原文地址：https://blog.csdn.net/chenchunlin526/article/details/70945877
SpringMVC上传图片总结（1）---常规方法进行图片上传，使用了MultipartFile、MultipartHttpServletRequest
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1、web.xml配置，这里主要配置全局的拦截器过滤器等等，常规配置，与其他项目相同，有删减，根据自己的项目情况来定。
<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:web="http://java.sun.com/xml/ns/javaee" xmlns="http://java.sun.com/xml/ns/javaee"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"id="WebApp_ID" version="3.0"><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><filter><filter-name>logFilter</filter-name><filter-class>com.ourchem.web.filter.LogFilter</filter-class></filter><filter-mapping><filter-name>logFilter</filter-name><url-pattern>*.do</url-pattern></filter-mapping><filter-mapping><filter-name>logFilter</filter-name><url-pattern>/j_spring_security_check</url-pattern></filter-mapping><filter-mapping><filter-name>logFilter</filter-name><url-pattern>/j_spring_security_logout</url-pattern></filter-mapping><!-- 配置spring security 权限过滤器 --><filter><filter-name>springSecurityFilterChain</filter-name><filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class></filter><filter-mapping><filter-name>springSecurityFilterChain</filter-name><url-pattern>/*</url-pattern></filter-mapping><!-- SpringMVC的字符编码过滤器 --><filter><filter-name>encodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param><init-param><param-name>forceEncoding</param-name><param-value>false</param-value></init-param></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!-- SpringMVC的前端控制器 --><servlet><servlet-name>spring-mvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc-servlet.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>spring-mvc</servlet-name><!-- 由SpringMVC拦截.do的请求 --><url-pattern>*.do</url-pattern></servlet-mapping><session-config><session-timeout>60</session-timeout></session-config><welcome-file-list><welcome-file>/WEB-INF/jsp/index.jsp</welcome-file><welcome-file>/index.jsp</welcome-file></welcome-file-list><error-page><error-code>404</error-code><location>/WEB-INF/jsp/404.jsp</location></error-page><error-page><error-code>500</error-code><location>/WEB-INF/jsp/500.jsp</location></error-page></web-app>
2、springmvc-servlet.xml配置，这里主要配置springmvc解析器CommonsMultipartResolver等等，这里主要是配置文件上传解析器。
<?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:p="http://www.springframework.org/schema/p"xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.1.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-3.1.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-3.0.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd"><aop:aspectj-autoproxy /><mvc:annotation-driven /><!-- 把标记了@Controller注解的类转换为bean --><context:component-scan base-package="com.ourchem.web.**.controller" use-default-filters="false" ><context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/></context:component-scan><!-- 上传文件的设置 ，maxUploadSize=-1，表示无穷大。uploadTempDir为上传的临时目录 --><bean id="multipartResolver"class="org.springframework.web.multipart.commons.CommonsMultipartResolver"><!-- 设置上传文件的最大尺寸为10MB 10*1024*1024 --><property name="maxUploadSize"><value>10485760</value></property></bean><bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" /><bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" /><!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 --><bean id="viewResolver"class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /><property name="prefix" value="/WEB-INF/jsp/"></property><property name="suffix" value=".jsp"></property></bean></beans>
3、文件上传jsp页面 upload.jsp，上传页面与图片回显页面。
情况一：input标签的name属性全都相同
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><%@ taglib prefix="sec" uri="http://www.springframework.org/security/tags"%><%@ taglib prefix='fmt' uri="http://java.sun.com/jsp/jstl/fmt" %><!DOCTYPE html><html lang="zh-CN"><head><%@ include file="/common/common.jsp"%><title>${projectName }一上传文件</title></head><body><%@ include file="/common/include.jsp" %><div id="top"><div id="layoutHeader"><%@ include file="/common/head.jsp" %></div><div id="layoutMain"><div class="infor-tit">上传文件</div><div class="personal-btn"><a class="fl del-back" href="${basePath }/cms/notices/toUpload.do">返回上传</a></div><div class="infor2-container"><form class="fl-l" id="uploadForm" enctype="multipart/form-data" method="post" action="<c:url value= '/cms/notices/upload.do'/>" ><!-- 上传文件1：<input type="file" name="file"/><br/> --><!-- 上传文件2：<input type="file" name="file"/><br/> -->上传文件3：<input type="file" name="file"/><input type="submit" value="提 交"/></form><h2>上传结果（单个文件）：</h2><img alt="" src="${basePath }${fileUrl }" /><!-- <h2>上传结果（单个文件）：</h2> --><%-- <img alt="" src="${basePath }${fileUrl }" /> --%><!-- 多文件上传则用这个，把上面的input标签注释全部打开，然后把上面的单个文件显示注释掉 --><h2>上传结果（多个文件）：</h2><c:forEach items="${fileUrlList}" var="fileUrl" varStatus="status"><img alt="" src="${basePath }${fileUrl }" /></c:forEach></div></div></div><%@include file="/common/bottom.jsp" %><script type="text/javascript"src="${basePath}/scripts/custom/ie-placeholder.js"></script></body></html>
情况二【多文件上传】：input标签name属性值各不相同，文件上传jsp页面 upload.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><%@ taglib prefix="sec" uri="http://www.springframework.org/security/tags"%><%@ taglib prefix='fmt' uri="http://java.sun.com/jsp/jstl/fmt" %><!DOCTYPE html><html lang="zh-CN"><head><%@ include file="/common/common.jsp"%><title>${projectName }一上传文件</title></head><body><%@ include file="/common/include.jsp" %><div id="top"><div id="layoutHeader"><%@ include file="/common/head.jsp" %></div><div id="layoutMain"><div class="infor-tit">上传文件</div><div class="personal-btn"><a class="fl del-back" href="${basePath }/cms/notices/toUpload.do">返回上传</a></div><div class="infor2-container"><form class="fl-l" id="uploadForm" enctype="multipart/form-data" method="post" action="<c:url value= '/cms/notices/upload.do'/>" >上传文件1：<input type="file" name="file1"/><br/><br/><br/>上传文件2：<input type="file" name="file2"/><br/><br/><br/>上传文件3：<input type="file" name="file3"/><input type="submit" value="提 交"/></form><h2>上传结果（多个文件）：</h2><c:forEach items="${fileUrlList}" var="fileUrl" varStatus="status"><img alt="" src="${basePath }${fileUrl }" /></c:forEach></div></div></div><%@include file="/common/bottom.jsp" %><script type="text/javascript"src="${basePath}/scripts/custom/ie-placeholder.js"></script></body></html>
4、文件上传controller控制器
/*** 单个文件上传，方式一，使用MultipartFile作为方法参数接收传入的文件* 用 transferTo方法来保存图片，保存到本地磁盘。** @RequestParam("file")中的file对应input标签中的name属性值* @author chunlynn*/@RequestMapping("upload")public String upload(@RequestParam("file") MultipartFile file, HttpServletRequest request, ModelMap model) {// 先判断文件是否为空if (!file.isEmpty()) {// 获得原始文件名String fileName = file.getOriginalFilename();// 重命名文件String newfileName = new Date().getTime() + String.valueOf(fileName);//获得物理路径webapp所在路径/*** request.getSession().getServletContext().getRealPath("/")表示当前项目的根路径，如* D:Workspaceseclipse_luna.metadata.pluginsorg.eclipse.wst.server.core mp3wtpwebappssky*/String pathRoot = request.getSession().getServletContext().getRealPath("");// 项目下相对路径String path = FILE_PATH + newfileName;// 创建文件实例File tempFile = new File(pathRoot + path);// 判断父级目录是否存在，不存在则创建if (!tempFile.getParentFile().exists()) {tempFile.getParentFile().mkdir();}// 判断文件是否存在，否则创建文件（夹）if (!tempFile.exists()) {tempFile.mkdir();}try {// 将接收的文件保存到指定文件中file.transferTo(tempFile);} catch (IllegalStateException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}// 方法一：model属性也行model.addAttribute("fileUrl", path); //保存路径，用于jsp页面回显// 方法二：Request域属性也行，两个二选一即可。// request.setAttribute("fileUrl", path);}// getWiewPath方法里就处理了一些路径，相当于转发forward，返回 return "cms/notices/upload";return getViewPath("upload"); // 转发到upload.jsp页面}@RequestMapping("/toUpload")public String toUpload() {// 相当于转发forward，转发到cms/notices/upload.jsp页面,框架会找到该逻辑视图名对应的 View并渲染return getViewPath("upload");}/**单文件上传，方式二，利用MultipartHttpServletRequest来解析request中的文件
* 用 transferTo方法来保存图片，保存到本地磁盘。* 普通request是无法解析请求中的文件的。MultipartHttpServletRequest是springmvc框架中的一个接口，默认实现类是DefaultMultipartHttpServletRequest@author chunlynn/@RequestMapping("upload2")
public String upload2(HttpServletRequest request, HttpServletResponse response, ModelMap model) {
// 先实例化一个文件解析器CommonsMultipartResolver coMultipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
// 判断request请求中是否有文件上传if (coMultipartResolver.isMultipart(request)) {// 转换requestMultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;// 获得文件MultipartFile file = multiRequest.getFile("file");if (!file.isEmpty()) {
// 获得原始文件名String fileName = file.getOriginalFilename();String newfileName = new Date().getTime() + String.valueOf(fileName);//获得物理路径webapp所在路径String pathRoot = request.getSession().getServletContext().getRealPath("");// 项目下相对路径String path = FILE_PATH + newfileName;// 创建文件实例File tempFile = new File(pathRoot + path); //文件保存路径为pathRoot + pathif (!tempFile.getParentFile().exists()) {tempFile.getParentFile().mkdir();}if (!tempFile.exists()) {tempFile.mkdir();}try {// Transfer the received file to the given destination file.file.transferTo(tempFile);} catch (IllegalStateException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}
// 方法一：model属性也行model.addAttribute("fileUrl", path); //保存路径，用于jsp页面回显// 方法二：Request域属性也行，两个二选一即可。// request.setAttribute("fileUrl", path); //保存路径，用于jsp页面回显}}
return getViewPath("upload");}
/**多文件上传，方式一：利用MultipartFile[]作为方法的参数接收传入的文件用 transferTo方法来保存图片，保存到本地磁盘。@author chunlynn/@RequestMapping("upload3")public String upload3(@RequestParam("file") MultipartFile[] files, HttpServletRequest request,HttpServletResponse response, ModelMap model) {
List<String> fileUrlList = new ArrayList<String>(); //用来保存文件路径，用于jsp页面回显用String path = "";
// 先判断文件files不为空if (files != null && files.length > 0) {for (MultipartFile file : files) { //循环遍历，取出单个文件，下面的操作和单个文件就一样了if (!file.isEmpty()) {//这个判断必须加上
// 获得原始文件名String fileName = file.getOriginalFilename();String newfileName = new Date().getTime() + String.valueOf(fileName);//获得物理路径webapp所在路径String pathRoot = request.getSession().getServletContext().getRealPath("");// 项目下相对路径path = FILE_PATH + newfileName;// 创建文件实例File tempFile = new File(pathRoot + path); //文件保存路径为pathRoot + pathif (!tempFile.getParentFile().exists()) { /这个判断必须加上tempFile.getParentFile().mkdir();}if (!tempFile.exists()) {tempFile.mkdir();}try {// Transfer the received file to the given destination file.file.transferTo(tempFile);} catch (IllegalStateException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}
fileUrlList.add(path);}}
// 方法一：model属性保存图片路径也行model.addAttribute("fileUrlList", fileUrlList); //保存路径，用于jsp页面回显// 方法二：request域属性保存图片路径也行，两个二选一即可。// request.setAttribute("fileUrlList", fileUrlList); //保存路径，用于jsp页面回显
}
return getViewPath("upload");}/**多文件上传，方式二：利用MultipartHttpServletRequest来解析Request中的文件用 transferTo方法来保存图片，保存到本地磁盘。@author chunlynn*/@RequestMapping("upload4")public String upload4(HttpServletRequest request, HttpServletResponse response, ModelMap model) {
// 先实例化一个文件解析器CommonsMultipartResolver coMultiResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
// 判断request请求中是否有文件上传if (coMultiResolver.isMultipart(request)) {
List<String> fileUrlList = new ArrayList<String>(); //用来保存文件路径，用来jsp页面遍历回显// 转换RequestMultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;// 获得文件，方式一List<MultipartFile> files = multiRequest.getFiles("file");for (MultipartFile file : files) { //循环遍历，取出单个文件，下面的操作和单个文件就一样了if (!file.isEmpty()) { //这个判断必须要加
// 获得原始文件名String fileName = file.getOriginalFilename();String newfileName = new Date().getTime() + String.valueOf(fileName);//获得物理路径webapp所在路径String pathRoot = request.getSession().getServletContext().getRealPath("");// 项目下相对路径String path = FILE_PATH + newfileName;// 创建文件实例File tempFile = new File(pathRoot + path); //文件保存路径为pathRoot + pathif (!tempFile.getParentFile().exists()) {tempFile.getParentFile().mkdir();}
if (!tempFile.exists()) {tempFile.mkdir();}
try {file.transferTo(tempFile);} catch (IllegalStateException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}
fileUrlList.add(path);}}
// 方法一：model属性保存图片路径也行model.addAttribute("fileUrlList", fileUrlList); //保存路径，用于jsp页面回显// 方法二：request域属性保存图片路径也行，两个二选一即可。// request.setAttribute("fileUrlList", fileUrlList); //保存路径，用于jsp页面回显
}
return getViewPath("upload");}/**多文件上传，方式三：利用MultipartHttpServletRequest来解析Request中的文件，用流的方式将文件存到磁盘使用流来存图片，保存到本地磁盘。@author chunlynn/@RequestMapping("upload5")public String upload5(HttpServletRequest request, HttpServletResponse response, ModelMap model) {
// 先实例化一个文件解析器CommonsMultipartResolver coMultiResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
// 判断request请求中是否有文件上传if (coMultiResolver.isMultipart(request)) {
List<String> fileUrlList = new ArrayList<String>(); //用来保存文件路径// 转换RequestMultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;// 获得文件，方式一，input标签name属性值相同都为"file"List<MultipartFile> files = multiRequest.getFiles("file");for (MultipartFile file : files) { //循环遍历，取出单个文件，下面的操作和单个文件就一样了if (!file.isEmpty()) { //这个判断必须要加
// 获得原始文件名String fileName = file.getOriginalFilename();String newfileName = new Date().getTime() + String.valueOf(fileName);//获得物理路径webapp所在路径String pathRoot = request.getSession().getServletContext().getRealPath("");// 项目下相对路径String path = FILE_PATH + newfileName;
try {//创建输出流，用流将文件保存到指定目录FileOutputStream fos = new FileOutputStream(pathRoot + path);// 获得输入流InputStream in = file.getInputStream();int len = 0;byte[] buffer = new byte[1024]; //创建缓冲区 1kB，byte表示一个字节B，1KB=1024B// Reads some number of bytes from the inputstream and stores them into the buffer array b.while ((len = in.read(buffer)) != -1) { // 如果不用缓存，会一个字节一个字节的写，这样影响效率，效率低下fos.write(buffer, 0, len); //每次1KB的方式写入}fos.flush();fos.close();in.close();} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}
fileUrlList.add(path);}}
// 方法一：model属性保存图片路径也行model.addAttribute("fileUrlList", fileUrlList); //保存路径，用于jsp页面回显// 方法二：request域属性保存图片路径也行，两个二选一即可。// request.setAttribute("fileUrlList", fileUrlList); //保存路径，用于jsp页面回显
}
return getViewPath("upload");}/**多文件上传，方式三：利用MultipartHttpServletRequest来解析Request中的文件，用流的方式将文件存到磁盘使用流来存图片，保存到本地磁盘。jsp页面的input标签可以有不同的name属性值@author chunlynn*/@RequestMapping("upload6")public String upload6(HttpServletRequest request, HttpServletResponse response, ModelMap model) {
// 先实例化一个文件解析器CommonsMultipartResolver coMultiResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
// 判断request请求中是否有文件上传if (coMultiResolver.isMultipart(request)) {
List<String> fileUrlList = new ArrayList<String>(); //用来保存文件路径// 转换RequestMultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
// 获得文件，方式二// Return an java.util.Iterator of String objects containing the parameter names of the multipart files contained in this request.// jsp页面的input标签可以有不同的name属性值Iterator<String> fileNames = multiRequest.getFileNames();
while (fileNames.hasNext()) { //循环遍历MultipartFile file = multiRequest.getFile(fileNames.next()); //取出单个文件if (!file.isEmpty()) { //这个判断必须要加，下面的操作和单个文件就一样了// 获得原始文件名String fileName = file.getOriginalFilename();String newfileName = new Date().getTime() + String.valueOf(fileName);//获得物理路径webapp所在路径String pathRoot = request.getSession().getServletContext().getRealPath("");// 项目下相对路径String path = FILE_PATH + newfileName;
try {//创建输出流，用流将文件保存到指定目录FileOutputStream fos = new FileOutputStream(pathRoot + path);// 获得输入流InputStream in = file.getInputStream();int len = 0;byte[] buffer = new byte[1024]; //创建缓冲区 1kB，byte表示一个字节B，1KB=1024B// Reads some number of bytes from the inputstream and stores them into the buffer array b.while ((len = in.read(buffer)) != -1) { // 如果不用缓存，会一个字节一个字节的写，这样影响效率，效率低下fos.write(buffer, 0, len); //每次1KB的方式写入}fos.flush();fos.close();in.close();
} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}
fileUrlList.add(path);}}
// 方法一：model属性保存图片路径也行model.addAttribute("fileUrlList", fileUrlList); //保存路径，用于jsp页面回显// 方法二：request域属性保存图片路径也行，两个二选一即可。// request.setAttribute("fileUrlList", fileUrlList); //保存路径，用于jsp页面回显
}
return getViewPath("upload");}
public static final String FILE_PATH = "/upload/chunlynn/"; //相对路径/**单文件上传，利用MultipartHttpServletRequest来解析Request中的文件，用流的方式将文件存到数据库。使用流来存图片，保存进数据库。保存进数据库的多半是用户头像之类的小图片，占用空间比较小的。一次一张。jsp页面的其他参数，可以通过request.getParameter()获取@author chunlynn*/@RequestMapping("upload7")public String upload7(HttpServletRequest request, HttpServletResponse response, ModelMap model) {
// 先实例化一个文件解析器CommonsMultipartResolver coMultiResolver = new CommonsMultipartResolver(request.getSession().getServletContext());// 判断request请求中是否有文件上传if (coMultiResolver.isMultipart(request)) {// 转换RequestMultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;// 获得文件MultipartFile file = multiRequest.getFile("file");
if (!file.isEmpty()) { //这个判断必须要加
try {// 举例，Notices就是一个普通的model类
Notices notices = new Notices();notices.setCreateDate(new Date());notices.setPicPath("/upload/aaa.jpg");// jsp页面中的其他非文件类参数，直接request就可以获取到
notices.setTitle(request.getParameter("title"));if (StringUtil.isNotEmpty(request.getParameter("isShowPic"))) {notices.setIsShowPic(1);} else {notices.setIsShowPic(0);}notices.setIsShowTitle(1);notices.setContent("这是内容content");
// 获得输入流InputStream in = file.getInputStream();byte[] data = new byte[] {};data = inputStreamToByte(in);// 将文件保存到字节数组中notices.setLogo(data); // 将字节数组保存到对象中
noticesService.save(notices); // 保存进数据库in.close();} catch (FileNotFoundException e) {e.printStackTrace();} catch (Exception e) {e.printStackTrace();}}}
return getViewPath("upload");}/**将文件保存到字节数组中This class implements an output stream in which the data is written into a byte array.* @author chunlynn*/public byte[] inputStreamToByte(InputStream in) throws Exception {// This class implements an output stream in which the data is written into a byte array.ByteArrayOutputStream bos = new ByteArrayOutputStream(); // 输出流对象，用来接收文件流，然后写入一个字节数组中int len;byte[] buffer = new byte[1024]; //缓存1KBwhile ((len = in.read(buffer)) != -1) {bos.write(buffer, 0, len);}byte[] data = bos.toByteArray(); // 字节数组，输出流中的文件保存到字节数组bos.close();return data;}/**该方法放在父类controller中* @author chunlynn*/
protected String viewPath = "cms/notices"; //在本controller进行初始化
protected String getViewPath(String viewName) {if (viewPath == null)return viewName;if (viewPath.endsWith(File.separator))return viewPath + viewName;return viewPath + File.separator + viewName;}
1）、数对应数据库字段设计
2）、对应的bean：
private byte[] logo; //头像
public byte[] getLogo() {
return logo;
}
public void setLogo(byte[] logo) {
this.logo = logo;
}
3）、保存进数据库成功截图
4）、保存进数据库的图片，如何在页面上显示？
/*** 以字节数组保存在数据库里的图片，如要在jsp页面显示，则调用controller方法，该用户有头像则会显示，然后img标签的src中获得* 的是写在Reponse中的流*/<div id="userLogoContainer" class="head-pic portrait"><c:if test="${! empty domain.LOGO}" var="rs"><img src="<c:url value='/cms/notices/getUserLogo.do'/>" width="100px" height="100px"/></c:if></div>
/**获取用户logo@author chunlynn*/
@RequestMapping(value = "/getUserLogo")public void getUserLogo(HttpServletRequest request, HttpServletResponse response) throws Exception {Loginer loginer = (Loginer) request.getSession().getAttribute(Loginer.SESSION_KEY);User user = userInfoService.getUserById(loginer.getId()); //获取当前用户对象if (user != null) {if (user.getLogo() != null) {byte[] data = new byte[] {};data = (byte[]) user.getLogo(); //获取当前用户对象中的logo数据，转为字节数组response.setContentType("");OutputStream outputStream = response.getOutputStream(); //response的输出流for (int i = 0; i < data.length; i++) {outputStream.write(data[i]); //resp出字节流}outputStream.close(); //关闭输出流}}}
5、利用百度上传组件WebUploader进行上传，springmvc进行接收处理
百度上传组件初始化时，
组件默认会生成一个隐藏的input标签，name属性值为“file”，且encType="multipart/form-data"。后台controller按上面springmvc处理方法接收文件即可。
/****/<!-- webuploader.js --><script type="text/javascript" src="${basePath }/scripts/webuploader/webuploader.js"> </script><!-- webuploader.css --><link rel="stylesheet" type="text/css" href="${basePath }/scripts/webuploader/webuploader.css"><script type="text/javascript" src="${basePath }/scripts/cms/mywebuploader.js"></script><!--dom结构部分--><div id="uploader-demo" ><!--用来存放item，图片列表fileList--><div id="fileList" class="uploader-list"></div><div id="filePicker" >选择图片</div></div><!-- <input type="button" id="btn" value="开始上传"> -->
=js文件=
$(function() {
var $ = jQuery,// 展示图片列表的容器
$list = $('#fileList'),// 优化retina, 在retina下这个值是2ratio = window.devicePixelRatio || 1,
// 缩略图大小，像素像素thumbnailWidth = 100 ratio,thumbnailHeight = 100 ratio,
// Web Uploader实例uploader;
// 初始化Web Uploadervar uploader = WebUploader.create({
// 选完文件后，是否自动上传。auto: true,
// swf文件路径swf: basePath + '/scripts/webuploader/Uploader.swf',
// 文件接收服务端。server: basePath + '/cms/notices/upload8.do',
//fileVal : "file", // 指定input标签name的属性值
threads:'5', //同时运行5个线程传输fileNumLimit:'10', //文件总数量只能选择10个
// 选择文件的按钮。可选。// 内部根据当前运行是创建，可能是input元素，也可能是flash.// pick: '#filePicker',pick: { id:'#filePicker', //选择文件的按钮multiple:true },
// 只允许选择图片文件。accept: {title: 'Images',extensions: 'gif,jpg,jpeg,bmp,png',mimeTypes: 'image/'}});
// 当有文件添加进来的时候，//监听fileQueued事件，通过uploader.makeThumb来创建图片预览图。//PS: 这里得到的是Data URL数据，IE6、IE7不支持直接预览。可以借助FLASH或者服务端来完成预览。uploader.on( 'fileQueued', function( file ) {var $li = $('<div id="' + file.id + '" class="file-item thumbnail">' +'<img>' +'<div class="info">' + file.name + '</div>' +'</div>'),$img = $li.find('img');// $list为容器jQuery实例
$list.append( $li );
// 创建缩略图, thumbnailWidth x thumbnailHeight 为 100 x 100uploader.makeThumb( file, function( error, src ) { //webuploader方法if ( error ) {$img.replaceWith('<span>不能预览</span>');return;}$img.attr( 'src', src );}, thumbnailWidth, thumbnailHeight );
});
// 然后剩下的就是上传状态提示了，当文件 上传过程中, 上传成功，上传失败，上传完成// 都分别对应uploadProgress, uploadSuccess, uploadError, uploadComplete事件。
// 文件上传过程中创建进度条实时显示。uploader.on( 'uploadProgress', function( file, percentage ) {var $li = $( '#'+file.id ),$percent = $li.find('.progress span');
// 避免重复创建if ( !$percent.length ) {$percent = $('<p class="progress"><span></span></p>').appendTo( $li ).find('span');}
$percent.css( 'width', percentage * 100 + '%' );});
// 文件上传成功，给item添加成功class, 用样式标记上传成功。uploader.on( 'uploadSuccess', function( file,response) {$( '#'+file.id ).addClass('upload-state-done');});
// 文件上传失败，现实上传出错。uploader.on( 'uploadError', function( file ) {var $li = $( '#'+file.id ),$error = $li.find('div.error');
// 避免重复创建if ( !$error.length ) {$error = $('<div class="error"></div>').appendTo( $li );}$error.text('上传失败');
});
// 完成上传完了，成功或者失败，先删除进度条。uploader.on( 'uploadComplete', function( file ) {$( '#'+file.id ).find('.progress').remove();});
//绑定提交事件$("#btn").click(function() {console.log("上传...");uploader.upload(); //执行手动提交console.log("上传成功");});});
全文完。
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版权声明：本文为博主（chunlynn）原创文章，转载请注明出处 ：http://blog.csdn.net/chenchunlin526/article/details/70945877
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