JavaWeb完成裁剪圖片上傳完全代碼。本站提示廣大學習愛好者：（JavaWeb完成裁剪圖片上傳完全代碼）文章只能為提供參考，不一定能成為您想要的結果。以下是JavaWeb完成裁剪圖片上傳完全代碼正文
本文實例為年夜家分享了JavaWeb完成裁剪圖片上傳完全案例，供年夜家參考，詳細內容以下
完成思緒
•應用jcrop插件手機要裁剪圖片的坐標
•將搜集到的參數傳遞到後台，在後台應用java圖形對象繪制圖象停止裁剪
◦後台處置流程：
1、將上傳的圖片按依照比例停止緊縮後上傳到文件辦事器，而且將緊縮後的圖片保留在當地暫時目次中。
2、將緊縮後的圖片回顯到頁面，應用jcrop停止裁剪，手機裁剪坐標（x,y,width,height）
■@paramx 目的切片終點坐標X
■@param y 目的切片終點坐標Y
■@param width 目的切片寬度
■@param height 目的切片高度
3、後台處置裁剪裁剪，從新上傳
jsp頁面
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!doctype html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>上傳用戶頭像</title>
<link href="${pageContext.request.contextPath}/js/cutImg/css/master.css" rel="stylesheet" />
<link href="${pageContext.request.contextPath}/js/cutImg/css/upload.css" rel="stylesheet" />
<link href="${pageContext.request.contextPath}/js/cutImg/css/jquery.rollbar.css" rel="stylesheet" />
<link href="${pageContext.request.contextPath}/js/cutImg/css/jquery.Jcrop.css" rel="stylesheet" />
</head>
<body>
<div class="user_upload">
<form id="uploadImgFrom" enctype="multipart/form-data" method="post">
<div class="upload">
<div class="upload_left">
<div class="pic">
<div class="pic2" id="pic2" >
<div id="uploadFile">
<div class="upload_btn" >
<a href="javascript:;" id="upText" >上傳頭像</a>
</div>
<p>
支撐jpg、png格局<br />
圖片小於2M
</p>
</div>
<!--回顯示圖片-->
<img src="" name="photo" id="originalImg" alt=""/>
</div>
</div>
<p class="up_reload" id="up_reload" >
<a href="javascript:;" >從新上傳</a>
</p>
<input type="hidden" name="picval" id="picval" />
<input type="hidden" name="origpicval" id="origpicval" value="" />
<input type="hidden" name="temporigpic" id="temporigpic" />
<input type="hidden" name="fileID" id="fileID" size="100" />
<input type="hidden" name="fileUrl" id="fileUrl" size="100" />
<input type="hidden" name="imgHeight" id="imgHeight" size="100" />
<input type="hidden" name="imgWidth" id="imgWidth" size="100" />
</div>
<div class="upload_right">
<div class="upload_view_pic" >
<img id="preview_1" src="${pageContext.request.contextPath}/images/4-3.jpg"/>
</div>
<p>
400 x 300像素
</p>
<%--<div class="upload_view_pic" >
<img id="preview_2" src=${pageContext.request.contextPath}/images/4-3.jpg />
</div>
<p>
80 x 80像素
</p>--%>
<p>
拖拽或縮放，生成本身滿足的頭像
</p>
</div>
<%-- <div id="img_description">
<textarea
</div>--%>
<div class="upload_b">
<font id="upalert"></font>
</div>
</div>
<input type="hidden" name="x" id="x" size="5" />
<input type="hidden" name="y" id="y" size="5" />
<input type="hidden" name="w" id="w" size="5" />
<input type="hidden" name="h" id="h" size="5" />
<input type="hidden" name="imgUrl" id="imgUrl"/>
<input type="hidden" name="imgId" id="imgId"/>
<div class="upload_submit_contain">
<div class="upload_submit" id="saveImage">
<a href="javascript:;" >保留頭像</a>
</div>
</div>
</form>
</div>
</body>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery.form.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery.validate.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/check.js"></script>
<script src="${pageContext.request.contextPath}/js/cutImg/js/jquery-1.7.1.min.js" type="text/javascript"></script>
<script src="${pageContext.request.contextPath}/js/cutImg/js/jquery.form.js" type="text/javascript"></script>
<script src="${pageContext.request.contextPath}/js/cutImg/js/jquery-custom-file-input.js" type="text/javascript"></script>
<script src="${pageContext.request.contextPath}/js/cutImg/js/jquery.Jcrop.js" type="text/javascript"></script>
<script src="${pageContext.request.contextPath}/js/cutImg/js/jquery.rollbar.min.js" type="text/javascript"></script>
<script src="${pageContext.request.contextPath}/js/cutImg/js/upload.ui.photos.js" type="text/javascript"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/dialog/dialog.js?lib=false"></script>
<script type="text/javascript">
photos.JcorpWidth = 400;//裁剪選擇框寬度
photos.JcorpHeight = 300;//裁剪框選擇高度
// photos.Widths = ["200", "80"];// 圖片年夜小“寬”數組，依據圖片張數由年夜到小界說分歧圖片的寬度
// photos.Heights = ["200", "80"];// 圖片年夜小“高”數組，依據圖片張數由年夜到小界說分歧圖片的高度
photos.UpLoad_FileID = "uploadFile";//上傳組件屬性ID
photos.UpLoad_FileTextID = "upText";//上傳組件按鈕文本ID
photos.UpLoad_AlertID = "upalert";//提醒文本ID
photos.UpLoad_AlertClassName = "error";//提醒文本增長的款式
photos.Upload_FormID = "uploadImgFrom";//上傳組件表單ID
photos.UpLoad_OriginFileID = "originalImg";//底圖圖片ID
photos.UpLoad_ReLoadID = "up_reload";//從新上傳組件ID
photos.UpLoad_PicValueID = "picval";//上傳的底圖片內容ID
photos.UpLoad_PicFileID = "fileID";////上傳圖片id
photos.UpLoad_PicFileUrl = "fileUrl";////上傳圖片url
photos.UpLoad_PicImgHeight="imgHeight";//上傳的底圖高
photos.UpLoad_PicImgWidth="imgWidth";//上傳的底圖寬
photos.UpLoad_TempOriginValueID = "temporigpic";//本頁面從新上傳時的原圖片內容ID
photos.UpLoad_OriginValueID = "origpicval";//其他頁面進入時的原圖片內容ID
photos.Upload_RollbarID = "pic2";//自界說轉動條ID
photos.UpLoad_SaveID = "saveImage";//圖片保留按鈕ID
photos.UpLoad_PreviewPreFix = "preview_";//多個分歧尺寸小圖的ID前綴稱號，多個小圖ID格局“前綴”+數字編號（從1開端），例：id="photos_preview1" ...
photos.ParentFileImgID = "imgUrl";//父級圖片控件ID
photos.ParentFileValueID = "imgId";//父級圖片地址控件ID
photos.XID = "x";//x
photos.YID = "y";//y
photos.WID = "w";//w
photos.HID = "h";//h
photos.UpText_Format = "負疚，暫只支撐 jpg、png、bmp 格局";//圖片格局驗證文本
/* photos.UpText_Size = "負疚，圖片年夜小不克不及跨越2M";*///圖片年夜小驗證文本
/*photos.UpText_Error = "圖片上傳失足";//上傳失足文本*/
photos.Url_Check = "/Enterprise/filescheck";//文件驗證年夜小的地址
photos.Url_UpLoad = "/Enterprise/uploadphoto?up=original";//上傳圖片載入底圖的地址
photos.Url_ReLoad = "";//從新上傳的地址
photos.Url_Save = "/Enterprise/saveimg?up=save";//保留圖片的地址
</script>
</html>
後台java代碼
圖片上傳對象類
package com.shengya.service.utils;
import com.shengya.service.ImgContants;
import org.apache.commons.fileupload.disk.DiskFileItem;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
import sun.misc.BASE64Encoder;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
/**
* @author Darcy
* Created by Administrator on 2016/6/17.
*/
public class UploadUtils {
// public final static String RADIOURL = "http://211.102.216.237:8011/fileServer/webapi/Attachments/bio?";
public final static String RADIOURL = "http://192.168.1.15:8088/fileServer/webapi/Attachments/bio?";
public final static String URL = ImgContants.IMG_UPLOAD + "/file/UpLoadImage?";
public final static String FILEURL = ImgContants.IMG_UPLOAD + "/file/UpLoadFile?";
public final static String VEDIOURL = ImgContants.FILE_UPLOAD + "/file/UpLoadFile?";
public final static String CROPURL = ImgContants.IMG_UPLOAD + "/file/CropImage?";
private static byte[] readAsByteArr(InputStream is) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
byte[] bytes = new byte[1024];
int length = 0;
while ((length = is.read(bytes)) != -1) {
baos.write(bytes, 0, length);
}
return baos.toByteArray();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
baos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
/**
* 上傳圖片
*
* @param file
*/
public static String submitImage(File file) throws UnsupportedEncodingException {
String fileName = URLEncoder.encode(file.getName(), "UTF-8");
long fileSize = file.length();
boolean isReSuffix = true;
int height = 0;
int width = 500;
String mark = "t";
String mode = "W";
String url = sign(URL)
+ "&ChannelNo=muying_android"
+ "&FileName="
+ fileName
+ "&FileSize="
+ fileSize
+ "&IsReSuffix="
+ isReSuffix
+ "&Height="
+ height
+ "&Width="
+ width + "&Mark=" + mark + "&Mode=" + mode;
System.out.println("url:" + url);
HttpURLConnection conn = null;
OutputStream outStream = null;
BufferedInputStream bin = null;
try {
bin = new BufferedInputStream(new FileInputStream(file));
conn = (HttpURLConnection) new URL(url)
.openConnection();
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setDoOutput(true);
// conn.setFixedLengthStreamingMode(file.length());
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", file.length()
+ "");
// conn.setRequestProperty("Range", "bytes="+"");
// 設置 HttpURLConnection的字符編碼
conn.setRequestProperty("Accept-Charset", "UTF-8");
outStream = conn.getOutputStream();
byte[] buf = new byte[1024];
int len = 0;
int lenCount = 0;
while ((len = bin.read(buf)) != -1) {
outStream.write(buf, 0, len);//OK
lenCount = lenCount + len;
}
outStream.flush();
int responseCode = conn.getResponseCode();
if (responseCode == 200) {
InputStream inStream = conn.getInputStream();
byte[] data1 = readAsByteArr(inStream);
String json = new String(data1);
inStream.close();
return json;
} else {
InputStream inStream = conn.getInputStream();
byte[] data1 = readAsByteArr(inStream);
String json = new String(data1);
inStream.close();
return json;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (outStream != null) {
outStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
/**
* 上傳圖片
*
* @param file
*/
public static String submitWebImage(MultipartFile file) throws UnsupportedEncodingException {
String fileName = URLEncoder.encode(file.getOriginalFilename(), "UTF-8");
long fileSize = file.getSize();
boolean isReSuffix = true;
int height = 0;
int width = 500;
String mark = "t";
String mode = "W";
String url = sign(URL)
+ "&ChannelNo=muying_android"
+ "&FileName="
+ fileName
+ "&FileSize="
+ fileSize
+ "&IsReSuffix="
+ isReSuffix
+ "&Height="
+ height
+ "&Width="
+ width + "&Mark=" + mark + "&Mode=" + mode;
System.out.println("url:" + url);
HttpURLConnection conn = null;
OutputStream outStream = null;
BufferedInputStream bin = null;
try {
bin = new BufferedInputStream(file.getInputStream());
conn = (HttpURLConnection) new URL(url)
.openConnection();
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setDoOutput(true);
// conn.setFixedLengthStreamingMode(file.length());
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", file.getSize()
+ "");
// conn.setRequestProperty("Range", "bytes="+"");
// 設置 HttpURLConnection的字符編碼
conn.setRequestProperty("Accept-Charset", "UTF-8");
outStream = conn.getOutputStream();
byte[] buf = new byte[1024];
int len = 0;
int lenCount = 0;
while ((len = bin.read(buf)) != -1) {
outStream.write(buf, 0, len);//OK
lenCount = lenCount + len;
}
outStream.flush();
int responseCode = conn.getResponseCode();
if (responseCode == 200) {
InputStream inStream = conn.getInputStream();
byte[] data1 = readAsByteArr(inStream);
String json = new String(data1);
inStream.close();
return json;
} else {
InputStream inStream = conn.getInputStream();
byte[] data1 = readAsByteArr(inStream);
String json = new String(data1);
inStream.close();
return json;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (outStream != null) {
outStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
/**
* 上傳視頻
*
* @param file
*/
public static String submitRadio(MultipartFile file) throws Exception {
String url = signRadio(RADIOURL);
System.out.println("url:" + url);
HttpURLConnection conn = null;
OutputStream outStream = null;
BufferedInputStream bin = null;
try {
bin = new BufferedInputStream(file.getInputStream());
conn = (HttpURLConnection) new URL(url)
.openConnection();
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setDoOutput(true);
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", file.getSize()
+ "");
conn.setRequestProperty("Accept-Charset", "UTF-8");
outStream = conn.getOutputStream();
byte[] buf = new byte[1024];
int len = 0;
int lenCount = 0;
while ((len = bin.read(buf)) != -1) {
outStream.write(buf, 0, len);//OK
lenCount = lenCount + len;
}
outStream.flush();
int responseCode = conn.getResponseCode();
if (responseCode == 200) {
InputStream inStream = conn.getInputStream();
byte[] data1 = readAsByteArr(inStream);
String json = new String(data1);
inStream.close();
return json;
} else {
InputStream inStream = conn.getInputStream();
byte[] data1 = readAsByteArr(inStream);
String json = new String(data1);
inStream.close();
return json;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (outStream != null) {
outStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
/**
* 上傳簡歷快照
*
* @param fileName
* @param content
* @return
* @throws UnsupportedEncodingException
*/
public static String submitFile(String fileName, String content) throws UnsupportedEncodingException {
//content = URLEncoder.encode(content, "UTF-8");
fileName = URLEncoder.encode(fileName, "UTF-8");
byte[] contentBytes = content.getBytes();
long fileSize = contentBytes.length;
boolean isReSuffix = true;
int height = 0;
int width = 500;
String mark = "t";
String mode = "W";
String url = sign(FILEURL)
+ "&ChannelNo=muying_android"
+ "&FileName="
+ fileName
+ "&FileSize="
+ fileSize
+ "&IsReSuffix="
+ isReSuffix
+ "&Height="
+ height
+ "&Width="
+ width + "&Mark=" + mark + "&Mode=" + mode;
System.out.println("url:" + url);
HttpURLConnection conn = null;
OutputStream outStream = null;
BufferedInputStream bin = null;
try {
conn = (HttpURLConnection) new URL(url)
.openConnection();
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setDoOutput(true);
// conn.setFixedLengthStreamingMode(file.length());
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", content.length()
+ "");
// conn.setRequestProperty("Range", "bytes="+"");
// 設置 HttpURLConnection的字符編碼
conn.setRequestProperty("Accept-Charset", "UTF-8");
outStream = conn.getOutputStream();
outStream.write(contentBytes, 0, contentBytes.length);//OK
outStream.flush();
int responseCode = conn.getResponseCode();
if (responseCode == 200) {
InputStream inStream = conn.getInputStream();
byte[] data1 = readAsByteArr(inStream);
String json = new String(data1);
inStream.close();
return json;
} else {
InputStream inStream = conn.getInputStream();
byte[] data1 = readAsByteArr(inStream);
String json = new String(data1);
inStream.close();
return json;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (outStream != null) {
outStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
/**
* 上傳附件
*
* @return json 字符串
* @throws UnsupportedEncodingException
*/
public static String submitFile(MultipartFile file) throws UnsupportedEncodingException {
String fileName = URLEncoder.encode(file.getOriginalFilename(), "UTF-8");
long fileSize = file.getSize();
boolean isReSuffix = true;
int height = 0;
int width = 500;
String mark = "t";
String mode = "W";
String url = sign(FILEURL)
+ "&ChannelNo=muying_android"
+ "&FileName="
+ fileName
+ "&FileSize="
+ fileSize
+ "&IsReSuffix="
+ isReSuffix
+ "&Height="
+ height
+ "&Width="
+ width + "&Mark=" + mark + "&Mode=" + mode;
System.out.println("url:" + url);
HttpURLConnection conn = null;
OutputStream outStream = null;
BufferedInputStream bin = null;
try {
bin = new BufferedInputStream(file.getInputStream());
conn = (HttpURLConnection) new URL(url)
.openConnection();
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setDoOutput(true);
// conn.setFixedLengthStreamingMode(file.length());
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", file.getSize()
+ "");
// conn.setRequestProperty("Range", "bytes="+"");
// 設置 HttpURLConnection的字符編碼
conn.setRequestProperty("Accept-Charset", "UTF-8");
outStream = conn.getOutputStream();
byte[] buf = new byte[1024];
int len = 0;
int lenCount = 0;
while ((len = bin.read(buf)) != -1) {
outStream.write(buf, 0, len);//OK
lenCount = lenCount + len;
}
int responseCode = conn.getResponseCode();
if (responseCode == 200) {
InputStream inStream = conn.getInputStream();
byte[] data1 = readAsByteArr(inStream);
String json = new String(data1);
inStream.close();
return json;
} else {
InputStream inStream = conn.getInputStream();
byte[] data1 = readAsByteArr(inStream);
String json = new String(data1);
inStream.close();
return json;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (outStream != null) {
outStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
private static String sign(String baseurl) throws UnsupportedEncodingException {
long currebttime = System.currentTimeMillis();
long timeStamp = currebttime / 1000;
String data = "ActionName=UpLoadImage" + "&SecretKey=4b19f08dbf0adb82ce9cc7c207ec1dc9"
+ "&TimeStamp=" + timeStamp;
String signature = hmac_sha1("4b19f08dbf0adb82ce9cc7c207ec1dc9",
URLEncoder.encode(data, "UTF-8"));
signature = signature.replace("%3D", "%3d");
signature = signature.replace("%3A", "%3a");
signature = signature.replace("%2F", "%2f");
return baseurl + data + "&Signature=" + signature;
}
private static String signRadio(String url) throws Exception {
long currebttime = System.currentTimeMillis();
String data = "secretKey=f1b79c865c424be46183a2f0a49a0f15"
+ "&timeStamp=" + currebttime;
System.out.println("url:" + url + data);
System.out.println("url = " + URLEncoder.encode(url + data, "utf-8"));
String signature = HmacSha1Util.getSignature(URLEncoder.encode(url + data, "utf-8"), "f1b79c865c424be46183a2f0a49a0f15");
return url + data + "&signature=" + signature;
}
private static String hmac_sha1(String key, String datas) {
String reString = "";
try {
datas = datas.replace("%3A", "%3a");
datas = datas.replace("%2F", "%2f");
datas = datas.replace("%3D", "%3d");
byte[] data = key.getBytes("UTF-8");
// 依據給定的字節數組結構一個密鑰,第二參數指定一個密鑰算法的稱號
SecretKey secretKey = new SecretKeySpec(data, "HmacSHA1");
// 生成一個指定 Mac 算法 的 Mac 對象
Mac mac = Mac.getInstance("HmacSHA1");
// 用給定密鑰初始化 Mac 對象
mac.init(secretKey);
byte[] text = datas.getBytes("UTF-8");
// 完成 Mac 操作
byte[] text1 = mac.doFinal(text);
reString = new BASE64Encoder().encodeBuffer(text1);
reString = URLEncoder.encode(reString, "UTF-8");
reString = reString.replace("%0A", "");
reString = reString.replace("%0D", "");
} catch (Exception e) {
e.printStackTrace();
}
return reString;
}
/**
* 上傳裁剪圖片
* zxiao 2016/09/01
*
* @param fileID
*/
public static String submitCutedWebImage(MultipartFile file,String fileID,String x,String y,String w,String h) throws UnsupportedEncodingException {
String FileId=fileID;
String[] CropWidths=new String[]{"50"};//裁剪寬度
//List<String> list=new List<String>();
//List<String> list = new ArrayList<String>(5);
ArrayList<String> listCropWidths = new ArrayList<String>();
listCropWidths.add("400");
// String[] CropHeights=new String[]{"50"};//裁剪高度
ArrayList<String> listCropHeights = new ArrayList<String>();
listCropHeights.add("300");
int CropX=Integer.parseInt(x);//裁剪x坐標
int CropY=Integer.parseInt(y);//裁剪y坐標
// String[] CropFixs=new String[]{"l"};//裁剪圖片的標示聚集
ArrayList<String> listCropFixs = new ArrayList<String>();
listCropFixs.add("l");
String SourceSuffix="jpg";//底圖後綴
String SourceFix="";//底圖標示
/* boolean isReSuffix = true;
int height = 1000;
int width = 750;
String mark = "t";
String mode = "W";*/
String url = sign(CROPURL) + "FileId="
+ fileID
+ "&CropWidths="
+ listCropWidths
+ "&CropHeights="
+ listCropHeights
+ "&CropX="
+ CropX
+ "&CropY="
+ CropY + "&CropFixs=" + listCropFixs + "&SourceSuffix=" + SourceSuffix+ "&SourceFix=" + SourceFix;
System.out.println("url:" + url);
HttpURLConnection conn = null;
OutputStream outStream = null;
BufferedInputStream bin = null;
try {
bin = new BufferedInputStream(file.getInputStream());
conn = (HttpURLConnection) new URL(url)
.openConnection();
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setDoOutput(true);
// conn.setFixedLengthStreamingMode(file.length());
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", file.getSize()
+ "");
// conn.setRequestProperty("Range", "bytes="+"");
// 設置 HttpURLConnection的字符編碼
conn.setRequestProperty("Accept-Charset", "UTF-8");
outStream = conn.getOutputStream();
byte[] buf = new byte[1024];
int len = 0;
int lenCount = 0;
while ((len = bin.read(buf)) != -1) {
outStream.write(buf, 0, len);//OK
lenCount = lenCount + len;
}
int responseCode = conn.getResponseCode();
if (responseCode == 200) {
InputStream inStream = conn.getInputStream();
byte[] data1 = readAsByteArr(inStream);
String json = new String(data1);
inStream.close();
return json;
} else {
InputStream inStream = conn.getInputStream();
byte[] data1 = readAsByteArr(inStream);
String json = new String(data1);
inStream.close();
return json;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (outStream != null) {
outStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
/**上傳裁剪後圖片 需在當地保留正本
*zxiao 2016/09/01
* @param ，
* @param x
* @param y
* @param w
* @param h
* @return
* @throws IOException
*/
public static String submitCropImage(MultipartFile file,Integer x,Integer y,Integer w,Integer h) throws IOException {
String folder=System.getProperty("java.io.tmpdir");
File tempDir =new File(folder);
//假如文件夾不存在則創立
if (!tempDir .exists() && !tempDir .isDirectory())
{
// System.out.println("//不存在");
tempDir .mkdir();
}
//緊縮後暫時文件
String Srcpath=folder+"scaleTemp.jpg";
//獲得文件的後綴
/*File uploadFile = new File(Srcpath);
InputStream inputStream = file.getInputStream();
FileInputStream fs= (FileInputStream) inputStream;
String srcImg = URLEncoder.encode(file.getOriginalFilename(), "UTF-8");
String suffix=srcImg.substring(srcImg.lastIndexOf(".")+1);*/
//裁剪圖片
cutImgUtils o = new cutImgUtils(x,y,w,h);
o.setSrcpath(Srcpath);
o.setSubpath(folder+"uptemp.jpg");
File tempFile = o.cut("jpg");
String s = submitImage(tempFile);
return s;
}
/**
* 獲得上傳圖片的寬
* zxiao 2016/09/09
* @param file
* @return
*/
public static int getImgWidth(MultipartFile file) throws IOException {
InputStream is = null;
BufferedImage src = null;
int ret = -1;
try {
is = file.getInputStream();
src = javax.imageio.ImageIO.read(is);
ret = src.getWidth(null); // 獲得源圖寬
is.close();
} catch (Exception e) {
e.printStackTrace();
}
return ret;
}
/**
* 獲得上傳圖片的高
* zxiao 2016/09/09
* @param file
* @return
*/
public static int getImgHeight(MultipartFile file) {
InputStream is = null;
BufferedImage src = null;
int ret = -1;
try {
is = file.getInputStream();
src = javax.imageio.ImageIO.read(is);
ret = src.getHeight(null); // 獲得源圖高
is.close();
} catch (Exception e) {
e.printStackTrace();
}
return ret;
}
/**
* 縮放圖象（按高度和寬度縮放）
* @param file 文件對象
* @param result 縮放後的圖象地址
* @param height 縮放後的高度
* @param width 縮放後的寬度
* @param bb 比例纰謬時能否須要補白：true為補白; false為不補白;
*/
public static void scale(MultipartFile file, String result, int height, int width, boolean bb) {
try {
double ratio = 0.0; // 縮放比例
/*CommonsMultipartFile cf= (CommonsMultipartFile)file;
DiskFileItem fi = (DiskFileItem)cf.getFileItem();
File f = fi.getStoreLocation();*/
// File f = new File(srcImageFile);
InputStream inputStream = file.getInputStream();
BufferedImage bi = ImageIO.read(inputStream);
Image itemp = bi.getScaledInstance(width, height, bi.SCALE_SMOOTH);
// 盤算比例
if ((bi.getHeight() > height) || (bi.getWidth() > width)) {
if (bi.getHeight() > bi.getWidth()) {
ratio = (new Integer(height)).doubleValue()
/ bi.getHeight();
} else {
ratio = (new Integer(width)).doubleValue() / bi.getWidth();
}
AffineTransformOp op = new AffineTransformOp(AffineTransform
.getScaleInstance(ratio, ratio), null);
itemp = op.filter(bi, null);
}
if (bb) {//補白
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
g.setColor(Color.white);
g.fillRect(0, 0, width, height);
if (width == itemp.getWidth(null))
g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2,
itemp.getWidth(null), itemp.getHeight(null),
Color.white, null);
else
g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0,
itemp.getWidth(null), itemp.getHeight(null),
Color.white, null);
g.dispose();
itemp = image;
}
ImageIO.write((BufferedImage) itemp, "jpg", new File(result));
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
try {
/* File file = new File("E:\\bole\\doc\\辦事接口文檔\\伯樂辦事接口解釋v1.0.docx");
System.out.println("file = " + file);
String json = submitFile(file);
System.out.println("json = " + json);*/
} catch (Exception e) {
e.printStackTrace();
}
}
}
圖片裁剪對象類
package com.shengya.service.utils;
import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Iterator;
/**
* Created by Administrator on 2016/9/1.
*/
public class cutImgUtils {
// ===源圖片途徑稱號如：c:\1.jpg
private String srcpath;
// ===剪切圖片寄存途徑稱號。如：c:\2.jpg
private String subpath;
public void setSrcpath(String srcpath) {
this.srcpath = srcpath;
}
public void setSubpath(String subpath) {
this.subpath = subpath;
}
// ===剪切點x坐標
private int x;
private int y;
// ===剪切點寬度
private int width;
private int height;
public cutImgUtils() {
}
public cutImgUtils(int x, int y, int width, int height) {
if(x<0){
x=0;
}else{
this.x = x;
}
if(y<0){
y=0;
}else{
this.y = y;
}
this.width = width;
this.height = height;
}
/**
*
* 對圖片裁剪，並把裁剪垮台新圖片保留 。
*/
public File cut() throws IOException {
FileInputStream is = null;
ImageInputStream iis = null;
try {
// 讀取圖片文件
is = new FileInputStream(srcpath);
/**
*
* 前往包括一切以後已注冊 ImageReader 的 Iterator，這些 ImageReader
*
* 宣稱可以或許解碼指定格局。 參數：formatName - 包括非正式格局稱號 .
*
* (例如 "jpeg" 或 "tiff")等 。
*/
Iterator<ImageReader> it = ImageIO
.getImageReadersByFormatName("jpg");
ImageReader reader = it.next();
// 獲得圖片流
iis = ImageIO.createImageInputStream(is);
/**
*
* <p>
* iis:讀取源。true:只向前搜刮
* </p>
* .將它標志為 ‘只向前搜刮'。
*
* 此設置意味著包括在輸出源中的圖象將只按次序讀取，能夠許可 reader
*
* 防止緩存包括與之前曾經讀取的圖象聯系關系的數據的那些輸出部門。
*/
reader.setInput(iis, true);
/**
*
* <p>
* 描寫若何對流停止解碼的類
* <p>
* .用於指定若何在輸出時從 Java Image I/O
*
* 框架的高低文中的流轉換一幅圖象或一組圖象。用於特定圖象格局的插件
*
* 將從其 ImageReader 完成的 getDefaultReadParam 辦法中前往
*
* ImageReadParam 的實例。
*/
ImageReadParam param = reader.getDefaultReadParam();
/**
*
* 圖片裁剪區域。Rectangle 指定了坐標空間中的一個區域，經由過程 Rectangle 對象
*
* 的左上極點的坐標(x，y)、寬度和高度可以界說這個區域。
*/
Rectangle rect = new Rectangle(x, y, width, height);
// 供給一個 BufferedImage，將其用作解碼像素數據的目的。
param.setSourceRegion(rect);
/**
*
* 應用所供給的 ImageReadParam 讀取經由過程索引 imageIndex 指定的對象，並將
*
* 它作為一個完全的 BufferedImage 前往。
*/
BufferedImage bi = reader.read(0, param);
// 保留新圖片
ImageIO.write(bi, "jpg", new File(subpath));
File file = new File("subpath");
return file;
} finally {
if (is != null)
is.close();
if (iis != null)
iis.close();
}
}
public File cut(String suffix) throws IOException {
FileInputStream is = null;
ImageInputStream iis = null;
try {
// 讀取圖片文件
is = new FileInputStream(srcpath);
// is = inputStream;
/**
*
* 前往包括一切以後已注冊 ImageReader 的 Iterator，這些 ImageReader
*
* 宣稱可以或許解碼指定格局。 參數：formatName - 包括非正式格局稱號 .
*
* (例如 "jpeg" 或 "tiff")等 。
* Iterator<ImageReader> it = ImageIO.getImageReadersByFormatName("jpg");
*/
String suffixName=null;
if(suffix.equals("gif")){
suffixName="gif";
}else if(suffix.equals("png")){
suffixName="png";
} else{
suffixName="jpg";
}
Iterator<ImageReader> it = ImageIO
.getImageReadersByFormatName(suffixName);
ImageReader reader = it.next();
// 獲得圖片流
iis = ImageIO.createImageInputStream(is);
/**
*
* <p>
* iis:讀取源。true:只向前搜刮
* </p>
* .將它標志為 ‘只向前搜刮'。
*
* 此設置意味著包括在輸出源中的圖象將只按次序讀取，能夠許可 reader
*
* 防止緩存包括與之前曾經讀取的圖象聯系關系的數據的那些輸出部門。
*/
reader.setInput(iis, true);
/**
*
* <p>
* 描寫若何對流停止解碼的類
* <p>
* .用於指定若何在輸出時從 Java Image I/O
*
* 框架的高低文中的流轉換一幅圖象或一組圖象。用於特定圖象格局的插件
*
* 將從其 ImageReader 完成的 getDefaultReadParam 辦法中前往
*
* ImageReadParam 的實例。
*/
ImageReadParam param = reader.getDefaultReadParam();
/**
*
* 圖片裁剪區域。Rectangle 指定了坐標空間中的一個區域，經由過程 Rectangle 對象
*
* 的左上極點的坐標(x，y)、寬度和高度可以界說這個區域。
*/
Rectangle rect = new Rectangle(x, y, width, height);
// 供給一個 BufferedImage，將其用作解碼像素數據的目的。
param.setSourceRegion(rect);
/**
*
* 應用所供給的 ImageReadParam 讀取經由過程索引 imageIndex 指定的對象，並將
*
* 它作為一個完全的 BufferedImage 前往。
*/
BufferedImage bi = reader.read(0, param);
// 保留新圖片
ImageIO.write(bi, "jpg", new File(subpath));
File file = new File(subpath);
return file;
} finally {
if (is != null)
is.close();
if (iis != null)
iis.close();
}
}
}
碰到的成績總結：
-裁剪圖片產生偏移景象
處理方法：應用緊縮後的圖片等比例搜集裁切坐標信息
-MultipartFile 和 File之間互相轉化
第一種辦法：
MultipartFile file = xxx;
CommonsMultipartFile cf= (CommonsMultipartFile)file;
DiskFileItem fi = (DiskFileItem)cf.getFileItem();
File f = fi.getStoreLocation();
會在項目標根目次的暫時文件夾下生成一個文件；
第二種辦法：
transferTo(File dest)；
會在項目中生成一個新文件；
第三種辦法：
File f = (File) xxx 強轉便可。條件是要設置裝備擺設multipartResolver，要否則會報類型轉換掉敗的異常。
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="104857600"/>
<property name="maxInMemorySize" value="4096"/>
</bean>
沒試過；
第四種辦法：
Workbook wb = Workbook.getWorkbook(xxx .getInputStream());
轉換為輸出流，直接讀取；
第五種辦法：
byte[] buffer = myfile.getBytes();
先轉換為字節數組，沒試過；
第六種辦法：
直接轉成輸出流
MultipartFile file=xxx; is = file.getInputStream(); src = javax.imageio.ImageIO.read(is); ret = src.getWidth(null); // 獲得源圖寬
參考材料：
jcop api：http://code.ciaoca.com/jquery/jcrop/.
以上就是本文的全體內容，願望對年夜家的進修有所贊助，也願望年夜家多多支撐。
