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package s2.jsp.zhangxiao.dao;
( I- }) j+ ^2 S+ { /**
+ U) E! h! G2 G5 c% u2 z/ i * 实体类
2 @4 o1 T! m% d/ t) b: w * @author Administrator
6 a2 W( z2 `' m K *# _9 [0 b% [$ y
*/! }1 ~7 p! ?' C8 b
public class News {
+ s |4 T. {: a' G+ T3 e! Y // id, title, content, pubtime, author {" w! U, C3 l* Y! C6 o
private int id; |# r6 S" s/ x) Z
private String title;, P& \+ X5 X/ J: g$ H* X+ c
private String content;2 p' V1 e! q7 e8 S0 r% c* Z6 L+ x
private String pubtime;
& [/ b7 {4 O. F2 C/ } private String author;
/ ~" }# x0 Y, g' q% ^) N4 q /**" S; ]2 b: b/ T4 D& g5 Y t5 L2 I& ^
* 构造函数1 p1 T' t2 n+ g: Q8 P
* @param author 作者0 V: G& G& N0 } V4 o" J
* @param content 内容
( m; B: _' p& X& I- y * @param id 序号
9 r9 ?% H- T; E n * @param pubtime 发布时间
/ B3 z) v( K' L6 G2 p * @param title 标题, Y% B3 _. F& F
*/6 [( V; i( ~! ~6 b/ y! h5 }
public News( int id,String title,String content, String pubtime,String author) {4 I3 V6 N2 u( G6 d& ]
# x3 @8 t8 H7 \6 e( R( v
this.author = author;9 k5 _7 m6 [( i
this.content = content;
+ |1 B7 X: W9 d3 T' q this.id = id;
7 c l9 ^& M' K7 X+ X this.pubtime = pubtime;
! o* t. U, W0 L( ? @ this.title = title;
0 \1 l6 O) d0 Q }
, k! V7 X( x5 r, E$ } /** n" C4 [% z. I8 M
* 无参构造函数
! |8 {8 G- e9 A */
+ v2 w! S' y0 G1 i) H6 R$ s; } public News() {
' c' K8 m1 ^* \2 ~, Q4 l super();
" ^0 F: c" J, T2 z9 r3 I8 n }
1 f, r% o U) s$ V4 P /**
8 T9 x0 B' _9 q" f( ^ * get ,set e' A, p q' _1 B9 ?
* @return
4 T# H) o ]" f, L& Z9 g */2 `, w% ~, f7 L3 w5 g
public int getId() {# M( |7 z( \( R, W
return id;2 A( p% U+ m/ Y
}8 k; `& L1 i: y
public void setId(int id) {
2 G+ n$ E# n Y0 R this.id = id;4 x. I- s2 x+ b3 n9 L" S
}! z5 ]. R2 G* I( V1 F( a
public String getTitle() {
% P) l' G5 ^/ x+ ?. H2 |& p return title;1 W) J9 m' u3 p3 g- ~
}3 g% Z% m0 d! ?9 t+ s- J
public void setTitle(String title) {/ a: n" w. I0 N& X3 ]# ?# F9 x6 z
this.title = title;7 c( a7 b! H* e: J- e
}3 O6 N1 H$ {' q6 ]/ l$ S
public String getContent() {7 A. @. B7 L/ n3 p
return content;) \6 B' Y' K2 q; J# ?, Q
}0 o7 S/ s: L, v ~2 k1 L
public void setContent(String content) {
6 I1 l+ h6 z2 | this.content = content;
& S# e9 d c5 o }
! G0 u2 K- N5 M; F public String getPubtime() {$ s1 U8 B: k4 c* C# w
return pubtime;* c& ?( n% @$ {* `' `0 y; F3 A J
}: y w, G5 c1 w; Z7 Y2 d; u
public void setPubtime(String pubtime) {/ { Z, \" ^' W4 h0 }: m+ [
this.pubtime = pubtime;
' }# S* A. @0 F, u }! F* s. \; q! W2 @
public String getAuthor() {
/ l" i4 k Z8 ~2 U9 } return author;% c9 X! M3 f5 m6 l- @9 p
}
; V- h. t# C6 w" |2 x public void setAuthor(String author) {- q9 p- P1 t2 M( p" e0 G# z9 R
this.author = author;
# L2 Z6 K. m9 d* d1 d2 { }1 f! {) v( h2 i2 }, [& w ]1 w
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复制代码 package s2.jsp.zhangxiao.entity;
, d& R4 Z% R, c/ C# f import java .sql.PreparedStatement;
/ [; L* G3 i& |( ?0 H* a( J% X import java.sql.DriverManager;
, w2 ]# [2 C& ~/ N0 j# x% d import java.sql.Connection;
$ J: n. N/ M' b import java.sql.ResultSet;: u& H; X$ S3 ~& |, L
import java.sql.SQLException;
! T6 K$ Y' }6 N2 h7 n) E
! p9 Q( e0 n' F+ E2 T4 Y import com.microsoft.sqlserver.jdbc.SQLServerDriver;/ c7 j N! O0 h9 V* W" J
0 y$ O5 b- T+ @ public class NewsBase {/ c7 S# ~0 A# R" e. m ^( }0 w
: g6 @1 n( d" m) V' ]# v1 E) o3 @
private static final String DRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";
1 I; W. n# o6 v2 x! z private static final String URL="jdbc:sqlserver://localhost:1433;DataBaseName=news";
+ v9 `. Q+ v$ i! w$ j' W) k' y2 k t private static final String DBNAME="sa";" X! ^: A' u* A# y" T1 z
private static final String DBPASS="1234";; d( r0 l) I- {& M o8 k
9 U/ @) T+ v& C% R( X! a- e public Connection getConnection(){3 S5 s9 Q4 [8 e3 b2 @
Connection con=null;
4 p% v" F+ V" N; q! @ try {
3 A6 }, v' g0 ]; b4 A: S Class.forName(DRIVER);
( S* Y8 \) I+ {2 a con=DriverManager.getConnection(URL, DBNAME, DBPASS);& u; t8 g& D1 C% g
} catch (ClassNotFoundException e) {
. H2 l4 l a6 u System.out.println("加载驱动异常");; E% @. `! z9 x7 |# F# H: A/ w
e.printStackTrace();4 Q1 U) ]" ]! Z$ V9 k
} catch (SQLException e) {; x; w- ?/ b8 K# H |" K
System.out.println("数据库连接异常");; d1 |* ~& X" X; [3 T! N6 X/ M! s( j
e.printStackTrace();) F h' a( K3 P+ N/ t
}7 A8 ^" l: h# e* l! ^( ` O
return con;# N4 h8 B0 I4 p2 F7 J3 F0 s" C
}& Z4 v( ^! @; D3 Q$ ^4 M
% I+ Q$ r9 O0 t* l; S' K7 Z% w public void colseAll(Connection con,PreparedStatement past,ResultSet rs){( G% K" u4 r4 @1 a2 ], S+ h
try {
6 A# v. B9 Q* q q rs.close();7 `: t' C6 W4 v0 Q+ T6 E
} catch (SQLException e) {; _, R8 D" [, u3 n& q' \/ g
System.out.println("");
" W6 M5 `8 \, B e.printStackTrace();1 M0 x [) s& b) E* z' Y# \' y
}0 O' \& f- {+ b: b, ?* F, r& g8 j
try {
0 h; E0 n5 j8 y0 v3 \ past.close();
2 s3 d6 Z# |. p }. _6 [3 w } catch (SQLException e) {- `0 t) z. ^6 ~) U# l X
System.out.println("");
0 O) `1 |; v6 F) W8 ~9 G& `6 c+ ^0 [ e.printStackTrace();& b' h( K- h9 M$ Z+ k
}6 h. Q1 R# j' U+ V5 |
try {
9 w# Q1 ~; j- V) c con.close(); w' T* K; V, B7 v% w# d# O8 A b! V
} catch (SQLException e) {9 ~& W6 O3 j' k+ R1 Z
// TODO Auto-generated catch block& O7 N' ]. D& _. X! g3 D
e.printStackTrace();3 \# `( \! D7 A; C
}6 ]5 w3 X, Y, P2 b- G4 ]/ W' t2 y: h
}
6 X( D: }1 \+ A8 f8 N2 ?2 u& t3 V ! |& c5 T7 G& |% p2 z
public int update(String sql,String[] getValues){
2 E4 C9 M" F$ E& k0 i; Q int i=0;
9 I* e& u8 S" g D6 y! x. y+ j Connection con=null;
+ ?$ h9 _7 e- N0 g, ]4 a PreparedStatement past=null;
8 n# [ x0 W% \- c" V3 v0 H con=getConnection();: j0 G/ S8 x0 z/ N+ z' e- F( N9 C- n
try {- Y8 } W9 n& P1 F, t
past=con.prepareStatement(sql);
& w7 Q7 x3 Z3 V$ X" r" r" U if(getValues!=null){
: x; K+ E( H u' L) }! l: D- F0 Q for (int j = 0; j < getValues.length; j++) {
& {6 e! l. {" _& i0 m6 ]6 [4 a past.setString(j+1, getValues[j]);
) d' G6 k" a& h6 I# k# G/ I/ w1 M }
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i=past.executeUpdate();5 M3 |' U$ m, ^6 m
} catch (SQLException e) {
- c7 n% R( k1 D; z9 \ // TODO Auto-generated catch block, D$ ?1 n1 {$ D3 U
e.printStackTrace();% u8 i" [( B) s4 N+ d( G
}
$ d V& @8 m$ }$ u: V" w return i;( A: L; k( z9 R9 M
}
( U6 s- k% Z+ w( O }+ {7 {7 D% F' { s0 W p6 Y
复制代码 package s2.jsp.zhangxiao.entity;( ^( b* B \& c5 u, U' z
5 P; m8 x" J J
import java.sql.Connection;. _1 {1 F/ p6 Z( ]
import java.sql.PreparedStatement;7 |# _6 ]5 e" A8 U2 U$ V
import java.sql.ResultSet;
0 n6 S$ M6 m x E; a. N- Z( S import java.sql.SQLException;
5 \4 x& \% U' ^, d# j' R import java.util.ArrayList;
+ i$ C7 V& a0 s w! O import java.util.List;# M2 T1 ^+ X0 |
+ i# P) q0 q# J8 D' f
import s2.jsp.zhangxiao.dao.News;: T$ Y) C, \ |6 c. g
1 r5 q$ c$ X6 B5 a public class NewsDao extends NewsBase {
6 y2 z9 K# z* F( N2 M private int count =2;
- P+ c: \3 U4 p9 ~# T * I7 G8 a8 e+ p! ^
/**; C$ T# W% ?+ M! _& [; P$ v
* 查询总页数
# k. g7 ^3 @6 o * @return
2 E1 d. e) w% Q; s4 M+ K s- N */
4 i3 J: W2 [+ U( _* C: ]0 O* i public int countPage(){
- f/ S1 b5 B7 d# ~8 K0 s1 Z: ]9 M int rows=0;. w8 C5 M+ n1 q2 ^2 Y
Connection con=null;9 {! F m: b! K% Q0 ]
PreparedStatement past=null;
" Q$ u2 f( m; l: N' N6 I ResultSet rs=null;8 ?+ |2 H5 w+ t0 L% u
con=getConnection();! I; [1 D& K( ?7 z7 X
//查询所有的的页数 返回受影响的行数! G/ R2 g, `1 L* S% t9 W
String sql="select count(*)as c from news";
: ^9 d2 H W) y3 {! m, \% Z try {$ f+ W2 K% O" w
past=con.prepareStatement(sql);8 O! C5 [! `9 F' \
rs=past.executeQuery();, g# W. ?& {" C/ f5 ]1 t
if(rs.next()){
+ Z- O) ^* F5 L/ C8 L; R //将所有的行数保存到rows 变量里
5 ^( r- G8 {' w; l- }, j rows=rs.getInt("c");
. W5 O8 D! w: G1 E% ?$ k! Z: I //如果显示两页 count 代表显示的页数
7 N3 B+ s$ u, ^6 ]5 p, \, X if(rows%2==0){
* K6 ~' \+ [7 \ W$ w4 F& l rows=rows/count;
( R2 M+ X! B$ t, O3 `
1 h. o- v; m+ N/ r! S }else{, F6 ]( @/ T. @
rows=rows/count+1;
! J3 n( |4 {* ^; J# v }8 C- D/ J# K3 e' X9 x/ V
}
. ?: L, V7 \5 k, | } catch (SQLException e) {
& {4 q9 D0 Y9 ^/ e1 d3 D System.out.println("查询总页数方法异常");) K& s, x( _) e/ y$ ^% q
e.printStackTrace();+ I6 W% h# G- a5 y% n( M: Q. c. v
}
, d& y# Q6 U S return rows;* q9 X7 O5 p: C- Y! `
}; ]2 q4 I! T9 I6 ^
/**
9 F1 |' F: p B' ~ * 根据id删除信息
% Q- h% g2 N) | O- | * @param id8 x0 T9 G4 g: ]$ Y2 t8 g
* @return
9 m. u9 v. c; D/ U6 a1 i- K */) W/ z; x5 F# W1 G- x
public int deleteNewsId(int id){
3 H( s0 x! e! m$ t String sql="delete news where id="+id;7 r9 d: U: H% z$ Y4 [& w, n
return update(sql,null);8 x3 ^6 ^, F, H: u% }& O9 h
}4 A& u, ~6 Q8 V- _! n
/**
1 ?( W5 j6 n6 x7 S * 根据总页数分页1 p: r, S& D& `1 ^2 R$ }1 U) ~. ? \
* @param page
8 |: v- b$ I5 k2 o0 y * @return, K8 T' ^7 p2 k6 l# o
*/
_: z0 f) m: i1 k5 v public List getPageList(int page){
, ^: ?9 G& H) T Connection con=null;" _+ g1 X$ ~ L) c/ p
PreparedStatement past=null;
) x% {" h0 t: c% Y0 \ ResultSet rs=null;6 Z+ u! S6 {5 w! F+ g9 ~6 B( A; G; j9 X
List list=new ArrayList();- {6 k0 N% Q5 ?+ I* A. Q* r
con=getConnection();
) a* r8 |* ~) V //
# O! }- k0 W1 r) m9 W3 z1 C+ | 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";) \3 F" n3 O6 l4 v0 U
try {
, M" v' Q6 ?# @1 M2 r. @ past=con.prepareStatement(sql);
8 i6 @3 c1 d+ O1 G8 J3 i/ X rs=past.executeQuery();
, |$ h; r) \: N. D+ k' e while(rs.next()){0 u. i- R" B- O
2 c& J0 C/ x8 C! o! M // id, title, content, pubtime, author
: K1 [- d; c1 d% ~! P int id=rs.getInt("id");
[5 S% R) P) l A# Y String title=rs.getString("title");$ V# g# p: _" N/ J" j
String content=rs.getString("content");3 y: o" H- T1 V# e5 o3 z1 J* L0 b- @$ \
String pubtime=rs.getString("pubtime");1 c0 k, G, z- z) |+ Z
String author=rs.getString("author");
# q/ | r# R# L" g1 j6 a News news=new News(id, title,content,pubtime,author);
" H; {# m' L* E# ^3 m( a: n2 ~ list.add(news);" s8 c/ T* F5 H" L# N. w& n E
}# R2 F: k0 h( `; W# D! M1 M0 u3 r
} catch (SQLException e) {
1 ]' W e9 I1 e# e4 x // TODO Auto-generated catch block1 D( \) j9 o# C0 W, j( S4 H
e.printStackTrace();' I; V3 ^& {! i% @4 |% _* G
}
: d6 E% {8 o3 V1 o& M8 O4 r: p return list;
2 l) t. x, G* a7 n9 k
. {, _$ }- |: f" g/ o }
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复制代码 - a! ?+ p4 s, E T- j$ F
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源代码以及数据库下载 : # `9 C# G; r. {$ g/ u
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