param tag
     */
    //public String getWidth(){
        
    //}   
    
    /**
     * 生成图片部分
     * @param tag
     */
    private void builderPic(BufferedImage BufferedImage){
		FileOutputStream out;          //输出到文件流
        try {            
            String picPath = jpeg.getPicPath(); // 图片路径
            String picName = jpeg.getPicName(); // 图片名
            
            // 文件的路径
            String filePath = file.getPath();
            filePath = FileUtil.htmlEncode(filePath);
            System.out.println("filePath = " + filePath);
            
            //文件名
            String fileName = file.getName();
            int tempLength = fileName.indexOf(".");  //文件名到“.”分割
            String picSuffix = fileName.substring(tempLength);
            
            String outPicPath = "";           
            // 图片路径已知的情况            
            if(picPath == null){
                String tempPath = filePath.substring(0,filePath.lastIndexOf("/"))+"/"; 
                // 文件名未知的情况
                if(picName == null){  
                    outPicPath = tempPath+fileName.substring(0,tempLength)+"_small"+picSuffix;
                    //FileUtil.makeFile(outPicPath);
                }
                else{
                    // 有文件名的情况
                    outPicPath = tempPath+picName+picSuffix;
                   // FileUtil.makeFile(outPicPath);            
                }
            }            
            else{
                // 设置small图片路径的配置
                // 目录的创建
                FileUtil.makeDir(picPath,FileUtil.htmlEncode(contextPath));
                // System.out.println("picPath = " + picPath + FileUtil.htmlEncode(contextPath));
                if(picName == null){  
                    // 不设置文件名的情况
                    outPicPath = FileUtil.getAllPath(FileUtil.htmlEncode(contextPath) + picPath) + fileName.substring(0,tempLength)+"_small"+picSuffix;
                }
                else{
                    // 有文件名的情况
                    outPicPath = FileUtil.getAllPath(FileUtil.htmlEncode(contextPath) + picPath) + picName + picSuffix; 
                }     
                //System.out.println("outPicPath = " + outPicPath);
            }
            out = new FileOutputStream(outPicPath);
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);       
    		encoder.encode(BufferedImage);                                               //近JPEG编码                             
    		out.close();     
    		
    		// 是否想删除Source原来的图片
    		if(jpeg.isDelSourcePic())
    		    file.delete();
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    }
}