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- package s2.jsp.zhangixao.dao;
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9 G6 z# ]' b7 C9 `- import java.sql.Connection;
# [# @/ p: K- L! o' V$ U - import java.sql.DriverManager;
/ V9 P( K4 Y- y2 S1 \ - import java.sql.PreparedStatement;+ B6 E1 {) J4 J6 _/ N
- import java.sql.ResultSet;" ~; `% W& z3 _/ ]
- import java.sql.SQLException;
" ~# A! o8 I1 S3 h2 A - /**
+ K% F2 y3 j8 f) Z8 { - * 访问数据库% L' W+ P& S6 R8 L
- * @author Administrator2 @& j; C& }2 x# @, [; m1 w
- *4 I3 a h% z0 R! _
- */
) @! V% x0 @% y) [- s2 B: X2 _ - public class MessageBase {3 g: G& f, e7 N# Q, ?8 o n
- private static final String DRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";; `% y' Q% f5 j
- private static final String URL="jdbc:sqlserver://localhost:1433;DataBaseName=messageboard";% _7 e+ ~5 \( @
- private static final String DBNAME="sa";, N+ _5 Z: k8 p
- private static final String DBPASS="";
, @; v0 s/ M0 X - /**
7 Y2 k0 r+ y& |8 f+ x u& U - * 连接数据库' G! v& U+ _, k' [% ~/ y
- * @return) z3 H' {2 a( K1 W, p0 a v2 L
- */
; K8 O& A; N; v - public static Connection getConnection(){1 I1 Y( U$ y, j+ M2 ~% C- Z( r
- Connection con=null;
4 |! p3 F6 p# J; z+ B8 o4 p - try {( @5 p5 C6 @, Y4 n# S4 H
- Class.forName(DRIVER);, j% M) I4 H9 | ]) R: k
- con=DriverManager.getConnection(URL,DBNAME,DBPASS);) c- s8 s' {/ v7 X8 h
- } catch (ClassNotFoundException e) {
9 s# `" N' I4 }% u# n* V9 r( t - System.out.println("加载驱动出现异常");3 d. v- f, U/ d# m
- e.printStackTrace();
& _, g, [1 Q( g* F) W }, h - } catch (SQLException e) {' F8 l3 r' k1 y9 R1 \
- System.out.println("数据库连接出现异常");
7 S0 @7 H& F" A P. F: { - e.printStackTrace();1 M$ v1 u6 s* R! ` C$ N9 o5 h+ m
- }9 k: S, a8 v. s8 f O
- return con;. P: e9 u0 q7 H! c
- }. R) D( ^, I$ F( M; k2 Q* G" X! r
- /**! `- B9 z0 R; F
- * 关闭数据库9 V' h$ h" X2 T
- * @param con
6 \& _5 S! ?5 g4 M S- ?$ V - * @param past
$ d8 q! D$ ?. R) W! k; s- t - * @param rs: i$ ]+ L3 |" N
- */
) x6 E: _6 `/ M1 _/ S) c: Y5 [# r2 ` - public static void CloseAll(Connection con,PreparedStatement past,ResultSet rs){
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- if (rs!=null) {
( n+ s9 a" S7 P- X+ Z$ p1 w - try {. t% b8 ^+ Z( [$ L1 ]
- rs.close();
0 t( o2 m9 I' P3 i# T& {$ b; N) ] - } catch (SQLException e) {
2 b% U1 D7 T5 {; e) e1 ` - System.out.println("rs 关闭出现异常");
- |( Q, W) o) q( `5 D - e.printStackTrace();; Z4 e c: Q7 `
- }; M6 V1 B2 O8 X
- }
2 a. }6 x+ p3 ?/ w" i: b- D - if (past!=null) {# C K: h+ z( h @! r
- try {
9 V0 E7 q- d @& X5 M# a - past.close();
+ P* }4 ~+ e- A P: o - } catch (SQLException e) {* ^* X! l8 h, t, ~
- System.out.println("past 关闭出现异常");- H" c+ c- j( |! U
- e.printStackTrace();
: j$ @" {. q& o - }
) z. r- J& e3 P p) \ - }
6 Q: e/ B( V( C/ v6 i1 t - if (con!=null) {, D K$ b/ p7 S" A. d N
- try {% }. L1 j0 W3 R2 E8 f
- con.close();# I- r8 z( l6 F- f. f+ J% F* D$ g
- } catch (SQLException e) {
3 J0 x% L* X1 F. X$ G! Q5 |* t - System.out.println("con 关闭出现异常");+ ~% |4 M+ u& W4 ?7 D& S
- e.printStackTrace();1 c& w& b- ?/ n& k
- }1 b7 P! n6 e" o) A
- }
3 g4 Y2 b+ s, V - }
; y' p. v% w5 w2 g2 | - /**
- k( C' b9 ~; O. M9 T5 \9 J - * 执行数据的增删改操作/ \6 f& J2 `& Z$ G3 F
- * @param sql f& N7 b+ k9 c* Z; q
- * @param getValues, c H6 x7 ?; Q5 @. i3 b) x6 S
- * @return( Y1 l6 l0 W6 T# A5 O$ k4 J
- */, ` Z/ H$ z& G \1 r
- public static int executeUpdate(String sql,String[]getValues){4 ^- U" O8 o0 r0 l5 P1 N* F* e, |0 z7 A2 x
- int t=0;
7 l- @7 d( N6 Z& Y @+ o5 M - PreparedStatement past=null;
1 d6 U: ]+ P2 {" A - Connection con=null;5 l4 @! A1 U9 K2 J8 ?
- try {
. H3 F: @' v" E7 F - con=getConnection();
' h5 J( o- v! S% J1 z$ j& v5 Z9 R - past=con.prepareStatement(sql);
( Y* \& {' c% ] l% ?5 ^6 R5 a9 p - if (getValues!=null) {
+ k3 d6 j! U* h - for (int i = 0; i < getValues.length; i++) {
9 Z2 `+ F( {& f - past.setString(i+1,getValues[i]);
3 W& B/ k2 J {. { - }: h1 s9 f: [# H- x2 N
- }
0 c. o' }4 T6 Z. r# j - t=past.executeUpdate();
% I+ t6 f' @0 K5 G, D; p7 b+ Z - } catch (SQLException e) {
9 a4 \/ W! n# D! s% ? - System.out.println("执行数据库操作出现异常");0 {& A L0 I6 q: [: E1 _9 a
- e.printStackTrace();0 ~( ?; E& ^0 p' k' X( V1 I# h5 G
- 1 C% P. }; L8 s$ M }
- }finally{
- M2 r* R! ` s - MessageBase.CloseAll(con, past, null);
Y4 P$ S* u3 e5 o6 I/ x - }8 y; u! h# Y. r9 B9 X, }& C- w' Y C
- return t;' _4 h+ R2 M9 k$ ?# A
- }+ @1 Y: I6 ?0 A1 \+ o
- /**
4 {: |0 _. D( O+ l! H8 T - * 测试连接
9 a; V* {. I# ^ R B - * @param args
' v$ e. Y( {5 y+ m - */1 y0 V' d- U1 f8 N) q+ r
- public static void main(String[] args) {/ T6 g- a4 J7 {$ w8 y" B v
- Connection conn=getConnection();% K( q. `5 A% v$ \! Q
- if(conn!=null){2 L( O) H6 D& j8 q& w
- System.out.println("连接成功");
f; ^/ N4 ~3 G3 } - }else{
0 _+ v% }& D* h+ R1 N - System.out.println("连接失败");
# |, L6 i4 g) N& W4 J" x: }# Q - }
' d% T& o) A; L) ]2 a - }8 Q2 L! V$ o( S3 i& k5 l# [
- }9 x/ y, a0 _3 P
复制代码- package s2.jsp.zhangixao.dao;# W) U) z* J; ^: u
. F4 M& `6 c4 q- import java.util.List;6 S: k4 T2 b3 t' U, m
- 6 o* i; T4 C. t# i, e
- import s2.jsp.zhangxiao.entity.Message;
' G, z2 o3 C) }; s8 |, Z - ; c/ e2 x% ~; a- s5 }
- /**
7 ] [ C9 _4 {% K- G - * 留言板接口
3 C7 R/ z3 z6 r; J) N/ m - * @author Administrator; H7 M8 O: q' O E5 m" v6 @, ]
- *$ Q; m( L) G8 ~3 F
- */
. J a7 e. Z6 g/ d& J - public interface MessageDao {" j, R6 e0 G6 P& D' z
- //添加留言& Z* D/ {8 u P1 i6 N1 a& i
- public int addMessage(Message message);, i( @# i, l* O* O5 a& q4 b0 P+ i
- //查询全部留言
8 S3 \/ o. X. ?4 t - public List selcetMessage();
& E: P- ?9 s8 S5 s1 } - }
& X9 }/ h( w( E& ?8 h( _
复制代码 项目源码下载地址:
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