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package s2.jsp.zhangxiao.dao;' u5 {) Z3 Z, C
/**
$ b. j' N2 X# A$ H$ p. t * 实体类+ f9 X* M) O% [
* @author Administrator
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*/
8 n/ P7 j5 w3 Z( d& ]- S( [* I public class News {0 _& }& q. Y9 U( O
// id, title, content, pubtime, author
T, U7 X d# P' T" T private int id;% g/ S" [+ U$ _5 H3 H1 N O
private String title;! g$ }/ c! B, z8 v
private String content;5 J3 v6 G2 y2 r0 S* V
private String pubtime;
' q4 x3 c4 F: {0 l; y6 Q$ [ private String author;
/ d$ Y8 w! G. n8 R, B; T /**4 r5 e- S" c8 X' y
* 构造函数
( q9 `6 p- y- l$ y * @param author 作者" N; i: f, p: o6 }
* @param content 内容
8 J& Q( F& B1 P * @param id 序号
# f! U8 q5 R1 W * @param pubtime 发布时间
5 C6 R: R) m8 B# }& W * @param title 标题
5 G8 e l8 r+ \ a# w! { */0 z& G$ J1 z( |2 h* X4 s
public News( int id,String title,String content, String pubtime,String author) {
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0 I* X8 G/ j# t+ s this.author = author;& O4 v8 D+ Z, Y% O; d: u
this.content = content;
) W* `( K- x4 |+ V% _) T4 N) v this.id = id;+ w# {1 T- O* N
this.pubtime = pubtime;- i0 i7 L9 d8 C4 y8 I0 p3 j
this.title = title;
5 m5 K7 |& q, q& } j2 K* \ }
5 A( D6 N% `, H$ s$ ?1 b. ^ /**
, X- r2 F" N' B' l; \3 w, \6 h' J * 无参构造函数
7 z# V) V5 h4 j2 t- Z% y */
/ h% t0 _# \* R! }+ F! W2 } public News() {' n2 l! t2 B: Z3 r+ b: }: v6 g
super();0 b5 N4 j3 b0 v* a7 j
}" P3 @! w0 b# G8 d
/**
7 ?/ `1 \/ u6 x# p# I' C * get ,set
b( Q( R( t8 T- l8 C5 d * @return6 }( A0 N2 M" N7 A0 T5 D
*/
& A7 u2 w; f0 ~( N7 n$ g3 k/ m public int getId() {
. N J) w7 \7 k) |7 H+ W+ y4 | return id;
6 D ?, T; H, V4 J! ~ }
; N& C' Q) _. Q$ ^: B public void setId(int id) {- B5 h7 D. s# m9 F9 j6 Q# G3 w/ a5 M
this.id = id;
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public String getTitle() {9 d& M2 @ P) E( Q
return title;9 m; ~$ @1 N; [3 w! Q7 P! U/ J. B
}
- ~3 I9 z. q/ X& m public void setTitle(String title) {
% c# j+ M* z- c: ~1 g( i; |8 m this.title = title;
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public String getContent() {
: w4 M7 y) _5 p; Y: Y+ B- p! ` return content;
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public void setContent(String content) {5 M+ h, u& w8 F- ^- Y' @& V8 Y
this.content = content;4 X4 n, o4 ?$ Z1 M$ L. t: s
}
# D; A3 B* i/ k2 K public String getPubtime() {2 L: _ D& L% A1 C
return pubtime;
! e4 |: K- X& t! u8 ~ }
0 J: z3 U1 f0 U/ l( }% r! W public void setPubtime(String pubtime) {
7 Y* g* A0 l# f* U7 u this.pubtime = pubtime;: k5 N: l& ^9 G- t
}
. @5 m' `; l l; N4 Z public String getAuthor() {1 }1 i4 \) z6 ~; a/ J% N
return author;$ a6 M: {" }8 t' t+ @" ~
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public void setAuthor(String author) {
9 Z3 Z! h8 g9 j4 I F& E this.author = author;& m4 D# q( A/ G8 R |! i
}
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% G* k) h5 Q. Y, f& J3 a* u" ~6 f% T ~ 复制代码 package s2.jsp.zhangxiao.entity;8 E8 Q2 B+ i9 Q6 v* r& K& M
import java .sql.PreparedStatement;
1 B+ `! `1 O/ s. s0 A import java.sql.DriverManager;( Y$ }2 b4 o% L- k* f1 ^( K8 m
import java.sql.Connection;
( p+ Q# o- m* A4 R* W import java.sql.ResultSet;
9 {# L9 u+ u8 P0 D1 v9 x; F import java.sql.SQLException;
k9 v$ ~" T% V$ C2 y" K
3 {" M3 [2 j! b9 S# O6 c. v import com.microsoft.sqlserver.jdbc.SQLServerDriver;) F; F. u3 `2 D/ {* `
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public class NewsBase {2 M/ }* @( B5 ^4 l, D
. R A0 X9 Y$ F. O0 S private static final String DRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";
# E" @ r7 R" C4 ` private static final String URL="jdbc:sqlserver://localhost:1433;DataBaseName=news";
/ W7 @ H& B/ @ A3 m+ Q( v% @ private static final String DBNAME="sa";& B; e2 h j& U8 k( H
private static final String DBPASS="1234";$ V' ]7 f- c1 a
$ i% B1 C9 {* z) W public Connection getConnection(){1 g3 m) _8 Z( ]( P9 J; D
Connection con=null;
- g4 U2 d: L- v5 ~$ { try {2 A- m$ J+ M" I' p5 R, N
Class.forName(DRIVER);
# p/ M" |( j8 T1 |# Q con=DriverManager.getConnection(URL, DBNAME, DBPASS);6 s' [/ |2 ^/ q7 o! M5 A3 m; u
} catch (ClassNotFoundException e) {5 Z( Y% k% [7 c5 I; H
System.out.println("加载驱动异常");* r5 R5 ]; _& u' _2 C0 z
e.printStackTrace();7 h# _% R/ S9 r% A i2 Q
} catch (SQLException e) {) e2 Y' n8 N! S: ], n6 M
System.out.println("数据库连接异常");+ ]: F j4 y2 i( z
e.printStackTrace();
, B# m+ n3 [1 D }
" j1 {3 t3 J/ q$ ~6 Y0 n9 M return con;# H$ U/ s1 a; {! W+ s; C1 f
}
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/ ~, c5 L" [' W4 l public void colseAll(Connection con,PreparedStatement past,ResultSet rs){
* Q7 h6 b- H8 @* T try {
' b1 H7 O4 N, q. S- Y8 v rs.close();' B, C7 p; {0 L: s4 Q' K% j) \
} catch (SQLException e) {+ b1 u8 D; G- O$ \! p4 i
System.out.println("");
% t! X# [! O: f" K# R! P/ M. ~& O e.printStackTrace();. {) F$ A5 m3 K' ^4 N
}
2 M- j& ?& q" n try {
6 p4 _, Y$ }! [# _& O past.close();
& n3 ~. e9 H) r2 @; G6 v4 q( d } catch (SQLException e) {: W' H! {8 ]4 ~% M: x& h" R2 t; c! h
System.out.println("");
- E4 G9 Y$ h4 B$ Z0 s8 e e.printStackTrace();
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try {' @" y% C) z0 @5 [7 [* }
con.close();( L. f* ] e% k+ P
} catch (SQLException e) {& c- k: b$ E* e x# x% t
// TODO Auto-generated catch block
& m6 c) T [+ r3 a e.printStackTrace();
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}
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public int update(String sql,String[] getValues){( V( G0 ^8 B2 z& J0 e0 u
int i=0;
; N3 t( D# R1 \, b Connection con=null;2 F+ z p) ?7 k3 \& h
PreparedStatement past=null;% F) |6 ^6 S+ u0 v0 U
con=getConnection();3 ~0 }' n% q+ S( H5 u% ?% U4 o
try {
$ ]6 W) M8 \6 L- W; n6 u past=con.prepareStatement(sql);; ^! C+ X8 R- I1 H* M3 U
if(getValues!=null){8 U7 \/ k/ Y$ }; W R& i, v2 @+ S5 R0 h
for (int j = 0; j < getValues.length; j++) {8 S% S7 h' M" n" k! e
past.setString(j+1, getValues[j]); _6 B G L" ?1 C* l4 b2 Q
}" {8 e' z/ D: ]2 N7 J: {) a" ~
}
# _" O/ K& l- W" Q, N( t+ ^ i=past.executeUpdate();
( e+ C; E! H$ \# u% Y+ |. f5 L } catch (SQLException e) {
# s6 ]4 Z( R n) Z$ |: _9 `0 w0 A9 l // TODO Auto-generated catch block6 S: r3 O3 D. ]) B1 Q
e.printStackTrace();
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* _3 e$ m, T/ c: P9 _ return i;; |) u7 u! C& g% @
}# F' |# Q4 [ L! J) N
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复制代码 package s2.jsp.zhangxiao.entity;
+ Z/ S. A2 ?- S" W' p |- O/ D7 Y
% Y" u1 F) Z: r9 H import java.sql.Connection;: b- t& d- w# J# s+ T' q
import java.sql.PreparedStatement;
: V8 |- k2 H6 w* n import java.sql.ResultSet;
3 w: x8 x3 h. I) K/ T$ P import java.sql.SQLException;
9 D5 `: W! Z* i! Y# Y import java.util.ArrayList;
1 ^( S1 N6 X; A% d+ ^/ d import java.util.List;
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import s2.jsp.zhangxiao.dao.News;% q; l% ~; m4 _
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public class NewsDao extends NewsBase {: B U1 w% h% B, p' Z7 `
private int count =2;
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/**) D: \6 n% k7 K( L. d4 x& W
* 查询总页数
( C; X; g6 Z) w' x9 n2 t) h: D * @return4 N, N1 k4 H) W5 U, y1 Y9 I: R
*/
' t! Q2 |; @3 h; U0 c) P9 v public int countPage(){+ v% C/ O, g+ ~# v! {3 s# j& P8 X
int rows=0;
9 Z7 a3 j' K8 m/ ^ Connection con=null;
0 N6 {9 P, w1 n ^+ Y PreparedStatement past=null;
5 s. [/ l1 u7 f3 K9 z+ M4 A ResultSet rs=null;
8 X; _9 b, B6 m& E7 d con=getConnection();& ~! H, `3 w# h9 N' U4 \5 Q
//查询所有的的页数 返回受影响的行数
# Y1 Z2 ?+ _3 |1 `' Y8 G String sql="select count(*)as c from news";
1 n y, Q* `: E0 T, x" `" h try {2 b P8 i; M. f" ^" m
past=con.prepareStatement(sql);7 b# O0 O4 [2 r6 K4 g/ T# |
rs=past.executeQuery();
& W3 { e( a5 c5 `7 x7 ~ if(rs.next()){% y- O3 y* [$ n( ]
//将所有的行数保存到rows 变量里
4 ^* [5 z! G; f5 W2 }3 |" C. c rows=rs.getInt("c");
0 ]( t3 N% L. l$ v //如果显示两页 count 代表显示的页数 ' t# Y; X: ]$ u, h
if(rows%2==0){
1 B5 N* K$ {- ^3 M+ k rows=rows/count;
* i8 ?4 l% U: H* U 5 p5 O* a @* y# H3 l5 z/ U
}else{. E$ ~/ V3 s& V5 P, {
rows=rows/count+1;* A5 A6 O( [6 I' V/ g+ J
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}
; U6 `) ~( k( q1 Z' [. D* q } catch (SQLException e) {5 C( E& S" `+ j, q4 V
System.out.println("查询总页数方法异常");
; j h/ b& g( B3 Q e.printStackTrace();
0 }- ?$ m; l2 [/ p/ S L! Q }
0 S+ u) }( R; l0 N% P) e return rows;7 z# ?/ y% j+ n0 \
}
. w- W# ~+ g7 r( s7 y# ]" c1 _% O l: J /**
$ e8 I0 E9 C1 K0 _- n/ B- r * 根据id删除信息/ X3 {- j+ i+ ]: b3 N! T) u" W5 T
* @param id
* Z% t* s( B2 k$ F6 L% I- m * @return
0 d2 g& T6 I. a */
* e) ?# U/ A" B public int deleteNewsId(int id){& I" A" I4 Z% @6 v% r" Q
String sql="delete news where id="+id;- t: f* i e! R* F/ u
return update(sql,null);2 K2 a, I/ {- Q
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/**
- A. w: W# [1 ]1 i * 根据总页数分页
0 N, k( \( R) ~3 y * @param page% G F# |* `5 `' K q2 u$ I
* @return
4 Q/ b# k& z% R& L: D! s/ d. ~& R */6 D% @$ y; Y9 h; P
public List getPageList(int page){$ ^' x* S; g" Y/ A" S
Connection con=null;8 L( f5 q- F. c- ?6 a' t6 l( j
PreparedStatement past=null;" Z. U! s" ` O, `+ {- a5 n
ResultSet rs=null;
) N$ ^" f0 b. F; E List list=new ArrayList();
; D$ C) p" k! k1 l3 ] con=getConnection();
* s* \4 }3 k" {9 S //
( d# U: M8 ?6 k4 Y. p2 P9 w 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";, j2 d4 G' J! U) V1 d0 h/ U
try {
& Z/ e/ i, z* _2 u past=con.prepareStatement(sql);" Q1 b H p' |+ m J. B
rs=past.executeQuery();
0 T1 @- j+ n% N9 u, N T while(rs.next()){, p2 p; N [# f9 g3 S+ i, G5 t
- E$ x: e7 l b
// id, title, content, pubtime, author
" q0 z0 D) N! ^( M6 f% B7 B int id=rs.getInt("id");
G2 R! r6 g- `3 A- m String title=rs.getString("title");) [) {4 t' @( c' h. m
String content=rs.getString("content");3 D7 A7 W% ~5 d$ d( H+ o
String pubtime=rs.getString("pubtime");, b$ R4 e& r8 S w/ n) C- p! l
String author=rs.getString("author");
. b2 t- M n- o8 G+ f4 I% k0 t News news=new News(id, title,content,pubtime,author);# S4 G* W& {" W4 ?, C# x
list.add(news);/ p; _: S( j8 V( W- X0 p# ^
}
8 W K$ e) ^, V7 K! R1 H } catch (SQLException e) {
6 b, S+ Z" b9 J) o# H7 R // TODO Auto-generated catch block
/ ?$ w: O/ t% s/ G e.printStackTrace();
{, Q- a6 T0 [. x* ~ }
1 _. @" @' H, |/ n: c; p return list;* ]: O: D5 ^% ^5 S
* J- K/ i: l9 S" q1 p+ R1 N: d
}# {, x9 u- A% }/ w
}
; F N+ l8 I( Z. r 复制代码
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9 o1 w. @) U1 R9 L5 w" ? 源代码以及数据库下载 :
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