使用Map传出两个最大值和最小值

参数中 int conWidth,int conHeight 分别是存放图片窗口的长和宽源码：/**

* scaleImg()； 图像缩放方法,将图片缩放到适合控件的大小

* ImageIcon image为显示的图片

* int conWidth,int conHeight 分别是存放图片窗口的的长和宽

*/

public static Map scaleImage(ImageIcon image, double conWidth, double conHeight) {

Map imgWidthAndHeight = new HashMap();

//默认的边框间距

final double SMALL_SCALE = 0.95;

double imgWidth = image.getIconWidth();

double imgHeight = image.getIconHeight();

//原图的宽长比

double imgRatio = imgWidth/imgHeight;

//最终输出宽和长

double reImgWidth = 0;

double reImgHeight = 0;

//若原图的宽小于控件宽

if(imgWidth < conWidth){

if(imgHeight < conHeight){

reImgWidth = conWidth*SMALL_SCALE;

reImgHeight = reImgWidth/imgRatio;

}

else {

reImgHeight = conHeight*SMALL_SCALE;

reImgWidth = reImgHeight*imgRatio;

}

}

//若原图的宽大于控件宽

else {

if(imgHeight < conHeight){

reImgWidth = conWidth*SMALL_SCALE;

reImgHeight = reImgWidth/imgRatio;

}

//若原图的长宽同时大于控件的长宽，最复杂的情况

else {

//控件的长比宽大

double conRatio = conWidth/conHeight;

if (imgRatio < conRatio){

reImgHeight = conHeight*SMALL_SCALE;

reImgWidth = reImgHeight*imgRatio;

}

else {

reImgWidth = conWidth*SMALL_SCALE;

reImgHeight = reImgWidth/imgRatio;

}

}

}

imgWidthAndHeight.put("width", (int) reImgWidth);

imgWidthAndHeight.put("height", (int) reImgHeight);

return imgWidthAndHeight;

}

使用方法://图片等比缩放函数

Map imgWidthAndHeight = ImageProcess.scaleImage(image,IMG_WIDTH,IMG_HEIGHT);

scaleWidth = imgWidthAndHeight.get("width");

scaleHeight= imgWidthAndHeight.get("height");