JavaWeb實現(xiàn)裁剪圖片上傳完整代碼
更新時間：2016年09月13日 14:09:44 作者：qq_35661734
這篇文章主要為大家詳細介紹了javaWeb實現(xiàn)裁剪圖片上傳完整代碼,具有一定的參考價值，感興趣的小伙伴們可以參考一下
本文實例為大家分享了JavaWeb實現(xiàn)裁剪圖片上傳完整案例，供大家參考，具體內(nèi)容如下
實現(xiàn)思路
•使用jcrop插件手機要裁剪圖片的坐標
•將收集到的參數(shù)傳遞到后臺，在后臺使用java圖形對象繪制圖像進行裁剪
◦后臺處理流程：
1、將上傳的圖片按按照比例進行壓縮后上傳到文件服務(wù)器，并且將壓縮后的圖片保存在本地臨時目錄中。
2、將壓縮后的圖片回顯到頁面，使用jcrop進行裁剪，手機裁剪坐標（x,y,width,height）
■@paramx 目標切片起點坐標X
■@param y 目標切片起點坐標Y
■@param width 目標切片寬度
■@param height 目標切片高度
3、后臺處理裁剪裁剪，重新上傳
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" style="margin-left: 75px;">
<a href="javascript:;" id="upText" style="color:red;">上傳頭像</a>
</div>
<p>
支持jpg、png格式<br />
圖片小于2M
</p>
</div>
<!--回顯示圖片-->
<img src="" name="photo" id="originalImg" alt=""/>
</div>
</div>
<p class="up_reload" id="up_reload" style="display: none;">
<a href="javascript:;" style="color: red">重新上傳</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" style="width: 300px; height: 230px; border: solid 1px #ccc; overflow: hidden;">
<img id="preview_1" src="${pageContext.request.contextPath}/images/4-3.jpg"/>
</div>
<p>
400 x 300像素
</p>
<%--<div class="upload_view_pic" style="width: 80px; height: 80px; border: solid 1px #ccc; overflow: hidden;">
<img id="preview_2" src=${pageContext.request.contextPath}/images/4-3.jpg />
</div>
<p>
80 x 80像素
</p>--%>
<p>
拖拽或縮放，生成自己滿意的頭像
</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:;" style="color: red">保存頭像</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?qū)挾?
photos.JcorpHeight = 300;//裁剪框選擇高度
// photos.Widths = ["200", "80"];// 圖片大小“寬”數(shù)組，根據(jù)圖片張數(shù)由大到小定義不同圖片的寬度
// photos.Heights = ["200", "80"];// 圖片大小“高”數(shù)組，根據(jù)圖片張數(shù)由大到小定義不同圖片的高度
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";//提示文本ID
photos.UpLoad_AlertClassName = "error";//提示文本增加的樣式
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";//重新上傳組件ID
photos.UpLoad_PicValueID = "picval";//上傳的底圖片內(nèi)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";//本頁面重新上傳時的原圖片內(nèi)容ID
photos.UpLoad_OriginValueID = "origpicval";//其他頁面進入時的原圖片內(nèi)容ID
photos.Upload_RollbarID = "pic2";//自定義滾動條ID
photos.UpLoad_SaveID = "saveImage";//圖片保存按鈕ID
photos.UpLoad_PreviewPreFix = "preview_";//多個不同尺寸小圖的ID前綴名稱，多個小圖ID格式“前綴”+數(shù)字編號（從1開始），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 = "抱歉，暫只支持 jpg、png、bmp 格式";//圖片格式驗證文本
/* photos.UpText_Size = "抱歉，圖片大小不能超過2M";*///圖片大小驗證文本
/*photos.UpText_Error = "圖片上傳出錯";//上傳出錯文本*/
photos.Url_Check = "/Enterprise/filescheck";//文件驗證大小的地址
photos.Url_UpLoad = "/Enterprise/uploadphoto?up=original";//上傳圖片載入底圖的地址
photos.Url_ReLoad = "";//重新上傳的地址
photos.Url_Save = "/Enterprise/saveimg?up=save";//保存圖片的地址
</script>
</html>
后臺java代碼
圖片上傳工具類
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(shè)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(shè)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(shè)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(shè)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");
// 根據(jù)給定的字節(jié)數(shù)組構(gòu)造一個密鑰,第二參數(shù)指定一個密鑰算法的名稱
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"};//裁剪圖片的標示集合
ArrayList<String> listCropFixs = new ArrayList<String>();
listCropFixs.add("l");
String SourceSuffix="jpg";//底圖后綴
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(shè)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;
}
/**上傳裁剪后圖片 需在本地保存副本
*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);
//如果文件夾不存在則創(chuàng)建
if (!tempDir .exists() && !tempDir .isDirectory())
{
// System.out.println("http://不存在");
tempDir .mkdir();
}
//壓縮后臨時文件
String Srcpath=folder+"scaleTemp.jpg";
//獲取文件的后綴
/*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;
}
/**
* 獲取上傳圖片的寬
* 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); // 得到源圖寬
is.close();
} catch (Exception e) {
e.printStackTrace();
}
return ret;
}
/**
* 獲取上傳圖片的高
* 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); // 得到源圖高
is.close();
} catch (Exception e) {
e.printStackTrace();
}
return ret;
}
/**
* 縮放圖像（按高度和寬度縮放）
* @param file 文件對象
* @param result 縮放后的圖像地址
* @param height 縮放后的高度
* @param width 縮放后的寬度
* @param bb 比例不對時是否需要補白：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);
// 計算比例
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\\服務(wù)接口文檔\\伯樂服務(wù)接口說明v1.0.docx");
System.out.println("file = " + file);
String json = submitFile(file);
System.out.println("json = " + json);*/
} catch (Exception e) {
e.printStackTrace();
}
}
}
圖片裁剪工具類
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 {
// ===源圖片路徑名稱如：c:\1.jpg
private String srcpath;
// ===剪切圖片存放路徑名稱。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，并把裁剪完蛋新圖片保存 。
*/
public File cut() throws IOException {
FileInputStream is = null;
ImageInputStream iis = null;
try {
// 讀取圖片文件
is = new FileInputStream(srcpath);
/**
*
* 返回包含所有當前已注冊 ImageReader 的 Iterator，這些 ImageReader
*
* 聲稱能夠解碼指定格式。 參數(shù)：formatName - 包含非正式格式名稱 .
*
* (例如 "jpeg" 或 "tiff")等 。
*/
Iterator<ImageReader> it = ImageIO
.getImageReadersByFormatName("jpg");
ImageReader reader = it.next();
// 獲取圖片流
iis = ImageIO.createImageInputStream(is);
/**
*
* <p>
* iis:讀取源。true:只向前搜索
* </p>
* .將它標記為 ‘只向前搜索'。
*
* 此設(shè)置意味著包含在輸入源中的圖像將只按順序讀取，可能允許 reader
*
* 避免緩存包含與以前已經(jīng)讀取的圖像關(guān)聯(lián)的數(shù)據(jù)的那些輸入部分。
*/
reader.setInput(iis, true);
/**
*
* <p>
* 描述如何對流進行解碼的類
* <p>
* .用于指定如何在輸入時從 Java Image I/O
*
* 框架的上下文中的流轉(zhuǎn)換一幅圖像或一組圖像。用于特定圖像格式的插件
*
* 將從其 ImageReader 實現(xiàn)的 getDefaultReadParam 方法中返回
*
* ImageReadParam 的實例。
*/
ImageReadParam param = reader.getDefaultReadParam();
/**
*
* 圖片裁剪區(qū)域。Rectangle 指定了坐標空間中的一個區(qū)域，通過 Rectangle 對象
*
* 的左上頂點的坐標(x，y)、寬度和高度可以定義這個區(qū)域。
*/
Rectangle rect = new Rectangle(x, y, width, height);
// 提供一個 BufferedImage，將其用作解碼像素數(shù)據(jù)的目標。
param.setSourceRegion(rect);
/**
*
* 使用所提供的 ImageReadParam 讀取通過索引 imageIndex 指定的對象，并將
*
* 它作為一個完整的 BufferedImage 返回。
*/
BufferedImage bi = reader.read(0, param);
// 保存新圖片
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;
/**
*
* 返回包含所有當前已注冊 ImageReader 的 Iterator，這些 ImageReader
*
* 聲稱能夠解碼指定格式。 參數(shù)：formatName - 包含非正式格式名稱 .
*
* (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();
// 獲取圖片流
iis = ImageIO.createImageInputStream(is);
/**
*
* <p>
* iis:讀取源。true:只向前搜索
* </p>
* .將它標記為 ‘只向前搜索'。
*
* 此設(shè)置意味著包含在輸入源中的圖像將只按順序讀取，可能允許 reader
*
* 避免緩存包含與以前已經(jīng)讀取的圖像關(guān)聯(lián)的數(shù)據(jù)的那些輸入部分。
*/
reader.setInput(iis, true);
/**
*
* <p>
* 描述如何對流進行解碼的類
* <p>
* .用于指定如何在輸入時從 Java Image I/O
*
* 框架的上下文中的流轉(zhuǎn)換一幅圖像或一組圖像。用于特定圖像格式的插件
*
* 將從其 ImageReader 實現(xiàn)的 getDefaultReadParam 方法中返回
*
* ImageReadParam 的實例。
*/
ImageReadParam param = reader.getDefaultReadParam();
/**
*
* 圖片裁剪區(qū)域。Rectangle 指定了坐標空間中的一個區(qū)域，通過 Rectangle 對象
*
* 的左上頂點的坐標(x，y)、寬度和高度可以定義這個區(qū)域。
*/
Rectangle rect = new Rectangle(x, y, width, height);
// 提供一個 BufferedImage，將其用作解碼像素數(shù)據(jù)的目標。
param.setSourceRegion(rect);
/**
*
* 使用所提供的 ImageReadParam 讀取通過索引 imageIndex 指定的對象，并將
*
* 它作為一個完整的 BufferedImage 返回。
*/
BufferedImage bi = reader.read(0, param);
// 保存新圖片
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();
}
}
}
遇到的問題總結(jié)：
-裁剪圖片發(fā)生偏移現(xiàn)象
解決辦法：使用壓縮后的圖片等比例收集裁切坐標信息
-MultipartFile 和 File之間相互轉(zhuǎn)化
第一種方法：
MultipartFile file = xxx;
CommonsMultipartFile cf= (CommonsMultipartFile)file;
DiskFileItem fi = (DiskFileItem)cf.getFileItem();
File f = fi.getStoreLocation();
會在項目的根目錄的臨時文件夾下生成一個文件；
第二種方法：
transferTo(File dest)；
會在項目中生成一個新文件；
第三種方法：
File f = (File) xxx 強轉(zhuǎn)即可。前提是要配置multipartResolver，要不然會報類型轉(zhuǎn)換失敗的異常。
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="104857600"/>
<property name="maxInMemorySize" value="4096"/>
</bean>
沒試過；
第四種方法：
Workbook wb = Workbook.getWorkbook(xxx .getInputStream());
轉(zhuǎn)換為輸入流，直接讀??；
第五種方法：
byte[] buffer = myfile.getBytes();
先轉(zhuǎn)換為字節(jié)數(shù)組，沒試過；
第六種方法：
直接轉(zhuǎn)成輸入流
MultipartFile file=xxx; is = file.getInputStream(); src = javax.imageio.ImageIO.read(is); ret = src.getWidth(null); // 得到源圖寬
參考資料：
jcop api：http://code.ciaoca.com/jquery/jcrop/.
以上就是本文的全部內(nèi)容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。
相關(guān)文章
這篇文章主要介紹了Java實現(xiàn)批量修改txt文件名稱的方法,結(jié)合實例形式分析了Java針對目錄文件遍歷及文件讀寫、屬性操作等相關(guān)實現(xiàn)技巧,需要的朋友可以參考下2019-03-03
攔截器在我們平時的項目中用處有很多,如：日志記錄（我們后續(xù)章節(jié)會講到）、用戶登錄狀態(tài)攔截、安全攔截等等,所以下面這篇文章主要給大家介紹了關(guān)于SpringBoot攔截器以及源碼的相關(guān)資料,需要的朋友可以參考下2021-07-07
springboot斷言異常封裝與統(tǒng)一異常處理實現(xiàn)代碼
異常處理其實一直都是項目開發(fā)中的大頭,但關(guān)注異常處理的人一直都特別少,下面這篇文章主要給大家介紹了關(guān)于springboot斷言異常封裝與統(tǒng)一異常處理的相關(guān)資料,需要的朋友可以參考下2023-01-01
這篇文章主要為大家詳細介紹了maven搭建java ee項目圖文教程，感興趣的小伙伴們可以參考一下2016-04-04
Java 遞歸遍歷實現(xiàn)linux tree命令方式
這篇文章主要介紹了Java 遞歸遍歷實現(xiàn)linux tree命令方式，具有很好的參考價值，希望對大家有所幫助。如有錯誤或未考慮完全的地方，望不吝賜教2021-09-09
我計劃在接下來的幾篇文章中快速回顧一下Java，主要是一些基礎(chǔ)的JDK相關(guān)的內(nèi)容2013-05-05
這篇文章主要為大家詳細介紹了java實現(xiàn)批量生成二維碼的相關(guān)代碼，具有一定的參考價值，感興趣的小伙伴們可以參考一下2019-05-05
這篇文章主要介紹了Java注解詳細介紹,本文講解了Java注解是什么、Java注解基礎(chǔ)知識、Java注解類型、定義Java注解類型的注意事項等內(nèi)容,需要的朋友可以參考下2014-09-09
這篇文章主要介紹了Java獲取服務(wù)器IP及端口的方法,結(jié)合實例形式分析了java針對客戶端及服務(wù)器端各種常見的信息操作技巧與注意事項,需要的朋友可以參考下2018-12-12
如何將Spring Session存儲到Redis中實現(xiàn)持久化
這篇文章主要介紹了如何將Spring Session存儲到Redis中實現(xiàn)持久化,本文通過實例代碼給大家介紹的非常詳細，對大家的學習或工作具有一定的參考借鑒價值，需要的朋友可以參考下2023-07-07