本篇介紹了java實現(xiàn)文件保存到本地的方法，具體代碼如下：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
private void savePic(InputStream inputStream, String fileName) { OutputStream os = null; try { String path = "D:\\testFile\\"; // 2、保存到臨時文件 // 1K的數(shù)據(jù)緩沖 byte[] bs = new byte[1024]; // 讀取到的數(shù)據(jù)長度 int len; // 輸出的文件流保存到本地文件 File tempFile = new File(path); if (!tempFile.exists()) { tempFile.mkdirs(); } os = new FileOutputStream(tempFile.getPath() + File.separator + fileName); // 開始讀取 while ((len = inputStream.read(bs)) != -1) { os.write(bs, 0, len); } } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } finally { // 完畢，關(guān)閉所有鏈接 try { os.close(); inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } |
文件保存方法.
附：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
package com.ebways.web.upload.controller;import java.io.*;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Map;import com.ebways.web.base.BaseController;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;import com.ebways.web.upload.url.UploadURL;import org.springframework.web.multipart.MultipartFile;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;@Controller@RequestMapping(value = UploadURL.MODE_NAME)public class UploadController extends BaseController { @RequestMapping(value = UploadURL.IMAGE_UPLOAD) @ResponseBody public String uploadFile(MultipartFile file, HttpServletRequest request, HttpServletResponse response) throws IllegalArgumentException, Exception { // 參數(shù)列表 Map<String, Object> map = new HashMap<>(); map.put("file", file); savePic(file.getInputStream(), file.getOriginalFilename()); //請求接口 String apiReturnStr = "";//apiHttpRequest(map, API_HOST_URL + "/image/upload"); return apiReturnStr; } private void savePic(InputStream inputStream, String fileName) { OutputStream os = null; try { String path = "D:\\testFile\\"; // 2、保存到臨時文件 // 1K的數(shù)據(jù)緩沖 byte[] bs = new byte[1024]; // 讀取到的數(shù)據(jù)長度 int len; // 輸出的文件流保存到本地文件 File tempFile = new File(path); if (!tempFile.exists()) { tempFile.mkdirs(); } os = new FileOutputStream(tempFile.getPath() + File.separator + fileName); // 開始讀取 while ((len = inputStream.read(bs)) != -1) { os.write(bs, 0, len); } } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } finally { // 完畢，關(guān)閉所有鏈接 try { os.close(); inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } /** * <p class="detail"> * 功能：公共Action * </p> * * @date 2016年9月8日 * @author wangsheng */ private String allowSuffix = "jpg,png,gif,jpeg";//允許文件格式 private long allowSize = 2L;//允許文件大小 private String fileName; private String[] fileNames; public String getAllowSuffix() { return allowSuffix; } public void setAllowSuffix(String allowSuffix) { this.allowSuffix = allowSuffix; } public long getAllowSize() { return allowSize * 1024 * 1024; } public void setAllowSize(long allowSize) { this.allowSize = allowSize; } public String getFileName() { return fileName; } public void setFileName(String fileName) { this.fileName = fileName; } public String[] getFileNames() { return fileNames; } public void setFileNames(String[] fileNames) { this.fileNames = fileNames; } /** * <p class="detail"> * 功能：重新命名文件 * </p> * * @return * @author wangsheng * @date 2016年9月8日 */ private String getFileNameNew() { SimpleDateFormat fmt = new SimpleDateFormat("yyyyMMddHHmmssSSS"); return fmt.format(new Date()); } /** * <p class="detail"> * 功能：文件上傳 * </p> * * @param files * @param destDir * @throws Exception * @author wangsheng * @date 2014年9月25日 */ public void uploads(MultipartFile[] files, String destDir, HttpServletRequest request) throws Exception { String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path; try { fileNames = new String[files.length]; int index = 0; for (MultipartFile file : files) { String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1); int length = getAllowSuffix().indexOf(suffix); if (length == -1) { throw new Exception("請上傳允許格式的文件"); } if (file.getSize() > getAllowSize()) { throw new Exception("您上傳的文件大小已經(jīng)超出范圍"); } String realPath = request.getSession().getServletContext().getRealPath("/"); File destFile = new File(realPath + destDir); if (!destFile.exists()) { destFile.mkdirs(); } String fileNameNew = getFileNameNew() + "." + suffix;// File f = new File(destFile.getAbsoluteFile() + "\\" + fileNameNew); file.transferTo(f); f.createNewFile(); fileNames[index++] = basePath + destDir + fileNameNew; } } catch (Exception e) { throw e; } } /** *功能：文件上傳 * * @param file * @param destDir * @throws Exception * @author wangsheng * @date 2016年9月8日 */ public void upload(MultipartFile file, String destDir, HttpServletRequest request) throws Exception { String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path; try { String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1); int length = getAllowSuffix().indexOf(suffix); if (length == -1) { throw new Exception("請上傳允許格式的文件"); } if (file.getSize() > getAllowSize()) { throw new Exception("您上傳的文件大小已經(jīng)超出范圍"); } String realPath = request.getSession().getServletContext().getRealPath("/"); File destFile = new File(realPath + destDir); if (!destFile.exists()) { destFile.mkdirs(); } String fileNameNew = getFileNameNew() + "." + suffix; File f = new File(destFile.getAbsoluteFile() + "/" + fileNameNew); file.transferTo(f); f.createNewFile(); fileName = basePath + destDir + fileNameNew; } catch (Exception e) { throw e; } }} |
以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持服務(wù)器之家。
原文鏈接：http://www.cnblogs.com/gmq-sh/p/5852096.html
