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。 {.oz^~zs]g
插入排序: o% Q7 el$f
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package org.rut.util.algorithm.support; !otseI!!/
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import org.rut.util.algorithm.SortUtil; M*n94L=Sg&
/** ;\}dQsX
* @author treeroot 6@lZVM)E
* @since 2006-2-2 VTR4uT-
* @version 1.0 v(0ujfSR0
*/ ;yqHt!N
public class InsertSort implements SortUtil.Sort{ cg^~P-i@*
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/* (non-Javadoc) .= ~2"P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
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*/
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public void sort(int[] data) { 0J[B3JO@M
int temp; H/`@6, j
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); A-m IWTa
} 3%r/w7Fc
} @Oz3A<M
} P=}dR&gk'
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} =?4[:#Rh
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冒泡排序: U.Vn|s(`z
xX<T5Ls
package org.rut.util.algorithm.support; #s(ob `0|
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import org.rut.util.algorithm.SortUtil; O0r vr$.
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/** QsPg4y3?D
* @author treeroot \s)$[pAF
* @since 2006-2-2 r2tE!gMC
* @version 1.0 j0oto6z~b
*/ 8[,R4@
public class BubbleSort implements SortUtil.Sort{ 9a@S^B>
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/* (non-Javadoc) \2~\c#-k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (bsywM
*/ yz,_\{}
public void sort(int[] data) { L;g2ZoqIr0
int temp; ^-Arfm%dn
for(int i=0;i for(int j=data.length-1;j>i;j--){ #a@ jt
if(data[j] SortUtil.swap(data,j,j-1); W,,3@:
} 0iC5,
} 1,zc8 >M
} -#;ZZ\fdj
} L$"x*2[A
% &H^UxC
} BZTj>yd
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选择排序: p;7wH\c
%AqI'ObC
package org.rut.util.algorithm.support; 7s%1?$B
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import org.rut.util.algorithm.SortUtil; ~mvv
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/** [vuikJP>1k
* @author treeroot _qOynW
* @since 2006-2-2 H/ e jO_{
* @version 1.0 }jce5E
*/
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public class SelectionSort implements SortUtil.Sort { \I6F;G6
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/* ldU ><xc2
* (non-Javadoc) ~#so4<A`3
* QTF1~A\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c*axw%Us
*/ h7.jWJTo
public void sort(int[] data) { u f<%!=e
int temp; W:j9 KhvT
for (int i = 0; i < data.length; i++) { F#Pn]
int lowIndex = i; ">8oF.A^
for (int j = data.length - 1; j > i; j--) { Z/GSR$@lI
if (data[j] < data[lowIndex]) { dEkS T[Y3
lowIndex = j; Ed;!A(64r
} zA|lbJz=GY
} 9' H\-
SortUtil.swap(data,i,lowIndex); W:WRG8(F
} 3 %r*~#nz
} 45Zh8 k
o&k,aCQC
} *yZta:(w-W
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Shell排序: 1PWi~1q{Q
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package org.rut.util.algorithm.support; Yc)Dx3
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import org.rut.util.algorithm.SortUtil; mo4F\$2N
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/** zcOm"-E-
* @author treeroot I:al[V2g
* @since 2006-2-2 .bV^u
* @version 1.0 *GhV1# <
*/ 9P#kV@%(0c
public class ShellSort implements SortUtil.Sort{ m4~~ q[t
R;U4a2~
/* (non-Javadoc) 2Z"\%ZD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F!?f|z,/
*/ N48X[Q*
public void sort(int[] data) { ox.kL
for(int i=data.length/2;i>2;i/=2){ K'E)?NW69
for(int j=0;j insertSort(data,j,i); EN}4-P/5
} G:|]w,^i
} 8WQc8
insertSort(data,0,1); pfl^GgP#
} XfIsf9
#{k+^7aQ
/** ?mVSc/
* @param data u]9 #d^%V
* @param j NYxL7 :9
* @param i 8U]mr+
*/ 09Q5gal
private void insertSort(int[] data, int start, int inc) { nemC-4}
int temp; A 3q#,%
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); !iX/Ni:
} \|]+sQ WQ
} #+h#b%8
} Mbly-l{|
D#Mz#\4o
} <O-R
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快速排序: j,i)ecZ>
.UN?Ak*R
package org.rut.util.algorithm.support; Gp?pSI,b.t
B'y)bY'_dS
import org.rut.util.algorithm.SortUtil; :UKc:JVNM
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/** ZRr.kN+F
* @author treeroot ]haQ#e}WH
* @since 2006-2-2 '['x'G50
* @version 1.0 g>b{hkIXg
*/ , a2=OV
public class QuickSort implements SortUtil.Sort{ "N,@J-]/k
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/* (non-Javadoc) o=lZl_5/u;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v}!^RW'X
*/ = 'e_9b\K
public void sort(int[] data) { ;kG"m7-/
quickSort(data,0,data.length-1); <
jX5}@`z
} *xx)j:Sc2
private void quickSort(int[] data,int i,int j){ r0\C2g_X
int pivotIndex=(i+j)/2; {8;}y[R
file://swap B1Z;
SortUtil.swap(data,pivotIndex,j); [ 'B u
]h`d>#Hw!
int k=partition(data,i-1,j,data[j]); 1p-<F3;
SortUtil.swap(data,k,j); qckRX+P`
if((k-i)>1) quickSort(data,i,k-1); (II#9n)
if((j-k)>1) quickSort(data,k+1,j); Z;dR:|%)
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} k
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/** #>z !ns
* @param data \mt Y_O
* @param i `Xi)';p
* @param j O2lM;="
* @return \ZSq ZDq
*/ :"i2`y;u
private int partition(int[] data, int l, int r,int pivot) { i8*(J-M
do{ \2Q#'
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); R=iwp%c(
SortUtil.swap(data,l,r); ?2gXF0+~Y2
} r. rzU
while(l SortUtil.swap(data,l,r); tp\d:4~R
return l; hfvC-f97L
} au+:-Khm
]%G#x
} [KW)z#`*
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改进后的快速排序: cw_B^f8^
x%dVD
package org.rut.util.algorithm.support; eQfXUpk3@I
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c
import org.rut.util.algorithm.SortUtil; LF:~&
m
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/** [xdVuL;N
* @author treeroot +mO/9m
* @since 2006-2-2 M@pF[J/
* @version 1.0 "SC]G22
*/ 7PO]\X^(zE
public class ImprovedQuickSort implements SortUtil.Sort { <c,iu{:
jS#YqVuN
private static int MAX_STACK_SIZE=4096; bc& 5*?
private static int THRESHOLD=10; W:8{}Iu<
/* (non-Javadoc) (r1"!~d@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?'tFTh
*/ zP$"6~.
public void sort(int[] data) { NR^3
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int[] stack=new int[MAX_STACK_SIZE]; F*4G@)
po*r14f
int top=-1; B+c,3@)x
int pivot; =,s5>2
int pivotIndex,l,r; c11;(
raMtTL+
stack[++top]=0; 5m>f1`4JS
stack[++top]=data.length-1; t<^7s9r;I
3)(uC+?[
while(top>0){ vhU#<59a1
int j=stack[top--]; H.tfn>N|
int i=stack[top--]; 0^d<@\
X9&>.?r
pivotIndex=(i+j)/2; Z3X9-_g
pivot=data[pivotIndex]; [a#*%H{OC
lvR>%I0`*
SortUtil.swap(data,pivotIndex,j); rF/<}ye/4M
&mba{O
file://partition Ud#xgs'
l=i-1; 1b2xWzpG
r=j; pT:6A[&
do{ N=@8~{V.
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 3Z}KRsp3
SortUtil.swap(data,l,r); PoRP]Q*n
} 4`?WdCW8
while(l SortUtil.swap(data,l,r); @~i :8
SortUtil.swap(data,l,j); +a+DiD>./
v#5hK<9
if((l-i)>THRESHOLD){ 8'Q&FW3"
stack[++top]=i; ,jy9\n*<t9
stack[++top]=l-1; Q_k'7Z\g$
} Z v 7}C
if((j-l)>THRESHOLD){ _6aI>b#yL
stack[++top]=l+1; ?nM]eUAP
stack[++top]=j; b>& 3XDz
} /~/nhKm
6""i<oR
} :;&3"-
file://new InsertSort().sort(data); 7lzmAih
insertSort(data); @Fb
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} zRm@ |IT
/** -_>E8PhM
* @param data tYhNr
*/ ?{OU%usQwE
private void insertSort(int[] data) { T>5N$i
int temp; Et&PzDvU
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Ol8Yf.e_
} LiEDTXRz
} W;F=7[h
} CI|#,^
@3?dI@i(
} XU`vs`/
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归并排序: ,,h>_IA
h0-CTPQ7A
package org.rut.util.algorithm.support; 'pT8S
k!g%vx
import org.rut.util.algorithm.SortUtil; C]krJse@
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/** K6nNrd}p:
* @author treeroot \IOF 9)F
* @since 2006-2-2 4CxU
eq
* @version 1.0 DV!0zzJ
*/ #\6k_toZ
public class MergeSort implements SortUtil.Sort{ yONX?cS
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/* (non-Javadoc) 58PL@H~@0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yDi'@Z9R?
*/ Co:Rg@i(F
public void sort(int[] data) { r<$"T
int[] temp=new int[data.length]; ;4*mUD6
mergeSort(data,temp,0,data.length-1); lt{"N'Gw6
} S\@U3|Q5
xHlO~:Lc
private void mergeSort(int[] data,int[] temp,int l,int r){ p7,dl*'
int mid=(l+r)/2; q)RTy|NJ^
if(l==r) return ; [XD3}'Aa
mergeSort(data,temp,l,mid); *zv*T"&ZP
mergeSort(data,temp,mid+1,r); 6KX/Yj~B
for(int i=l;i<=r;i++){ +
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temp=data; Rab7Y,AA
} JiX-t\V ~
int i1=l; q =26($
int i2=mid+1; U)_x(B3d/
for(int cur=l;cur<=r;cur++){ 3Zm;:v4y
if(i1==mid+1) 88zK)k{
data[cur]=temp[i2++]; E> YE3-]
else if(i2>r) Nkk+*(Z
data[cur]=temp[i1++]; %p^`,b}
else if(temp[i1] data[cur]=temp[i1++]; j"vL$h
else (l)r.Vj
data[cur]=temp[i2++]; Jwbb>mB!
} 1sXVuto
} T{*!.+E
W"5VqN6v
} GO6uQ};
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改进后的归并排序: ^7Z.~A y
9@YhAj
package org.rut.util.algorithm.support; xepp."O
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import org.rut.util.algorithm.SortUtil; -K0!wrKC
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/** P5Pb2|\*
* @author treeroot
R7Z!
* @since 2006-2-2 piAFxS<6
* @version 1.0 v.>95|8
*/ X>Y>1fI.
public class ImprovedMergeSort implements SortUtil.Sort { ov|pXi<e
WCg&*
private static final int THRESHOLD = 10; knRs{1}Pw{
^x}k1F3
/* B?;P:!/1
* (non-Javadoc) W9jxw4)
* rf
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !4T7@V`G
*/ |GP1[Q{
public void sort(int[] data) { #M[%JTTn
int[] temp=new int[data.length]; }i9VV+L#1
mergeSort(data,temp,0,data.length-1); 32K
} 9@ :QBe3]
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private void mergeSort(int[] data, int[] temp, int l, int r) { #9q
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int i, j, k; <!PbD
int mid = (l + r) / 2; p ^ )iC&*0
if (l == r) DP!~WkU~
return; h:<?)g~U
if ((mid - l) >= THRESHOLD) 'A'[N :i
mergeSort(data, temp, l, mid); ZP"Xn/L
else qyR}|<F8*
insertSort(data, l, mid - l + 1); J|DY
/v
if ((r - mid) > THRESHOLD) _k Utj(re
mergeSort(data, temp, mid + 1, r); t:tIzFNv
else \T^ptj(0
insertSort(data, mid + 1, r - mid); vFi+ExBU
fD2)/5j1
for (i = l; i <= mid; i++) { T!t9`I0Zz
temp = data; dEPLkv
} x+W,P
for (j = 1; j <= r - mid; j++) { &LHS<Nv^:
temp[r - j + 1] = data[j + mid]; /vw$3,*z
} e9rgJJ
int a = temp[l]; }k_'a^;C1
int b = temp[r]; ^NFL3v8
for (i = l, j = r, k = l; k <= r; k++) { {,e-;2q
if (a < b) { VH<-||X/4
data[k] = temp[i++]; .c\iKc#
a = temp; MD[;Ha
} else { nYy+5u]FG
data[k] = temp[j--]; 8l
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b = temp[j]; 0uJ??4N9
} :} D TK
} 4Xe8j55
} iB5'mb*
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/** m[Cp
G=32B
* @param data #2?3B
* @param l \ 9#X]H
* @param i gh.+}8="
*/ .:B;%*
private void insertSort(int[] data, int start, int len) { NPLJ*uHH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TECp!`)j"
} |eP5iy wg
} FR6PY
} oe[f2?-
} :O]US)VSj
QQ./!
堆排序: oh,29Gg
YGOhUT |
package org.rut.util.algorithm.support; %(:{TR
o8N,mGj}
import org.rut.util.algorithm.SortUtil; x,TnYqT^
B9S@G{`
/** 'm.+ S8
* @author treeroot -b=Aj8h
* @since 2006-2-2 G@scz!Nt
* @version 1.0 FM<`\d'
*/ ?{wD%58^oG
public class HeapSort implements SortUtil.Sort{ ?vmoRX
;e6-*
/* (non-Javadoc) __`6 W1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pdk#"H-j
*/ k;jXVa
public void sort(int[] data) { Qn)AS1pL+
MaxHeap h=new MaxHeap(); &A~hM[-
h.init(data); hY|-l%2f
for(int i=0;i h.remove(); $Ao'mT
System.arraycopy(h.queue,1,data,0,data.length); *Nur>11D
} ,n&Lp
\W7pSV-U
private static class MaxHeap{ t@q==VHF
o&>aYlXd
void init(int[] data){ 06[HE7
this.queue=new int[data.length+1]; ^m -w@0^z
for(int i=0;i queue[++size]=data; 'Ej+Jczzpp
fixUp(size); 3|bbJ6*.<
} bRK\Tua
6
} S%jFH4#
5 TLE%#G@+
private int size=0; iKG,"
xMFEeSzl>S
private int[] queue; sCE%./h]
g1) ZjABV
public int get() { ~%@1-
return queue[1]; FA{(gib@9
} $.zd,}l@L
D&G^|: G
public void remove() { \Yh*ywwP#
SortUtil.swap(queue,1,size--); |g1Pr9{wy
fixDown(1); I/go$@E"
} p;~oIy\,
file://fixdown .pIO<ZAFT
private void fixDown(int k) { !1Nh`FN
int j; r(JP&
@
while ((j = k << 1) <= size) { '~zi~Q7M
if (j < size %26amp;%26amp; queue[j] j++; q2*1Gn9!j
if (queue[k]>queue[j]) file://不用交换 $J#Z`%B^y
break; ,@\z{}~v
SortUtil.swap(queue,j,k); e <+b?@}=B
k = j; }H|'W[Q.
} |qpFR)l
} D/+l$aBz
private void fixUp(int k) { y:Aha#<
while (k > 1) { k\IdKiOj!D
int j = k >> 1; 9*VL |
if (queue[j]>queue[k]) /q)
H0b
break; "G@(Cb*+T
SortUtil.swap(queue,j,k); "iUh.c=0F,
k = j; FIx|4[&>S
}
b(t8TR#-
} H\$uRA oo*
-FW^fGS+
} ~/rKKc
nK#%Od{GF
} B_>r|^Vh
g!^mewtd
SortUtil: _}
K3}}
P3v4!tR
package org.rut.util.algorithm; Gh352
3gtKD9RL:
import org.rut.util.algorithm.support.BubbleSort; -B #K}xL|x
import org.rut.util.algorithm.support.HeapSort; 1 ]ePU8
import org.rut.util.algorithm.support.ImprovedMergeSort; m$7C{Mr'
import org.rut.util.algorithm.support.ImprovedQuickSort; +'_ peT.8
import org.rut.util.algorithm.support.InsertSort; ,\N4tG1\
import org.rut.util.algorithm.support.MergeSort; MHJRBn{}
import org.rut.util.algorithm.support.QuickSort; O+]'*~a
import org.rut.util.algorithm.support.SelectionSort; 1C0'
Gf)3
import org.rut.util.algorithm.support.ShellSort; XW~a4If
LMuDda
/** ]~!CJ8d
* @author treeroot 5F#FC89Kk
* @since 2006-2-2 T[MDjhv'
* @version 1.0 tToP7q^
*/
\UZ7_\
public class SortUtil { @76I8r5l
public final static int INSERT = 1; zx@L sp
public final static int BUBBLE = 2; c/V0AKkS
8
public final static int SELECTION = 3; Rln\
public final static int SHELL = 4; syCT)}T6z
public final static int QUICK = 5; RwhKW?r+
public final static int IMPROVED_QUICK = 6; #/HZ[Vw
public final static int MERGE = 7; Q:Ma3El\
public final static int IMPROVED_MERGE = 8; _%#Uh#7P$
public final static int HEAP = 9; NMUF)ksjN
[3x},KM
public static void sort(int[] data) { i*@ZIw
sort(data, IMPROVED_QUICK); %,e,KcP'
} _7~q|
private static String[] name={ Ctx>#uN6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8,(--A
}; X"7x_yOZ
@!^Y_q
private static Sort[] impl=new Sort[]{ b1QHZY\g{
new InsertSort(), &P"1 3]^@
new BubbleSort(), Uyxn+j5
new SelectionSort(), ZrB(!L~7
new ShellSort(), >< VUly
new QuickSort(), _&S;*?K.
new ImprovedQuickSort(), Gte\=0Wr
new MergeSort(), iJ
@p:
new ImprovedMergeSort(), ,C|{_4
new HeapSort() z[K)0@8 6
}; /IF?|71,m
2/\I/QkTs
public static String toString(int algorithm){ Mi\-
9-
return name[algorithm-1]; YFW/
Fa\7
} j8aH*K-l{
h6n!"z8H
public static void sort(int[] data, int algorithm) { :#cJZ\YH
impl[algorithm-1].sort(data); ~+V$0Q;L
} i:jns>E
'H#0-V"=
public static interface Sort { &WOm[]Q4
public void sort(int[] data); +\?+cXSc
} mq(-L
c6AwO?x/
public static void swap(int[] data, int i, int j) { fzOh3FO+
int temp = data; mA"[x_
data = data[j]; \U##b~Z,g
data[j] = temp; Y#6LNI
} {?"X\5n0
} H )CoByaj