CODE:
?qCLAy}zv --------------------------------------------------------------------------------
]p?b u@f_ < !-- -- -- -- -- -- -- -- -- -- -- -- -- --servlet-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -->
:;B?Nh 4O package Photo;
ctWgp)' import javax.servlet.*;
?R QQWd import javax.servlet.http.*;
t0(o}4J) import java.io.*;
Kll] 73 import java.util.*;
6$FXrB<YAJ import java.lang.*;
7 T%nJA0k import java.sql.*;
k@mSsf+"% 29k, 6 /**
!lD$V * <p>Title: </p>
6/a.|e7rdG * <p>Description: </p>
_R x =Wd * <p>Copyright: Copyright (c) 2002</p>
&)pyg_`l" * <p>Company: </p>
qzGPnE1Y * @author unascribed
kxzHNG:< * @version 1.0
{o#]`NG */
Li'A!Q0= :LUV@3/ public class ShowImage extends HttpServlet {
q' i^0]z private static final String CONTENT_TYPE = "image/*";
.f'DbZ /**
R]|!tnn ry * 定义数据库连接字符串,jdbc.odbc桥
#Eri\n6AC */
hoL OBt* private String driver_class = "oracle.jdbc.driver.OracleDriver";
52#)~$ private String connect_string =
0#p[.l "jdbc:oracle:thin:xxw/xxw@192.168.1.50:1521:ORCL";
P !b 7v Connection conn = null;
^i0\gw| ResultSet rs = null;
E&pDg9sOd Statement stmt = null;
*W@"F^VB /********************************************
1brv+YqR * 定义应用变量
)Te*?#0 ******************************************/
Y> Czk private String SQLString = ""; //定义查询语句
mZ23&28 public String M_EorrMenage = ""; //定义错误信息变量
^V}!C8Os private InputStream in = null; //定义输入流
Eew:l~ private int len = 10 * 1024 * 1024; //定义字符数组长度
6dx*+M7$> YK eY; //Initialize global variables
&Y>|goRI+ public void init() throws ServletException {
Vrcz@Xs.] /**
uuhD:ef * 连接数据库
Y?bFBbF2g */
CV/t4 z=m1 try {
[RbgX~R Class.forName(driver_class);
&^YIDv} } catch (java.lang.ClassNotFoundException e) {
d#WwvvI //异常
_JQ!(C % System.err.println("databean():" + e.getMessage());
]Q.]yf& }
],'\kU{Gr }
-D_*(&g //Process the HTTP Get request
wqCl public void doGet(HttpServletRequest request, HttpServletResponse response)
*#rAuuK\e throws ServletException, IOException {
Hf29LcG 2i response.setContentType(CONTENT_TYPE);
cQwStm PrintWriter out = response.getWriter();
jh{Y.n& //在数据库中的照片的ID
${kR|; B int PHOTOID = 0;
vG_*t? /*********************************************
mT DsSO4 * 接受上文传递的图片ID号
kFb(|dN& * 上文传输文件名称为photoid
b+igT1eg *********************************************/
6N "VcjA*& try {
aHbHP |?F~NX PHOTOID = Integer.parseInt(request.getParameter("photoid"));
;VJW~6q SQLString = "select * from xxw_photo where p_id=" + PHOTOID;
f4vF|D/ GRnldVbZ$ } catch (Exception e) {
&S_57h~h e.printStackTrace();
Pm~w<F response.setContentType("text/html; charset=gb2312");
H Zvo6=yj8 M_EorrMenage = "请输入图片ID号";
m<G\k M_EorrMenage =
UHjYBb1lj new String(M_EorrMenage.getBytes("ISO8859_1"), "GBK");
5)qXz|c:& out.println("<%@ page contentType='text/html; charset=gb2312' %>");
J18aW`L7_O out.println("<html>");
YH|o]YJ out.println("<head><title>id</title></head>");
-NB^f7}8 out.println("<body>");
A$nZllk` out.println("<p>" + M_EorrMenage + "</p>");
D>A6 /mOd out.println("</body></html>");
}0#xejL~u 3!{p }
c4' 9jz}G /*****************************************************
X;3|) * 执行查询语句
n.18D/@7< *****************************************************/
7O8Iu\? try {
gy C{DaF conn = DriverManager.getConnection(connect_string);
]}Sym?t$ stmt = conn.createStatement();
0<_:{^{^^ rs = stmt.executeQuery(SQLString);
~:{K|Go } //try
0p?'Aee catch (SQLException ex) {
$"F.v System.err.println("aq.executeUpdate:" + ex.getMessage());
<~@ a< M_EorrMenage = "对不起,数据库无法完成此操作!";
EG#Z;<Zw+g M_EorrMenage =
qDSu^H new String(M_EorrMenage.getBytes("ISO8859_1"), "GBK");
EJ}6<vX2 response.setContentType("text/html; charset=gb2312");
i:-BMa) out.println("<html>");
!eI~O H7ny out.println("<head><title>no_database</title></head>");
j8VKH=:6 out.println("<body>");
_1FPUs out.println("<p>" + M_EorrMenage + "</p>");
Dl-'= out.println("</body></html>");
9 |].keb cyf0PHh' }
c#R'H47Q /*********************************************
cz5P QQ * 将图片流读入字符数组中,并显示到客户端
ZSH9 o&b ********************************************/
{,5zw Z` try {
dy>#Eg if (rs.next()) {
pA^U\"*;WD in = rs.getBinaryStream("photo");
MH N7C("Z response.reset(); //返回在流中被标记过的位置
%ydzX~U response.setContentType("image/jpg"); //或gif等
ouH$S+ // int len=in.available();//得到文件大小
O3;W$lV OutputStream toClient = response.getOutputStream();
!lG11R - byte[] P_Buf = new byte[len];
wsYs0c9 int i;
Y.X Pp while ((i = in.read(P_Buf)) != -1) {
;(4CGn5kF toClient.write(P_Buf, 0, i);
9_*5Yy?WG }
c8Pv{NyLR in.close();
47JmDr_cx toClient.flush(); //强制清出缓冲区
&eh'pHg toClient.close();
w e2)G=Z } else {
,`o| 9:g= M_EorrMenage = "无此图片!";
446&R<@; M_EorrMenage =
|ZEiv;6& new String(M_EorrMenage.getBytes("ISO8859_1"), "GBK");
`\.1r+ response.setContentType("text/html; charset=gb2312");
m:AT&+2! out.println("<html>");
Soi]^f{ #| out.println(
E4*KOB~}2 "<head><title>this photo isn't have</title></head>");
x+9cq6QRX out.println("<body>");
IdblA.% out.println("<p>" + M_EorrMenage + "</p>");
*Mf+iT out.println("</body></html>");
!5af3gl }
?y|E,h rs.close();
3|J2Z(< } catch (Exception e) {
6E4iZg, e.printStackTrace();
$F4k*A-_R M_EorrMenage = "无法读取图片!";
=Tnw[2qt M_EorrMenage =
n [^} new String(M_EorrMenage.getBytes("ISO8859_1"), "GBK");
mPVY}pe response.setContentType("text/html; charset=gb2312");
PH 0vLN out.println("<%@ page contentType='text/html; charset=gb2312' %>");
+wYg+x out.println("<html>");
Qw+@72. out.println("<head><title>no photo</title></head>");
_c!F9UIy out.println("<body>");
,!@NKsx out.println("<p>" + M_EorrMenage + "</p>");
nD** out.println("</body></html>");
%3a_ }
p/aO?L9 }
=+qP|]FSS .!?j\(VG //Clean up resources
9k&7w?hg public void destroy() {
anYn^-| try {
:m:!O9pP conn.close();
Whr-A>7- } catch (SQLException e) {
3=bn$CP[&4 System.err.println("aq.executeUpdate:" + e.getMessage());
& Kf x`] M_EorrMenage = "对不起,数据库无法完成此操作!";
EF/*^ }
uzQp~rF }
Y[*h }
w[@y>OHgA4 --------------------------------------------------------------------------------
t.ynJhA`< L3}Uc0 <!---------------------------显示---------------------------------------------->
/WeAF:d3p <html>
S7,bK*JVlg <head>
iy=Qd$2 <title>Untitled Document</title>
O`zwBa </head>
9D i@ <body bgcolor="#FFFFFF" text="#000000">
-_-O K` <table>
Qj18 @F; <%
kwoCH%90 int i=1;
(,T`w]pn while(i<3){
m ~yMi-h[+ %>
o# (V+F <tr>
-u7e 2 <td colspan="3"> <img border="1" src="
http://192.168.1.50:8100/ShowImage?photoid=<%=i%>"></td>
*\"7x4 </tr>
FDpdCji <%
}V;6mS&E( i++;
@_Sa e }
7<YI-"tz %>
YGf^SBCa </table>
z5,L! </body>
]+@u0~-P </html>