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第12章网络留言板（JSP+Servlet+JavaBean）

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电梯直达

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发表于 2014-04-26 11:36:54 |只看该作者 |倒序浏览

代码案例：

package com.cjg.servlet;& Z# c6 J' A- T1 A( p
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import java.io.IOException;
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import java.text.SimpleDateFormat;
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import javax.servlet.ServletException;
import javax.servlet.http.*;! n. q! y; D* {3 j! d; ~
import com.cjg.tool.*;) n& F( P, V) v* L3 d( X
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public class AddMessageServlet extends HttpServlet {
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private static final long serialVersionUID = -8349454122547148005L;
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public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {; Q& I- o) I9 ^2 ?) m
String sql = "insert into guestbook (id,name,email,phone,title,content,time) values(gb_seq.nextval,?,?,?,?,?,?)";7 z' o2 m2 u. ~ i6 F, d+ }
int result = 0;4 k- I- t3 Y* x6 z
String message = "";6 E- @ f1 \' \' y9 A& [
String name = request.getParameter("name");& r0 ^& O8 n- _" c; g& Y
String title = request.getParameter("title");1 S5 L$ ^$ B3 j/ V
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if (StringTool.validateNull(name)) { T% t) N9 s- l: @2 {& Q R- u, F w
message = "对不起，姓名不能为空，请您重新输入！<br>";; e! a- p/ ?4 D$ Z, e! F
} else if (StringTool.validateNull(title)) {0 l: c5 g( P" Z1 e. _
message = "对不起，主题不能为空，请您重新输入！<br>";! z6 P9 A' d& o: a* Y
} else {
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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String param[] = { StringTool.filterHtml(name), StringTool.filterHtml(request.getParameter("email")),
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StringTool.filterHtml(request.getParameter("phone")), StringTool.filterHtml(title),. q0 W: O! X+ V; Z* M; Q
request.getParameter("content"), sdf.format(new java.util.Date()) };
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OracleTool db = new OracleTool("java:/comp/env/jdbc/oracleds");% }2 f0 X7 G5 [; l; L
db.init();
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result = db.update(sql, param);
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if (result == 0) {
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message = "对不起，添加留言不成功，请您重新输入！";
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} else {
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message = "祝贺您，成功添加留言。";
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}
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request.setAttribute("message", message);) Z; }! J. u+ @* \2 c
request.getRequestDispatcher("/addResult.jsp").forward(request, response);
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}
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package com.cjg.servlet;4 U- f- H* G. D% A, l6 W$ a, u% A% @
import java.io.IOException;8 H! \1 g1 A3 p
import java.util.List;3 ]( h1 x3 q- ~( U/ L9 g
import javax.servlet.ServletException;
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import javax.servlet.http.*;
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import org.apache.commons.dbutils.handlers.BeanListHandler;- Z7 n& V8 W7 `7 Y
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import com.cjg.tool.OracleTool;9 q; u4 h3 a! x4 Q
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public class ManageServlet extends HttpServlet {
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OracleTool db = null;
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private static final long serialVersionUID = 204655027689309554L;
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public void edit(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {, F- k1 _& Q4 b; s, r8 n# R
String params[] = { request.getParameter("id") };
String sql = "select * from guestbook where id=?";
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List list = (List) db.query(sql, params, new BeanListHandler(MessageBook.class));: Y: ]: s4 K6 M; h4 T* X- X
request.setAttribute("guestbook.admin.edit", list.get(0)); ( Y+ O- K/ l. V( V4 ]
request.getRequestDispatcher("/admin/secure/edit.jsp").forward(request, response);. l. x3 S6 ?) u
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public void update(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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String params[] = { request.getParameter("name"), request.getParameter("email"), request.getParameter("phone"),! ]# x. L# R" S! R4 E9 y
request.getParameter("title"), request.getParameter("content"), request.getParameter("id") };
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int i = db.update("update guestbook set name=?,email=?,phone=?,title=? ,content=? where id=?", params);
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if (i == 1) {: Q: l* G2 k8 x5 ^& W8 o
request.setAttribute("guestbook.admin.update.message", "更新成功！");
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MessageBook gb = new MessageBook();
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gb.setId(Integer.parseInt(request.getParameter("id"))); T+ Z5 q. n; K5 N( h1 E, [
gb.setName(request.getParameter("name"));! i$ z, J; D+ u( C2 K
gb.setEmail(request.getParameter("email"));
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gb.setPhone(request.getParameter("phone"));0 Y; N/ Q% V! R( I+ e
gb.setTitle(request.getParameter("title"));
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gb.setContent(request.getParameter("content"));
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request.setAttribute("guestbook.admin.edit", gb);8 v" o6 B {2 A% q, ?8 _; H
} else {* ?9 {1 h/ E, ]: Y; p' _: F$ }
request.setAttribute("guestbook.admin.update.message", "更新失败！");; \% P9 T' o5 E$ _5 {' X
} request.getRequestDispatcher("/admin/secure/updateResult.jsp").forward(request, response);
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}
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public void delete(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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String params[] = { request.getParameter("id") };
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int i = db.update("delete from guestbook where id=?", params);
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if (i == 1) {
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request.setAttribute("guestbook.admin.delete.message", "删除成功");! l) }2 v/ K9 v Q Z% x
} else {8 H) {% \! \6 d: }4 M5 W( V
request.setAttribute("guestbook.admin.delete.message", "删除失败");' L/ }( i! S i& X
} request.getRequestDispatcher("/admin/secure/deleteResult.jsp").forward(request, response);
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}
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public void list(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {/ F$ b1 M `- Y' h2 N- U
List list = (List) db.query("select id,name,title from guestbook order by id desc", null, new BeanListHandler(
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MessageBook.class));% `0 s5 W( T$ n4 z7 Q
request.setAttribute("guestbook.admin.list", list);
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request.getRequestDispatcher("/admin/secure/list.jsp").forward(request, response);4 g8 H0 j& q0 ^
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public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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db = new OracleTool("java:/comp/env/jdbc/oracleds");
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db.init();6 V7 V" X6 f* B& }
String method = request.getParameter("q");* Y9 l8 U1 R; B2 O. l' M
if(method==null){ V. I$ U$ G% r4 n3 @
method="list";
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} , a/ i/ U1 r. R! @
if (method.equals("edit")) {8 l- Z* @* B: `
edit(request, response);( x, h. Y4 M& B% D- H; Q
} else if (method.equals("delete")) {
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delete(request, response);
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} else if (method.equals("update")) {
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update(request, response);4 d' O; U% s5 ?4 A: q
} else {% A% p3 r2 ]; W% o7 [
list(request, response);2 d& ? i; K# r; W+ P' b
}! K9 _1 o' r; W+ X2 e
}
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public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {: K# t7 c$ W0 q1 p \% p& i/ C1 u2 J6 D
doGet(request, response);5 Q ^5 K* e$ q b
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}
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