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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。 *='J>z.]  
插入排序: z~y=(T  
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package org.rut.util.algorithm.support; gS$?#!f  
L! DK2,  
import org.rut.util.algorithm.SortUtil; tj=l!  
/** wYIlp  
* @author treeroot {e'V^l.v  
* @since 2006-2-2 +ZK12D}  
* @version 1.0 lay)I11- >  
*/ ,2?Sua/LD  
public class InsertSort implements SortUtil.Sort{ \>@QJ  
c1L0#L/F6"  
/* (non-Javadoc) oz[: T3oE>  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `bx}!;{lx  
*/ z),@YJU"z  
public void sort(int[] data) { V'jvI  
int temp; 5fqQ;r  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); "hi)p9 _cR  
} HE0@`(mCpa  
} sp'f>F2]  
} d iGkwKj  
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}  8%W(",nd  
1 /dy@'  
冒泡排序: V$';B=M  
i r/-zp_  
package org.rut.util.algorithm.support; (^4V]N&  
zv}3Sl@  
import org.rut.util.algorithm.SortUtil; 3}lT"K  
F vt5vQ  
/** ;+-M+9"?O  
* @author treeroot y2:~_MD  
* @since 2006-2-2 "{F e  
* @version 1.0 Oj~4uT&"  
*/ m^M sp:T,  
public class BubbleSort implements SortUtil.Sort{ +#a_Y  
vv% o+r-t  
/* (non-Javadoc) c^ifHCt|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9yt)9f  
*/ RC>79e/u<  
public void sort(int[] data) { G&2`c\u{  
int temp; ;H;c Sn5uL  
for(int i=0;i for(int j=data.length-1;j>i;j--){ o,yP9~8\  
if(data[j] SortUtil.swap(data,j,j-1); 1o*eu&@  
} :497]c3#5C  
} pX~X{JTaL)  
} gJUawK  
} ndCHWhi  
*[SOz)  
} WMw^zq?hd@  
Nxd<#p  
选择排序: -{ M(1vV(=  
N& 683z  
package org.rut.util.algorithm.support; GjD^\d/  
i SD?y#  
import org.rut.util.algorithm.SortUtil; )J<VDO:_YA  
l k?@ =U~  
/** 7)U08"  
* @author treeroot (o5^@aDr  
* @since 2006-2-2 V0ig#?]  
* @version 1.0 / 8 0Q  
*/ 2Sg^SZFH+o  
public class SelectionSort implements SortUtil.Sort { ,/uVq G  
nhZ^`mP  
/* v3 q.,I_  
* (non-Javadoc) nS5g!GYY,k  
* f%2>pQTq@)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xh) h#p.  
*/ N!#0O.6  
public void sort(int[] data) { aI'MVKwMk  
int temp; TyG;BF|rwk  
for (int i = 0; i < data.length; i++) { Y_SB3 $])  
int lowIndex = i; }Jr!a M'  
for (int j = data.length - 1; j > i; j--) { 2#hfBJg@  
if (data[j] < data[lowIndex]) { k=D}i\F8  
lowIndex = j; ~As/cd>9  
} ,N`cH\  
} e*?@6E  
SortUtil.swap(data,i,lowIndex); eF%>5  
} cFF'ygJ/  
} +IkL=/';#  
)] C"r_  
} de<T5/  
]b6gZ<  
Shell排序: }S_#*N)i  
zY^QZceq"  
package org.rut.util.algorithm.support; t<DZW#  
(- QvlpZ  
import org.rut.util.algorithm.SortUtil; a58]#L~  
![l`@NH[U  
/** ]aN]Ha  
* @author treeroot Wn kIi,<  
* @since 2006-2-2 \]y /EOT  
* @version 1.0 KW 78J~u+  
*/ u4QBD5T"  
public class ShellSort implements SortUtil.Sort{ s-"oT=  
(l ]_0-Z  
/* (non-Javadoc) zS<idy F`  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8uD%  
*/ |iLf;8_:  
public void sort(int[] data) { ];63QJU  
for(int i=data.length/2;i>2;i/=2){ 'n dXM   
for(int j=0;j insertSort(data,j,i); Fd(o8z8Q  
} Q GoBugU  
} %%h0 H[5*  
insertSort(data,0,1); VTIRkC wl@  
} IL&;2%  
'i5,2vT0  
/** wk[4Qsk<  
* @param data hqwDlapTt  
* @param j ?Fp2W+M j  
* @param i p.@_3^#|  
*/ > %B7/l$  
private void insertSort(int[] data, int start, int inc) { =f\BAi  
int temp; E WNm }C9  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); :|PI_ $4H  
} ,GTIpPj  
} mDX UF~G[  
} 3Q\k!$zq  
*Al`QEW  
} Q@aDa8Z  
t[=teB v<  
快速排序: ul!e!^qwx  
^EF VjGM  
package org.rut.util.algorithm.support; fB"It~ p  
<]wQ;14;H  
import org.rut.util.algorithm.SortUtil; JuM4Njz|  
O;C C(  
/** }h=}!R'm   
* @author treeroot >Nr~7s  
* @since 2006-2-2 1P6!E*z\  
* @version 1.0 >uy(N  
*/ ;/s##7qf  
public class QuickSort implements SortUtil.Sort{ &wea]./B  
Q35jJQ$<`  
/* (non-Javadoc) #y>q)Ph  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $dkkgsw 7  
*/ ^w6~?'}  
public void sort(int[] data) { GEbm$\  
quickSort(data,0,data.length-1); m&{%6  
} v~`'!N8  
private void quickSort(int[] data,int i,int j){ Qt(4N!j  
int pivotIndex=(i+j)/2; =Eb4Iyz  
file://swap & T&>4I!'M  
SortUtil.swap(data,pivotIndex,j); g), t  
PGNH<E)  
int k=partition(data,i-1,j,data[j]); |:)ARH6l#  
SortUtil.swap(data,k,j); {T'M4y=)i  
if((k-i)>1) quickSort(data,i,k-1); _<m yM2z  
if((j-k)>1) quickSort(data,k+1,j); yDmx)^En  
cj@ar^=`K  
} /&!4oBna  
/** 8h'*[-]70u  
* @param data Q8?:L<A  
* @param i dSPye z  
* @param j 7AuzGA0y  
* @return 1%Su~Z"W>  
*/ gq~6 jf>  
private int partition(int[] data, int l, int r,int pivot) { 7I;A5f  
do{ w6<zPrA  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); F$nc9x[S  
SortUtil.swap(data,l,r); @0&KM|+  
} ?v@pB>NZ  
while(l SortUtil.swap(data,l,r); "Kc1@EX=  
return l; RElIWqgY  
} a*bAf'=  
Su*f`~G];  
} 3\E G  
'8V>:dy>  
改进后的快速排序: -W'T3_  
_]6n]koD,  
package org.rut.util.algorithm.support; AoFxho  
<BX'Owbs!O  
import org.rut.util.algorithm.SortUtil; ukwO%JAr  
`w K6B5>  
/** s~n@|m9k  
* @author treeroot ^udl&>  
* @since 2006-2-2 \Jm^XXgS  
* @version 1.0 :>3/*"vx?G  
*/ *EllE+M{n  
public class ImprovedQuickSort implements SortUtil.Sort { r31)Ed$  
~tB#Q6`nB  
private static int MAX_STACK_SIZE=4096; ~d"9?K^#  
private static int THRESHOLD=10; kmur={IR  
/* (non-Javadoc) @;`d\lQ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "U o~fJ  
*/ BVe c  
public void sort(int[] data) { Pt\GVWi_t  
int[] stack=new int[MAX_STACK_SIZE]; HMl M!Xk?  
H}PZJf_E  
int top=-1; nk.j7tu  
int pivot; FfpP<(4  
int pivotIndex,l,r; eiJ~1H X)  
{jOV8SVL  
stack[++top]=0; GFfZ TA  
stack[++top]=data.length-1; 3fd?xhWbN  
7;3;8Q FX  
while(top>0){ $9rQ w1#e  
int j=stack[top--]; D]NJ ^.X  
int i=stack[top--]; k4+Q$3"  
Ux+UcBKm-  
pivotIndex=(i+j)/2; 9 `T2  
pivot=data[pivotIndex]; qLa6c2o,  
yP0XA=,Y  
SortUtil.swap(data,pivotIndex,j); 0+3{fD/  
H J0Rcw%  
file://partition (Q F-=o  
l=i-1; A# Ne07d  
r=j; ?4H>1Wkb  
do{ ++Fv )KY@  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); /y[zOT6  
SortUtil.swap(data,l,r); , ePl>m:Z  
} L7PM am  
while(l SortUtil.swap(data,l,r); W_RN@O  
SortUtil.swap(data,l,j); ,lb >  
NT;cTa=;  
if((l-i)>THRESHOLD){ rt C:3fDy  
stack[++top]=i; f(E[jwy  
stack[++top]=l-1; &@fW6},iW  
} xFp?+a  
if((j-l)>THRESHOLD){  >^J  
stack[++top]=l+1; |H&&80I  
stack[++top]=j; ,u^%[ejH  
} @r3,|tkrz  
y7U?nP ')+  
} ?L+|b5RS  
file://new InsertSort().sort(data); <m0m8p"G  
insertSort(data); $8WeWmY  
} a+,zXJQYq  
/** :b"&Rc&s.  
* @param data Hh`HMa'q  
*/ >TG#  
private void insertSort(int[] data) { -fT}Nj\  
int temp; 7_CX6:  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 80"oT'ZFh  
} 3='Kii=LA  
} eZMfn$McJv  
} +O!4~k^  
8 Az|SJ<  
} {Y1&GO;  
9"cyZO  
归并排序: a Juv{  
@Zw[LIQ*  
package org.rut.util.algorithm.support; yII+#?D  
(7w95xI  
import org.rut.util.algorithm.SortUtil; K:54`UJ  
N4$ K {  
/** Ls/*&u  
* @author treeroot PasVfC@  
* @since 2006-2-2 C"R}_C|r)*  
* @version 1.0 'H-hp   
*/ YYF.0G}  
public class MergeSort implements SortUtil.Sort{ 0S&C[I o6  
c!]Q0ib6  
/* (non-Javadoc) g>;"Fymc'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q_z;kCHM  
*/ =h,J!0Y  
public void sort(int[] data) { ?yKG\tPhM  
int[] temp=new int[data.length]; hUe\sv!x?  
mergeSort(data,temp,0,data.length-1); ;!,I1{`  
} 3v>w$6  
ih(Al<IS  
private void mergeSort(int[] data,int[] temp,int l,int r){ +c' n,O~3  
int mid=(l+r)/2; !112u#V  
if(l==r) return ;  I|. <  
mergeSort(data,temp,l,mid); Xh@;4n  
mergeSort(data,temp,mid+1,r); IubzHf  
for(int i=l;i<=r;i++){ z LZ HVvL3  
temp=data; ?$.x%G+  
} Qt.|YB8  
int i1=l; |>Pz#DCy  
int i2=mid+1; ZDx1v_xr  
for(int cur=l;cur<=r;cur++){ g5lK&-yu]  
if(i1==mid+1) FYIz_GTk  
data[cur]=temp[i2++]; GC7W7B  
else if(i2>r) yi*EE%  
data[cur]=temp[i1++]; (&Mv!6]  
else if(temp[i1] data[cur]=temp[i1++]; K)GpQ|4:<  
else ?^WX] SAl  
data[cur]=temp[i2++]; 5V8`-yO9  
} tY%T  
}  TUq ,  
-q&7q  
} X/FRe[R  
V(;c#%I2  
改进后的归并排序: DWupLJpk;c  
+do* C =z  
package org.rut.util.algorithm.support;  GjyTM  
z[l_<`J$9  
import org.rut.util.algorithm.SortUtil; ^f9>tI{  
`$XgfMBf |  
/** {m/KD 'b_  
* @author treeroot ce7 $# #f  
* @since 2006-2-2 Q} |0  
* @version 1.0 8 @r>`c  
*/ !im%t9  
public class ImprovedMergeSort implements SortUtil.Sort { wU-Cb<^  
zI CAV -&  
private static final int THRESHOLD = 10; q@i.4>x  
6W9lKD_i  
/* /$^SiE+N  
* (non-Javadoc) ]l^" A~va  
* zqxN/H]z  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <SiJA`(7  
*/ Lw`}o`D  
public void sort(int[] data) { uTvf[%EHW  
int[] temp=new int[data.length]; 0u bf]Z  
mergeSort(data,temp,0,data.length-1); SK 5__Ix  
} zvwv7JtB  
&/?OP)N,}  
private void mergeSort(int[] data, int[] temp, int l, int r) { BiA^]h/|  
int i, j, k; K0\`0E^,  
int mid = (l + r) / 2; kH?PEA! \  
if (l == r) Y mm*p,`  
return; _ygdv\^Tet  
if ((mid - l) >= THRESHOLD) !'Ww%ZL\   
mergeSort(data, temp, l, mid); .J?RaH{i  
else ik5"9b-\<  
insertSort(data, l, mid - l + 1); I5E+=.T*ar  
if ((r - mid) > THRESHOLD) et<@3wyd]  
mergeSort(data, temp, mid + 1, r); ]F #0to  
else f{U,kCv  
insertSort(data, mid + 1, r - mid); ?f*>=;7=  
j-v/;7s/B  
for (i = l; i <= mid; i++) { Sg1 ,9[pb  
temp = data; ;}'Z2gZ B  
} Q}uh`?t  
for (j = 1; j <= r - mid; j++) { wsgT`M'J[  
temp[r - j + 1] = data[j + mid]; Yu:($//w  
} o(D6  
int a = temp[l]; M $zt;7P|  
int b = temp[r];  rB_ESNx  
for (i = l, j = r, k = l; k <= r; k++) { Mo\nY5  
if (a < b) { ([]\7}+8  
data[k] = temp[i++]; gB0Q0d3\G,  
a = temp; M7ug < 8i  
} else { [ZD`t,x(  
data[k] = temp[j--]; X/H2c"!t  
b = temp[j]; )2J#pz?.  
} zLg_0r*h1  
} pIY3ft\  
} ceAefKdb  
Ryn@">sVI  
/** hA+;eXy/  
* @param data M1I4Ot  
* @param l tDtqTB}  
* @param i Qm4cuV-0{  
*/ 5Zl7crA[  
private void insertSort(int[] data, int start, int len) { z5W;-sCz  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J7k=5Fqej;  
} zwK$ q=-:  
} W3&~[DS@~  
} Ox6^=D "  
} TSj)XU {W  
aZCxyoh+  
堆排序: D!D}mPi[  
1~[GGl  
package org.rut.util.algorithm.support; $it>*%  
wD SSgk  
import org.rut.util.algorithm.SortUtil; Y^gIvX  
j&0t!f.Rv  
/** <<6gsKP  
* @author treeroot fa,;Sw  
* @since 2006-2-2 ~TjTd  
* @version 1.0 `!.c_%m2  
*/ d{DBG}/Yg  
public class HeapSort implements SortUtil.Sort{ x)T07,3:  
U!T#'H5'-  
/* (non-Javadoc) 6+Y@dJnPT  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EI@ep~  
*/ kv`5"pa7M  
public void sort(int[] data) { +'UxO'v3]  
MaxHeap h=new MaxHeap(); t_Ul;HVPS  
h.init(data); }TU2o3Q  
for(int i=0;i h.remove(); o+?Ko=vYw  
System.arraycopy(h.queue,1,data,0,data.length); /_r{7Gq.  
} a2H_8iQ!  
Q]-r'pYr  
private static class MaxHeap{ =GLMdhD]  
s_76)7  
void init(int[] data){ I2C1mV  
this.queue=new int[data.length+1]; 5S4`.'  
for(int i=0;i queue[++size]=data; >|JMvbje  
fixUp(size); sE0,b  
} 7` t,   
} Og kb N`  
eb<' >a  
private int size=0; g= s2t"&  
;+Mr|vweTC  
private int[] queue; DkBVk+  
e3kdIOu5  
public int get() { IE&G7\>(yO  
return queue[1]; [q!)Y:|u_>  
} IF3V5Q  
_x?S0R1  
public void remove() { m\ /V0V\  
SortUtil.swap(queue,1,size--); \>4x7mF!  
fixDown(1); WI54xu1M  
} *JVJKqed  
file://fixdown .T}S[`Yx5  
private void fixDown(int k) { dNz!2mbO  
int j; |R(rb-v  
while ((j = k << 1) <= size) { r'u[>uY  
if (j < size %26amp;%26amp; queue[j] j++; 8C2!Wwz`J8  
if (queue[k]>queue[j]) file://不用交换 VB{G% !}  
break;  Fr9_!f  
SortUtil.swap(queue,j,k); FBrJVaF  
k = j; )F:UkS  
} eXMl3Lxf  
} C-ipxL"r  
private void fixUp(int k) { HO;,Ya^l  
while (k > 1) { 1iE*-K%Q  
int j = k >> 1; k!m9 l1x  
if (queue[j]>queue[k]) K|-RAjE  
break; [E/8E h<  
SortUtil.swap(queue,j,k); z#sSLE.$Z  
k = j; P4~C0z  
} N9cUlrDO  
} O)G^VD s  
Zh.[f+l]  
} P3V }cGZ  
}L|XZL_Jo#  
} S|ADu]H(  
(+0yZ7AZ  
SortUtil: wGnFDkCNz  
u/L\e.4  
package org.rut.util.algorithm; S31+ j:"  
G-sA)WOF  
import org.rut.util.algorithm.support.BubbleSort; y&+Sp/6BYA  
import org.rut.util.algorithm.support.HeapSort; 44cy_  
import org.rut.util.algorithm.support.ImprovedMergeSort; XJi^gT N  
import org.rut.util.algorithm.support.ImprovedQuickSort; @0q*50  
import org.rut.util.algorithm.support.InsertSort; l&v&a!EU  
import org.rut.util.algorithm.support.MergeSort; ZNG{:5u,  
import org.rut.util.algorithm.support.QuickSort; [7SR2^uf<j  
import org.rut.util.algorithm.support.SelectionSort; ,]-A~^|  
import org.rut.util.algorithm.support.ShellSort; {siIRl2&  
C@s;0-qL  
/** d<4q%y'X{  
* @author treeroot 8VZLwhj  
* @since 2006-2-2 O PVc T  
* @version 1.0 XRR`GBI  
*/ X7& ^"|:  
public class SortUtil { Y/< ],1U  
public final static int INSERT = 1; QOY M/1U  
public final static int BUBBLE = 2; 8&9'1X5)8_  
public final static int SELECTION = 3; d512Y[ R  
public final static int SHELL = 4; %q 7gl;'  
public final static int QUICK = 5; n+uDg  
public final static int IMPROVED_QUICK = 6; h^"OC$  
public final static int MERGE = 7; ?BnjtefIe  
public final static int IMPROVED_MERGE = 8; 3L(vZ2&  
public final static int HEAP = 9; Qz/1^xy  
{H%1sI  
public static void sort(int[] data) { ;]Bkw6 o  
sort(data, IMPROVED_QUICK); `@|Kx\y4=j  
} ?AJE*=b  
private static String[] name={ 0^rDf L  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tXnD>H YV  
};  6,;7iA]  
FrryZe=  
private static Sort[] impl=new Sort[]{ H:M;H =0  
new InsertSort(), xu7Q^F#u  
new BubbleSort(), S?Z"){  
new SelectionSort(), vS'5Lm  
new ShellSort(), ,\n%e'  
new QuickSort(), ,BG L|5?3z  
new ImprovedQuickSort(), Vtr5<:eEx  
new MergeSort(), kI>PaZ`i)  
new ImprovedMergeSort(), ThSB\  
new HeapSort() YE\s<$  
}; EAM2t|M G.  
YX:[],FP  
public static String toString(int algorithm){ Kwa$5qZI  
return name[algorithm-1]; -Lbi eS%  
} s0x;<si_  
#y&O5    
public static void sort(int[] data, int algorithm) { L@HWm;aN  
impl[algorithm-1].sort(data); n:wZL&ZV0  
} s>^$: wzu  
!q_fcd^c  
public static interface Sort { 3fWL}]{<a  
public void sort(int[] data); h\i>4^]X.  
} D#G(&<Q  
Lcpz(W ^  
public static void swap(int[] data, int i, int j) { Xi!`+N4  
int temp = data; h^$ c  
data = data[j]; VDP \E<3"  
data[j] = temp; 2{o eJ  
} 5?n@.hcL  
} @ "=wn:O+  
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