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[JAVA]用Java实现的各种排序

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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。 O!3MXmaO  
插入排序: Yb~[XS |p  
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package org.rut.util.algorithm.support; mihR *8p  
|#6B<'e'  
import org.rut.util.algorithm.SortUtil; >A+0"5+_p  
/** U|Du9_0  
* @author treeroot tY1M7B^~  
* @since 2006-2-2 IC1oW)  
* @version 1.0 Gs2| #*6  
*/ nO'lN<L  
public class InsertSort implements SortUtil.Sort{ s Y^#I  
f:=y)+@1My  
/* (non-Javadoc) 6eUM[C.  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {GTOHJ2  
*/ E>bK-jG  
public void sort(int[] data) { bpQ5B'9  
int temp; r&u&$ "c  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); }bW"Z2^nB  
} !c;Z<@  
} #LGAvFA*_F  
} fO;#;p.  
q13bV  
} fG+/p 0sJ?  
|Sne\N>%  
冒泡排序: gCVgL]jj(  
y)s+/Teb  
package org.rut.util.algorithm.support; *~t&Ux#hj  
vy <(1\  
import org.rut.util.algorithm.SortUtil; <3[,bTIk  
Y [hTO.LF  
/** yBd#*3K1  
* @author treeroot U]aH4 N  
* @since 2006-2-2 K>"]*#aBv  
* @version 1.0 GW]b[l  
*/ }# ~DX!Sj  
public class BubbleSort implements SortUtil.Sort{ Fp_?1 y  
u~WE} VC  
/* (non-Javadoc) Ik4FVL8~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hzT,0<nw  
*/ 1Q&\y)@bT  
public void sort(int[] data) { k u@sQn  
int temp; doIcO,Q  
for(int i=0;i for(int j=data.length-1;j>i;j--){ oj|\NlR  
if(data[j] SortUtil.swap(data,j,j-1); .4jU G=  
} 6`ZHFem  
} XZ8#8Di8  
} q;W(;B  
} w:|BQ,  
lWVvAoe  
} 1ZUmMa1(  
Rl. YF+YH  
选择排序: *A2D}X3s  
(1t b  
package org.rut.util.algorithm.support; w^_[(9 `  
b5-WK;  
import org.rut.util.algorithm.SortUtil; -^Pn4y]A)  
k>2tC<  
/** =JqKdLH  
* @author treeroot 7j9X<8 *  
* @since 2006-2-2 _'W en  
* @version 1.0 J%Cn  
*/ @v#]+9F  
public class SelectionSort implements SortUtil.Sort { F%Xj'=  
{Q%"{h']  
/* 8lI'[Y?3.  
* (non-Javadoc) BI BBp=+  
* }m`+E+T4  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $CgJ+ua\8  
*/ a2'si}'3  
public void sort(int[] data) { MmZs|pXk  
int temp; d x/NY1  
for (int i = 0; i < data.length; i++) { yF~iVt  
int lowIndex = i; 6N6}3J5  
for (int j = data.length - 1; j > i; j--) {  QB/H  
if (data[j] < data[lowIndex]) { u?ALZxj?  
lowIndex = j; ?hz9]I/8  
} #@i1jZ  
} gcaXN6C  
SortUtil.swap(data,i,lowIndex); ckglDhC  
} ,%bG]5  
} Yv!r>\#0S  
e\9H'$1\  
} UBgheu  
Vb _W&Nwd  
Shell排序: L.%N   
m(B,a,g<  
package org.rut.util.algorithm.support; */T.]^  
L\CufAN  
import org.rut.util.algorithm.SortUtil; /^m3?q[a  
_o'3v=5T  
/** [K*>W[n  
* @author treeroot `4@_Y<  
* @since 2006-2-2 X-Yy1"6m1  
* @version 1.0 THFzC/~Q  
*/ b?=>)':f  
public class ShellSort implements SortUtil.Sort{ OdZLJt?g  
2I8 RO\zR  
/* (non-Javadoc) I3#h  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p+t79F.js  
*/ R*DQm  
public void sort(int[] data) { 3U_,4qf  
for(int i=data.length/2;i>2;i/=2){ B9Ha6kj  
for(int j=0;j insertSort(data,j,i); *c 0\<BI  
} i uNBw]  
} Ykt{]#  
insertSort(data,0,1); 5S;|U&f|  
} AP2BND9  
cAL*Md8+  
/** "TLY:V  
* @param data YFGQPg  
* @param j SWrt4G  
* @param i 5ree3 quh  
*/ VSxls  
private void insertSort(int[] data, int start, int inc) { cNd;qO0$  
int temp; 4X()D {uR  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ^2|G0d@.:  
} 0c pI2  
} k~ YZT 8  
} k=7+JI"J  
ZeL v!  
} h=1cD\^|qw  
NIzxSGk|  
快速排序: o:.6{+|N  
7[b]%i  
package org.rut.util.algorithm.support; f`[gRcZ-  
KBb{Z;%  
import org.rut.util.algorithm.SortUtil; .3tyNjsn\  
T##_?=22I  
/** -kv'C6gB  
* @author treeroot Me.t_)  
* @since 2006-2-2 +FYQ7UE  
* @version 1.0 ^T{ww=/v  
*/ ;)SWUXa;{  
public class QuickSort implements SortUtil.Sort{ Zl:Z31  
M.[A%_|P  
/* (non-Javadoc) r N.<S[  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P XH"%vVF  
*/ MV~-']2u  
public void sort(int[] data) { :'t+*{ff  
quickSort(data,0,data.length-1); W{{{c2 .  
} VkD8h+)  
private void quickSort(int[] data,int i,int j){ C4`u3S  
int pivotIndex=(i+j)/2; ,^>WC G  
file://swap q3~RK[OCq  
SortUtil.swap(data,pivotIndex,j); {e3XmVAI  
]t23qA@^2  
int k=partition(data,i-1,j,data[j]); z1WF@ Ej  
SortUtil.swap(data,k,j); Hf ]w  
if((k-i)>1) quickSort(data,i,k-1); {|jrYU.k~  
if((j-k)>1) quickSort(data,k+1,j); [xrM){ItW  
1\~-No  
} E2 5:e EXa  
/** RjOQSy3  
* @param data On^jHqLaE  
* @param i =LsW\.T6  
* @param j jW?siQO^  
* @return 4Y=sTXbFt  
*/ l$:.bwXXO  
private int partition(int[] data, int l, int r,int pivot) { XQH wu  
do{ #fb <\!iza  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 5GwXZ;(G  
SortUtil.swap(data,l,r); N?7vcN+-t)  
} gA&+<SK(  
while(l SortUtil.swap(data,l,r); z ]d^%>Ef  
return l; }`SXUM_sD`  
} .\W6XRw  
\Jcj4  
} E@f2hW2  
6*cY[R|q!  
改进后的快速排序: @ eQo  
|.s#m^"  
package org.rut.util.algorithm.support; TDMyZ!d  
f\Fk+)e@  
import org.rut.util.algorithm.SortUtil; !.(%"  
+&T;jad2  
/** EK-Qa<[|  
* @author treeroot `D#3  
* @since 2006-2-2 77:s=)   
* @version 1.0 Q]?Lg  
*/ wl*"Vagb  
public class ImprovedQuickSort implements SortUtil.Sort { $oJ)W@>  
x+L G4++  
private static int MAX_STACK_SIZE=4096; XyS|7#o  
private static int THRESHOLD=10; lF=l|.c  
/* (non-Javadoc) D>YbL0K>X~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jMT];%$[  
*/ icX$<lD  
public void sort(int[] data) { Sb9In_* 0  
int[] stack=new int[MAX_STACK_SIZE]; Ww }qK|D  
e^Ds|}{V  
int top=-1; NWGSUUa  
int pivot; /f:)I.FUm  
int pivotIndex,l,r; [~ Wiy3n  
Hko(@z  
stack[++top]=0; g;>M{)A  
stack[++top]=data.length-1; %o~w  
2WA =U]  
while(top>0){ D-/aS5wM  
int j=stack[top--]; Mohy;#8Wk  
int i=stack[top--]; wc-ll&0Z  
ql Uw;{;p  
pivotIndex=(i+j)/2; 6iozb~!Rr  
pivot=data[pivotIndex]; WF6'mg^^?  
sF/X#GG-  
SortUtil.swap(data,pivotIndex,j); GisI/Ir[  
"/EE$eU  
file://partition Lnk!zj  
l=i-1; +Rtz`V1d  
r=j; yxECK&&P0#  
do{ ) OqQz7'  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); NMSpi[dr  
SortUtil.swap(data,l,r);  9"@P.8_  
} O\5*p=v  
while(l SortUtil.swap(data,l,r); ]g>@r.Nc  
SortUtil.swap(data,l,j); %HRFH  
{(DD~~)D  
if((l-i)>THRESHOLD){ 3wS{@'  
stack[++top]=i; !  Z e  
stack[++top]=l-1; M!=WBw8Y]a  
} JJvf!]  
if((j-l)>THRESHOLD){ cU y,q]PO  
stack[++top]=l+1; cI)XXb4  
stack[++top]=j; A2` QlhZ  
} bb6 ~H  
m_%1I J  
} n 0X_m@  
file://new InsertSort().sort(data); s[yIvlHw`  
insertSort(data); u@`)u#  
} cx]O#b6B.  
/** ZKG S?z  
* @param data $z7[RLu0!  
*/ 9`8\<a'rU  
private void insertSort(int[] data) { +[ _)i9a  
int temp; 8F$b/Z  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); q\qV~G`  
} 23/!k}G"  
} vT<q zN  
} )shzJ9G  
O<R6^0B42  
} x M1>kbo|  
W|U!kqU  
归并排序: h(,SAY_  
lu^ c^p;  
package org.rut.util.algorithm.support; {&Kq/sRz  
dqMR<Nl&  
import org.rut.util.algorithm.SortUtil; q8:Z.<%8  
9T47U; _)  
/** GHHErXT\a  
* @author treeroot qYg4H|6  
* @since 2006-2-2 WgdL^PN(h  
* @version 1.0 9Z0(e!b4S  
*/ U~8.uldnF  
public class MergeSort implements SortUtil.Sort{ S9Fg0E+J  
w;.'>ORC  
/* (non-Javadoc) ZQvpkO7}M  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8#%p[TLj  
*/ $+IE`(Ckf  
public void sort(int[] data) { z8 bDBoD6  
int[] temp=new int[data.length]; l`2X'sw[/  
mergeSort(data,temp,0,data.length-1); I/bED~Z:a  
} 9=&e5Oq}  
QZBXI3%#s  
private void mergeSort(int[] data,int[] temp,int l,int r){ 5/Ng!bW  
int mid=(l+r)/2; PXGS5,  
if(l==r) return ; IMY?L  
mergeSort(data,temp,l,mid); d7A08l{  
mergeSort(data,temp,mid+1,r); gmfux b/  
for(int i=l;i<=r;i++){ \s2hep  
temp=data; -ob_]CKtJ~  
} i0uBb%GMT  
int i1=l; u93=>S  
int i2=mid+1; TB] %?L:  
for(int cur=l;cur<=r;cur++){ d\`A ^  
if(i1==mid+1) 0lNVQxG  
data[cur]=temp[i2++]; &nk6_{6 c  
else if(i2>r) B$k<F8!%  
data[cur]=temp[i1++]; ND\&#  
else if(temp[i1] data[cur]=temp[i1++]; P>=~\v nN#  
else =R#K` H66j  
data[cur]=temp[i2++]; MN2#  
} cL&V2I5O  
} Q5e ,[1  
%t0Fx  
} omM*h{z$$  
buo_H@@p{s  
改进后的归并排序: yhe$A<Rl=  
.~V0>r~my  
package org.rut.util.algorithm.support; :X[(ymWNE  
8uoFV=bj\  
import org.rut.util.algorithm.SortUtil; b r)oSw  
%3'4QmpR  
/** C #ng`7 q  
* @author treeroot S .rT5A[  
* @since 2006-2-2 PY: l  
* @version 1.0 KO(+%>^R  
*/ XM3N>OR.  
public class ImprovedMergeSort implements SortUtil.Sort { 4NL Tt K  
"GP!]3t  
private static final int THRESHOLD = 10; irCS}Dbw  
CjM+%l0MW  
/* AiSO|!<.N  
* (non-Javadoc) lhTjG,U=  
* ll {jE  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e#K =SV!H  
*/ vV1F|  
public void sort(int[] data) { p5^,3&  
int[] temp=new int[data.length]; h&J6  
mergeSort(data,temp,0,data.length-1); ^_JD 7-g  
} ;Jt*s  
3ik  
private void mergeSort(int[] data, int[] temp, int l, int r) { )J8dm'wH92  
int i, j, k; i8I%}8  
int mid = (l + r) / 2; ;HM& ":7  
if (l == r) IC+Z C   
return; KzZ! CB\  
if ((mid - l) >= THRESHOLD) >2`)S{pBD  
mergeSort(data, temp, l, mid); !*.mcIQT  
else Zo`'xg  
insertSort(data, l, mid - l + 1); &R/)#NAp  
if ((r - mid) > THRESHOLD) w4pU^&O  
mergeSort(data, temp, mid + 1, r); I!.o& dk  
else Rd;k>e  
insertSort(data, mid + 1, r - mid); 7]Y Le+Ds  
<3z]d?u  
for (i = l; i <= mid; i++) { !<]%V]5[_  
temp = data; !!_K|}QOE  
} ?yzhk7j7  
for (j = 1; j <= r - mid; j++) { ,St#/tu  
temp[r - j + 1] = data[j + mid]; b9[;qqq@'  
} qSj2=dlW  
int a = temp[l]; _*6nTSL  
int b = temp[r]; r_T\%  
for (i = l, j = r, k = l; k <= r; k++) { }% JLwN  
if (a < b) { T F&xiL^  
data[k] = temp[i++]; Z}.N4 /  
a = temp; ,"  
} else { jdQ`Y+BC  
data[k] = temp[j--]; -,Cx|Nl  
b = temp[j]; 9_[TYzpB!  
} }6.R.*Imz  
} X>2_G ol!  
} B;[{7J]  
?ltTJ(Po  
/** bLGgu#  
* @param data ex7zg!  
* @param l l]inG^s  
* @param i R9D< lX0%  
*/ JPS22i)P  
private void insertSort(int[] data, int start, int len) { q5?g/-_0[  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %TdZ_  
} MVz=:2)J2  
} MhNzmI&`  
} %5RY Ea  
} U .hV1  
NY\q  
堆排序: p!>FPS  
V(1Ldl'a  
package org.rut.util.algorithm.support; U 9TEC)  
Lv+lLK  
import org.rut.util.algorithm.SortUtil; k_#ra7zP  
{<iIL3\mC  
/** :j9{n ,F  
* @author treeroot $'dJ+@  
* @since 2006-2-2 :\L{S  
* @version 1.0 VdQ}G!d  
*/ +4f>njARIb  
public class HeapSort implements SortUtil.Sort{ wxVf6`  
EcrM`E#kaZ  
/* (non-Javadoc) V"(S<o  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $q]((@i.  
*/ .2/(G{}U  
public void sort(int[] data) { -fuSCj  
MaxHeap h=new MaxHeap(); :pcKww|V  
h.init(data); /E$"\md  
for(int i=0;i h.remove(); jFpXTy[>  
System.arraycopy(h.queue,1,data,0,data.length); 6UR.,*f=  
} dG}fpQ3&  
X{\>TOk   
private static class MaxHeap{ +[8s9{1{C  
lBh|+K N  
void init(int[] data){ U|6ME%xm  
this.queue=new int[data.length+1]; Sx+.<]t2A  
for(int i=0;i queue[++size]=data; L.>tJ.ID  
fixUp(size); )`yxJ;O@$  
} *DObtS_ 6  
} P!'Sx;C^f  
23@e?A=C  
private int size=0; KB <n-'  
Bx0^?>  
private int[] queue; qyGVyi3  
Kf2*|ZHj  
public int get() { dQ@ e+u5  
return queue[1]; Dg%zNi2GS  
} 1uz9zhG><  
cW;to Q!P  
public void remove() { /=>z|?z3  
SortUtil.swap(queue,1,size--); :M9'wg  
fixDown(1); n^'ip{  
} UOSa`TZbZ  
file://fixdown t Krr5SRb  
private void fixDown(int k) { #qT97NQ  
int j; ]Gm,sp.x  
while ((j = k << 1) <= size) { }"wWSPD  
if (j < size %26amp;%26amp; queue[j] j++; B5*{85p(u  
if (queue[k]>queue[j]) file://不用交换 +u' ?VBv  
break; U0t/(Jyg  
SortUtil.swap(queue,j,k); ?~uTbNR  
k = j; B2:6=8<  
} 1i4KZ"A5+  
} / *xP`'T  
private void fixUp(int k) { .9+"rK}u  
while (k > 1) { k-xh-&  
int j = k >> 1; RoSh|$JF  
if (queue[j]>queue[k]) \NKf$"x}  
break; 1s8v E f  
SortUtil.swap(queue,j,k); 5t#+UR  
k = j; su/l'p'  
} )Y}t~ Zfx  
} Gp'rN}i^  
:,%~rR  
} 7kx)/Rw\B  
cOcF VPQ  
} ;0O3b  
^ '!]|^  
SortUtil: .x5Y fe  
.pNWpWL.  
package org.rut.util.algorithm; )dgXS//Y  
A-1Wn^,> *  
import org.rut.util.algorithm.support.BubbleSort; F2]v]]F!  
import org.rut.util.algorithm.support.HeapSort; y[Zl,v7  
import org.rut.util.algorithm.support.ImprovedMergeSort; lrB@n?hk  
import org.rut.util.algorithm.support.ImprovedQuickSort; /9NQ u  
import org.rut.util.algorithm.support.InsertSort; I8@NQ=UV0  
import org.rut.util.algorithm.support.MergeSort; &1YqPk  
import org.rut.util.algorithm.support.QuickSort; *Uie{^p?  
import org.rut.util.algorithm.support.SelectionSort; <:0649ZB  
import org.rut.util.algorithm.support.ShellSort; U:m[* }+<  
fs+l  
/** (xpj?zlmM  
* @author treeroot ;E>5<[aa  
* @since 2006-2-2 wx n D3  
* @version 1.0 ^5j|   
*/ mv|eEz)r  
public class SortUtil { W!8g.r4u+,  
public final static int INSERT = 1; }GJIM|7^  
public final static int BUBBLE = 2; N ncur]  
public final static int SELECTION = 3; B~QX{  
public final static int SHELL = 4; 7YsBwo  
public final static int QUICK = 5; >Lp^QP1gU  
public final static int IMPROVED_QUICK = 6; %l%5Q;t  
public final static int MERGE = 7; -hj@^Auf  
public final static int IMPROVED_MERGE = 8; #Mw|h^ Wm  
public final static int HEAP = 9; \c3zK|^  
xr+K: bw  
public static void sort(int[] data) { |E-/b6G  
sort(data, IMPROVED_QUICK); } NW^?37  
} NH$%g\GPs  
private static String[] name={ )kR~|Yn<-  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _+YCwg  
}; ,IoPK!5xy  
T{3C3EE?]  
private static Sort[] impl=new Sort[]{ 5A/8G}'XZ  
new InsertSort(), EKoAIC*?p  
new BubbleSort(), ac"Pn? q  
new SelectionSort(), {.pR$]6B"+  
new ShellSort(), pV{MW#e  
new QuickSort(), %5 V!Fdb  
new ImprovedQuickSort(), Jaz|b`KDj  
new MergeSort(), Wm$( b2t  
new ImprovedMergeSort(), N|K,{ p^li  
new HeapSort() Q1J./C}  
}; eWzD'3h^  
H7n5k,  
public static String toString(int algorithm){ eKi/Mt  
return name[algorithm-1]; / 1 lIV_Z  
} s `fIeP  
u,e'5,`N  
public static void sort(int[] data, int algorithm) { {$z)7s  
impl[algorithm-1].sort(data); Q3> 3!FAO  
} </F@ 5*  
:W(3<D7\  
public static interface Sort { LWE[]1=  
public void sort(int[] data); nlJ~Q_E(  
} o:B?gDM  
. [DCL  
public static void swap(int[] data, int i, int j) { /3->TS  
int temp = data; _yY(&(]#  
data = data[j]; T- ID{i  
data[j] = temp; ^_ <jg0V  
} #mwV66'H  
} R2WEPMH%  
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