package servlet;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class File extends HttpServlet {
private static final long serialVersionUID = 1L;
public File() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out=response.getWriter();
request.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
char[] hchl={13,10}; //回車換行符
String boundary=request.getContentType().substring(30);
System.out.println("分界:"+boundary);
String field_boundary="--"+boundary+new String(hchl);//開始時的分隔符
String last_boundary="--"+boundary+"--"+new String(hchl);//結束時的分隔符
String _msg="";
ServletInputStream getdata=request.getInputStream();
ByteArrayOutputStream temp=new ByteArrayOutputStream();
byte[] data_line=new byte[1024];
int line_byte_count=0;
boolean found_boundary=false; //是否讀完的標記
while((line_byte_count=getdata.readLine(data_line,0,data_line.length))!=-1){
if(!found_boundary){
line_byte_count=getdata.readLine(data_line,0,data_line.length);
}
String temp_str=new String(data_line,0,line_byte_count);
if(temp_str.indexOf("filename")!=-1){ //找一行中filename的位置,沒有則返回-1,在這裏是找到有filename的那一行
if(temp_str.substring(temp_str.indexOf("filename=")+9,temp_str.lastIndexOf("/"")+1).length()>2){
String file_name = null;
if(temp_str.indexOf("//")!=-1)
file_name=temp_str.substring(temp_str.lastIndexOf("//")+1,temp_str.lastIndexOf("/""));
else{
file_name=temp_str.substring(temp_str.indexOf("filename=")+10, temp_str.lastIndexOf("/""));
}
line_byte_count=getdata.readLine(data_line,0,data_line.length); //這一行大概是Content-Type:
line_byte_count=getdata.readLine(data_line,0,data_line.length); //這一行是空的
FileOutputStream myfile=new FileOutputStream("e://xx//upload//"+file_name,false); //文件存放目錄
boolean test=true;
while(test) {
line_byte_count=getdata.readLine(data_line,0,data_line.length);
if(line_byte_count==-1){
test=false;
break;
}
if(temp.size()==0){
temp.write(data_line,0,line_byte_count);
}else{
if(new String(data_line,0,line_byte_count).equals(field_boundary) || new String(data_line,0,line_byte_count).equals(last_boundary)){
myfile.write(temp.toByteArray(),0,temp.toByteArray().length-2);
temp.reset();
myfile.close();
//out.println(file_name+"上傳成功了 <br>");
_msg=_msg+file_name+"上傳成功<br>";
test=false;
found_boundary=true;
}else{
temp.writeTo(myfile);
temp.reset();
temp.write(data_line,0,line_byte_count);
}
}
}
}else{
String field_name=temp_str.substring(temp_str.indexOf("name")+6,temp_str.lastIndexOf(";")-1);
line_byte_count=getdata.readLine(data_line,0,data_line.length);
line_byte_count=getdata.readLine(data_line,0,data_line.length);
line_byte_count=getdata.readLine(data_line,0,data_line.length);
line_byte_count=getdata.readLine(data_line,0,data_line.length);
found_boundary=true;
// out.println(field_name+"沒有選擇上傳文件! <br>");
// _msg=_msg+field_name+"沒有選擇上傳文件<br>";
}
} else{
String field_name=temp_str.substring(temp_str.indexOf("name")+6,temp_str.lastIndexOf("/""));
line_byte_count=getdata.readLine(data_line,0,data_line.length);
temp.reset();
boolean test=true;
while(test) {
line_byte_count=getdata.readLine(data_line,0,data_line.length);
if(line_byte_count==-1){
test=false;
break;
}
if(new String(data_line,0,line_byte_count).equals(field_boundary) || new String(data_line,0,line_byte_count).equals(last_boundary)){
test=false;
found_boundary=true;
if(temp.size()>2){
// out.println(field_name+":"+new String(temp.toByteArray())+" <br>");
_msg=_msg+field_name+":"+new String(temp.toByteArray())+"<br>";
}else{
// out.println(field_name+"沒有內容! <br>");
_msg=_msg+field_name+"沒有內容!<br>";
}
temp.reset();
}else{
temp.write(data_line,0,line_byte_count);
}
}
}
}
getdata.close();
out.println("<script>window.parent.Finish('"+_msg+"');</script>");
}
}
關於截上傳文件流
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