文件上传的几种方式
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SpringMVC+Jcrop截图插件+ajaxFileUpload
项目搭建
- Maven包导入
<!-- J2EE 包 --> <dependency> <groupId>javax</groupId> <artifactId>javaee-api</artifactId> <version>7.0</version> </dependency> <!-- Spring MVC 核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.2.3.RELEASE</version> </dependency> <!-- 上传组件包 --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.9</version> </dependency> <!-- json --> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.7</version> </dependency> <!-- json lang --> <dependency> <groupId>commons-lang</groupId> <artifactId>commons-lang</artifactId> <version>2.6</version> </dependency>- 配置文件
总共有2个配置文件：springMVC.xml， system.properties
springMVC.xml----------<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!-- 组件扫描 --> <context:component-scan base-package="com.liujianhome.controller"/> <!-- 开启注解 --> <mvc:annotation-driven/> <!-- 静态资源处理 --> <mvc:resources mapping="/css/**" location="/css/"/> <mvc:resources mapping="/images/**" location="/image/"/> <mvc:resources mapping="/js/**" location="/js/"/> <mvc:default-servlet-handler/> <!-- 配置文件上传，如果没有使用文件上传可以不用配置，当然如果不配，那么配置文件中也不必引入上传组件包 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 默认编码 --> <property name="defaultEncoding" value="utf-8"/> <!-- 文件大小最大值 --> <property name="maxUploadSize" value="10485760000"/> <!-- 内存中的最大值 --> <property name="maxInMemorySize" value="40960"/> </bean></beans>system.properties----------file.path = /uploadfile/yrfh/userroot.file.path = E:/workspace/test/JcropDemo/target/Jcrop/- 核心代码
html页面：
<%@ page contentType="text/html;charset=UTF-8" language="java" %><% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";%><html lang="en"><head> <base href="<%=basePath%>"> <title>Jcrop Demo</title> <meta http-equiv="Content-type" content="text/html;charset=UTF-8"/> <script src="js/jquery.min.js"></script> <script src="js/jquery.Jcrop.js"></script> <script src="js/ajaxfileupload.js"></script> <link rel="stylesheet" href="css/jquery.Jcrop.css" type="text/css"/> <script type="text/javascript"> var jcrop_api; jQuery(function ($) { // Create variables (in this scope) to hold the API and image size var boundx, boundy, // Grab some information about the preview pane $preview = $('#preview-pane'), $pcnt = $('#preview-pane .preview-container'), $pimg = $('#preview-pane .preview-container img'), xsize = $pcnt.width(), ysize = $pcnt.height(); $('#target').Jcrop({ onChange: updatePreview, // 选框改变时的事件 onSelect: updatePreview, // 选框选定时的事件 onRelease: clearCoords, // 取消选框时的事件 boxWidth: 400, aspectRatio: 200 / 200 }, function () { // Use the API to get the real image size var bounds = this.getBounds(); boundx = bounds[0]; boundy = bounds[1]; // Store the API in the jcrop_api variable jcrop_api = this; // Move the preview into the jcrop container for css positioning $preview.appendTo(jcrop_api.ui.holder); }); function updatePreview(c) { if (parseInt(c.w) > 0) { var rx = xsize / c.w; var ry = ysize / c.h; $pimg.css({ width: Math.round(rx * boundx) + 'px', height: Math.round(ry * boundy) + 'px', marginLeft: '-' + Math.round(rx * c.x) + 'px', marginTop: '-' + Math.round(ry * c.y) + 'px' }); } $('#x1').val(c.x); $('#y1').val(c.y); $('#x2').val(c.x2); $('#y2').val(c.y2); $('#w').val(c.w); $('#h').val(c.h); }; }); function clearCoords() { $('#coords input[type=text]').val(''); } ; function cutImg() { // 提交裁剪图片 $.ajax({ type: "post", url: "/doCutImg", data: { "x": parseInt($("#x1").val()), "y": parseInt($("#y1").val()), "w": parseInt($("#w").val()), "h": parseInt($("#h").val()), "oldImg": $("#oldImg").val() }, async: false, success: function (data) { var jsonObj = eval("(" + data + ")"); if (jsonObj.status == 1) { $("#cutImg").attr("src", jsonObj.path+"?t="+Math.random()); } else { alert("图片上传失败!"); } } }); } function ajaxUpFile() { $.ajaxFileUpload ( { url: '/ajaxFileUpload', //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: "ajaxFileId", //文件上传域的ID dataType: 'json', //返回值类型 一般设置为json data: {'format': 'gif,jpg,jpeg,png,bmp'},// data: {'format': 'gif,bmp'}, success: function (data, status) //服务器成功响应处理函数 { if(data[0].status == 1) { $("#ajaxUpFileImg").attr("src", data[0].path); }else{ alert(data[0].message); } }, error: function (data, status, e)// 服务器响应失败处理函数 { alert(data + "-" + e + "-" + status); } } ) } </script> <style type="text/css"> /* Apply these styles only when #preview-pane has been placed within the Jcrop widget */ .jcrop-holder #preview-pane { display: block; position: absolute; z-index: 2000; top: 10px; right: -280px; padding: 6px; border: 1px rgba(0, 0, 0, .4) solid; background-color: white; -webkit-border-radius: 6px; -moz-border-radius: 6px; border-radius: 6px; -webkit-box-shadow: 1px 1px 5px 2px rgba(0, 0, 0, 0.2); -moz-box-shadow: 1px 1px 5px 2px rgba(0, 0, 0, 0.2); box-shadow: 1px 1px 5px 2px rgba(0, 0, 0, 0.2); } /* The Javascript code will set the aspect ratio of the crop area based on the size of the thumbnail preview, specified here */ #preview-pane .preview-container { width: 250px; height: 250px; overflow: hidden; } </style></head><body><img src="/image/1111.jpg" id="target" alt="[Jcrop Example]"/><div id="preview-pane"> <div class="preview-container"> <img src="/image/1111.jpg" id="" class="jcrop-preview" alt="Preview"/> </div></div><form id="coords" method="post" class="coords" action=""> <div class="inline-labels"> <label>X1 <input type="text" size="4" id="x1" name="x1"/></label> <label>Y1 <input type="text" size="4" id="y1" name="y1"/></label> <label>X2 <input type="text" size="4" id="x2" name="x2"/></label> <label>Y2 <input type="text" size="4" id="y2" name="y2"/></label> <label>W <input type="text" size="4" id="w" name="w"/></label> <label>H <input type="text" size="4" id="h" name="h"/></label> <input type="hidden" id="oldImg" value="/image/1111.jpg" name="oldImg"/> </div> <input type="button" onclick="cutImg()" value="上传截图"/></form><hr><img id="cutImg"><hr><h1>提交Form文件上传Demo</h1><form action="/doFileUpload" method="post" enctype="multipart/form-data"> <p><input type="file" name="file" id="file" value="普通文件"/></p> <p><input type="submit" value="普通上传"/></p></form><hr><h1>用ajaxFileUpload上传Demo</h1><p><input type="file" name="ajaxFile" id="ajaxFileId" value="ajax上传文件"/></p><p><input type="button" onclick="ajaxUpFile()" value="ajax上传"/></p><p><img id="ajaxUpFileImg"/></p></body></html>Java 代码
package com.liujianhome.controller;import com.liujianhome.util.*;import org.springframework.stereotype.Controller;import org.springframework.util.MultiValueMap;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.multipart.MultipartHttpServletRequest;import org.springframework.web.multipart.commons.CommonsMultipartFile;import org.springframework.web.multipart.commons.CommonsMultipartResolver;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import java.io.File;import java.io.IOException;import java.util.List;import java.util.Map;/** * ! * * @author liujian * @version 2016/7/1 0001 */@Controllerpublic class JcropController { @RequestMapping("/init") public ModelAndView test() { return new ModelAndView("/result.jsp"); } /** * 上传裁剪图片 * * @param oldImg * @param y * @param x * @param w * @param h * @return */ @RequestMapping(value = "/doCutImg", method = RequestMethod.POST, produces = "text/html;charset=UTF-8") @ResponseBody public String doCutImg(String oldImg, int y, int x, int w, int h, HttpServletRequest request) { FileEntity fileEntity = null; try { fileEntity = FileCommon.saveImage(oldImg, y, x, w, h); if (fileEntity.getStatus() == 1) { return JsonUtils.toJsonString(fileEntity); } } catch (Exception e) { e.printStackTrace(); } return JsonUtils.toJsonString(fileEntity); } @RequestMapping(value = "/ajaxFileUpload", method = RequestMethod.POST, produces = "text/html;charset=UTF-8") @ResponseBody public String ajaxFileUpload(HttpServletRequest request, String format) { List<FileEntity> resultList = FileCommon.doSuperUpFile(request, format); String resultJson = JsonUtils.toJsonString(resultList); return resultJson; } @RequestMapping(value = "/doFileUpload", method = RequestMethod.POST, produces = "text/html;charset=UTF-8") public String doFileUpload(HttpServletRequest request) { List<FileEntity> resultList = FileCommon.doSuperUpFile(request, null); return "redirect:/init"; }}几个Util包
package com.liujianhome.util;import org.springframework.util.Base64Utils;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.UnsupportedEncodingException;import java.net.URLDecoder;import java.net.URLEncoder;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Random;/** * ! * * @author liujian * @version 2016/6/13 0013 */public class Common { /** * 当前时间格式化! * @param format * @return */ public static String getCurDateFormat(String format) { SimpleDateFormat sdf = new SimpleDateFormat(format); return sdf.format(new Date()); }}package com.liujianhome.util;import org.springframework.util.MultiValueMap;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.multipart.MultipartHttpServletRequest;import org.springframework.web.multipart.commons.CommonsMultipartResolver;import javax.imageio.ImageIO;import javax.servlet.http.HttpServletRequest;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.util.*;/** * 文件上传公共类! * * @author liujian * @version 2016/6/26 0026 */public class FileCommon { /** * 创建文件夹 * * @param dir */ private static void doDir(String dir) { File file = new File(dir); //如果文件夹不存在则创建 if (!file.exists() && !file.isDirectory()) { file.mkdirs(); } } /** * 文件上传，支持单个和多个 * * @param request * @param format 格式规定，例如：gif,jpg,jpeg,png,bmp * @return */ public static List<FileEntity> doSuperUpFile(HttpServletRequest request, String format) { List<FileEntity> resultList = new ArrayList<FileEntity>(); // TODO 本地测试// String rootPath = request.getServletContext().getRealPath("/"); String rootPath = SystemPropertiesUtil.getProperty("root.file.path"); // 定义允许上传的文件扩展名 HashMap<String, String> extMap = new HashMap<String, String>(); extMap.put("format", format); //创建一个通用的多部分解析器 CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext()); //判断 request 是否有文件上传,即多部分请求 if (multipartResolver.isMultipart(request)) { //转换成多部分request MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request; //取得request中的所有文件名 MultiValueMap<String, MultipartFile> iter = multiRequest.getMultiFileMap(); for (Map.Entry<String, List<MultipartFile>> entry : iter.entrySet()) { //记录上传过程起始时的时间，用来计算上传时间 int pre = (int) System.currentTimeMillis(); //取得上传文件 MultipartFile file = multiRequest.getFile(entry.getKey()); if (format != null) { if (!Arrays.<String>asList(extMap.get("format").split(",")) .contains(file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1))) { FileEntity fileEntity = new FileEntity(); fileEntity.setStatus(0); fileEntity.setMessage("上传文件扩展名只允许" + extMap.get("format") + "格式"); resultList.add(fileEntity); return resultList; } } String fileName = FileCommon.doUpFile(rootPath, file); if (!"".equals(fileName)) { FileEntity fileEntity = new FileEntity(); fileEntity.setStatus(1); fileEntity.setMessage("上传成功"); fileEntity.setPath(fileName); resultList.add(fileEntity); } } } return resultList; } /** * 保存图片 * * @param oldImg 原图路径 * @param top 选择框的左边y坐标 * @param left 选择框的左边x坐标 * @param width 选择框宽度 * @param height 选择框高度 * @return * @throws IOException */ public static FileEntity saveImage(String oldImg, int top, int left, int width, int height) throws IOException { String rootFilePath = SystemPropertiesUtil.getProperty("root.file.path"); String newImg = oldImg.substring(0, oldImg.lastIndexOf(".")); String newImgSuf = ImageUtils.getExtension(oldImg).toLowerCase(); String newImgPathNotRoot = newImg + "_cut." + newImgSuf; String newImgPath = rootFilePath + newImgPathNotRoot; String oldImgPath = rootFilePath + oldImg; File fileDest = new File(newImgPath); if (!fileDest.getParentFile().exists()) fileDest.getParentFile().mkdirs(); String ext = ImageUtils.getExtension(newImgPath).toLowerCase(); BufferedImage bi = (BufferedImage) ImageIO.read(new File(oldImgPath)); height = Math.min(height, bi.getHeight()); width = Math.min(width, bi.getWidth()); if (height <= 0) height = bi.getHeight(); if (width <= 0) width = bi.getWidth(); top = Math.min(Math.max(0, top), bi.getHeight() - height); left = Math.min(Math.max(0, left), bi.getWidth() - width); BufferedImage bi_cropper = bi.getSubimage(left, top, width, height); boolean flag = ImageIO.write(bi_cropper, ext, fileDest); if (flag) { FileEntity fileEntity = new FileEntity(); fileEntity.setPath(newImgPathNotRoot); fileEntity.setMessage("上传成功"); fileEntity.setStatus(1); return fileEntity; } else { FileEntity fileEntity = new FileEntity(); fileEntity.setMessage("上传失败"); fileEntity.setStatus(0); return fileEntity; } } /** * 文件上传规则 * * @param rootPath * @param file * @return */ private static String doUpFile(String rootPath, MultipartFile file) { if (file != null) { //取得当前上传文件的文件名称 String myFileName = file.getOriginalFilename(); //如果名称不为“”,说明该文件存在，否则说明该文件不存在 if (myFileName.trim() != "") { // 该项目的文件路径 String filePath = SystemPropertiesUtil.getProperty("file.path"); // 文件的相对路径 String relativeFilePath = filePath + "/" + Common.getCurDateFormat("yyyyMMdd"); // 文件的绝对路径 String absoluteFilePath = rootPath + relativeFilePath; // 创建文件夹 doDir(absoluteFilePath); // 重命名文件名 String fileName = System.currentTimeMillis() + "." + ImageUtils.getExtension(myFileName); // 上传文件绝对路径 String path = absoluteFilePath + "/" + fileName; File localFile = new File(path); try { file.transferTo(localFile); return relativeFilePath + "/" + fileName; } catch (IOException e) { e.printStackTrace(); } } } return ""; }}package com.liujianhome.util;/** * 文件上传返回信息实体! * * @author liujian * @version 2016/7/7 0007 */public class FileEntity { // 文件上传状态 (1:成功, 0:失败) private int status; // 文件上传地址 private String path; // 上传状态消息 private String message; public int getStatus() { return status; } public void setStatus(int status) { this.status = status; } public String getPath() { return path; } public void setPath(String path) { this.path = path; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; }}package com.liujianhome.util;import java.io.File;/** * ! * * @author liujian * @version 2016/6/28 0028 */public class ImageUtils { public static String getExtension(File f) { return (f != null) ? getExtension(f.getName()) : ""; } public static String getExtension(String filename) { return getExtension(filename, ""); } public static String getExtension(String filename, String defExt) { if ((filename != null) && (filename.length() > 0)) { int i = filename.lastIndexOf('.'); if ((i > -1) && (i < (filename.length() - 1))) { return filename.substring(i + 1); } } return defExt; } public static String trimExtension(String filename) { if ((filename != null) && (filename.length() > 0)) { int i = filename.lastIndexOf('.'); if ((i > -1) && (i < (filename.length()))) { return filename.substring(0, i); } } return filename; }}package com.liujianhome.util;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.serializer.SerializeConfig;import com.alibaba.fastjson.serializer.SerializerFeature;import org.apache.commons.lang.StringUtils;import java.util.List;import java.util.Map;public class JsonUtils { // fastjson 的序列化配置 public final static SerializeConfig fastjson_serializeConfig_noYear = new SerializeConfig(); public final static SerializeConfig fastjson_serializeConfig_time = new SerializeConfig(); public final static SerializeConfig fastjson_free_datetime = new SerializeConfig(); // 默认打出所有属性(即使属性值为null)|属性排序输出,为了配合历史记录 private final static SerializerFeature[] fastJsonFeatures = { SerializerFeature.WriteMapNullValue, SerializerFeature.WriteEnumUsingToString, SerializerFeature.SortField }; public static <T> T getValue(String text, String key, Class<T> clazz ) { Map<String, String> map = (Map<String, String>) jsonToMap(text); T result = (T) map.get(key); return result; } public static <T> T parseObject(String item, Class<T> clazz) { if (StringUtils.isBlank(item)) { return null; } return JSON.parseObject(item, clazz); } public static final <T> List<T> parseArray(String text, Class<T> clazz) { if (StringUtils.isBlank(text)) { return null; } return JSON.parseArray(text, clazz); } public static String toJsonString(Object object) { return toJsonString(object, fastjson_serializeConfig_noYear); } public static String toJsonString(Object object, SerializeConfig serializeConfig) { if (null == object) { return ""; } return JSON.toJSONString(object, serializeConfig, fastJsonFeatures); } public static Map<?, ?> jsonToMap(String json) { if (StringUtils.isBlank(json)) { return null; } return (Map<?, ?>) JSON.parse(json); } public static Map<?, ?> objectToMap(Object object) { String json = toJsonString(object); if (StringUtils.isBlank(json)) { return null; } return (Map<?, ?>) JSON.parse(json); } public static String mapToJson(Map<?, ?> params) { if (null == params || params.isEmpty()) { return null; } return JSON.toJSONString(params, true); }}package com.liujianhome.util;import java.io.IOException;import java.io.InputStream;import java.util.Properties;/** * ! * * @author liujian * @version 2016/5/23 0023 */public class SystemPropertiesUtil { static Properties prop = new Properties(); static { InputStream in = SystemPropertiesUtil.class.getResourceAsStream("/system.properties"); try { prop.load(in); } catch (IOException e) { e.printStackTrace(); } } public static String getProperty(String key) { String value = prop.getProperty(key).trim(); return value; }} 0 0
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