1 package com.khan.web;
2
3 import java.io.DataInputStream;
4 import java.io.File;
5 import java.io.FileNotFoundException;
6 import java.io.FileOutputStream;
7 import java.io.IOException;
8 import javax.servlet.http.HttpServletRequest;
9 import java.io.*;
10 import java.util.HashMap;
11
12
13 public class uploadFile {
14 public static final int MAX_SIZE = 1024 * 1024*100;
15 public static final String FILE_DIR = "d:/temp/";
16
17 private int file_Size=0;
18 private String file_Path = "";
19 private HashMap hm = new HashMap();
20
21 public String upLoad(HttpServletRequest req) {
22 String tmpString ="";
23 String result = "";
24 DataInputStream dis = null;
25 String split_Str = "";
26
27 try {
28 dis = new DataInputStream(req.getInputStream());
29 String content = req.getContentType();
30 if (content != null && content.indexOf("multipart/form-data") != -1) {
31
32 int reqSize = req.getContentLength();
33 byte[] data = new byte[reqSize];
34 int bytesRead = 0;
35 int totalBytesRead = 0;
36 int sizeCheck = 0;
37 while (totalBytesRead < reqSize) {
38 // check for maximum file size violation
39 sizeCheck = totalBytesRead + dis.available();
40 if (sizeCheck > MAX_SIZE)
41 result = "文件太大不能上传
";
42
43 bytesRead = dis.read(data, totalBytesRead, reqSize);
44 totalBytesRead += bytesRead;
45 }
46 String dataString = null;
47 //dataString = new String(data, "ISO-8859-1");
48 dataString = new String(data);
49 tmpString = new String(data);
50 hm = parseAnotherParam(tmpString);
51
52 //取出字段分割符
53 split_Str = dataString.substring(0, dataString.indexOf("\r\n"));
54 // 分离filepath 并赋值
55 dataString = dataString.substring(dataString.indexOf("filename=\""));
56 String filePath = dataString.substring(0, dataString.indexOf("Content-Type:"));
57 if (filePath==null && filePath.equals("")) return "";
58 //System.out.println(filePath);
59 dataString = new String(dataString.getBytes(),"ISO-8859-1");
60 // 分离contentType 并赋值
61 dataString = dataString.substring(dataString.indexOf("Content-Type:") + 1);
62 dataString = dataString.substring(dataString.indexOf("\n") + 1);
63 // 分离文件信息 获得最终想要的字节
64 //System.out.print("|"+dataString+"|");
65 dataString = dataString.substring(2, dataString.indexOf(split_Str));
66 //System.out.println("|"+dataString+"|");
67 dataString = dataString.substring(0, dataString.lastIndexOf("\n") - 1);
68 //System.out.print("|"+dataString+"|");
69 if (writeFile(dataString.getBytes("ISO-8859-1"), FILE_DIR + getFileName(filePath))) {
70 this.file_Size = dataString.getBytes("ISO-8859-1").length;
71 this.file_Path = FILE_DIR + getFileName(filePath);
72 result = "文件上传完毕";
73 } else {
74 result = "文件上传失败";
75 }
76 } else {
77 result = "content 必须为 multipart/form-data";
78 }
79 } catch (UnsupportedEncodingException ex4) {
80 result = "getBytes 失败 UnsupportedEncodingException错误";
81 } catch (NullPointerException e) {
82 result = "getBytes 失败 NullPointerException错误";
83 } catch (IOException ex1) {
84 result = "IOException 错误 ";
85 }
86
87 return result;
88 }
89
90 public String getFilePath(){
91 return this.file_Path;
92 }
93
94 public int getFileSize(){
95 return this.file_Size;
96 }
97
98 public boolean writeFile(byte[] data, String path) {
99 File f = null;
100 FileOutputStream fos = null;
101 try {
102 f = new File(path);
103 f.createNewFile();
104 fos = new FileOutputStream(f);
105 fos.write(data, 0, data.length);
106 } catch (FileNotFoundException e) {
107 return false;
108 } catch (IOException e) {
109 return false;
110 } finally {
111 try {
112 fos.close();
113 } catch (IOException e) {
114 return false;
115 }
116 }
117 return true;
118 }
119
120 public String getFileName(String arg) {
121 String path = "";
122 if (arg.indexOf("\"") > -1)
123 path = arg.substring(arg.indexOf("\"") + 1, arg.lastIndexOf("\""));
124 else
125 path = arg;
126 //System.out.println("file_path:"+arg);
127 path = path.substring(path.lastIndexOf("\\") + 1);
128 return path;
129 }
130
131
132 public HashMap parseAnotherParam(String str){
133 HashMap hm= new HashMap();
134 String key="";
135 String value="";
136 int startindex = 0;
137 int endindex = 0;
138
139 startindex = str.indexOf("Content-Disposition: form-data; name=\"") + "Content-Disposition: form-data; name=\"".length();
140 endindex = str.indexOf("\"\r\n\r\n");
141
142 while ( startindex >-1 && endindex > -1 ){
143 key = str.substring(startindex, endindex);
144
145 if(!str.substring(endindex , endindex + 5).equals("\"\r\n\r\n") ){//去掉没有value的元素
146 str = str.substring(endindex);
147 startindex = str.indexOf("Content-Disposition: form-data; name=\"") + "Content-Disposition: form-data; name=\"".length();
148 endindex = str.indexOf("\"\r\n\r\n");
149 continue;
150 }
151 if( key.indexOf("\";") > -1){//去掉上传文件的参数以及编码
152 str = str.substring(str.indexOf("\";") + 2);
153 startindex = str.indexOf("Content-Disposition: form-data; name=\"") + "Content-Disposition: form-data; name=\"".length();
154 endindex = str.indexOf("\"\r\n\r\n");
155
156 continue;
157 } else
158 str = str.substring(endindex + 5);
159
160 value = str.substring(0, str.indexOf("\r\n"));
161 str = str.substring(str.indexOf("\r\n") + 2);
162 //System.out.println("key:"+key+" value:"+value);
163 hm.put(key,value);
164
165 startindex = str.indexOf("Content-Disposition: form-data; name=\"") + "Content-Disposition: form-data; name=\"".length();
166 endindex = str.indexOf("\"\r\n\r\n");
167
168 }
169 return hm;
170 }
171
172 public String getParameter(String param){
173 //System.out.println(hm.toString());
174 return (String)hm.get(param);
175 }
176
177
178 }