用Java语言实现的各种排序,包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。 M
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插入排序: SQN{/")T
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package org.rut.util.algorithm.support; 5f75r
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import org.rut.util.algorithm.SortUtil; BF"eVKA
/** %Rf{v5
* @author treeroot 4-9cp=\PE
* @since 2006-2-2 g@]1H41
* @version 1.0 d
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*/ BWr!K5w>i
public class InsertSort implements SortUtil.Sort{ 4$4Tx9C
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/* (non-Javadoc) fT=ZiHJ3Gu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I/gfsyfA
*/ W k "_lJ
public void sort(int[] data) { |aj]]l[@S
int temp; H~:g=Zw
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); -$kbj*b##
} k8cR`5@PK
} swMR+F#u*
} S<5.}c R
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} $U2Jq@G*
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冒泡排序: S)"vyGv
i,L"%q)C
package org.rut.util.algorithm.support; hJX;/~L
% QaWg2Y=
import org.rut.util.algorithm.SortUtil; 9gZS)MZ
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/** z[JM ]Wy
* @author treeroot }(WUZ^L
* @since 2006-2-2 V3axwg_
* @version 1.0 @Q:?,
*/ S Z &[o&H
public class BubbleSort implements SortUtil.Sort{ Rb
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/* (non-Javadoc) k;.<DN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UYpln[S
*/ rWBgYh
public void sort(int[] data) { $<f+CtD4
int temp; clr]gib
for(int i=0;i for(int j=data.length-1;j>i;j--){ Z
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if(data[j] SortUtil.swap(data,j,j-1); Ge24Lp;Y6
} oJI+c+e"
} W\e!rq
} t2qWB[r
} (e3?--~b6
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} \d w ["k
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选择排序: :m(" oC@}
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package org.rut.util.algorithm.support; NE Z ]%
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import org.rut.util.algorithm.SortUtil; |8\et
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/** +:z%#D
* @author treeroot y|WOw(#
* @since 2006-2-2 [U{RDX
* @version 1.0 'b_SQ2+A
*/ ^Ux*"\/Es
public class SelectionSort implements SortUtil.Sort { A^F0}MYT
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/* PU\@^)$
* (non-Javadoc) Ki3wqY
* O[^zQA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MO79FNH2\
*/ v2mqM5Z
public void sort(int[] data) { jF5oc
int temp; ?=?9a
for (int i = 0; i < data.length; i++) { yF^)H{yx
int lowIndex = i; Q\$cBSJC1
for (int j = data.length - 1; j > i; j--) { "C+Fl
/v
if (data[j] < data[lowIndex]) { PmDar<m
lowIndex = j; |>nVp:t^
} ,q
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} uL@'Hv A
SortUtil.swap(data,i,lowIndex); T9gQq
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} iLFhm4.PO
} yMf["AvG
iHyA;'!Os
} y;HJ"5.Mw
7JP.c@s
Shell排序: Zg!E}B:z
55`cNZ
package org.rut.util.algorithm.support; f&Meiu+
f/=H#'+8
import org.rut.util.algorithm.SortUtil; *\[GfTL
OH~I+=}.
/** [m]O^Hp{{
* @author treeroot [zl"G^z
* @since 2006-2-2 O[&G6+
* @version 1.0 p2Fi(BW*q
*/ 71Mk!E=1
public class ShellSort implements SortUtil.Sort{ C6,W7M[c
lb #`f,r>
/* (non-Javadoc) 79MB_Is]s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D5
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*/ z^9df(
public void sort(int[] data) { $qhVow5~
for(int i=data.length/2;i>2;i/=2){ FDRpK5cw
for(int j=0;j insertSort(data,j,i); #'kVW{
} I*8_5?)g<
} a~[]Ye@H
insertSort(data,0,1); 26c1Yl,DMn
} u|E9X[%
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/** m2Q#ATLW
* @param data wB0ONH[
* @param j ed7Hz#Qc
* @param i -"3<Ll
*/ N/mC,7Q
private void insertSort(int[] data, int start, int inc) { A*hc
w
int temp; {-\VX2:;[9
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); 2<5s0GT'/
} TWgI-xB
} "@E(}z'sM
} q
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} ?QCHkhU
Y<-dd"\
快速排序: \~ h7
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package org.rut.util.algorithm.support; o@G
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import org.rut.util.algorithm.SortUtil; To19=,:
m/W)IG>
/** }c*6|B@f
* @author treeroot *HN0em
* @since 2006-2-2 q9c:,k
* @version 1.0 b7bbrR8
*/ nA^UF_rD-
public class QuickSort implements SortUtil.Sort{ B^uQv|m
{EGm6WSQ^
/* (non-Javadoc) uia-w^F e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &/A?*2
*/ ? k*s!YCZ
public void sort(int[] data) { O
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quickSort(data,0,data.length-1); ,~-
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} u!&Vbo? .B
private void quickSort(int[] data,int i,int j){ j:{d'OV
int pivotIndex=(i+j)/2; "J%/xj
file://swap 3EKqXXzOB
SortUtil.swap(data,pivotIndex,j); 38T2IN
cB9`U4<
int k=partition(data,i-1,j,data[j]); YkLEK|d
SortUtil.swap(data,k,j); \[w82%U
if((k-i)>1) quickSort(data,i,k-1); B?r [|
if((j-k)>1) quickSort(data,k+1,j); {!hA^[}|
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} #b4Pn`[
/** @l:\Ka~TS
* @param data wA<#E6^vG
* @param i niV= Ijt{5
* @param j YS5 Pt)?
* @return 29E9ZjSK
*/ Iz\IQa
private int partition(int[] data, int l, int r,int pivot) { PO[
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do{ )0JXUC e
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); dF%sD|<)
SortUtil.swap(data,l,r); %Ot^G%34
} 438+zU
while(l SortUtil.swap(data,l,r); 9RoN,e8!
return l; -\!"Kz/
} +;Jb)8
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} w|>O!]K]
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改进后的快速排序: \{ G1d"n
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package org.rut.util.algorithm.support; 9+\3E4K
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import org.rut.util.algorithm.SortUtil; r9@Q="J_)
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/** zl j%v/9
* @author treeroot it~>)_7*P
* @since 2006-2-2 ^L(}c O
* @version 1.0 ;$\d^i{N
*/ /CAi%UH,F
public class ImprovedQuickSort implements SortUtil.Sort { S&@uY#_(*T
1dF=BR8
private static int MAX_STACK_SIZE=4096; KN;b+`x;M
private static int THRESHOLD=10; hYW<4{Gjr
/* (non-Javadoc) OIa=$l43C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =kUN ^hb
*/ (!U5B
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public void sort(int[] data) { iQ9jt
int[] stack=new int[MAX_STACK_SIZE]; GyOo$FW
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int top=-1;
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int pivot; joh=0nk;D
int pivotIndex,l,r; <=*xwI&q
q*oUd/F8
stack[++top]=0; 1B;sSp.>
stack[++top]=data.length-1; \*s'S*~
H|H!VPof]
while(top>0){ Yq.Cz:>b
int j=stack[top--]; 8#w}wGV*
int i=stack[top--]; )}
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pivotIndex=(i+j)/2; vb-L "S?kC
pivot=data[pivotIndex]; /u
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SortUtil.swap(data,pivotIndex,j); A`4j=OF\
:mU,g|~55
file://partition 42?X)n>
l=i-1; Pgs^#(^>
r=j; c_]$UM[7L
do{ 95,y@~*]
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 9Kw4K#IqQ
SortUtil.swap(data,l,r); 2bS)|#v<_t
} fo$iV;x`
while(l SortUtil.swap(data,l,r); :cmfy6h]
SortUtil.swap(data,l,j); 8 Vj]whE
SB1\SNB
if((l-i)>THRESHOLD){ @O<kjR<b
stack[++top]=i; xr)Rx{)3h
stack[++top]=l-1; K4i#:7r'b
} zlmb_akJ
if((j-l)>THRESHOLD){ 2yhtJ9/
stack[++top]=l+1; >WMH.5p
stack[++top]=j; kE tYuf^
} |*0oz=
5rqjqfFa
} *s/sF@8<X
file://new InsertSort().sort(data); ~l%Dcp
insertSort(data); AAkdwo
} @ba5iIt
/** s%Q
pb{
* @param data -Rhxib|<
*/ lM C4j
private void insertSort(int[] data) { W
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int temp; ?w1_.m|8u
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); m&DDz+g
} B&_ 62`
} Ud0%O
} >A|6kzC
h3D8eR.
} %b2.JGBqJ
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归并排序: .!Kdi| a)
h[%`'(
package org.rut.util.algorithm.support; *usfJ-
P@:#NU[
import org.rut.util.algorithm.SortUtil; \Nu(+G?e
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/** KUVsCmiT
* @author treeroot gEtDqq~y@
* @since 2006-2-2 "xlf6pm%
* @version 1.0 *TA${$K
*/ !mrB+<:
public class MergeSort implements SortUtil.Sort{ ~zFs/(k
Zgo^M,g
/* (non-Javadoc) JY#IeNL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
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*/ LWc}j`Wd
public void sort(int[] data) { |]~tX zY
int[] temp=new int[data.length]; Gd`qZqx#
mergeSort(data,temp,0,data.length-1); )JTh=w4n|z
} nI%0u<=d
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private void mergeSort(int[] data,int[] temp,int l,int r){ {j[[E/8N!y
int mid=(l+r)/2; g.X?wyg5
if(l==r) return ; $BG4M?Y
mergeSort(data,temp,l,mid); {Q?AIp6u|
mergeSort(data,temp,mid+1,r); 5UR$Pn2a2
for(int i=l;i<=r;i++){ JQ'NFl9<
temp=data; `h(JD$w
} umYq56dw
int i1=l; 'Zf_/y
int i2=mid+1; e|+U7=CK
for(int cur=l;cur<=r;cur++){ ;Aiuy{<
if(i1==mid+1) ;RW!l pGjP
data[cur]=temp[i2++]; Mi9A%ZmP
else if(i2>r) Q <EFd
data[cur]=temp[i1++]; (F]f{8
else if(temp[i1] data[cur]=temp[i1++]; /s(/6~D|
else FZz\zp
data[cur]=temp[i2++]; )MLOYX
} qr$=oCqa
} s
d>&6R^
kg7oH.0E
} \&]'GsfF
cUaLv1:HI
改进后的归并排序: R~CQ=KQ.
{*As-Y:'F
package org.rut.util.algorithm.support; Gk*Mx6|N
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import org.rut.util.algorithm.SortUtil; q*TH),)J
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/** @P6K`'.0
* @author treeroot HQK%Y2S
* @since 2006-2-2 gAC}
* @version 1.0 gzvEy^X
*/ \i}n1Qd
public class ImprovedMergeSort implements SortUtil.Sort { P49lE
~!&WK,k6
private static final int THRESHOLD = 10; ]]Ypi=<'
aG8}R~wH&
/* lz
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* (non-Javadoc) $:s1x\ol
* tfvX0J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bQow,vf
*/ ?3kfhR
public void sort(int[] data) { U5z^R>k
int[] temp=new int[data.length]; y. @7aT5
mergeSort(data,temp,0,data.length-1); (EIdw\
} {7[^L1
"2)<'4q5)
private void mergeSort(int[] data, int[] temp, int l, int r) { RtGETiA\b
int i, j, k; ]y@9z b
int mid = (l + r) / 2; L{ ?& .iA
if (l == r) kYl$V=
return; mfQQ<Q@
if ((mid - l) >= THRESHOLD) 2I(0EBW
mergeSort(data, temp, l, mid); ;#I(ucB<
else -RVwPY
insertSort(data, l, mid - l + 1); "2}04b|"
if ((r - mid) > THRESHOLD) .6+j&{WNo!
mergeSort(data, temp, mid + 1, r); 1`r
4
else 9}iEEI
insertSort(data, mid + 1, r - mid); Aga2 I#1r
K_bF)6"
for (i = l; i <= mid; i++) { D)8&v`LS
temp = data; jn>3(GRGC$
} E< "aUnI
for (j = 1; j <= r - mid; j++) { k'&BAC.K,
temp[r - j + 1] = data[j + mid]; oqB(l[%z2
} JGX E{FT
int a = temp[l]; _W/s=pCh
int b = temp[r]; fySzZ
for (i = l, j = r, k = l; k <= r; k++) { hf^,
if (a < b) { Y[i>
data[k] = temp[i++]; di>"\On-
a = temp; |3/=dG
} else {
YH&`+ +
data[k] = temp[j--]; f%` =>l
b = temp[j]; b/5?)!I
} j1*'yvGM
} k q8:h
} $IA(QC_]AO
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/** 2HoTj|
* @param data tm @&f
* @param l L
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* @param i [0El z@.C
*/ 6C4c.+S
private void insertSort(int[] data, int start, int len) { a&6 3[p.<}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); AIR,XlD
} {3@f(H m
} v{$X2z_$w
} /qed_w.p
} 57* z0<
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堆排序: wUW^
O
rS\j9@=Y4
package org.rut.util.algorithm.support; fPZt*A__
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import org.rut.util.algorithm.SortUtil; ' 7+x,TszI
t*m04* }
/** CeSr~Ikg|
* @author treeroot ynvU$}w ~'
* @since 2006-2-2 !'w h hi
* @version 1.0 D)U
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*/ g&!UaJ[#9
public class HeapSort implements SortUtil.Sort{ Hdw;=]-
C=IT`iom1C
/* (non-Javadoc) &YGd!Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;e415T
*/ 9+nB;vA
public void sort(int[] data) { i#Io;
MaxHeap h=new MaxHeap(); m~'!
h.init(data); Yrs7F.Y"
for(int i=0;i h.remove(); NQz*P.q
System.arraycopy(h.queue,1,data,0,data.length); JGOry \
} @X+m,u
%OB:lAeJ
private static class MaxHeap{ N4I`6uDgD
d00#;R
void init(int[] data){ uf]SPG#/D
this.queue=new int[data.length+1]; <k!M+}a 9V
for(int i=0;i queue[++size]=data; #<s6L"Z-
fixUp(size); 2-728
} W@`2+}
} {^=T&aCYdS
"s]r"(MX
private int size=0; T\I}s"d
XLb
lVi@
private int[] queue; g>-pC a
3O7]~5 j1
public int get() { pYf57u
return queue[1]; Q)c3=.[>
} 3u#bx1
U$v|c%6
public void remove() { `-W.uOZ0
SortUtil.swap(queue,1,size--); SK
[1h3d
fixDown(1); `)%z k W
} :+NZW9_
file://fixdown S"'0lS
private void fixDown(int k) { @&?E3?5ll
int j; `|coA2$rw
while ((j = k << 1) <= size) { O 7RIcU
if (j < size %26amp;%26amp; queue[j] j++; ,%"!8T
if (queue[k]>queue[j]) file://不用交换 h?R{5?RxK
break; J!Er%QUR
SortUtil.swap(queue,j,k); G%^jgr)
k = j; *o.f<OwOz
} SQ8xfD*
} \ne1Xu:hM
private void fixUp(int k) { g%Bh-O9\
while (k > 1) { /N= }wC
int j = k >> 1; fn.KZ
if (queue[j]>queue[k]) yJQ>u
break; OL]P(HRm]~
SortUtil.swap(queue,j,k); EQI9J#;+
k = j; 01=nS?
} M.fAFL
} 'yxN1JF
;\j7jz^uC
} zU7co.G
WX
.Ax$fT
} Zc 9@G-
K&ZN!VN/p
SortUtil: } I>6 8dS[
!C\$=\$
package org.rut.util.algorithm; 9d&@;&al
^POHQQ
import org.rut.util.algorithm.support.BubbleSort; ypU-/}Cf,
import org.rut.util.algorithm.support.HeapSort; dUN{@a\R0
import org.rut.util.algorithm.support.ImprovedMergeSort; '
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import org.rut.util.algorithm.support.ImprovedQuickSort; 4>
k"$l/:
import org.rut.util.algorithm.support.InsertSort; q9Zp8&<EqH
import org.rut.util.algorithm.support.MergeSort; T_R2BBT
v
import org.rut.util.algorithm.support.QuickSort; F!7dGa$
import org.rut.util.algorithm.support.SelectionSort; `eZzYe(N
import org.rut.util.algorithm.support.ShellSort; YTpiOPf
PAng(tubl
/** 8tfM,.]_i
* @author treeroot '41'Gn
* @since 2006-2-2 OQW%nF9~
* @version 1.0 Kzw br?&z
*/ a+'k#m
public class SortUtil { n*A?>NV
public final static int INSERT = 1; 37apOK4+
public final static int BUBBLE = 2; "I)/|x\G*
public final static int SELECTION = 3; V>Dqw!
public final static int SHELL = 4; ^h\(j*/#X
public final static int QUICK = 5; #[f]-c(!
public final static int IMPROVED_QUICK = 6; :eIi^K z[
public final static int MERGE = 7; Z8C~o)n9
public final static int IMPROVED_MERGE = 8; 7Tb[sc'
public final static int HEAP = 9; tGE=!qk
Cj%n?-
public static void sort(int[] data) { ;w/@_!~
sort(data, IMPROVED_QUICK); >?<S(
} Tp46K\}Uf
private static String[] name={ T@wgWE<0y_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CvhVV"n
}; 'oKen!?A
u9nJ;:
private static Sort[] impl=new Sort[]{ ai%*s&0/Y
new InsertSort(), . ;rE4B
new BubbleSort(), o6tPQ (Vi
new SelectionSort(), d1P|v(
`S9
new ShellSort(), Qb%o%z?hee
new QuickSort(), (+yH
new ImprovedQuickSort(), 3rVfBz
new MergeSort(), (E;+E\E
new ImprovedMergeSort(), Ez8k.]q u
new HeapSort() @C-03`JWuK
}; c@3mfc{
=yF]#>Ah
public static String toString(int algorithm){ :V3z`}Rl
return name[algorithm-1]; za%gD
} :)Pj()Os|
N0DzFXp
public static void sort(int[] data, int algorithm) { :KmnwYm
impl[algorithm-1].sort(data); &(7=NAQsE
} dI%?uk
+0}z3T1L
public static interface Sort { SR$ 'JGfp
public void sort(int[] data); p}oGhO&=
} /4*Y#IpZ
2FR+Z3&z
public static void swap(int[] data, int i, int j) { !4-4i
int temp = data; X+1Mv
data = data[j]; d-3.7nJ:
data[j] = temp; /#WvC;B
} V7b;qC'
} Rk,'ujc