html

最后 上传了这个插件 共学习参考

function addFile(obj){

//document.getElementById('img').src = path;

$.ajaxFileUpload({

url:'${huluUrl}/trainer/upload/ajaxUpload', //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: 'photoFile', //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 infoArray = eval("("+data+")"); //包数据解析为json格式

var arr = infoArray.data;

$("#img").attr("src","/images/"+arr.photo);

},

error: function (){//服务器响应失败处理函数

alert('与服务器通信失败，请稍后再试！');

parent.location.reload();

}

});

}

function preview(img, selection) {

if (!selection.width || !selection.height)

return;

//预览

var scaleX = 100 / selection.width;

var scaleY = 100 / selection.height;

//var imgx = document.getElementById("photo").style.width;

var imgx = parseInt($("#photo").css("width").split("px")[0]);

var imgy = parseInt($("#photo").css("height").split("px")[0]);

console.debug(imgx+"===="+imgy);

$('#preview img').css({

width : Math.round(scaleX * imgx),

height : Math.round(scaleY * imgy),

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);

//后台数据

$('#x1s').val(selection.x1);

$('#y1s').val(selection.y1);

$('#x2s').val(selection.x2);

$('#y2s').val(selection.y2);

$('#imgx').val(parseInt(imgx));//原图width宽度

$('#imgy').val(parseInt(imgy));//原图高度height

}

$(function(selection) {

var imgx = $("#photo").css("width").split("px")[0];

var imgy = $("#photo").css("height").split("px")[0];

var ares = 0;

console.debug(imgx+"===="+imgy);

if(imgx>imgy){

ares = imgy;

}else{

ares = imgx;

}

var ias = $('#photo').imgAreaSelect({

aspectRatio : '1:1',

handles : true,

fadeSpeed : 200,

onSelectChange : preview,

instance : true

});

ias.setSelection(0, 0, ares-1, ares-1);//初始化选择区域

ias.setOptions({

show : true

});

ias.update();

$(".imgareaselect-outer").css("cursor","Crosshair");

$(".imgareaselect-outer").css("background-color","rgba(255,255,255,0.9)");

//预览

var scaleX = 100 / ares;

var scaleY = 100 / ares;

$('#preview img').css({

width : Math.round(scaleX * imgx),

height : Math.round(scaleY * imgy),

marginLeft : -Math.round(scaleX * 0),

marginTop : -Math.round(scaleY * 0)

});

//后台数据

$('#x1s').val(0);

$('#y1s').val(0);

$('#x2s').val(ares-1);

$('#y2s').val(ares-1);

$('#imgx').val(imgx);//原图width宽度

$('#imgy').val(imgy);//原图高度height

});

java

//显示图片需要在服务端配置一个虚拟路径

(tomcat) server.xml

回显一下数据

[java] view plain copy 在CODE上查看代码片派生到我的代码片

/**

* 跳到上传头像2(可截取图片)

*

* @return

*/

@RequestMapping(value = "toUploadPhoto", method = RequestMethod.GET)

public ModelAndView toUploadTest() {

ModelAndView mav = leftMenu("/trainer/upload/uploadPhoto");

//

Trainer trainer = null;

try {

Long userId = FrontShiroUtil.getUserId();

if (null != userId) {

trainer = trainerRepo.findOne(userId);

trainerDbSvc.updateLastLoginTime(userId);

}

} catch (Exception e) {

e.printStackTrace();

}

mav.addObject("trainer", trainer);

return mav;

}

// 局部刷新上传图片

@RequestMapping("/ajaxUpload")

public @ResponseBody AjaxResult ajaxUpload(MultipartHttpServletRequest request) {

Trainer trainer = new Trainer();

// 获得第1张图片(根据前台的name名称得到上传的文件)

MultipartFile file = request.getFile("photoFile");

if (file.getSize() != 0) {

// 获得文件名：

String filename = file.getOriginalFilename();

String timeType = null;

if (null != filename && !filename.equals("")) {

String imgtype = filename.substring(filename.lastIndexOf("."));

// 获取路径

String ctxPath = "E:/rudongImage/photo/";

// 创建文件

File dirPath = new File(ctxPath);

if (!dirPath.exists()) {

dirPath.mkdirs();

}

// 以时间为文件名

Date date = new Date();

SimpleDateFormat sdformat = new SimpleDateFormat("yyyyMMddHHmmss");// 24小时制

String LgTime = sdformat.format(date);

timeType = LgTime + imgtype;

File uploadFile = new File(ctxPath + timeType);

try {

FileCopyUtils.copy(file.getBytes(), uploadFile);

} catch (IOException e) {

e.printStackTrace();

}

}

String headPhotoPath = "photo/" + timeType;

trainer.setPhoto(headPhotoPath);

}

try {

// 根据UserId查询培训师

Long userId = FrontShiroUtil.getUserId();

if (null != userId) {

trainer.setUserId(userId);

// 更新培训师头像

trainerDbSvc.updateTrainerPhoto(trainer);

}

} catch (Exception e) {

e.printStackTrace();

}

return AjaxResult.createSuccess(trainer);//AjaxResult 可修改

}

/**

* 截取区域上传图片测试

*

* @return

*/

@RequestMapping(value = "uploadPhotoTest", method = RequestMethod.POST)

public ModelAndView uploadPhotoTest(MultipartHttpServletRequest request, @RequestParam("x1s") Integer x1,

@RequestParam("y1s") Integer y1, @RequestParam("x2s") Integer x2, @RequestParam("y2s") Integer y2,

@RequestParam("imgx") Integer imgWidth, @RequestParam("imgy") Integer imgHeight) {

ModelAndView mav = leftMenu("redirect:/trainer/upload/toUploadPhoto");

Trainer trainer = null;

try {

// 根据UserId查询培训师

Long userId = FrontShiroUtil.getUserId();

if (null != userId) {

trainer = trainerRepo.findOne(userId);

}

} catch (Exception e) {

e.printStackTrace();

}

File uploadFile = new File("E:/rudongImage/" + trainer.getPhoto());

InputStream is = null;

BufferedImage src = null;

int w = -1;

int h = -1;

try {

is = new FileInputStream(uploadFile);

src = javax.imageio.ImageIO.read(is);

w = src.getWidth(null); // 得到源图宽

h = src.getHeight(null); // 得到源图高

is.close();

} catch (Exception e) {

e.printStackTrace();

}

Integer l = 0;

// 以小边为准(原图尺寸)

if (w < h) {

l = w;

} else {

l = h;

}

// 以小边为准(缩略图尺寸)

Integer l2 = 0;

if (imgWidth < imgHeight) {

l2 = imgWidth;

} else {

l2 = imgHeight;

}

Integer x = (x1 * l) / l2;// 起点x

Integer y = (y1 * l) / l2;// 起点y

Integer xs = (x2 * l) / l2;// 终点x 对角线位置

Integer ys = (y2 * l) / l2;// 终点y 对角线位置

ImageUtil imageUtil = new ImageUtil();

// 返回截取后的文件名

String photoName = "";

imageUtil.cutImage(uploadFile, "E:/rudongImage/photo/", x, y, xs - x, ys - y);

String headPhotoPath = "photo/" + photoName;

trainer.setPhoto(headPhotoPath);

// 更新培训师头像

trainerDbSvc.updateTrainerPhoto(trainer);

return mav;

}

工具类

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.Rectangle;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.Arrays;

import java.util.Iterator;

import javax.imageio.ImageIO;

import javax.imageio.ImageReadParam;

import javax.imageio.ImageReader;

import javax.imageio.stream.ImageInputStream;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

* 图片截取工具类

*/

public class ImageUtil {

private Logger log = LoggerFactory.getLogger(getClass());

private static String DEFAULT_THUMB_PREVFIX = "thumb_";

private static String DEFAULT_CUT_PREVFIX = "cut_";

private static Boolean DEFAULT_FORCE = false;

/**

*

Title: cutImage

*

Description: 根据原图与裁切size截取局部图片

* @param srcImg 源图片

* @param output 图片输出流

* @param rect 需要截取部分的坐标和大小

*/

public void cutImage(File srcImg, OutputStream output, java.awt.Rectangle rect){

if(srcImg.exists()){

java.io.FileInputStream fis = null;

ImageInputStream iis = null;

try {

fis = new FileInputStream(srcImg);

// ImageIO 支持的图片类型 : [BMP, bmp, jpg, JPG, wbmp, jpeg, png, PNG, JPEG, WBMP, GIF, gif]

String types = Arrays.toString(ImageIO.getReaderFormatNames()).replace("]", ",");

String suffix = null;

// 获取图片后缀

if(srcImg.getName().indexOf(".") > -1) {

suffix = srcImg.getName().substring(srcImg.getName().lastIndexOf(".") + 1);

}// 类型和图片后缀全部小写，然后判断后缀是否合法

if(suffix == null || types.toLowerCase().indexOf(suffix.toLowerCase()+",") < 0){

log.info("Sorry, the image suffix is illegal. the standard image suffix is {}." + types);

return ;

}

// 将FileInputStream 转换为ImageInputStream

iis = ImageIO.createImageInputStream(fis);

// 根据图片类型获取该种类型的ImageReader

ImageReader reader = ImageIO.getImageReadersBySuffix(suffix).next();

reader.setInput(iis,true);

ImageReadParam param = reader.getDefaultReadParam();

param.setSourceRegion(rect);

BufferedImage bi = reader.read(0, param);

ImageIO.write(bi, suffix, output);

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

if(fis != null) fis.close();

if(iis != null) iis.close();

if(output != null) output.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}else {

log.info("the src image is not exist.");

}

}

public void cutImage(File srcImg, OutputStream output, int x, int y, int width, int height){

cutImage(srcImg, output, new java.awt.Rectangle(x, y, width, height));

}

public void cutImage(File srcImg, String destImgPath, java.awt.Rectangle rect){

File destImg = new File(destImgPath);

if(destImg.exists()){

String p = destImg.getPath();

try {

if(!destImg.isDirectory()) p = destImg.getParent();

if(!p.endsWith(File.separator)) p = p + File.separator;

cutImage(srcImg, new java.io.FileOutputStream(p + DEFAULT_CUT_PREVFIX + "_" + new java.util.Date().getTime() + "_" + srcImg.getName()), rect);

} catch (FileNotFoundException e) {

log.info("the dest image is not exist.");

}

}else log.info("the dest image folder is not exist.");

}

public void cutImage(File srcImg, String destImg, int x, int y, int width, int height){

cutImage(srcImg, destImg, new java.awt.Rectangle(x, y, width, height));

}

public void cutImage(String srcImg, String destImg, int x, int y, int width, int height){

cutImage(new File(srcImg), destImg, new java.awt.Rectangle(x, y, width, height));

}

/**

*

Title: thumbnailImage

*

Description: 根据图片路径生成缩略图

* @param imagePath 原图片路径

* @param w 缩略图宽

* @param h 缩略图高

* @param prevfix 生成缩略图的前缀

* @param force 是否强制按照宽高生成缩略图(如果为false，则生成最佳比例缩略图)

*/

public void thumbnailImage(File srcImg, OutputStream output, int w, int h, String prevfix, boolean force){

if(srcImg.exists()){

try {

// ImageIO 支持的图片类型 : [BMP, bmp, jpg, JPG, wbmp, jpeg, png, PNG, JPEG, WBMP, GIF, gif]

String types = Arrays.toString(ImageIO.getReaderFormatNames()).replace("]", ",");

String suffix = null;

// 获取图片后缀

if(srcImg.getName().indexOf(".") > -1) {

suffix = srcImg.getName().substring(srcImg.getName().lastIndexOf(".") + 1);

}// 类型和图片后缀全部小写，然后判断后缀是否合法

if(suffix == null || types.toLowerCase().indexOf(suffix.toLowerCase()+",") < 0){

log.info("Sorry, the image suffix is illegal. the standard image suffix is {}." + types);

return ;

}

log.info("target image's size, width:{}, height:{}.",w,h);

Image img = ImageIO.read(srcImg);

// 根据原图与要求的缩略图比例，找到最合适的缩略图比例

if(!force){

int width = img.getWidth(null);

int height = img.getHeight(null);

if((width*1.0)/w < (height*1.0)/h){

if(width > w){

h = Integer.parseInt(new java.text.DecimalFormat("0").format(height * w/(width*1.0)));

log.info("change image's height, width:{}, height:{}.",w,h);

}

} else {

if(height > h){

w = Integer.parseInt(new java.text.DecimalFormat("0").format(width * h/(height*1.0)));

log.info("change image's width, width:{}, height:{}.",w,h);

}

}

}

BufferedImage bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

Graphics g = bi.getGraphics();

g.drawImage(img, 0, 0, w, h, Color.LIGHT_GRAY, null);

g.dispose();

// 将图片保存在原目录并加上前缀

ImageIO.write(bi, suffix, output);

output.close();

} catch (IOException e) {

System.out.println("generate thumbnail image failed."+e);

}

}else{

System.out.println("the src image is not exist.");

}

}

public void thumbnailImage(File srcImg, int w, int h, String prevfix, boolean force){

String p = srcImg.getAbsolutePath();

try {

if(!srcImg.isDirectory()) p = srcImg.getParent();

if(!p.endsWith(File.separator)) p = p + File.separator;

thumbnailImage(srcImg, new java.io.FileOutputStream(p + prevfix +srcImg.getName()), w, h, prevfix, force);

} catch (FileNotFoundException e) {

log.info("the dest image is not exist."+e);

}

}

public void thumbnailImage(String imagePath, int w, int h, String prevfix, boolean force){

File srcImg = new File(imagePath);

thumbnailImage(srcImg, w, h, prevfix, force);

}

public void thumbnailImage(String imagePath, int w, int h, boolean force){

thumbnailImage(imagePath, w, h, DEFAULT_THUMB_PREVFIX, DEFAULT_FORCE);

}

public void thumbnailImage(String imagePath, int w, int h){

thumbnailImage(imagePath, w, h, DEFAULT_FORCE);

}

public void readUsingImageReader(String src, String dest, int w, int h)throws Exception {

// 取得图片读入器

Iterator readers = ImageIO.getImageReadersByFormatName("png");

ImageReader reader = (ImageReader) readers.next();

// 取得图片读入流

InputStream source = new FileInputStream(src);

ImageInputStream iis = ImageIO.createImageInputStream(source);

reader.setInput(iis, true);

// 图片参数

ImageReadParam param = reader.getDefaultReadParam();

// 100，200是左上起始位置，300就是取宽度为300的，就是从100开始取300宽，就是横向100~400，同理纵向200~350的区域就取高度150

// Rectangle rect = new Rectangle(100, 200, 300, 150);//

int hh = 0;

if (h > 100)

hh = (h - 100) / 3;

Rectangle rect = new Rectangle(0, hh, 227, 100);

param.setSourceRegion(rect);

BufferedImage bi = reader.read(0, param);

ImageIO.write(bi,"jpg", new File(dest));

}

public static void main(String[] args) throws Exception {

//new ImageUtil().thumbnailImage("imgs/Tulips.jpg", 150, 100);

//new ImageUtil().cutImage("imgs/Tulips.jpg","imgs", 250, 70, 300, 400);

//new ImageUtil().readUsingImageReader("e://rudongImage/photo/20160302090226.png", "e://rudongImage/photo/2.png", 227, 163);

}

}

xml配置

class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

插件连接

样式没调 有点丑功能都有。