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- package s2.jsp.zhangixao.dao;
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- import java.sql.Connection;
- b% h/ t1 T' a! V1 l - import java.sql.DriverManager;
5 K# G# q/ C. e' ^, \ - import java.sql.PreparedStatement;
* R' \! i/ O6 ~8 @: B - import java.sql.ResultSet;5 J; x& ^# C- ]1 C& Y: O
- import java.sql.SQLException;
. S* f3 q$ S0 ?3 l - /*** l9 c- Y2 r# S: {8 @' T
- * 访问数据库
1 y; A5 P* o- A' C - * @author Administrator6 p0 m* M2 O2 U4 o7 s& j+ g n% g
- *
7 j& {3 c L. l2 e7 \2 P6 j1 x - */
0 h5 S* N! X: b% Z2 u+ y - public class MessageBase {
7 f7 B. k7 V/ _" Q/ O* T, n8 W - private static final String DRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";
# N) @ w, @7 q0 x9 @1 s - private static final String URL="jdbc:sqlserver://localhost:1433;DataBaseName=messageboard";
6 r" i* N5 W" a# b/ o - private static final String DBNAME="sa";' t/ D% }2 m' \$ S" I
- private static final String DBPASS="";; ]1 N- B2 {& q+ @
- /**
) g6 K8 A2 x% D/ g: d- _7 y - * 连接数据库
9 w3 ^1 n; j, O) A6 ` - * @return( p5 j& D2 L7 e H: s
- *// r$ m+ T- } U8 o+ e
- public static Connection getConnection(){# s$ V/ E; H5 d% |6 y4 w
- Connection con=null;$ O8 U& ]$ K- H3 m4 |/ @4 O. S
- try {: S Q8 Q, u- T! ?9 \
- Class.forName(DRIVER);: z: \, Q4 V0 B. W- O s3 w
- con=DriverManager.getConnection(URL,DBNAME,DBPASS);
( V7 `7 X: L# B. ]( ] - } catch (ClassNotFoundException e) {0 ]6 z7 k! H: W; P5 L# ^. y
- System.out.println("加载驱动出现异常");6 T- A# |! S# `( i$ l) i$ Y0 V3 p
- e.printStackTrace();
1 o8 h* W3 s8 a" ^ - } catch (SQLException e) {$ T5 F3 ~8 q& e. Q9 H7 F$ H0 [
- System.out.println("数据库连接出现异常");6 S5 K, |7 a% P
- e.printStackTrace();- r$ D( }4 T; ]
- }' j& [2 c1 C5 \. ^8 e) `' `" H7 T
- return con;
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- /**
. {4 S0 O% j1 r( s/ U* T) w- f - * 关闭数据库& Q. C+ o8 s& @& O0 z9 a, ] k: E
- * @param con" ^% |7 o9 S8 b; R1 K+ y
- * @param past+ C# k; }9 i* X/ g
- * @param rs
7 p; t2 a! p5 U* Q/ v - */
/ t4 k! H% A2 w - public static void CloseAll(Connection con,PreparedStatement past,ResultSet rs){
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7 z/ m0 `' m# r' W) ^9 ?0 S - if (rs!=null) {
8 ^+ B4 B5 z2 S" n' ^' t7 @ - try {
. ^0 I0 R: Q' _: o - rs.close();
( n) E) W$ }+ H% z8 E5 J7 a' i - } catch (SQLException e) {( G) r+ g, t9 m
- System.out.println("rs 关闭出现异常");8 S0 D, [6 X7 D1 P- g+ {" U
- e.printStackTrace();" v. K; y4 ~0 j5 N; m" l- y2 e
- }
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- if (past!=null) {
& H% S! ~# P" y - try {
( \& d+ z8 E- D; @ - past.close();
- G* c% _- T9 v& e9 T - } catch (SQLException e) {
2 k' K) J1 L9 Z s& }9 n, w - System.out.println("past 关闭出现异常");
% b$ Z1 N( C) E6 ^8 g - e.printStackTrace();
( g `3 _9 C8 Y t$ r' O - }
4 Q6 X' b, G7 w - }
4 Q& a5 O$ v3 \4 g3 F; _ - if (con!=null) {
& s! p; Z! g* Y8 \ - try {
% { N T1 M$ _- ~ - con.close();
1 u9 p1 S# x$ N - } catch (SQLException e) {
) W; W) @- v/ V - System.out.println("con 关闭出现异常");! W) q7 h; w4 p( R7 }
- e.printStackTrace();$ n8 w$ y! J0 m) K" ]
- }+ R* y% e. o% E
- }, X0 p! @$ h* Z. A4 J/ z
- }! {: g) F; s, L6 h
- /**1 l6 A% O( p% ]6 t
- * 执行数据的增删改操作
5 w9 F, e5 W& f9 V* J2 n" T - * @param sql3 K5 ^- s/ I3 ]6 P: G' Y% E
- * @param getValues0 {+ T& b7 f' R9 I, R* t/ E
- * @return5 B( ~; T5 \7 [+ o& b) A, j, f5 J
- */
! _( F+ V9 M: |0 z - public static int executeUpdate(String sql,String[]getValues){: a* n: a7 M1 W& e: p# p7 `
- int t=0;
- }9 J& t/ C# n4 s# Y7 h, v# H$ e9 U - PreparedStatement past=null;( o/ A- y- \/ R& p9 Z
- Connection con=null;
; k0 X% _. M6 W: H! Y$ y( y - try {
; w( W: _' W- u# L! Y - con=getConnection();
8 R; R6 X, T0 g. |' F - past=con.prepareStatement(sql);
1 {9 J& n. D$ y( @2 W0 }3 W) c2 l - if (getValues!=null) {
$ t$ n9 G& Y+ z# F1 ^# x2 z - for (int i = 0; i < getValues.length; i++) {
7 l( {. h1 ~' o8 b - past.setString(i+1,getValues[i]);9 j; G# G5 t+ y
- }
+ d8 Y! ?& \9 T0 `* a - }
! W9 H' k& X+ { - t=past.executeUpdate();
3 o. c$ G" r8 l4 u' F! e - } catch (SQLException e) {
: q1 R9 e3 ?. }/ M. ]) @ - System.out.println("执行数据库操作出现异常");& D+ a3 J' f' c3 H9 d, x
- e.printStackTrace();& _( H: F( v3 |4 k0 D W
- 0 V5 M& D1 q8 ]7 H7 y2 Q! I
- }finally{% t& |) d* _! R; K
- MessageBase.CloseAll(con, past, null);# |+ b! p5 m( S6 p( c: C- P
- }
! Q; P' h- I% M* p. h - return t;/ v: ^, \2 G! @$ @( Z9 J
- }
; [* x- D! U4 u5 J: o" j - /**
& }" y' Q9 S- E1 o& d' L P. U8 y - * 测试连接7 U1 X3 t4 j5 s1 C, R
- * @param args
4 }; |5 j% J1 g) ] - */
& N3 g9 n: p4 q" S7 _ - public static void main(String[] args) {
) s# o" x e) U O- F - Connection conn=getConnection();: X6 }* ~$ N! B4 Z
- if(conn!=null){
# l: ?9 ^4 Q9 m* a - System.out.println("连接成功");
! e/ Y0 E" _( _* o+ D - }else{8 l6 A( }' e' g: q% h
- System.out.println("连接失败");
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- }. o& b& S8 T: m' ?$ P1 _
- }
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复制代码- package s2.jsp.zhangixao.dao;
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- import java.util.List;
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- import s2.jsp.zhangxiao.entity.Message;
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- f# y2 g8 i. [" j- /**
. I1 y; ^$ C- F3 T% Z - * 留言板接口
6 E$ p7 f& q8 y! ^# s7 k2 n - * @author Administrator; I' _* k: D" Q8 C% x
- *
; G5 |9 q8 t. t3 l2 V) T) y6 _, H - */6 ]* V. c) b0 F) @
- public interface MessageDao {& Q- X* F, I9 E3 s0 ?
- //添加留言9 R- y* E; U' q
- public int addMessage(Message message);, t& i4 W) d, |2 e8 k- l4 P8 l; L8 L% i
- //查询全部留言# U! j/ _" {8 X5 ^" J# E' K9 ?
- public List selcetMessage();
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复制代码 项目源码下载地址: ! u/ d! H* [+ X% w$ t
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