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2005-08-05? ?來源:CSDN ?作者:CMTobby
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最近參與了一個網(wǎng)上直報項目的維護工作，該網(wǎng)上直報應用程序有一個功能就是通過導入文本文檔的方式向后臺數(shù)據(jù)庫中批量導入直報用戶，包括用戶各項信息如單位名稱、企業(yè)資質等級等等。其核心之處就是如何獲取所上載文本文檔中的內容，現(xiàn)將該部分程序簡單介紹如下：
??????? 首先是后臺的javabean程序如下所示：
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package
?Util;
import
?javax.servlet.
*
;
import
?javax.servlet.http.HttpServletRequest;
import
?java.util.LinkedList;
import
?java.io.
*
;
public
?
class
?ReadRequest{
?
public
?LinkedList?getRequest(HttpServletRequest?request){
??LinkedList?output
=
new
?LinkedList();
??
try
{
??????ServletInputStream?in
=
request.getInputStream();
??????
int
?len
=
request.getContentLength();
??????System.out.println?(len);
??????
byte
?[]b
=
new
?
byte
[len];
??????in.read(b,
0
,len);
??????String?str
=
new
?String(b);
??????System.out.println?(str);
??????BufferedReader?con
=
new
?BufferedReader(
new
?StringReader(str));
??????String?c
=
""
;
??????
while
((c
=
con.readLine())
!=
null
){
???????output.add(c);
??????????????????????????????????}
?????????}
?????
catch
(Exception?e){e.printStackTrace();}
?????
return
?output;
????????????????????????????????????????????????????}
????????????????}
然后是寫相應的jsp測試頁面，此頁面沒有經(jīng)過美工處理，僅為測試之用：）。
??????? index.jsp
<%
@?page?contentType
=
"
text/html;?charset=gb2312
"
?language
=
"
java
"
?
import
=
"
java.sql.*
"
?errorPage
=
""
?
%>
<!
DOCTYPE?HTML?PUBLIC?
"
-//W3C//DTD?HTML?4.01?Transitional//EN
"
?
"
http://www.w3.org/TR/html4/loose.dtd
"
>
<
jsp:useBean?id
=
"
pn
"
?scope
=
"
page
"
?
class
=
"
Util.ReadRequest
"
/>
<%--<
jsp:useBean?id
=
"
pn
"
?scope
=
"
request
"
?
class
=
"
Util.GetFile
"
/>--%>
<%
@?page?
import
=
"
java.util.*
"
%>
<
html
>
<
head
>
<
meta?http
-
equiv
=
"
Content-Type
"
?content
=
"
text/html;?charset=gb2312
"
>
<
title
>
測試
</
title
>
</
head
>
<
body
>
<
form?name
=
"
form1
"
?action
=
"
index.jsp
"
?method
=
"
post
"
?enctype
=
"
multipart/form-data
"
>
?
<
input?name
=
"
sdf
"
?type
=
"
file
"
><
input?name
=
"
aa
"
?type
=
"
submit
"
?value
=
"
提交
"
>
?
?
<%
?
LinkedList?output
=
new
?LinkedList();
output
=
pn.getRequest(request);
//
output=pn.readHttpData(request);
System.out.println(output.size());
for
(
int
?i
=
0
;i
<
output.size();i
++
){
????out.println(output.get(i)
+
"
<br>
"
);
???????????????????????????????????????????????????}
?
%>
</
form
>
</
body
>
</
html
>
這樣就會輸出文檔中的內容來了，當然還有一些其他的內容，可根據(jù)實際需要對內容進行處理。需要注意的是，在該網(wǎng)上直報程序中，文檔的格式是有要求的，每行為一個公司的基本信息，各個屬性之間用“，”隔開（也可以是其他的符號如“@”），并且各個屬性出現(xiàn)的順序也是固定的（如必須第一項是法人代碼，第二項是公司名稱）。得到了文檔中的內容后，就可以用一個循環(huán)批量的插入用戶信息了。比如說，我上載的文本文檔內容如下所示：
??????? 300000000,武漢,420101,230,A304,A211,4700
??????? 300000001,武漢,420101,230,A304,A211,4700
??????? 300000002,武漢,420101,230,A304,A211,4700
??????? 300000003,武漢,420101,230,A304,A211,4700
首先對output進行處理，把前面的http頭內容如：Content-Disposition: form-data; name="sdf"; filename="C:\Documents and Settings\yy\桌面\test_jz.txt"以及尾remove掉，現(xiàn)在的output就只有文檔中的內容了。然后就開始插入數(shù)據(jù)庫（只給出代碼片斷）：
//以下代碼僅適合本人的例子，具體情況具體而定
for
(
int
?i
=
0
;i
<
output.size();i
++
){
?
if
?(output.get(i)?
==
?
null
?
||
?(?(String)?output.get(i)).equals(
""
))?{
??????????
continue
;?
//
空行則自動換行????????}
?String?s?
=
?(String)?output.get(i);?
//
取得一行?String[]?ss?=?s.split(",");
?String?sql
=
"
insert?into?xt_user(f001,f002,f003,f004,f005,f006)?values(?,?,?,?,?,?)
"
;
?PreparedStatement?ps
=
con.prepareStatement(sql);
?ps.setString(
1
,ss[
0
]);
?ps.setString(
2
,ss[
1
]);
?ps.setString(
3
,ss[
2
]);
?ps.setString(
4
,ss[
3
]);
?ps.setString(
5
,ss[
4
]);
?ps.setString(
6
,ss[
5
]);
?ps.executeUpdate();
?????????????????????????????}