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- package s2.jsp.zhangixao.dao;
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( |8 r _' P" I0 X4 h* l/ f- import java.sql.Connection;
$ c! k5 R+ e% `8 B2 n4 D - import java.sql.DriverManager;
) T) \+ n$ v$ c/ |! W' {8 A- o7 T - import java.sql.PreparedStatement;$ y9 V: n8 X3 Q& K& k; S
- import java.sql.ResultSet;
5 h# O. W7 O9 O% m2 c! c - import java.sql.SQLException;
' S. |: v* ^. z2 N8 Y3 l - /**
7 M% {& {, T, _ - * 访问数据库) A) i8 [( F5 q8 z1 G
- * @author Administrator
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- */0 O; P m5 L0 D, [5 G/ S( R7 B
- public class MessageBase {
+ z2 v" h! G6 L. o - private static final String DRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";
* n( C/ q7 @% ?; Y: B/ s' ^ - private static final String URL="jdbc:sqlserver://localhost:1433;DataBaseName=messageboard";
1 j" O1 s; Z9 f, i; \6 D0 G& ] - private static final String DBNAME="sa";+ |! M1 p! i3 k7 \
- private static final String DBPASS="";# f, z, |, l, w" g3 H/ i/ J3 H
- /**
6 ^5 \/ D9 E1 q! _ - * 连接数据库8 l: ]" { v! F
- * @return0 N5 R6 K/ n$ `8 u; y; y( W
- */
; m D( }3 I5 z0 M. c0 F* v5 S - public static Connection getConnection(){
% F& y9 ~' j: \0 t8 p, W - Connection con=null;
1 M# e) n6 }5 V% ^& T6 E5 y - try {4 k; W- V! ~1 H, W1 e3 L) W
- Class.forName(DRIVER);& E' A1 {# M/ @' T6 l+ q
- con=DriverManager.getConnection(URL,DBNAME,DBPASS);9 G; U+ Z- L3 b. S, z
- } catch (ClassNotFoundException e) {$ ?2 K% w4 L; W
- System.out.println("加载驱动出现异常");
6 P" j/ N' ?3 F, W. }1 { - e.printStackTrace();
7 E. z% x$ B4 l/ m% d1 ~ - } catch (SQLException e) {
! E, o0 t3 i$ f. L1 R - System.out.println("数据库连接出现异常"); a' h6 x% f( |1 z8 y- ?) Y( K% Y
- e.printStackTrace();7 D0 @8 k: ?- a0 Y" b3 [4 ]
- }
6 f9 u) J6 D7 w4 s0 P e1 x - return con;: G) A6 C W: H' @6 d& |
- }
2 K( _/ ^4 Q2 _$ d, @5 L9 Q) R. P N - /*** i; K' p4 t# P; L
- * 关闭数据库
* T$ ~ A) F& s- \ - * @param con
; `; j: C/ _5 Z% G+ w - * @param past# f0 P1 b! n2 V% Q1 x4 S% |
- * @param rs. V% p% P' _. G: p, ?+ U
- */ Y0 w# {, ?4 w( T. X
- public static void CloseAll(Connection con,PreparedStatement past,ResultSet rs){( a" }/ T$ C0 N1 K, T
- : P5 U: t' t/ g8 R8 y8 g
- if (rs!=null) {4 S1 a( n% P2 `3 @8 n
- try {
0 {# m6 T0 {6 C5 G( m6 H - rs.close();: O8 |, ?8 s0 w \- h5 t" W
- } catch (SQLException e) {; c t0 T3 d- j7 x3 m8 n
- System.out.println("rs 关闭出现异常");. V. M6 R5 s: x( M
- e.printStackTrace();" z: |4 C' F+ a# s7 W+ D
- }
3 R) K+ p. ^" I9 ] - }
( I Q1 B. k- h5 g# U( m4 P2 ]2 y - if (past!=null) {; ]2 f2 W: w% A7 c
- try {
/ F) |' k* |: z! r - past.close();
( l6 |" E# V& U$ _- G B - } catch (SQLException e) {( {4 X: {% f) i8 l3 S
- System.out.println("past 关闭出现异常");
' M! D9 }4 ~9 r! Z# Q0 ] - e.printStackTrace();# o( e9 {) x7 m$ g5 T
- }0 c4 M4 @9 r. [
- }# Y( B6 ^2 W, q; x, U
- if (con!=null) {
X/ o0 f* C% |9 Z0 L- p - try {+ O; h, b" G2 |0 W
- con.close();, I3 V" K4 o6 i
- } catch (SQLException e) {- T- o& ?3 y! _, }* N+ M
- System.out.println("con 关闭出现异常");* `: u. G/ c& k% X) k1 A
- e.printStackTrace();
+ }7 Z* R7 f7 C3 G - }
( p/ h2 Q$ I- v' U% k% S - }9 H- p7 Y0 _9 Y: \
- }
. H6 h) w5 a3 b$ h x - /**
% v7 q3 A3 |. d1 w) U. s0 a' J* \8 B) _ - * 执行数据的增删改操作" F& J: c1 m8 C; p) }2 l7 T" I# n
- * @param sql
( M! _( N# g0 ?# [ u d7 J2 L, d - * @param getValues# B: C! ]2 \8 ~2 z; ^+ G
- * @return1 k" U# c4 z8 X# H/ B
- */4 a0 w& w m. `8 x, o
- public static int executeUpdate(String sql,String[]getValues){2 v# r; Z7 B) d$ a0 V2 d# C! m0 y9 s
- int t=0;4 J7 G( h( l. g
- PreparedStatement past=null;
1 ]( p0 x# K2 t - Connection con=null;
+ D) S- j: K' u/ c3 P - try {
; j" O6 g* r2 j - con=getConnection();$ h: V/ m# k! u+ f
- past=con.prepareStatement(sql);
1 e- ~& @2 m0 w# K: E9 C3 F- X - if (getValues!=null) {9 J5 ^$ F m1 \1 j
- for (int i = 0; i < getValues.length; i++) {
5 s' g7 p9 K# Q# d+ Q$ q - past.setString(i+1,getValues[i]);
' `) i2 `# y( J# f% u' N - }- x- _4 |8 h( p% z( J# t1 y+ X
- }
+ C: C) A7 h, x/ b' N& j - t=past.executeUpdate();
; @: N$ w' `; L5 a( p$ A - } catch (SQLException e) {) r7 ?# h8 o) q i% t' h9 ~
- System.out.println("执行数据库操作出现异常");
* v0 R9 I x; {0 j* w) }! {1 R1 g - e.printStackTrace();( c: U3 j8 F7 A9 s; V
-
$ A# Z4 V; b3 X - }finally{+ M: b9 t* f( I+ w' c
- MessageBase.CloseAll(con, past, null);
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- return t;4 |, Q0 o0 l1 |1 [- t0 M; M9 l
- }
1 n: z* a( n' U3 ^! G - /** y+ F- ~8 ?" Q3 U9 M' ]
- * 测试连接
0 U+ l/ J5 c4 q' }2 R; I$ b. C A( F - * @param args
9 ~7 _% D' z% e h. l$ j2 z! P1 e - */& J2 G9 f+ Q% }4 D
- public static void main(String[] args) {
) z) ]! F% r( x) z - Connection conn=getConnection();
% O. G* R V/ g" O: K - if(conn!=null){
7 m6 ~' {% j2 P - System.out.println("连接成功");
$ R2 v( d% l% c - }else{% W. D9 i n/ j- v2 i. }( y$ a, q& `
- System.out.println("连接失败");. @$ ]' s" w5 i: _' e# ]2 @, |
- }, Q5 L7 {' R; e5 N) `' Z" q
- }; v8 Z) a' ]: q
- }; S B2 B6 f6 N, Q
复制代码- package s2.jsp.zhangixao.dao;3 K1 ]$ I& k; b$ g6 D3 t
- 9 j; z5 m/ M% ^3 I& Y& o8 I
- import java.util.List;% O8 X- f- S5 m: A8 i" \7 _
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- import s2.jsp.zhangxiao.entity.Message;8 C6 V" i" _; Y
# k1 Z/ y T5 u% Y- `$ ]- /**% _/ E8 c" \5 q( G k/ A' s
- * 留言板接口$ Y; q5 e) c0 }- O
- * @author Administrator
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- */
! Q2 k5 v+ D, W4 @: M - public interface MessageDao {8 T: E1 I$ M8 c8 l% A
- //添加留言
# q* w1 U! p0 c- L. ^: P- Q - public int addMessage(Message message);
7 D' B7 p# O& E1 V - //查询全部留言+ x5 r" x- z! e! c p3 \
- public List selcetMessage();
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复制代码 项目源码下载地址: 6 \7 ~3 S. I+ A3 P( e1 L
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