採用HTTP協議上傳檔案實現(java)
阿新 • • 發佈：2019-01-15
{
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publicfinalstatic String DEFAULT_ENCODING ="ISO8859_1";
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publicfinalstatic String CHINESE_ENCODING ="GBK";
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publicfinalstatic String SIGN_BOUNDARY ="boundary=";
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publicfinalstatic String SIGN_FORMELEMENT ="name=";
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publicfinalstatic String SIGN_FORMFILE
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publicfinalstatic String SIGN_NOTFILE ="application/octet-stream";
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publicfinalstatic String SIGN_MULTIDATA ="multipart/form-data";
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publicfinalstatic String CHINESE_CONTENTTYPE ="text/html; charset=GBK";
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private Hashtable paratable =new Hashtable();
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private Hashtable filetable =new Hashtable();
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private String strBoundary ="";
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private String strSavePath="";
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privatestaticvoid println(String s) {
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System.out.println(s);
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} 66
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/** 71
* 增加資料到對應的Hashtable中
* 說明:如果Hashtable中已存在該鍵值，則將新增加的和原來的都封裝到列表中。
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* @param table
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* @param paraName
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* @param paraValue
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*/ 77
privatestaticvoid addElement(Hashtable table, String paraName,
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Object paraValue) {
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ArrayList list =new ArrayList();
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if (table.containsKey(paraName)) {
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Object o = table.get(paraName);
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if (o instanceof List) {
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((List) o).add(paraValue);
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}else{
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list.add(o);
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list.add(paraValue);
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o = list;
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} 89
table.put(paraName, o);
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}else{
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table.put(paraName, paraValue);
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} 93
} 94
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publicstatic String getHashInfo(Hashtable paratable){
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StringBuffer sb=new StringBuffer();
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Set keySet=paratable.keySet();
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Iterator it=keySet.iterator();
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while(it.hasNext()){
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Object keyobj=it.next();
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Object valueobj=paratable.get(keyobj);
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sb.append("<tr>");
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sb.append("<td>"+keyobj.toString()+"</td>");
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if(valueobj instanceof List){
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sb.append("<td>");
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int isize=((List)valueobj).size();
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for(int i=0;i<isize;i++){
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Object tempobj=((List)valueobj).get(i);
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if(i<isize-1){
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sb.append(tempobj.toString()+",");
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}114
else{
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sb.append(tempobj.toString());
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}117
}118
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sb.append("</td>");
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}121
else{
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sb.append("<td>"+valueobj.toString()+"</td>");
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}124
sb.append("</tr>");
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}126
return sb.toString();
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}128
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privatestaticbyte[] getfileBytes(InputStream is) {
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List byteList =new ArrayList();
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byte[] filebyte =null;
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int readbyte =0;
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try{
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while ((readbyte = is.read()) !=-1) {
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byteList.add(new Byte((byte) readbyte));
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}138
}catch (FileNotFoundException e) {
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e.printStackTrace();
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}catch (IOException e) {
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e.printStackTrace();
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}143
filebyte =newbyte[byteList.size()];
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for (int i =0; i < byteList.size(); i++) {
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filebyte[i] = ((Byte) byteList.get(i)).byteValue();
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}147
return filebyte;
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}150
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protectedvoid doGet(HttpServletRequest request,
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HttpServletResponse response) throws ServletException, IOException {
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doPost(request, response);
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}158
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protectedvoid doPost(HttpServletRequest request,
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HttpServletResponse response) throws ServletException, IOException {
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paratable =new Hashtable();
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filetable =new Hashtable();
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strSavePath=this.getInitParameter("savepath");
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File file=new File(strSavePath);
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if(!file.exists()){
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file.mkdirs();
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}168
String contentType = request.getContentType();
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strBoundary = getBoundary(contentType);
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ServletInputStream sis = request.getInputStream();
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BufferedInputStream bis =new BufferedInputStream(sis);
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parseInputStream(bis);
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appendPara(request.getParameterMap()); /*追加url對應傳遞的引數*/174
response.setContentType(CHINESE_CONTENTTYPE);
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// response.getWriter().write(getOutPutInfo());
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// response.getWriter().write(new String(getfileBytes(sis),"GBK"));178
bis.close();
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sis.close();
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request.setAttribute("para",paratable);
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request.setAttribute("file",filetable);
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this.getServletContext().getRequestDispatcher("/result.jsp").
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forward(request,response);
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}187
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/**190
* 不用Hashtable對應的put方法，目的避免覆蓋重複的鍵值
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* @return192
*/193
privatevoid appendPara(Map map){
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if(map!=null){
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Set keySet=map.keySet();
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Iterator it=keySet.iterator();
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while(it.hasNext()){
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Object keyobj=it.next();
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String[] valueobj=(String[])map.get(keyobj);
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println("keyobj===="+keyobj);
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println("valueobj===="+valueobj);
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for(int i=0;i<valueobj.length;i++){
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addElement(paratable,(String)keyobj,valueobj[i]);
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}206
}207
}<
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publicfinalstatic String DEFAULT_ENCODING ="ISO8859_1";39
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publicfinalstatic String CHINESE_ENCODING ="GBK";41
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publicfinalstatic String SIGN_BOUNDARY ="boundary=";43
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publicfinalstatic String SIGN_FORMELEMENT ="name=";45
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publicfinalstatic String SIGN_FORMFILE 47
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publicfinalstatic String SIGN_NOTFILE ="application/octet-stream";49
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publicfinalstatic String SIGN_MULTIDATA ="multipart/form-data";51
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publicfinalstatic String CHINESE_CONTENTTYPE ="text/html; charset=GBK";53
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private Hashtable paratable =new Hashtable();56
private Hashtable filetable =new Hashtable();57
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private String strBoundary ="";59
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private String strSavePath="";61
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privatestaticvoid println(String s) {64
System.out.println(s);65
} 66 67
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/** 71 * 增加資料到對應的Hashtable中 * 說明:如果Hashtable中已存在該鍵值，則將新增加的和原來的都封裝到列表中。73
* @param table 74
* @param paraName75
* @param paraValue76
*/ 77 privatestaticvoid addElement(Hashtable table, String paraName,78
Object paraValue) {79
ArrayList list =new ArrayList();80
if (table.containsKey(paraName)) {81
Object o = table.get(paraName);82
if (o instanceof List) {83
((List) o).add(paraValue);84
}else{85
list.add(o);86
list.add(paraValue);87
o = list;88
} 89 table.put(paraName, o);90
}else{91
table.put(paraName, paraValue);92
} 93 } 9495
publicstatic String getHashInfo(Hashtable paratable){96
StringBuffer sb=new StringBuffer();97
Set keySet=paratable.keySet();98
Iterator it=keySet.iterator();99
while(it.hasNext()){100
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Object keyobj=it.next();102
Object valueobj=paratable.get(keyobj);103
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sb.append("<tr>");105
sb.append("<td>"+keyobj.toString()+"</td>");106
if(valueobj instanceof List){107
sb.append("<td>");108
int isize=((List)valueobj).size();109
for(int i=0;i<isize;i++){110
Object tempobj=((List)valueobj).get(i);111
if(i<isize-1){112
sb.append(tempobj.toString()+",");113
}114 else{115
sb.append(tempobj.toString());116
}117 }118 119
sb.append("</td>");120
}121 else{122
sb.append("<td>"+valueobj.toString()+"</td>");123
}124 sb.append("</tr>");125
}126 return sb.toString();127
}128 129
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privatestaticbyte[] getfileBytes(InputStream is) {131
List byteList =new ArrayList();132
byte[] filebyte =null;133
int readbyte =0;134
try{135
while ((readbyte = is.read()) !=-1) {136
byteList.add(new Byte((byte) readbyte));137
}138 }catch (FileNotFoundException e) {139
e.printStackTrace();140
}catch (IOException e) {141
e.printStackTrace();142
}143 filebyte =newbyte[byteList.size()];144
for (int i =0; i < byteList.size(); i++) {145
filebyte[i] = ((Byte) byteList.get(i)).byteValue();146
}147 return filebyte;148
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}150 151
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protectedvoid doGet(HttpServletRequest request,155
HttpServletResponse response) throws ServletException, IOException {156
doPost(request, response);157
}158159
protectedvoid doPost(HttpServletRequest request,160
HttpServletResponse response) throws ServletException, IOException {161
paratable =new Hashtable();162
filetable =new Hashtable();163
strSavePath=this.getInitParameter("savepath");164
File file=new File(strSavePath);165
if(!file.exists()){166
file.mkdirs();167
}168 String contentType = request.getContentType(); 169
strBoundary = getBoundary(contentType);170
ServletInputStream sis = request.getInputStream();171
BufferedInputStream bis =new BufferedInputStream(sis);172
parseInputStream(bis);173
appendPara(request.getParameterMap()); /*追加url對應傳遞的引數*/174 response.setContentType(CHINESE_CONTENTTYPE);175
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// response.getWriter().write(getOutPutInfo());177
// response.getWriter().write(new String(getfileBytes(sis),"GBK"));178 bis.close();179
sis.close();180
request.setAttribute("para",paratable);181
request.setAttribute("file",filetable);182
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this.getServletContext().getRequestDispatcher("/result.jsp").184
forward(request,response);185
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}187 188
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/**190 * 不用Hashtable對應的put方法，目的避免覆蓋重複的鍵值191
* @return192 */193 privatevoid appendPara(Map map){194
195
if(map!=null){196
Set keySet=map.keySet();197
Iterator it=keySet.iterator();198
while(it.hasNext()){199
Object keyobj=it.next();200
String[] valueobj=(String[])map.get(keyobj);201
println("keyobj===="+keyobj);202
println("valueobj===="+valueobj);203
for(int i=0;i<valueobj.length;i++){204
addElement(paratable,(String)keyobj,valueobj[i]);205
}206 }207 }<