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- package s2.jsp.zhangixao.dao;7 I, M+ ]' z$ I" B9 J' z8 M9 Z
9 D. t$ P; z9 B- import java.sql.Connection;
8 z& _# J7 T) d) t- \ - import java.sql.DriverManager;: T( d3 |- {# u- K
- import java.sql.PreparedStatement;
; z5 N9 ^! N; i. C - import java.sql.ResultSet;
8 L5 ]$ c: j5 ~7 ?. S - import java.sql.SQLException;) K& k, c( }% Q
- /**1 k6 `- B" @, |0 Q7 _) W b
- * 访问数据库
4 k' j" f* w$ p - * @author Administrator+ S+ c- @5 ~% d& M' D% T
- *# o7 X- L t, o# N0 T, F8 j
- */
# x1 L7 }( m5 v6 c8 t- H - public class MessageBase {* I7 R8 X: I, U: p% v5 z
- private static final String DRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";
" p, r# `4 X3 G) |6 r6 B7 @3 ? - private static final String URL="jdbc:sqlserver://localhost:1433;DataBaseName=messageboard";
8 K3 `/ k7 g5 S2 l( u - private static final String DBNAME="sa";& j3 z1 i* R7 A s% y( r
- private static final String DBPASS="";
7 C2 ?( g( l3 \8 o9 M [ - /**
% `" d/ a1 i: @( C5 [. I - * 连接数据库: C+ q) T; ]! Q
- * @return
8 U, A- Q9 n, G# G/ o - */) N4 X+ T9 T# j! E& ^# M
- public static Connection getConnection(){
2 X7 A" H* ~. ? - Connection con=null;
3 u$ o Y$ N! U+ s - try {
! x' z1 b) m9 _: {' F - Class.forName(DRIVER);9 G/ }3 S" n/ E( r% s& r0 L
- con=DriverManager.getConnection(URL,DBNAME,DBPASS);) s: M/ |# V0 ?3 u
- } catch (ClassNotFoundException e) {! U( A% v* F r& C0 q
- System.out.println("加载驱动出现异常");
) s& w( s' y$ J! [6 p( F - e.printStackTrace();5 ?6 [$ A8 k# @* M9 C O; t
- } catch (SQLException e) {: c: `: n/ J) _6 m2 d( B V7 R' @% B& }0 Q
- System.out.println("数据库连接出现异常");9 d/ o2 X' I4 `3 e2 }
- e.printStackTrace();- X+ c5 n8 H9 u' h! i# E2 b) I
- }4 q( D1 T! Q1 s8 ?% ^/ J4 ^
- return con;
& |( ?3 z) z7 Z! P1 ?5 v/ J) L - }
( I2 G7 c! D; s" B% t$ i* v - /**3 @3 L1 d% \9 l3 F5 ?
- * 关闭数据库
& ~! n- m$ V: F; _* D - * @param con
0 p5 U! E# B7 {& `3 x: q% a2 i - * @param past
9 j: a' T# w4 \+ M* }) y - * @param rs
/ ?/ F5 `3 c! t/ D - */
. G: f. K6 k/ c, H" c: g - public static void CloseAll(Connection con,PreparedStatement past,ResultSet rs){
. ~$ W/ P+ }& t- C/ a: x -
; M6 }) u! R) O% c3 Q3 [ - if (rs!=null) {
8 P6 H0 ?3 q- A& P3 _ x - try {
8 A$ m& Y, u4 { - rs.close();
, N- _6 O# q. @; s! y. E# V - } catch (SQLException e) {2 ^5 J( b' O6 Z$ w# H+ M9 j
- System.out.println("rs 关闭出现异常");
S, r. p* l2 o - e.printStackTrace();8 Q* z( j% D4 m8 b: U* F
- }0 a6 W ] b) }) W0 p, ^( L
- }
! D/ E% [. S7 j8 o1 r# A - if (past!=null) {- N1 Z/ P M+ U) F
- try {
* m2 ?; _8 ~! u3 L: n3 Z4 W4 d% b. ] - past.close();
; s' |" H) K1 H: l! g - } catch (SQLException e) {
7 Z# r/ B2 S' W" S) f - System.out.println("past 关闭出现异常");5 t) F4 z: z0 L3 E
- e.printStackTrace();- d. I$ F- i b% f& N8 Y4 t
- }# C! o7 c8 f6 u3 T9 c2 S
- }
# K8 }) C- _, W+ C" ]0 X - if (con!=null) {5 Q6 m# k, \% {* w
- try {, T7 \5 }+ E- D6 K. `
- con.close();. y( c+ L# ~ Z% a
- } catch (SQLException e) {# L7 X+ Z; Y, y% y* q6 y0 u
- System.out.println("con 关闭出现异常");
% w5 F4 N* I ~- D, Z0 A - e.printStackTrace();
9 j8 F+ B7 v1 F# h/ m1 e1 I: E& G - }
c8 m0 N5 l/ I! T) P% H" c Z - }7 k5 x7 I& n8 f \$ O1 ~5 m
- }! R c/ T+ i# i
- /**, n7 j+ \6 G/ |. i
- * 执行数据的增删改操作, K* S5 r. P7 v
- * @param sql
3 T6 O" q' A& K# w6 {0 C - * @param getValues0 P2 _, Y4 ?, ^, y. m; Z6 l
- * @return
5 U' l3 c6 i. h7 }# p - */* C* B, M6 f; y3 T6 d& n9 ?- T0 o
- public static int executeUpdate(String sql,String[]getValues){( V( `& ?; [/ ~$ R
- int t=0;
2 t0 u8 O! V5 Y3 Q7 @. x+ h" n, H' L - PreparedStatement past=null;6 C9 [; H0 J; E! M* t
- Connection con=null;* r0 t. r/ s, J/ q# C
- try {
9 F) U0 c& M9 m - con=getConnection();4 c& F$ u; w/ S, D3 o3 B5 @
- past=con.prepareStatement(sql);
* m1 K, B5 V# j/ G- u - if (getValues!=null) {
( t5 k. R! v% L8 K - for (int i = 0; i < getValues.length; i++) {
( X4 q8 e! n* J. [& |' U$ _ - past.setString(i+1,getValues[i]);8 R4 p; z! T+ C M( x8 V% t' j
- }4 h {; D2 b3 [; k
- }: M y Q; E8 c3 w+ s
- t=past.executeUpdate();
6 o$ k* g$ D9 }0 q" q( ?# R - } catch (SQLException e) {$ d. }3 z: H0 W9 T' N! ^9 n
- System.out.println("执行数据库操作出现异常");! m; H0 x$ A: N# X4 q3 N
- e.printStackTrace();" G! M2 g; a0 o$ y3 f; e0 Y/ w
- 2 Y; x% x9 y8 c# u
- }finally{# H# H, g$ I0 K: i
- MessageBase.CloseAll(con, past, null);* M% }! R! `: Y! _
- }) u |7 \1 I/ ]/ k4 U
- return t;
7 s: u. M+ G+ D z& S - }9 H r+ z- j) Y7 m) X0 y
- /**" M; U# j# p! y4 c
- * 测试连接* ~ p2 Q$ u/ B
- * @param args
, f7 d7 M1 ?! ]- K: Y" v - */
; }/ i4 i% M2 P/ I% D4 S* L - public static void main(String[] args) {% p6 B- ]! o; n* c' Q- R- S
- Connection conn=getConnection();
/ M" l. _% Q: Y7 b% {% P - if(conn!=null){4 J6 J* u) |8 |8 G+ u2 s. L
- System.out.println("连接成功");8 p& j1 M" e* p& P( o. a% k
- }else{* N5 e4 ]& o& F1 ~1 X3 C
- System.out.println("连接失败");9 X1 s: K0 L' Z, D* L2 T, G5 x
- }( b, m; A9 B. P, p9 u
- }) b7 Q) [/ J3 D) ^* B# i
- }
; T" q# o4 W: B0 Y
复制代码- package s2.jsp.zhangixao.dao;4 J8 N* f1 M" p: T/ t
- - n+ h0 }$ M. [, L0 Z1 R0 r5 j9 u
- import java.util.List;
! `3 f' t- Z& ^) }; G
6 h) s1 B1 W+ s& }% s- import s2.jsp.zhangxiao.entity.Message;# U- N. O4 b% G2 ?) T
! w7 H! _2 h/ R7 o- /**8 b l* I8 O' c8 p
- * 留言板接口
4 W" m, e- a1 ^ x4 G - * @author Administrator- h% t" z9 g3 x5 H4 W4 g' z
- *! \. F% ~; Y# x6 H" }/ K; |
- */
p2 D8 s/ A& ~$ d- S; G: {- v - public interface MessageDao {
# ^! s8 t* F0 I8 ~ - //添加留言
9 e- o9 d" f- c" E( Q' R - public int addMessage(Message message);. P" s* E5 X8 Y! E
- //查询全部留言! w3 E" f% {- C3 @5 g u# Z, _! c& q
- public List selcetMessage();7 d2 |# W% J$ w( l
- }
4 T: r! A" ?3 o8 U
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