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- package s2.jsp.zhangixao.dao;
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- import java.sql.Connection;
" v8 P0 a. [% P5 u* N6 _ - import java.sql.DriverManager;
. _8 _. b; l2 }* r, U - import java.sql.PreparedStatement;
5 R) W( L% L3 g9 @! R/ R& O - import java.sql.ResultSet;. q, k- n ]0 g5 ^: F
- import java.sql.SQLException;
9 b" M3 d; `4 A! ^ B2 l - /**0 L) d/ t5 E8 h; I# ~) Y" U
- * 访问数据库
6 v* m* }1 @5 S) H' { - * @author Administrator
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4 B# X# i) D& A. u) A - */) a; \$ S% s- L& G
- public class MessageBase {3 w4 I& k+ H! v
- private static final String DRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";
* `* T9 G& ?! D- g5 `: c - private static final String URL="jdbc:sqlserver://localhost:1433;DataBaseName=messageboard";
7 Q' g/ @, S; e! |. t3 G6 g' J( M - private static final String DBNAME="sa";
1 |+ V# W! e/ W; U6 ^1 s - private static final String DBPASS="";
1 s& r! t* `, E( Q - /**
: ~+ a6 _$ n* Y- h - * 连接数据库
/ T! B5 P, D U7 v$ `4 Y0 U - * @return! F" Y h6 t- A3 w- i
- */
l; E- W2 f- C+ x/ T - public static Connection getConnection(){
7 G% d" S; x" H. w( m( Q+ } - Connection con=null;6 V* q9 N# I$ R, ~# m# q" ^
- try {9 D5 m; x+ D) _: c) n
- Class.forName(DRIVER);' b' r% U% w" z1 f" l: G
- con=DriverManager.getConnection(URL,DBNAME,DBPASS);
0 g' X O# }% H; @- N - } catch (ClassNotFoundException e) {
T5 U8 [8 G$ ], Z1 P9 i4 | - System.out.println("加载驱动出现异常");: v# \* m, C) H ^# h$ Q k
- e.printStackTrace();
+ q' f* f. l+ R2 F - } catch (SQLException e) {
& J, I3 {+ S/ j0 k3 C3 S3 u - System.out.println("数据库连接出现异常");3 {+ W/ `1 L2 c" _4 S: p
- e.printStackTrace();
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- return con;
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- /**
3 a* y4 o2 e- ~6 ]6 H! c/ A - * 关闭数据库0 v& `5 A1 Q: a) n4 n1 u' e9 ?
- * @param con
2 r- A7 O% ]3 B7 I6 V ^ - * @param past$ q; G0 ^- E6 c: ~) O
- * @param rs, _$ x& v; l! N
- */
/ m; J S, [. A3 ? - public static void CloseAll(Connection con,PreparedStatement past,ResultSet rs){
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$ p7 J) h) A, z4 p9 U - if (rs!=null) {
! K; E3 ^& [7 |# _3 o2 ^! o) Q - try {
- A& e u, e5 `+ e - rs.close();
' e; q6 Y& Z$ W( o( c- x" f - } catch (SQLException e) {. l5 }7 a8 l$ @ a( O
- System.out.println("rs 关闭出现异常");
6 r3 R6 m* d+ T( k - e.printStackTrace();8 B8 d2 S- G6 {5 j4 y
- }
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- if (past!=null) {5 a6 Z0 @( n( W' D
- try {+ d6 l3 j$ h( r* |, T
- past.close();
! O( h! K* y/ t - } catch (SQLException e) {; V, o; v7 Z7 k4 `! }. W
- System.out.println("past 关闭出现异常");
% R) U# k4 N8 {1 K - e.printStackTrace();
0 D0 i: y3 z6 v% _ - }
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- if (con!=null) {
- f! g1 ?* e8 p8 i! ] - try {- A5 v T! r3 @( A/ ]* E: d+ q7 B
- con.close();' O8 C# K6 w8 y2 M5 K3 b" L( d
- } catch (SQLException e) {" m- @/ N+ n) z
- System.out.println("con 关闭出现异常");% @+ y0 R1 ^- T9 L" q
- e.printStackTrace();
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- }' a7 S/ m/ l2 G/ V( ?
- }
" j# K- j7 n/ w$ r7 ^- K D& ^( `% U$ ? - /**
6 z) j# q& g9 N- \ - * 执行数据的增删改操作1 o% o0 j/ l+ ~. A8 Y0 E* \6 n
- * @param sql
" o/ M- H1 ]4 F: C5 M - * @param getValues
% U( V+ x0 G1 T/ u7 X. n: } - * @return
2 \" R \* E7 I7 S. i - *// \! L h. A$ U) H% V- l
- public static int executeUpdate(String sql,String[]getValues){
/ V+ Q9 u7 k k( S8 }& m- } - int t=0;
' R! b! C1 [+ }8 E - PreparedStatement past=null;( {) m, F; g7 X# K, b! h
- Connection con=null;
4 Y% {3 W- h3 W1 Y& P: } - try {+ Q- ~( c* I# o# F
- con=getConnection();& ]0 L1 @% j) h* s% X% j% P: W9 Z
- past=con.prepareStatement(sql);7 `& X8 W) g* N3 O5 n
- if (getValues!=null) {
$ \2 B4 h) A3 `3 ] - for (int i = 0; i < getValues.length; i++) {" e+ z- w0 {8 S: e2 j
- past.setString(i+1,getValues[i]);* ^* z/ I6 {+ F3 c# G
- }
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- t=past.executeUpdate();
) h& S7 j% @4 R - } catch (SQLException e) {
. a8 T8 O, f: D - System.out.println("执行数据库操作出现异常");
+ B5 O/ O7 c7 C' A/ H - e.printStackTrace();- W2 n1 x; `1 I% P w
- 9 `7 _* E x! _# [8 D- ]( S: y
- }finally{
* v7 M! e, }7 s q. t1 A, p - MessageBase.CloseAll(con, past, null);( y: U- V# a0 X# Y
- }
, O/ T, b2 m$ h& j8 I8 A - return t;/ P0 }$ V5 L) N0 _/ n
- }" D) n% j4 \. m
- /**6 ~7 G3 l, T8 i$ F$ L" T0 U
- * 测试连接
+ s) J3 l# s8 `4 w `- h* }1 ] - * @param args# z6 Q' j) z) S0 A$ Y, G; f
- */# R/ y" N' p5 M
- public static void main(String[] args) {
! K& |0 K& H- F. ~% J+ m- D - Connection conn=getConnection();" j4 A3 A1 h9 f6 `$ o( C2 c
- if(conn!=null){
9 t) f& V6 ~7 I b9 ^# y - System.out.println("连接成功");
# O! p# N8 |$ A: C - }else{1 C- w. d9 L% W$ y6 u2 b
- System.out.println("连接失败");
+ W8 q+ l+ N9 C& J& ~" z - }
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- }; J1 `- R# g9 G
复制代码- package s2.jsp.zhangixao.dao;- c1 |7 w6 H j0 M; m& c( N
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- import java.util.List;
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- import s2.jsp.zhangxiao.entity.Message;
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. W8 s& m" v2 C7 D& }: F5 w. ~* y2 P- /**
6 M) a& ^4 z& E" l - * 留言板接口% U" Y. v7 |; q: ]% d
- * @author Administrator
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- */
$ [( F/ R( Q& Y, J7 X - public interface MessageDao {- S: l" s) @7 c! g. j! G
- //添加留言. @: Q) O) D" @ a
- public int addMessage(Message message);
1 \/ |) k) ?) G - //查询全部留言
; O1 y! m# I8 A& U' ^" u - public List selcetMessage();
5 t% h' ?$ X: T7 [/ | - }
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复制代码 项目源码下载地址: 3 C3 A- y& ~) _
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