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- package s2.jsp.zhangixao.dao;
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- import java.sql.Connection;
& l% S) }( l" ]9 y/ |0 ^# t - import java.sql.DriverManager;
+ |2 e- i) K+ ?6 X. C - import java.sql.PreparedStatement;
' T: ]0 w5 M/ r v! w - import java.sql.ResultSet;
& B9 S: T# h+ \9 a2 q5 a - import java.sql.SQLException;* A! q/ I, z0 R* |9 A) Y
- /**1 |$ j. M7 f6 D0 y. W
- * 访问数据库
0 W: K9 L8 l' |6 j; L7 H - * @author Administrator9 }1 ~1 S/ G. s2 i4 e. X- w0 p. d
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- */2 y% z4 d8 _# |! e5 X
- public class MessageBase {# K3 j/ z4 O8 p8 h% `7 H
- private static final String DRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";9 V) J" O( a2 y* M& M
- private static final String URL="jdbc:sqlserver://localhost:1433;DataBaseName=messageboard";- j6 i! b2 D6 l! t& p
- private static final String DBNAME="sa";/ `$ F6 |. H2 N! t2 Q6 j2 e- ~; K
- private static final String DBPASS="";
: y; Z) F0 h2 h* w- F% b - /**8 \2 {3 W9 _; H
- * 连接数据库: [4 q3 L2 A+ P: z8 J0 V/ F* |
- * @return7 X) _3 I) J1 [' h0 `/ V8 z: m
- */8 r: L; Q3 ^3 S% n& m( Q) J8 v5 m
- public static Connection getConnection(){. j" x; o' U4 ]2 x" ?
- Connection con=null;* v/ |* Z& I# a: v
- try {8 V, n. H |! W" V0 e, y
- Class.forName(DRIVER);4 o% L1 v( ] G5 X% m
- con=DriverManager.getConnection(URL,DBNAME,DBPASS);2 n- L3 A9 R) v: w F
- } catch (ClassNotFoundException e) {
" b4 p3 Q& J; b/ E u - System.out.println("加载驱动出现异常");. z% r R0 D J+ c
- e.printStackTrace();! h6 w6 z9 I) t. {3 g
- } catch (SQLException e) {# ?( v% m6 E- l/ Z2 b
- System.out.println("数据库连接出现异常");
( }$ }: K+ m$ W! L, V - e.printStackTrace();# v7 i' J0 w3 h7 f: M* J( }
- }
7 d* v+ H0 q5 S3 w. h# z - return con;6 {& H: E' _' J: t- }& o8 T
- }+ x4 S* C U. x: _* |4 y4 O5 P
- /**! C- ^8 h/ M: S, c) F+ f
- * 关闭数据库* q+ L) H4 x: }/ r: S9 M$ C, j
- * @param con
( B1 e4 R* e: L; M# a% t; Q# O - * @param past3 u8 m7 C' J( {7 T
- * @param rs
3 E* `: v: f( A! L - */
" J7 Y5 r6 ]2 W/ b - public static void CloseAll(Connection con,PreparedStatement past,ResultSet rs){
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. e+ }: `: i" h( `. B3 c - if (rs!=null) {
: y0 n/ @5 K& h5 I! e - try {
) L! I* T8 {8 I) q! P - rs.close();
! K% j2 X& Z4 N* K/ A n* f3 v - } catch (SQLException e) {$ O" t2 w& a- D2 F3 n$ N' a
- System.out.println("rs 关闭出现异常");
6 U3 J7 e/ v" t `4 L - e.printStackTrace();+ P6 q; m. f9 e) b4 Q! ]
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- }/ ]; t$ p. _, Z2 D! ]
- if (past!=null) {* x* z0 g/ G2 o/ s0 H
- try {
* z2 r3 g& N, j0 V4 H- b0 [ - past.close();* N3 u& j; _; K# Q
- } catch (SQLException e) {
: [0 F7 q) C) f/ \& a - System.out.println("past 关闭出现异常");
; U, Y( A6 G q* r. ` - e.printStackTrace();
, V' y& c, t( ~5 }2 Y9 S$ S) g - }
, \( q: g- i& c# n3 j D) P - }
O, |0 r7 H* l- R# J8 C0 N- q! M - if (con!=null) {: R* f7 L4 b3 e" d
- try {
7 ^8 M. M+ u9 X ^1 y6 J - con.close();
/ j6 ^2 i& f2 h( \" G( s3 X - } catch (SQLException e) {
( O0 ^. g9 U$ e [3 ]9 l9 N: E - System.out.println("con 关闭出现异常");% f6 U0 k: ?: W9 J( s- ]
- e.printStackTrace();
$ U1 [2 v9 \, a) e" ]* [- k; F! e3 ?2 \ - }, ~: h+ @! A3 I% r0 J
- }
# E6 x$ ]+ W; y - }
) Q( [# K2 m/ s1 |/ M! o - /**
) {' j' Y; L4 f$ c& x2 E* L - * 执行数据的增删改操作
/ w( L0 `, _, ^) @; ~0 A - * @param sql
4 {. @: P; D( a* n2 ^. q" A; z9 P0 i - * @param getValues
( `* ^0 o5 E0 e - * @return- }+ I. e5 H7 y& e4 J7 f+ D
- */ k" M7 U: y, J3 {
- public static int executeUpdate(String sql,String[]getValues){& j% U6 i% S( _6 q2 u3 `$ d9 N4 U$ I
- int t=0;4 e" h4 l/ K, r( h
- PreparedStatement past=null;
6 v& k5 X+ o. m/ e - Connection con=null;
! G5 |3 l+ A! m - try {+ F5 b2 k7 J" v
- con=getConnection();; J+ [7 B. {# L( M8 O0 P3 D
- past=con.prepareStatement(sql);+ ?" i4 b I2 o3 @' e
- if (getValues!=null) {7 u, l. S1 w% X7 K: I8 u0 ?
- for (int i = 0; i < getValues.length; i++) {; P: B! _ q( R9 F
- past.setString(i+1,getValues[i]);
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- }2 D& G9 a% W+ @7 u; o* N$ @( m
- t=past.executeUpdate();, g& Q1 d' C) w/ M5 |
- } catch (SQLException e) {
7 Q8 A2 A w/ G7 _/ I' o - System.out.println("执行数据库操作出现异常");
' a$ p3 x) E5 H% g: B7 b - e.printStackTrace();+ U: ` H$ \* T
-
# O1 {# ]8 X$ C0 U4 H J; x+ P$ F( U - }finally{
, q* a! ?: k" W- n& x - MessageBase.CloseAll(con, past, null);9 ^0 y/ ?4 A1 Q* N* b' w
- }
- G( @* P p/ s2 W8 I8 ` - return t;7 S; f$ g) F3 w5 m
- }
3 h, X; f0 x" \5 f, S* E; _ - /**" g4 a0 L/ I% S9 m _
- * 测试连接& L( A1 I3 c* c! g H& ^
- * @param args( c0 Z4 N- v" N, g
- */
, f, o- J. ?- o# K' v" ?" W7 p - public static void main(String[] args) {
0 ~7 W+ K. E. v' B5 t - Connection conn=getConnection();
+ R Q! y Y9 _+ g- j - if(conn!=null){" Z1 m q+ o( [: _1 |; W
- System.out.println("连接成功");
* Y g' h5 d1 O) H4 i: A7 ? - }else{1 T- \4 B2 S" Y- |5 e- ]5 D% Q# Y' f
- System.out.println("连接失败");6 h6 @3 Y. [3 G2 Z& x: @
- }, |7 k0 @5 m( Q3 C! @
- }
+ b; ^: t+ E, ] - }; x$ w$ C" z- W+ z8 V! @
复制代码- package s2.jsp.zhangixao.dao;
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/ I$ L( I) }7 Y, O Q- import java.util.List;) E% t/ B+ ]1 \: }, D0 a9 k
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- import s2.jsp.zhangxiao.entity.Message;( p# x; Z, Q2 b$ o6 I
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- /**
9 t+ y" t3 v3 [- D' Y - * 留言板接口
7 `# q [' N$ c! E% x9 r - * @author Administrator
: [6 S2 j# j0 u% N. W% a% p( Z - *
' ]8 n2 H$ J# U/ z2 W - */
6 p5 U2 ?1 z; Z m, R7 [/ W4 [( g4 _ - public interface MessageDao {" m D' Y. X }4 [* R I
- //添加留言 T' F& [ a: J8 U& i
- public int addMessage(Message message);: [% [" m' q7 H: K3 ]7 d5 N* ?
- //查询全部留言- @4 n- Q* f1 \6 z
- public List selcetMessage();% B1 }' V8 H; A# ]4 G+ z
- }, |9 ?0 a% C9 Y, q4 v7 O
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