var scaleX = 100 / selection.width;
var scaleY = 100 / selection.height;

$('#preview img').css({
width: Math.round(scaleX 300),height: Math.round(scaleY 300),marginLeft: -Math.round(scaleX selection.x1),marginTop: -Math.round(scaleY selection.y1)
});

$('#x1').val(selection.x1);
$('#y1').val(selection.y1);
$('#x2').val(selection.x2);
$('#y2').val(selection.y2);
$('#w').val(selection.width);
$('#h').val(selection.height);
}

$(function () {

});

//上传原始图片
function uplodImage(target) {
if(checkImage(target)){
var url = httpUtils.rootPath+'/component/upload.do';
$.ajaxFileUpload({
url: url,//用于文件上传的服务器端请求地址
secureuri: false,//是否需要安全协议，一般设置为false
fileElementId: 'uplodimage',//文件上传域的ID
dataType: 'json',//返回值类型 一般设置为json
success: function (data) //服务器成功响应处理函数
{
var filePath = data.filePath;
$('#photo').attr('src',httpUtils.rootPath+'/component/upload.do?action=download&filepath='+filePath);
$('#smallImage').attr('src',httpUtils.rootPath+'/component/upload.do?action=download&filepath='+filePath);
$('#imgUrl').val(filePath);
$('#photo').imgAreaSelect({
aspectRatio: '1:1',x1: 50,y1: 50,x2: 241,y2: 241,handles: true,fadeSpeed: 200,onSelectChange: preview
});
$('#x1').val("50");
$('#y1').val("50");
$('#x2').val("241");
$('#y2').val("241");
$('#w').val("191");
$('#h').val("191");
}
});
}

}

//上传裁剪后的图片
function upold() {

if($('#imgUrl').val()==''){
layer.alert("请先选择图片在上传");
return false;
}

$.ajax({
type: "post",url:httpUtils.rootPath+'/user/setHeadPicture',beforeSend: function(request) {
request.setRequestHeader("jmtcp",header);
},async:false,data: {
x:$('#x1').val(),y:$('#y1').val(),width: $('#w').val(),imgUrl : $('#imgUrl').val(),heigth: $('#h').val()
},dataType: "json",success: function(data){
if(data.code==1){

          layer.alert(data.message,function(){ 
            window.location.href = '../user/grzy.html'; 
          }); 
        }else{ 
          layer.alert(data.message); 
        } 
       } 
 }); 

}

function checkImage(target) {
var isIE = /msie/i.test(navigator.userAgent) && !window.opera;
var fileSize = 0;
var filepath = target.value;
// 为了避免转义反斜杠出问题，这里将对其进行转换
var re = /(+)/g;
var filename = filepath.replace(re,"#");
// 对路径字符串进行剪切截取
var one = filename.split("#");
// 获取数组中最后一个，即文件名
var two = one[one.length - 1];
// 再对文件名进行截取，以取得后缀名
var three = two.split(".");
// 获取截取的最后一个字符串，即为后缀名
var last = three[three.length - 1];
// 添加需要判断的后缀名类型
var tp = "jpg,gif,bmp,JPG,GIF,BMP,png";
// 返回符合条件的后缀名在字符串中的位置
var rs = tp.indexOf(last);
// 如果返回的结果大于或等于0，说明包含允许上传的文件类型
if(rs < 0){
layer.alert('您选择的上传文件不是有效的图片文件');
return false;
}
// if (isIE && !target.files) { // IE浏览器
// var filePath = target.value; // 获得上传文件的绝对路径
// var fileSystem = new ActiveXObject("Scripting.FileSystemObject");
// // GetFile(path) 方法从磁盘获取一个文件并返回。
// var file = fileSystem.GetFile(filePath);
// fileSize = file.Size; // 文件大小，单位：b
// }
// else { // 非IE浏览器
// fileSize = target.files[0].size;
// }
var img1 = document.getElementById('photo');
//img1.dynsrc=target.value;
//img1.fileSize：IE ， fileObj.files[0].fileSize：chrome， fileObj.files[0].size：FF
var fileSize = img1.fileSize || target.files[0].fileSize || target.files[0].size;
var size = fileSize / 1024 / 1024;
if (size > 5) {
layer.alert("图片不能大于5M");
return false;
}
return true;
}

public static String cutImage(int x,int y,int width,int height,String srcPath) throws Exception{
String root = ApplicationContext.getProperty("upload_folder");
String imagePath = root+srcPath;
FileInputStream is = null;
ImageInputStream iis = null;
String uploadFolder = null ;
String filepath = null ;
String serverName = null ;
uploadFolder = ApplicationContext.getProperties().getProperty("upload_folder").toString() ;
filepath = generateServerFolder() ;
serverName = generateServerName(srcPath) ;
File file = new File(uploadFolder + filepath);
if (!file.exists()) {
file.mkdirs();
}

 try { 
  // 读取<a href="https://www.jb51.cc/tag/tupian/" target="_blank" class="keywords">图片</a><a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a>  
  saveMinPhoto(imagePath,imagePath,300,0.9d); 
   //resetsize(imagePath,imagePath); 
  is = new FileInputStream(imagePath); 
  String ext = srcPath.substring(srcPath.lastIndexOf(".") + 1);  
   Iterator<ImageReader> it = ImageIO.getImageReadersByFormatName(ext);  
   ImageReader reader = it.next();  
  // <a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a><a href="https://www.jb51.cc/tag/tupian/" target="_blank" class="keywords">图片</a>流  
   iis = ImageIO.createImageInputStream(is);  
   reader.setInput(iis,true);  
   ImageReadParam param = reader.getDefaultReadParam();  
   /**  
     *  
     * <a href="https://www.jb51.cc/tag/tupian/" target="_blank" class="keywords">图片</a>裁剪区域。Rectangle 指定了坐标空间中的一个区域，通过 Rectangle 对象  
     *  
     * 的左上顶点的坐标(x，y)、宽度和高度可以定义这个区域。  
     */  
   Rectangle rect = new Rectangle(x,y,width,height);  

    // 提供一个 BufferedImage，将其用作解码像素数据的目标。  
   param.setSourceRegion(rect);  
   BufferedImage bi = reader.read(0,param);  
   // 保存新<a href="https://www.jb51.cc/tag/tupian/" target="_blank" class="keywords">图片</a>  
   ImageIO.write(bi,new File(uploadFolder + filepath + serverName));  
} catch (FileNotFoundException e) { 
  // TODO Auto-generated catch block 
  if (is != null)  
    is.close();  
  if (iis != null)  
    iis.close();  
  e.printStackTrace(); 
}  
 return filepath + serverName ; 

}

/** 

• @param config
• @param file
• @param request
• @return
  */
  public static String generateServerName(String clientPath) {
  //按当前时间的分钟毫秒+3位随机数
  Calendar c = Calendar.getInstance();
  String min = get(c,Calendar.MINUTE);
  String sec = get(c,Calendar.SECOND);
  String mis = get(c,Calendar.MILLISECOND);
  String rnd = random();
  String ext = getFileExt(getClientName(clientPath));

return min + sec + mis + rnd + ext ; 

}

/* 客户端文件名 /
public static String getClientName(String clientPath) {
if(null != clientPath){
int index1 = clientPath.lastIndexOf("/");
int index2 = clientPath.lastIndexOf("\");
if(index2 > index1){
index1 = index2;
}
return clientPath.substring(index1+1,clientPath.length());
}
return null;
}

public static String getFileExt(String fileName){
if(null != fileName){
int dot = fileName.lastIndexOf(".");
if(dot >= 0){
return fileName.substring(dot);
}
}
return "";
}

public static String random(){
String value = String.valueOf(rnd.nextInt(1000));
if(value.length() < 3){
for(int i=value.length();i<3;i++){
value = "0" + value;
}
}
return value;
}

public static String generateServerFolder() {
//按当前年月日和小时生成文件路径
Calendar c = Calendar.getInstance();
String year = get(c,Calendar.YEAR);
String mon = get(c,Calendar.MONTH);
String day = get(c,Calendar.DAY_OF_MONTH);
String hour = get(c,Calendar.HOUR_OF_DAY);

return year + "/" + mon + "/" + day + "/" + hour + "/"; 

}

public static String get(Calendar c,int field){
int v = c.get(field);
if(field == Calendar.MONTH){
v += 1;
}
String value = String.valueOf(v);
if(value.length() == 1){
value = "0" + value;
}
return value;
}

/**

• 缩小图片到固定长高
• @param srcImagePath 读取图片路径
• @param toImagePath 写入图片路径
• @param width 缩小后图片宽度
• @param height 缩小后图片长度
• @throws IOException
  */
  public static void reduceImageByWidthHeight(String srcImagePath,String toImagePath,int height) throws IOException{
  FileOutputStream out = null;
  try{
  //读入文件
  File file = new File(srcImagePath);
  String ext = srcImagePath.substring(srcImagePath.lastIndexOf(".") + 1);
  // 构造Image对象
  BufferedImage src = javax.imageio.ImageIO.read(file);
  // 缩小边长
  BufferedImage tag = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
  // 绘制缩小后的图片
  tag.getGraphics().drawImage(src,null);
  out = new FileOutputStream(toImagePath);
  ImageIO.write(tag,new File(toImagePath));
  }catch(Exception e){
  e.printStackTrace();
  }finally{
  if(out != null){
  out.close();
  }
  out = null;
  System.gc();
  }
  }

/**

• 等比例压缩算法：
• 算法思想：根据压缩基数和压缩比来压缩原图，生产一张图片效果最接近原图的缩略图
• @param srcURL 原图地址
• @param deskURL 缩略图地址
• @param comBase 压缩基数
• @param scale 压缩限制(宽/高)比例 一般用1：
• 当scale>=1,new File(deskURL));
  deskImage.close();
  }

public static void main(String[] args) {
try {
String src = CutImageUtils.cutImage(11,12,100,"2017/01/04/17/6348162d-5b50-4e7d-b414-93140498f8de.jpg");
System.out.println(src);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}