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package s2.jsp.zhangxiao.dao;5 f$ j8 A: X" x N# l
/**0 H3 S6 t; N! W! W
* 实体类
8 x4 E3 l$ |$ H' |, v% a) x * @author Administrator
3 l3 `* D/ c6 h; M *
) {3 v; z! K8 x4 W */
0 s: E* j" G* F7 u3 ~1 ^ public class News {7 r: @1 k9 l' _; `
// id, title, content, pubtime, author
3 p8 Z2 N5 n/ B7 C0 Y' }3 p private int id;2 \0 |# E# p" |& v# E' m4 X9 A
private String title;) I4 C" m( @( b) w5 d6 r& S5 R
private String content;
1 t2 q& r% v: r# S* a$ [" q private String pubtime;& H1 }- Y7 ^$ [8 `, d' V! }! R
private String author;
! e% s& I( F0 k8 R6 e /**
* @: A0 ]; Z7 R! [' W; G& W Q * 构造函数3 I1 P2 o2 E$ {$ H; e s1 Q) _
* @param author 作者" I2 S+ V9 f2 n! {. {' F
* @param content 内容
9 B0 W0 h" H3 q * @param id 序号
( S! p+ U& Z1 A9 f# r * @param pubtime 发布时间
" k3 R3 H0 i4 R+ t * @param title 标题
7 J" x6 e) b! t5 C8 ~2 g9 f8 ^ */' x: C* x. h+ ?$ N
public News( int id,String title,String content, String pubtime,String author) {0 _ {+ Q0 I$ L, d' X& A3 b5 m/ c
7 f9 l6 X2 v2 `7 M0 F
this.author = author;
* X/ z6 y- Z" ~* ?7 s this.content = content;
s+ {! G' w; w( r0 f0 l" Y, Z4 f: ` this.id = id;
7 H. B! M' J1 L this.pubtime = pubtime;
! P( n: w& k) d \( F1 s" i this.title = title;
* L. s# k+ V: I1 T }
0 S y0 M' X2 q2 i /**
. d# W/ @! ? u* c9 y1 A6 f1 H4 f- D * 无参构造函数/ L5 \7 u* |! [1 p9 h
*/
8 `% e( S8 c0 v public News() {/ h8 _+ G. _4 \( Z
super();
4 B, h# q6 X* r" w }* w2 Q' M& }1 h; h) o
/**
7 [. N$ v- z! R3 f0 O * get ,set
+ g j2 o$ p& S+ r * @return
1 r9 y7 r# _- f */
( r& U2 C; R( P- M2 v public int getId() {9 m2 q* v3 r& r+ a) {( c( J
return id;
* ^/ I" z* g; p+ N, ~ v6 n @ }8 \$ V) M+ m; Q/ g" P0 Q
public void setId(int id) {% r7 k, r! e4 P( ?
this.id = id;
# X1 k! R# s& z8 ?$ V3 q* ] }" b1 B& v: X- k1 {% s
public String getTitle() {
/ v0 V$ Q# l2 d* ~; p$ c. V return title;
5 z& p* b" _& N$ I; R }) p# E0 N6 ^7 r3 X P" w
public void setTitle(String title) {
7 o9 [+ R4 A ]) K- y$ @ this.title = title;- y2 C! v" s# M, A3 `
}
7 V* e P- Q4 h% P; | n public String getContent() {
( T2 z. q: {+ F8 ^9 K return content;
# q3 q/ a8 J1 _6 w+ F' O0 p }
/ b% Q1 G4 i1 W, a public void setContent(String content) {
9 C1 @+ c/ a4 |( t% r% T, @( G- z. G this.content = content;
1 _4 Z1 T, V% T9 d }
& F% B! q' S& @" f public String getPubtime() {7 T% t* ^. E1 z* }+ ^( {
return pubtime;
) g- X) C+ z5 {' K% \# K }
1 \) R8 Z+ o) Y8 B3 G public void setPubtime(String pubtime) {3 `+ V# K3 A) Q( L! V" u" ]
this.pubtime = pubtime;. D# V( L1 P. Y$ K7 }: }7 x8 ?
}
# T* X) h0 A8 I6 k public String getAuthor() {
- T/ h% t [1 L% H4 m6 R" J* H return author;
1 m, w c& W2 A I$ p: Y }2 z: S4 A* K$ K- f& j
public void setAuthor(String author) {- U3 o1 R, M. f
this.author = author;+ w7 U0 j2 g( B7 ]# m
}
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复制代码 package s2.jsp.zhangxiao.entity;
/ o0 C$ o3 n4 _" W" ~- }: Q; \ import java .sql.PreparedStatement;( o' k! R) K6 K; K' s9 @/ O( Z- X
import java.sql.DriverManager;
S' J/ D* i) N* T import java.sql.Connection;5 p& A/ G) s: W
import java.sql.ResultSet;' D5 G- y \& Y m$ R3 e
import java.sql.SQLException;: L& d6 o. d+ s; g( B- _2 K
7 e! F0 [! E+ I, x! ~1 R/ | import com.microsoft.sqlserver.jdbc.SQLServerDriver;
7 z! V' P) N2 p( w5 C- }2 j9 I
' J$ m8 o" X; C e5 x+ L public class NewsBase {! A j9 ~, \* E0 w9 L
( ~$ s. o; k- Q( z1 h, Q5 f8 G" L
private static final String DRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";
' s8 ]4 Y! @1 D- e3 [5 K private static final String URL="jdbc:sqlserver://localhost:1433;DataBaseName=news";
& q( p8 x$ k5 t' S; L! U private static final String DBNAME="sa";& {$ R; `( P9 g0 Z" ^- G) I
private static final String DBPASS="1234";
M: Z! _; \! K3 N- R 4 C+ y3 I1 Y( z2 J, k
public Connection getConnection(){
0 Q) U9 D+ H0 d% c! A Connection con=null;
6 e& n5 A1 p: b3 Q! u8 _" e, M try {+ k" t1 a1 A2 a- b1 [( W* }2 S
Class.forName(DRIVER);
/ I% H! |% w4 u9 |/ U8 F con=DriverManager.getConnection(URL, DBNAME, DBPASS);
% @. O3 A) J" d; C } catch (ClassNotFoundException e) {
+ K0 X( @( j: H: o, C System.out.println("加载驱动异常");
+ K& r6 b: x% M e.printStackTrace();
: q3 C$ E; W+ Z, `' v; v2 ?1 J } catch (SQLException e) {2 O* u) A2 b$ @% l; S# f8 ^
System.out.println("数据库连接异常");
5 V& i0 z4 N) h3 n% y e.printStackTrace();
8 ^4 A" U7 d2 @( u! [2 _ }
. U7 c+ v) P, c5 _. t+ |8 S/ q2 M return con;6 c) V$ I! N9 _ M' h6 W+ \
}/ m! T/ k6 _# s" T" q# _ G: u
7 [3 L- w4 L, n& q# O
public void colseAll(Connection con,PreparedStatement past,ResultSet rs){+ u4 q0 Y8 |8 k+ t) L7 }6 E
try {: K4 a, S& H# [% ~* S( }0 @' q- w: S
rs.close();2 Q/ s" Y, r$ z
} catch (SQLException e) {3 h J. F& \7 b
System.out.println("");" |2 U8 k3 G/ y @# V1 k. S
e.printStackTrace();* I- `8 W& O+ t
}" C' l4 E% `! e$ i6 G/ t
try {8 ?$ k' O! j1 S( p3 ?2 G+ v V, F
past.close();
3 Z) D9 H" {. d1 { } catch (SQLException e) {
9 j# I+ k' l0 S& |. I$ ? System.out.println("");
Q+ T2 t8 t2 O& [ o8 n e.printStackTrace();
3 K$ _; P7 k: f* K- ~ }
* V, b3 y, x5 E5 } try {
% K' f; v3 [2 F) ~ @5 R4 l' n x& g$ g con.close();
" s" N( v* V9 o8 B$ } } catch (SQLException e) {
- W/ P$ ~# _% K3 l // TODO Auto-generated catch block6 E9 F. K% [( n6 x) V( B& l6 E
e.printStackTrace();
" a g! Q2 c3 m }$ k! Q2 R* X% s. _
}2 u# h. F* H, I$ h- O
% G7 d8 a& y6 m7 {% s; X* T public int update(String sql,String[] getValues){
/ W- q/ g& q5 x int i=0; b W. ^2 ^, k8 U, B: W( M
Connection con=null;' |1 X1 X" S/ ]& u7 G5 i6 }1 o
PreparedStatement past=null;
^" ?2 g9 W3 {0 g con=getConnection();, v! @8 e% g# h& G5 {
try {
& f/ U" R1 s Y past=con.prepareStatement(sql);
4 k' Z( g4 w# ?$ [: w if(getValues!=null){
2 r4 \) S X" b! A7 }" m, y for (int j = 0; j < getValues.length; j++) {
9 k2 m5 e& L9 L5 A% o y. S/ X past.setString(j+1, getValues[j]);
a2 x! ^: S: @% X$ z2 y }( T6 ~$ n# v& ~# s
}) ~/ K: J- G1 | z- h5 t
i=past.executeUpdate();
/ `$ i U0 V( h9 ? } catch (SQLException e) {# |9 S R, _, N$ L
// TODO Auto-generated catch block( c* [- c+ t3 G/ a! T3 P3 s; T. F( q
e.printStackTrace();; [5 m; E8 L; P, ?' o' l- \2 Y
}
( ]/ P4 ~' o; s return i;2 D: g$ f! S2 \! k7 G
}
6 F1 E6 V* i6 g" ?! V. r8 _2 O. z }
4 [7 |$ g, q3 X! q- z7 ~/ a 复制代码 package s2.jsp.zhangxiao.entity;
3 ` |& i" ~6 v
7 k$ I P$ W0 W8 S* X4 g import java.sql.Connection;: q- e$ i& h4 e8 R: t
import java.sql.PreparedStatement;" ?1 n5 F9 b& N
import java.sql.ResultSet;
6 A+ x3 D. E' s import java.sql.SQLException;2 }* b3 p7 o! l/ ?& M% [( ^
import java.util.ArrayList;
v# u- s; ^3 [ import java.util.List; y1 Y' y$ n' Q6 V$ t0 S6 P" G7 B# s
# [9 U% R2 m& {- S V
import s2.jsp.zhangxiao.dao.News;
* B z- x: ~9 ~+ X0 I6 o$ C' Q
* H$ B. w5 N# _ public class NewsDao extends NewsBase {7 W3 z0 e$ E+ G2 ~. N4 j
private int count =2;9 w& N1 Y2 A+ ^, G' K1 v% ^
0 n) W+ R# o8 s" P7 |# V
/**, {! g6 S! c3 q: j
* 查询总页数
6 p' u) F# B r. t4 `$ S, ]. L" e * @return8 U# K N/ F9 ^' A3 R
*/
" c$ N7 t2 p4 u9 @) J# e, u* p public int countPage(){
6 l7 v& V' ] m9 D' b int rows=0;
. V7 G. h4 a' A, I! O" q Connection con=null;
9 \, U& Y h' @( E PreparedStatement past=null;0 t. b& \" j( X1 R: `# O- o1 d* P
ResultSet rs=null;
) W! w" i& ]& a5 _1 b5 y3 @6 n con=getConnection();3 ~. I" x. [; }: d' z) C
//查询所有的的页数 返回受影响的行数
R6 y E& P5 K9 i" F) k# ~ String sql="select count(*)as c from news";- s0 e* @$ L% J0 {" L
try {
' @# M/ P c; d4 v3 ^2 l4 _ past=con.prepareStatement(sql);
8 J! [9 S% l: `- b2 W8 N rs=past.executeQuery();
' B5 R% x5 G1 O3 C( m if(rs.next()){ I& w0 Z( _2 z; [
//将所有的行数保存到rows 变量里8 s' m' P6 _7 A
rows=rs.getInt("c");' w1 s& @" R0 G) ^9 }8 P1 y& s
//如果显示两页 count 代表显示的页数 8 ~, H2 z; c: F
if(rows%2==0){* G2 L( B H1 B: _$ v; V* x. Q
rows=rows/count;
; Z5 n6 S1 {3 D! d, a3 d
! |* Z8 G3 R3 e# ~' Y1 i4 i }else{- M* p3 u* X/ c, |7 b& {; D) K
rows=rows/count+1;9 x9 Q6 p& p! h. k% `0 F1 P2 D& r
}
. R/ }$ p% C9 c' l( Y/ g }
: q6 P% ~3 L8 P* n7 [9 l } catch (SQLException e) {: \3 q- m3 M: S/ s& v B3 K
System.out.println("查询总页数方法异常");
Z% [" ]" |. i* @( u e.printStackTrace();
: V2 Z( j, P! a1 K; i }
# s) j# Y1 n1 d- [ return rows;
3 p6 X# }- W# ?0 o4 g) u ~+ N }
2 A! _- c6 J5 A# R% Q/ | /*** Y, s- n5 y8 j6 b$ x/ B, w6 @+ v
* 根据id删除信息
$ {& I5 a6 r. L! ~# p% b! C i9 Y3 Q * @param id6 y3 G$ b$ Z+ U0 c1 W
* @return
, } G) j0 q9 f0 R0 G */
# O1 d1 _7 L( C G public int deleteNewsId(int id){
4 f7 E% b8 U" ^8 J8 ~! G" K String sql="delete news where id="+id;: z. {0 q0 ^# P8 n8 A0 q
return update(sql,null);& o" G6 ?" J M _
}, N K; g. j: v& e+ P+ v
/**/ n3 L- A/ N8 b
* 根据总页数分页4 }# {0 n4 E0 X% I
* @param page
. Y6 X, c. m; `6 L9 B# ] * @return$ s( }5 E% I6 e1 U8 B( H+ `4 z
*/
0 j; Q' @- ~0 `' M public List getPageList(int page){
5 B) d: y( i5 J4 z& l Connection con=null;1 m( h8 E! N8 [" C' h
PreparedStatement past=null;
" D5 M U% `1 v$ {2 {4 { ResultSet rs=null;
, j( i# l& U/ Z6 N5 O, [ List list=new ArrayList();
; ~: R+ a% R3 X& t3 G8 g# I2 q con=getConnection();
# N* K- h; p8 K2 }. x* A: r //
4 q; N2 D1 f3 v- ?/ k: { String sql="select top "+count+" * from news where id not in (select top "+(page-1)*count+" id from news order by pubtime desc )order by pubtime desc";
# u' L( m, C: b' B, T: c try {
+ m/ S0 `" `# C, m! M* K past=con.prepareStatement(sql);. Q, ]. N9 Z4 n
rs=past.executeQuery();
) ~6 P# g- |8 y; }: h while(rs.next()){' i, \" W' l, w0 M: h
4 f0 H$ B- t U; d1 W
// id, title, content, pubtime, author/ E: V; n3 x; X5 r% n
int id=rs.getInt("id");6 ?/ C$ a$ Z5 \, K/ \* A7 S/ T
String title=rs.getString("title");3 R! U+ f( u2 n9 Z4 w4 B4 e
String content=rs.getString("content");( L* |0 a1 m5 O
String pubtime=rs.getString("pubtime");
5 {! U$ O% ]( ^- u( h, g/ b$ P6 ? String author=rs.getString("author");& t' _& c3 d% Y8 }' \ ~" ?/ M
News news=new News(id, title,content,pubtime,author);
) o2 ^! G! A* w+ G' [7 ?1 ~ list.add(news);, U# p. N0 ~: q
}5 y; r/ \/ l) Q; E; B' z
} catch (SQLException e) {
* x0 {; O: S( J; r' W // TODO Auto-generated catch block
( J$ v7 _6 W( m8 ~ e.printStackTrace();" _( y, y0 p% ~' b) H( B
}! f2 I- C2 G1 k: X$ X2 R
return list;
1 Z" v* e1 y5 p0 H7 r G 3 f% _; w3 Q0 q& ~) k H/ q
}
" B" w u) n7 b* i; H& g% i$ M }
$ \ K! G5 b. S/ a* P6 q4 `* a 复制代码
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3 X: N F( R' N& W 源代码以及数据库下载 : # W) v$ C) b' H; i/ a' q! ^$ Q
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