Spring MVC 文件上傳下載

(1) 導入jar包：ant.jar、commons-fileupload.jar、connom-io.jar。

(2) 在src/context/dispatcher.xml中添加

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

1. /**
2. *
3. * @author geloin
4. * @date 2012-5-5 下午12:05:57
5. */
6. package com.geloin.spring.util;
8. import java.io.BufferedInputStream;
9. import java.io.BufferedOutputStream;
10. import java.io.File;
11. import java.io.FileInputStream;
12. import java.io.FileOutputStream;
13. import java.text.SimpleDateFormat;
14. import java.util.ArrayList;
15. import java.util.Date;
16. import java.util.HashMap;
17. import java.util.Iterator;
18. import java.util.List;
19. import java.util.Map;
21. import javax.servlet.http.HttpServletRequest;
22. import javax.servlet.http.HttpServletResponse;
24. import org.apache.tools.zip.ZipEntry;
25. import org.apache.tools.zip.ZipOutputStream;
26. import org.springframework.util.FileCopyUtils;
27. import org.springframework.web.multipart.MultipartFile;
28. import org.springframework.web.multipart.MultipartHttpServletRequest;
30. /**
31. *
32. * @author geloin
33. * @date 2012-5-5 下午12:05:57
34. */
35. public class FileOperateUtil {
36. private static final String REALNAME = "realName";
37. private static final String STORENAME = "storeName";
38. private static final String SIZE = "size";
39. private static final String SUFFIX = "suffix";
40. private static final String CONTENTTYPE = "contentType";
41. private static final String CREATETIME = "createTime";
42. private static final String UPLOADDIR = "uploadDir/";
44. /**
45. * 將上傳的文件進行重命名
46. *
47. * @author geloin
48. * @date 2012-3-29 下午3:39:53
49. * @param name
50. * @return
51. */
52. private static String rename(String name) {
54. Long now = Long.parseLong(new SimpleDateFormat("yyyyMMddHHmmss")
55. .format(new Date()));
56. Long random = (long) (Math.random() * now);
57. String fileName = now + "" + random;
59. if (name.indexOf(".") != -1) {
60. fileName += name.substring(name.lastIndexOf("."));
61. }
63. return fileName;
64. }
66. /**
67. * 壓縮後的文件名
68. *
69. * @author geloin
70. * @date 2012-3-29 下午6:21:32
71. * @param name
72. * @return
73. */
74. private static String zipName(String name) {
75. String prefix = "";
76. if (name.indexOf(".") != -1) {
77. prefix = name.substring(0, name.lastIndexOf("."));
78. } else {
79. prefix = name;
80. }
81. return prefix + ".zip";
82. }
84. /**
85. * 上傳文件
86. *
87. * @author geloin
88. * @date 2012-5-5 下午12:25:47
89. * @param request
90. * @param params
91. * @param values
92. * @return
93. * @throws Exception
94. */
95. public static List<Map<String, Object>> upload(HttpServletRequest request,
96. String[] params, Map<String, Object[]> values) throws Exception {
98. List<Map<String, Object>> result = new ArrayList<Map<String, Object>>();
100. MultipartHttpServletRequest mRequest = (MultipartHttpServletRequest) request;
101. Map<String, MultipartFile> fileMap = mRequest.getFileMap();
103. String uploadDir = request.getSession().getServletContext()
104. .getRealPath("/")
105. + FileOperateUtil.UPLOADDIR;
106. File file = new File(uploadDir);
108. if (!file.exists()) {
109. file.mkdir();
110. }
112. String fileName = null;
113. int i = 0;
114. for (Iterator<Map.Entry<String, MultipartFile>> it = fileMap.entrySet()
115. .iterator(); it.hasNext(); i++) {
117. Map.Entry<String, MultipartFile> entry = it.next();
118. MultipartFile mFile = entry.getValue();
120. fileName = mFile.getOriginalFilename();
122. String storeName = rename(fileName);
124. String noZipName = uploadDir + storeName;
125. String zipName = zipName(noZipName);
127. // 上傳成為壓縮文件
128. ZipOutputStream outputStream = new ZipOutputStream(
129. new BufferedOutputStream(new FileOutputStream(zipName)));
130. outputStream.putNextEntry(new ZipEntry(fileName));
131. outputStream.setEncoding("GBK");
133. FileCopyUtils.copy(mFile.getInputStream(), outputStream);
135. Map<String, Object> map = new HashMap<String, Object>();
136. // 固定參數值對
137. map.put(FileOperateUtil.REALNAME, zipName(fileName));
138. map.put(FileOperateUtil.STORENAME, zipName(storeName));
139. map.put(FileOperateUtil.SIZE, new File(zipName).length());
140. map.put(FileOperateUtil.SUFFIX, "zip");
141. map.put(FileOperateUtil.CONTENTTYPE, "application/octet-stream");
142. map.put(FileOperateUtil.CREATETIME, new Date());
144. // 自定義參數值對
145. for (String param : params) {
146. map.put(param, values.get(param)[i]);
147. }
149. result.add(map);
150. }
151. return result;
152. }
154. /**
155. * 下載
156. *
157. * @author geloin
158. * @date 2012-5-5 下午12:25:39
159. * @param request
160. * @param response
161. * @param storeName
162. * @param contentType
163. * @param realName
164. * @throws Exception
165. */
166. public static void download(HttpServletRequest request,
167. HttpServletResponse response, String storeName, String contentType,
168. String realName) throws Exception {
169. response.setContentType("text/html;charset=UTF-8");
170. request.setCharacterEncoding("UTF-8");
171. BufferedInputStream bis = null;
172. BufferedOutputStream bos = null;
174. String ctxPath = request.getSession().getServletContext()
175. .getRealPath("/")
176. + FileOperateUtil.UPLOADDIR;
177. String downLoadPath = ctxPath + storeName;
179. long fileLength = new File(downLoadPath).length();
181. response.setContentType(contentType);
182. response.setHeader("Content-disposition", "attachment; filename="
183. + new String(realName.getBytes("utf-8"), "ISO8859-1"));
184. response.setHeader("Content-Length", String.valueOf(fileLength));
186. bis = new BufferedInputStream(new FileInputStream(downLoadPath));
187. bos = new BufferedOutputStream(response.getOutputStream());
188. byte[] buff = new byte[2048];
189. int bytesRead;
190. while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
191. bos.write(buff, 0, bytesRead);
192. }
193. bis.close();
194. bos.close();
195. }
196. }