spring - mvc 上传与下载

参照了网上相关代码 注意事项: 1 springmvc.xml必须配置:

Java代码  

  1. <bean id="multipartResolver"
  2. class="org.springframework.web.multipart.commons.CommonsMultipartResolver" p:defaultEncoding="utf-8"/>
<bean id="multipartResolver"
		class="org.springframework.web.multipart.commons.CommonsMultipartResolver" p:defaultEncoding="utf-8"/>

2 WEB-INF/lib下必加入:commons-fileupload.jar与commons-io-1.4.jar二个文件

3 表单属性为: enctype="multipart/form-data" 工程项目图片如下:

具体代码如下: FileUploadBean.java

Java代码  

  1. public class FileUploadBean {
  2. private byte[] file;
  3. public void setFile(byte[] file) {
  4. this.file = file;
  5. }
  6. public byte[] getFile() {
  7. return file;
  8. }
  9. }
public class FileUploadBean {
	private byte[] file;

	public void setFile(byte[] file) {
		this.file = file;
	}

	public byte[] getFile() {
		return file;
	}
}

Java代码  

  1. package net.liuzd.web;
  2. import java.io.BufferedInputStream;
  3. import java.io.BufferedOutputStream;
  4. import java.io.File;
  5. import java.io.FileInputStream;
  6. import java.io.IOException;
  7. import java.net.BindException;
  8. import java.util.ArrayList;
  9. import java.util.List;
  10. import java.util.Map;
  11. import javax.servlet.http.HttpServletRequest;
  12. import javax.servlet.http.HttpServletResponse;
  13. import org.springframework.stereotype.Controller;
  14. import org.springframework.util.FileCopyUtils;
  15. import org.springframework.web.bind.annotation.PathVariable;
  16. import org.springframework.web.bind.annotation.RequestMapping;
  17. import org.springframework.web.bind.annotation.RequestMethod;
  18. import org.springframework.web.bind.annotation.RequestParam;
  19. import org.springframework.web.multipart.MultipartFile;
  20. import org.springframework.web.multipart.MultipartHttpServletRequest;
  21. import org.springframework.web.multipart.commons.CommonsMultipartFile;
  22. import org.springframework.web.servlet.ModelAndView;
  23. /**
  24. * Title: Description: Copyright: Copyright (c) 2011
  25. * Company:http://liuzidong.iteye.com/ Makedate:2011-5-27 下午01:52:17
  26. *
  27. * @author liuzidong
  28. * @version 1.0
  29. * @since 1.0
  30. *
  31. */
  32. @Controller
  33. public class FileUploadController {
  34. @RequestMapping(value = "/upload", method = RequestMethod.POST)
  35. public ModelAndView onSubmit(HttpServletRequest request,
  36. HttpServletResponse response, BindException errors)
  37. throws Exception {
  38. MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
  39. CommonsMultipartFile file = (CommonsMultipartFile) multipartRequest
  40. .getFile("file");
  41. String name = multipartRequest.getParameter("name");
  42. System.out.println("name: " + name);
  43. // 获得文件名：
  44. String realFileName = file.getOriginalFilename();
  45. System.out.println("获得文件名：" + realFileName);
  46. // 获取路径
  47. String ctxPath = request.getSession().getServletContext().getRealPath(
  48. "/")
  49. + "images/";
  50. // 创建文件
  51. File dirPath = new File(ctxPath);
  52. if (!dirPath.exists()) {
  53. dirPath.mkdir();
  54. }
  55. File uploadFile = new File(ctxPath + realFileName);
  56. FileCopyUtils.copy(file.getBytes(), uploadFile);
  57. request.setAttribute("files", loadFiles(request));
  58. return new ModelAndView("success");
  59. }
  60. @RequestMapping(value = "/upload2", method = RequestMethod.POST)
  61. public ModelAndView onSubmit2(HttpServletRequest request,
  62. HttpServletResponse response, BindException errors)
  63. throws Exception {
  64. // 转型为MultipartHttpRequest
  65. MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
  66. // 根据前台的name名称得到上传的文件
  67. MultipartFile file = multipartRequest.getFile("file");
  68. // 获得文件名：
  69. String realFileName = file.getOriginalFilename();
  70. // 获取路径
  71. String ctxPath = request.getSession().getServletContext().getRealPath(
  72. "/")
  73. + "\\" + "images\\";
  74. // 创建文件
  75. File dirPath = new File(ctxPath);
  76. if (!dirPath.exists()) {
  77. dirPath.mkdir();
  78. }
  79. File uploadFile = new File(ctxPath + realFileName);
  80. FileCopyUtils.copy(file.getBytes(), uploadFile);
  81. request.setAttribute("files", loadFiles(request));
  82. return new ModelAndView("success");
  83. }
  84. @RequestMapping(value = "/upload3", method = RequestMethod.POST)
  85. public String upload(@RequestParam("file")
  86. MultipartFile image, HttpServletRequest request) throws IOException {
  87. String ctxPath = request.getSession().getServletContext().getRealPath(
  88. "/")
  89. + "\\" + "images\\";
  90. System.out.println("路径：" + ctxPath);
  91. File file = new File(ctxPath + "/" + image.getOriginalFilename());
  92. // FileCopyUtils.copy(image.getBytes(),new
  93. // File(ctxPath+"/"+image.getOriginalFilename()));
  94. try {
  95. image.transferTo(file); // 保存上传的文件
  96. } catch (IllegalStateException e) {
  97. e.printStackTrace();
  98. } catch (IOException e) {
  99. e.printStackTrace();
  100. }
  101. request.setAttribute("files", loadFiles(request));
  102. return "success";
  103. }
  104. // 多文件上传
  105. @RequestMapping(value = "/upload4", method = RequestMethod.POST)
  106. public ModelAndView fileUpload(HttpServletRequest request,
  107. HttpServletResponse response, BindException errors)
  108. throws Exception {
  109. MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
  110. Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();
  111. String ctxPath = request.getSession().getServletContext().getRealPath(
  112. "/")
  113. + "\\" + "images\\";
  114. File file = new File(ctxPath);
  115. if (!file.exists()) {
  116. file.mkdir();
  117. }
  118. String fileName = null;
  119. for (Map.Entry<String, MultipartFile> entity : fileMap.entrySet()) {
  120. // 上传文件名
  121. // System.out.println("key: " + entity.getKey());
  122. MultipartFile mf = entity.getValue();
  123. fileName = mf.getOriginalFilename();
  124. File uploadFile = new File(ctxPath + fileName);
  125. FileCopyUtils.copy(mf.getBytes(), uploadFile);
  126. }
  127. request.setAttribute("files", loadFiles(request));
  128. return new ModelAndView("success");
  129. }
  130. // @ModelAttribute("files")//此属性用于初始类时调用,但上传文件后不能时时反应上传文件个数,不适合动态数据
  131. public List<String> loadFiles(HttpServletRequest request) {
  132. List<String> files = new ArrayList<String>();
  133. String ctxPath = request.getSession().getServletContext().getRealPath(
  134. "/")
  135. + "\\" + "images\\";
  136. File file = new File(ctxPath);
  137. if (file.exists()) {
  138. File[] fs = file.listFiles();
  139. String fname = null;
  140. for (File f : fs) {
  141. fname = f.getName();
  142. if (f.isFile()) {
  143. files.add(fname);
  144. }
  145. }
  146. }
  147. return files;
  148. }
  149. @RequestMapping("/download/{fileName}")
  150. public ModelAndView download(@PathVariable("fileName")
  151. String fileName, HttpServletRequest request, HttpServletResponse response)
  152. throws Exception {
  153. response.setContentType("text/html;charset=utf-8");
  154. request.setCharacterEncoding("UTF-8");
  155. java.io.BufferedInputStream bis = null;
  156. java.io.BufferedOutputStream bos = null;
  157. String ctxPath = request.getSession().getServletContext().getRealPath(
  158. "/")
  159. + "\\" + "images\\";
  160. String downLoadPath = ctxPath + fileName;
  161. System.out.println(downLoadPath);
  162. try {
  163. long fileLength = new File(downLoadPath).length();
  164. response.setContentType("application/x-msdownload;");
  165. response.setHeader("Content-disposition", "attachment; filename="
  166. + new String(fileName.getBytes("utf-8"), "ISO8859-1"));
  167. response.setHeader("Content-Length", String.valueOf(fileLength));
  168. bis = new BufferedInputStream(new FileInputStream(downLoadPath));
  169. bos = new BufferedOutputStream(response.getOutputStream());
  170. byte[] buff = new byte[2048];
  171. int bytesRead;
  172. while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
  173. bos.write(buff, 0, bytesRead);
  174. }
  175. } catch (Exception e) {
  176. e.printStackTrace();
  177. } finally {
  178. if (bis != null)
  179. bis.close();
  180. if (bos != null)
  181. bos.close();
  182. }
  183. return null;
  184. }
  185. }
package net.liuzd.web;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.BindException;
import java.util.ArrayList;

import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.bind.annotation.PathVariable;
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.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
import org.springframework.web.servlet.ModelAndView;

/**
 * Title: Description: Copyright: Copyright (c) 2011
 * Company:http://liuzidong.iteye.com/ Makedate:2011-5-27 下午01:52:17
 *
 * @author liuzidong
 * @version 1.0
 * @since 1.0
 *
 */
@Controller
public class FileUploadController {

	@RequestMapping(value = "/upload", method = RequestMethod.POST)
	public ModelAndView onSubmit(HttpServletRequest request,
			HttpServletResponse response, BindException errors)
			throws Exception {

		MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
		CommonsMultipartFile file = (CommonsMultipartFile) multipartRequest
				.getFile("file");

		String name = multipartRequest.getParameter("name");
		System.out.println("name: " + name);
		// 获得文件名：
		String realFileName = file.getOriginalFilename();
		System.out.println("获得文件名：" + realFileName);
		// 获取路径
		String ctxPath = request.getSession().getServletContext().getRealPath(
				"/")
				+ "images/";
		// 创建文件
		File dirPath = new File(ctxPath);
		if (!dirPath.exists()) {
			dirPath.mkdir();
		}
		File uploadFile = new File(ctxPath + realFileName);
		FileCopyUtils.copy(file.getBytes(), uploadFile);
		request.setAttribute("files", loadFiles(request));
		return new ModelAndView("success");
	}

	@RequestMapping(value = "/upload2", method = RequestMethod.POST)
	public ModelAndView onSubmit2(HttpServletRequest request,
			HttpServletResponse response, BindException errors)
			throws Exception {

		// 转型为MultipartHttpRequest
		MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
		// 根据前台的name名称得到上传的文件
		MultipartFile file = multipartRequest.getFile("file");
		// 获得文件名：
		String realFileName = file.getOriginalFilename();
		// 获取路径
		String ctxPath = request.getSession().getServletContext().getRealPath(
				"/")
				+ "\\" + "images\\";
		// 创建文件
		File dirPath = new File(ctxPath);
		if (!dirPath.exists()) {
			dirPath.mkdir();
		}
		File uploadFile = new File(ctxPath + realFileName);
		FileCopyUtils.copy(file.getBytes(), uploadFile);
		request.setAttribute("files", loadFiles(request));
		return new ModelAndView("success");
	}

	@RequestMapping(value = "/upload3", method = RequestMethod.POST)
	public String upload(@RequestParam("file")
	MultipartFile image, HttpServletRequest request) throws IOException {

		String ctxPath = request.getSession().getServletContext().getRealPath(
				"/")
				+ "\\" + "images\\";
		System.out.println("路径：" + ctxPath);
		File file = new File(ctxPath + "/" + image.getOriginalFilename());
		// FileCopyUtils.copy(image.getBytes(),new
		// File(ctxPath+"/"+image.getOriginalFilename()));
		try {
			image.transferTo(file); // 保存上传的文件
		} catch (IllegalStateException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		request.setAttribute("files", loadFiles(request));
		return "success";
	}

	// 多文件上传
	@RequestMapping(value = "/upload4", method = RequestMethod.POST)
	public ModelAndView fileUpload(HttpServletRequest request,
			HttpServletResponse response, BindException errors)
			throws Exception {

		MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
		Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();
		String ctxPath = request.getSession().getServletContext().getRealPath(
				"/")
				+ "\\" + "images\\";

		File file = new File(ctxPath);
		if (!file.exists()) {
			file.mkdir();
		}
		String fileName = null;
		for (Map.Entry<String, MultipartFile> entity : fileMap.entrySet()) {
			// 上传文件名
			// System.out.println("key: " + entity.getKey());
			MultipartFile mf = entity.getValue();
			fileName = mf.getOriginalFilename();
			File uploadFile = new File(ctxPath + fileName);
			FileCopyUtils.copy(mf.getBytes(), uploadFile);
		}
		request.setAttribute("files", loadFiles(request));
		return new ModelAndView("success");
	}

	// @ModelAttribute("files")//此属性用于初始类时调用,但上传文件后不能时时反应上传文件个数,不适合动态数据
	public List<String> loadFiles(HttpServletRequest request) {
		List<String> files = new ArrayList<String>();
		String ctxPath = request.getSession().getServletContext().getRealPath(
				"/")
				+ "\\" + "images\\";
		File file = new File(ctxPath);
		if (file.exists()) {
			File[] fs = file.listFiles();
			String fname = null;
			for (File f : fs) {
				fname = f.getName();
				if (f.isFile()) {
					files.add(fname);
				}
			}
		}
		return files;
	}

	@RequestMapping("/download/{fileName}")
	public ModelAndView download(@PathVariable("fileName")
	String fileName, HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		response.setContentType("text/html;charset=utf-8");
		request.setCharacterEncoding("UTF-8");
		java.io.BufferedInputStream bis = null;
		java.io.BufferedOutputStream bos = null;

		String ctxPath = request.getSession().getServletContext().getRealPath(
				"/")
				+ "\\" + "images\\";
		String downLoadPath = ctxPath + fileName;
		System.out.println(downLoadPath);
		try {
			long fileLength = new File(downLoadPath).length();
			response.setContentType("application/x-msdownload;");
			response.setHeader("Content-disposition", "attachment; filename="
					+ new String(fileName.getBytes("utf-8"), "ISO8859-1"));
			response.setHeader("Content-Length", String.valueOf(fileLength));
			bis = new BufferedInputStream(new FileInputStream(downLoadPath));
			bos = new BufferedOutputStream(response.getOutputStream());
			byte[] buff = new byte[2048];
			int bytesRead;
			while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
				bos.write(buff, 0, bytesRead);
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (bis != null)
				bis.close();
			if (bos != null)
				bos.close();
		}
		return null;
	}
}

spring.xml

Java代码  

  1. <?xml version="1.0" encoding="UTF-8" ?>
  2. <beans xmlns="http://www.springframework.org/schema/beans"
  3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4. xmlns:p="http://www.springframework.org/schema/p"
  5. xmlns:context="http://www.springframework.org/schema/context"
  6. xsi:schemaLocation="
  7. http://www.springframework.org/schema/beans
  8. http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
  9. http://www.springframework.org/schema/context
  10. http://www.springframework.org/schema/context/spring-context-3.0.xsd">
  11. <!--
  12. 自动搜索@Controller标注的类
  13. 用于指明系统从哪个路径下寻找controller，然后提前初始化这些对象。
  14. -->
  15. <context:component-scan base-package="net.liuzd.web" />
  16. <!--  ③：对模型视图名称的解析，即在模型视图名称添加前后缀 -->
  17. <bean
  18. class="org.springframework.web.servlet.view.InternalResourceViewResolver"
  19. p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
  20. <bean id="multipartResolver"
  21. class="org.springframework.web.multipart.commons.CommonsMultipartResolver" p:defaultEncoding="utf-8">
  22. <property name="maxUploadSize">
  23. <value>104857600</value>
  24. </property>
  25. <property name="maxInMemorySize">
  26. <value>4096</value>
  27. </property>
  28. </bean>
  29. </beans>
<?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"
	xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	<!--
		自动搜索@Controller标注的类
		用于指明系统从哪个路径下寻找controller，然后提前初始化这些对象。
	-->
	<context:component-scan base-package="net.liuzd.web" />

	<!--  ③：对模型视图名称的解析，即在模型视图名称添加前后缀 -->
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver"
		p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />

	<bean id="multipartResolver"
		class="org.springframework.web.multipart.commons.CommonsMultipartResolver" p:defaultEncoding="utf-8">
		<property name="maxUploadSize">
			<value>104857600</value>
		</property>
		<property name="maxInMemorySize">
			<value>4096</value>
		</property>
	</bean>
</beans>

success.jsp

Java代码  

　　

<form action="${app}/fileupload/upload" method="post" enctype="multipart/form-data">

<input type="file" name="fileName"/>

<input type="submit" value="上传附件">

</form>

web.xml

Java代码  

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
  3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4. xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
  5. http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  6. <context-param>
  7. <param-name>log4jConfigLocation</param-name>
  8. <param-value>/WEB-INF/classes/log4j.properties</param-value>
  9. </context-param>
  10. <context-param>
  11. <param-name>log4jRefreshInterval</param-name>
  12. <param-value>60000</param-value>
  13. </context-param>
  14. <context-param>
  15. <param-name>log4jExposeWebAppRoot</param-name>
  16. <param-value>false</param-value>
  17. </context-param>
  18. <listener>
  19. <listener-class>
  20. org.springframework.web.util.Log4jConfigListener
  21. </listener-class>
  22. </listener>
  23. <filter>
  24. <filter-name>encodingFilter</filter-name>
  25. <filter-class>
  26. org.springframework.web.filter.CharacterEncodingFilter
  27. </filter-class>
  28. <init-param>
  29. <param-name>encoding</param-name>
  30. <param-value>UTF-8</param-value>
  31. </init-param>
  32. <init-param>
  33. <param-name>forceEncoding</param-name>
  34. <param-value>false</param-value>
  35. </init-param>
  36. </filter>
  37. <filter-mapping>
  38. <filter-name>encodingFilter</filter-name>
  39. <url-pattern>*.do</url-pattern>
  40. </filter-mapping>
  41. <filter-mapping>
  42. <filter-name>encodingFilter</filter-name>
  43. <url-pattern>*.jsp</url-pattern>
  44. </filter-mapping>
  45. <servlet>
  46. <servlet-name>springmvc</servlet-name>
  47. <servlet-class>
  48. org.springframework.web.servlet.DispatcherServlet
  49. </servlet-class>
  50. <init-param>
  51. <param-name>contextConfigLocation</param-name>
  52. <param-value>classpath:springmvc.xml</param-value>
  53. </init-param>
  54. <load-on-startup>1</load-on-startup>
  55. </servlet>
  56. <servlet-mapping>
  57. <servlet-name>springmvc</servlet-name>
  58. <url-pattern>*.do</url-pattern>
  59. </servlet-mapping>
  60. <welcome-file-list>
  61. <welcome-file>index.jsp</welcome-file>
  62. </welcome-file-list>
  63. </web-app>
时间： 2024-03-10 17:07:21

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返得利购物. 淘宝.京东500家商城合作,包括全面的商城返利网.注冊就送5元,购物就有返利.随时提现. 同学们,新一轮的返利大潮正在慢慢靠近,让购物都认为自己在赚钱.购物,机票.游戏.酒店旅游,地方特色,娱乐,尽在www.bbuy8.com让你购物省钱,省心.[群号:335156195] Controller 类 package com.upload.action; import java.io.File; import java.io.FileOutputStream; import java

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