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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。 , p_G/ OU  
插入排序: d!`lsh@tF  
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package org.rut.util.algorithm.support; NA+&jV  
3>i>@n_  
import org.rut.util.algorithm.SortUtil; CV s8s  
/** UQ5BH%EPb  
* @author treeroot  OQ6sv/  
* @since 2006-2-2 yc*<:(p  
* @version 1.0 U);OR  
*/ N6h1|_o  
public class InsertSort implements SortUtil.Sort{ bFSlf5*H  
mKV'jm0  
/* (non-Javadoc) :v`o6x8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \3r3{X _<`  
*/ [!G)$<  
public void sort(int[] data) { Yrpxy.1=F5  
int temp; tG/1pW  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); z/S,+!|z  
} X6xx2v%D  
} eK9TAW  
} aM), M]m[  
cqEHYJ;B  
} mG_BM/$  
hm3jpWi 8  
冒泡排序: 6)ycmu;!$  
.!i0_Rv5x  
package org.rut.util.algorithm.support; y?>#t^  
m=QCG)s  
import org.rut.util.algorithm.SortUtil; {DT4mG5  
h4Ia>^@  
/** uArR\k(  
* @author treeroot 7IW> >RBF  
* @since 2006-2-2 1~'_K9eE  
* @version 1.0 =<{ RX8  
*/ "x&3Z@q7  
public class BubbleSort implements SortUtil.Sort{ XvskB[\  
!qA8Zky_  
/* (non-Javadoc) IZ8y}2  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RlsVC_H\  
*/ Zm(dY*z5:J  
public void sort(int[] data) { RZO5=L9E  
int temp; '&by3y5w-3  
for(int i=0;i for(int j=data.length-1;j>i;j--){ H?uukmZl  
if(data[j] SortUtil.swap(data,j,j-1); ~GG?GB  
} ^mg*;8e Ga  
} yG&2UqX  
} cx^{/U?9}  
} ,)h)5o(?  
Q2/.6O8  
}  ]>Si0%  
qX$u4I!,  
选择排序: . uR M{Bs  
z/1{OL  
package org.rut.util.algorithm.support; ,=o0BD2q  
z856 nl  
import org.rut.util.algorithm.SortUtil; 2yKz-"E  
F>+2DlA`<e  
/** NP/>H9Q2%  
* @author treeroot 5+P@s D  
* @since 2006-2-2 `HW:^T  
* @version 1.0 by86zX  
*/ Y)XvlfJ,h?  
public class SelectionSort implements SortUtil.Sort { rg5]&<Vq8  
)"`!AerJ  
/* W#XG;  
* (non-Javadoc) nrpI5t.b  
* ( 9$"#o  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *Oo &}oAj  
*/ Y ?'tUV  
public void sort(int[] data) { :gI.l1  
int temp; Pxhz@":[  
for (int i = 0; i < data.length; i++) { N[Sb#w`[/  
int lowIndex = i; # |^^K!%  
for (int j = data.length - 1; j > i; j--) { q0O&UE)6Y  
if (data[j] < data[lowIndex]) { 8]< f$3.  
lowIndex = j; 4nkE IZ  
} "Xn%at4  
} 7Kf}O6nE  
SortUtil.swap(data,i,lowIndex); I,O#X)O|i  
} (j&A",^^S  
} 2~c~{ jl\  
lBA+zZ  
} xh0xSqDM  
*P2[qhP2  
Shell排序: #[ -\lU|  
M>l^%`  
package org.rut.util.algorithm.support; &L4 q10-N  
`v nJ4*  
import org.rut.util.algorithm.SortUtil; UQT'6* !  
7m1KR#j  
/** !/I0i8T  
* @author treeroot xxa} YIe8  
* @since 2006-2-2 @CQb[!9C  
* @version 1.0 Z=+03  
*/ IFuZ]CBz  
public class ShellSort implements SortUtil.Sort{ M{N(~ql  
 7}B   
/* (non-Javadoc) S~F`  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {3edTu  
*/ y' xF0  
public void sort(int[] data) { 7#2j>G{?]v  
for(int i=data.length/2;i>2;i/=2){ SR7j\1a/2A  
for(int j=0;j insertSort(data,j,i); #DI$Oc  
} $v27]"]  
} TbhH&kG)1  
insertSort(data,0,1); ?m"|QS!!K  
} 30F!kP*E  
V@ :20m  
/** ]=&L_(34  
* @param data HKmcQM  
* @param j fCUT[d+H  
* @param i BzbDZV  
*/ TD,nIgH`  
private void insertSort(int[] data, int start, int inc) { M##';x0  
int temp; *\XH+/]+  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); z&+ zl6  
} YD[H  
} e~\QE0Oe:  
} Z<z;L<tJ 9  
sQ1jrkm  
} }ot"Sx\.  
Q/^A #l[  
快速排序: L-h$Z0]_F  
--k:a$Nt  
package org.rut.util.algorithm.support; /iM$Tb5  
 Ewo~9 4{  
import org.rut.util.algorithm.SortUtil; {aDFK;qG.  
4A.Q21s  
/** x8N|($1  
* @author treeroot 'jaoO9KY K  
* @since 2006-2-2 <Gb %uny  
* @version 1.0 JWHS nu!  
*/ #MgvG,  
public class QuickSort implements SortUtil.Sort{ Plo,XU  
s: |M].  
/* (non-Javadoc) G*n2Ii  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _N#&psQzw  
*/ vA&Vu"}S  
public void sort(int[] data) { l I-p_K  
quickSort(data,0,data.length-1); #Ob]]!y  
} 9`Q@'( m  
private void quickSort(int[] data,int i,int j){ Jh@_9/?  
int pivotIndex=(i+j)/2; 6Z! y  
file://swap < K %j  
SortUtil.swap(data,pivotIndex,j); 80hme+e  
trYTs,KV  
int k=partition(data,i-1,j,data[j]); M<`|CVl  
SortUtil.swap(data,k,j); PpOlt.yui  
if((k-i)>1) quickSort(data,i,k-1); t&RruwN_;  
if((j-k)>1) quickSort(data,k+1,j); aW;aA'!  
 tFh|V pB  
} 1mW%  
/** S*t%RZ~a  
* @param data /L~m#HxWU  
* @param i AXW!]=?X  
* @param j "> 90E^  
* @return NGTe4Crx  
*/ Y E1Hpeb  
private int partition(int[] data, int l, int r,int pivot) { Pv){sYUh  
do{ $99R|^  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); l5O=VqCj  
SortUtil.swap(data,l,r); ]((i?{jb(  
} 5cTY;@@  
while(l SortUtil.swap(data,l,r); f&I7,"v  
return l; HOPqxI(k  
} '"xiS$b(  
G\~^&BAC  
} uP|FJLY  
]0 ~qi@  
改进后的快速排序: S+I^!gT  
Xr_pgW|  
package org.rut.util.algorithm.support; &8?`<   
8LrK94  
import org.rut.util.algorithm.SortUtil; Ja [4A0.  
iuAq.$oi{  
/** Sb"2Im>  
* @author treeroot &3DK^|Lq  
* @since 2006-2-2 :5# V^\3*  
* @version 1.0 <r\I"z$  
*/ Pes =aw  
public class ImprovedQuickSort implements SortUtil.Sort { Tov&68A~e  
! D1zXXq  
private static int MAX_STACK_SIZE=4096; c> ~:dcy  
private static int THRESHOLD=10; ;z>p8N  
/* (non-Javadoc) J$[Q?8 ka  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;Bs^iL  
*/ 5~}!@yzc  
public void sort(int[] data) { -Ktwo_ V*  
int[] stack=new int[MAX_STACK_SIZE]; h~UJCn zS  
p;->hn~D'5  
int top=-1; ?qT(3C9p  
int pivot; p_6P`Yx^e  
int pivotIndex,l,r; 'JZ_  
H1T~u{8j}  
stack[++top]=0; ^H=o3#P~L  
stack[++top]=data.length-1; R^tcr)(  
x0G>ktWq<  
while(top>0){ O/9fuEF  
int j=stack[top--]; S0xIvzS  
int i=stack[top--]; h48 bb.p2  
C*pLq5s  
pivotIndex=(i+j)/2; RKe?.  
pivot=data[pivotIndex]; zoXuFg  
sU%" azc  
SortUtil.swap(data,pivotIndex,j); #313 (PWH  
 -$R5  
file://partition gKQ@!U U8  
l=i-1; vKkf2 7  
r=j; 9::YR;NY  
do{ J/7 u7_  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); S7#0*2#[o  
SortUtil.swap(data,l,r); t>oM%/H  
} HA\A$>  
while(l SortUtil.swap(data,l,r); 8A_TIyh?  
SortUtil.swap(data,l,j); K~JC\a\0  
mxhW|}_-j  
if((l-i)>THRESHOLD){ =n)#!i  
stack[++top]=i; !F,s"  
stack[++top]=l-1; hDb HSZ  
} g TD%4V  
if((j-l)>THRESHOLD){ $68 XZCx  
stack[++top]=l+1; !vrnoFVu  
stack[++top]=j; R\ e#$"a5  
} U]mO7HK  
auoA   
} _!;\R7]  
file://new InsertSort().sort(data); 1Kc{#+a^  
insertSort(data); |vT=Nnu  
} lmp R>@o"  
/** x"!#_0TT}  
* @param data 6d(b'S^  
*/ ugRV5bUk  
private void insertSort(int[] data) { cnYYs d{  
int temp; rZ 6@b  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); r 3?5'S`  
} h!~|6nj  
} 9XY|V<}  
} N~0$x,bR  
&U8 54  
} m(h/:JZ\  
k0=|10bi  
归并排序: f`bIQ9R  
d`<#}-nh  
package org.rut.util.algorithm.support; oRV] p  
s}<)B RZi  
import org.rut.util.algorithm.SortUtil; 7dsnv)(v  
n9wj[t1/  
/** X%*brl$D  
* @author treeroot fCs\Q  
* @since 2006-2-2 #{?m  
* @version 1.0 Z,(%v.d  
*/ hE9'F(87a  
public class MergeSort implements SortUtil.Sort{ OcLg3.:L  
,2E`:#$  
/* (non-Javadoc) moZ)|y  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %y!   
*/ @m }rQT  
public void sort(int[] data) { Z={UM/6w  
int[] temp=new int[data.length]; 0<6rU  
mergeSort(data,temp,0,data.length-1); Y^T-A}?`  
} 'JJ1#kKa  
R4[. n@  
private void mergeSort(int[] data,int[] temp,int l,int r){ n">?LN-DC  
int mid=(l+r)/2; WX+< 4j  
if(l==r) return ; K[`4vsE  
mergeSort(data,temp,l,mid); fbi H   
mergeSort(data,temp,mid+1,r); WXRHG)nvL  
for(int i=l;i<=r;i++){ N8u_=b{X  
temp=data; 5EVB27k  
} pIM*c6  
int i1=l; }A)^XZ/  
int i2=mid+1; rHA/  
for(int cur=l;cur<=r;cur++){  4Ub?*  
if(i1==mid+1) 9F-ViDI.  
data[cur]=temp[i2++]; 7"h=MB_  
else if(i2>r) ft*G*.0kO  
data[cur]=temp[i1++]; dn:|m^<)  
else if(temp[i1] data[cur]=temp[i1++]; R.^Bxi-UG:  
else !nZI? z;  
data[cur]=temp[i2++]; 1o"y%*"  
} q(w1VcLZ  
} UU;Y sj  
u|:UFz^p  
} )w3XN A_V  
FRs|!\S=  
改进后的归并排序: >TH-Q[  
-wG[>Y  
package org.rut.util.algorithm.support; Q>#)LHX  
& y 2GQJE  
import org.rut.util.algorithm.SortUtil; ^5^ zo~^o  
6+{nw}e8  
/** y.TdWnXx  
* @author treeroot c@"i?  
* @since 2006-2-2 :IOn`mRYu  
* @version 1.0 Xs#?~~"aC  
*/ ocDVCCkxg  
public class ImprovedMergeSort implements SortUtil.Sort { P+_\}u;  
)BMWC k  
private static final int THRESHOLD = 10; ZJ{+_ax0K  
]h`E4B  
/* yA`]%U((  
* (non-Javadoc) =Un6|]  
* t9=|* =;9)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s$3eJ|  
*/ ? ><   
public void sort(int[] data) { ix_$Ok  
int[] temp=new int[data.length]; &*?!*+!,i  
mergeSort(data,temp,0,data.length-1); ^LQ lfd  
}  nd*!`P  
h<z/LL8|  
private void mergeSort(int[] data, int[] temp, int l, int r) { E l8.D3  
int i, j, k; 6nhfI\q3wY  
int mid = (l + r) / 2; Z<m'he  
if (l == r) _sD]Viqc  
return; |M{,}.*CU  
if ((mid - l) >= THRESHOLD) 5{x[EXE'  
mergeSort(data, temp, l, mid); c#4ZDjvm6  
else B39PDJ]hu  
insertSort(data, l, mid - l + 1); y<gYf -E+  
if ((r - mid) > THRESHOLD) p Z|nn  
mergeSort(data, temp, mid + 1, r); 5qAE9G!c  
else / hj9Q!  
insertSort(data, mid + 1, r - mid); 2%No>w}/2  
 ~d<`L[  
for (i = l; i <= mid; i++) { )]e d;V  
temp = data; oXZ@*   
} %RR|QY*  
for (j = 1; j <= r - mid; j++) { 2K7:gd8Ru  
temp[r - j + 1] = data[j + mid]; '\vmfp =  
} 'Q;?_,`  
int a = temp[l];  "%@=?X8  
int b = temp[r]; i?s&\3--Y  
for (i = l, j = r, k = l; k <= r; k++) { o dQ&0d  
if (a < b) { yl]Cm?8  
data[k] = temp[i++]; `[HoxCV3o  
a = temp; l8 2uK"M  
} else { 0:(dl@I)@  
data[k] = temp[j--]; U3R`mHr0  
b = temp[j]; )<&CnK  
} di P4]/%1  
} VBj;2~Xj4h  
} m_O=X8uj"D  
>j~70 ?  
/** >|&OcU  
* @param data n[p9$W`  
* @param l oDiv9 jm  
* @param i ofhZ@3  
*/ JdNPfkOF  
private void insertSort(int[] data, int start, int len) { -<^Q2]PE;  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w+TuS).  
} )( jNd&H  
} xg%]\#  
} MicVNs  
} u KdX4  
(HD>vNha1  
堆排序: J+*Y)k  
|N3 Co B  
package org.rut.util.algorithm.support; M/`z;a=EP  
rVW'KN  
import org.rut.util.algorithm.SortUtil; 6L% R@r  
s 17gi,"X  
/** )x O_  
* @author treeroot  l e/#J  
* @since 2006-2-2 @x>2|`65Y  
* @version 1.0 ~G^doj3|+  
*/ Z8_gI[Zn  
public class HeapSort implements SortUtil.Sort{ SPm5tU  
e<wj5:M|  
/* (non-Javadoc) <(lSNGv5N  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~(E8~)f)  
*/ 1s\hJATfz  
public void sort(int[] data) { &l*dYzqq  
MaxHeap h=new MaxHeap(); E|#R0n*  
h.init(data); Wb(0Szk;  
for(int i=0;i h.remove(); Ln -?/[E  
System.arraycopy(h.queue,1,data,0,data.length); H ?:#Ui(p  
} fmN)~-DV9`  
W3j|%  
private static class MaxHeap{ PP`n>v=n  
 jmNj#R@t  
void init(int[] data){ HcUz2Rm5XP  
this.queue=new int[data.length+1]; 1 ![bu  
for(int i=0;i queue[++size]=data; 6KTY`'I  
fixUp(size); ]>i0;R ME  
} i^KYZ4/%  
} oh)l\  
#9"_|d=l  
private int size=0; LX&P]{q KS  
a[rUU'8  
private int[] queue; <LZvh8  
@ ]3Rw[% z  
public int get() { zSXC  
return queue[1]; VMXXBa&  
} :*nBo  
PFw"ICs  
public void remove() { i|| YD-hkK  
SortUtil.swap(queue,1,size--); ygPZkvZ  
fixDown(1); -Av/L>TxlI  
} p[wjHfIq  
file://fixdown EAI[J&c  
private void fixDown(int k) { U".-C`4v  
int j; cnsGP*w  
while ((j = k << 1) <= size) { &zT~3 >2  
if (j < size %26amp;%26amp; queue[j] j++; ( r O j,D  
if (queue[k]>queue[j]) file://不用交换 %{{#Q]]&  
break; -1o1k-8d  
SortUtil.swap(queue,j,k); }lY-_y  
k = j; 1Y`MJ \9  
} <(^pHv7Q  
} [q@%)F  
private void fixUp(int k) { 4EK[gM8  
while (k > 1) { zM'-2,  
int j = k >> 1; mvw:E_  
if (queue[j]>queue[k]) l\5 NuCgRY  
break; 2V]2jxOQ  
SortUtil.swap(queue,j,k); x:xQXjJ  
k = j; cwroG#jGT  
} Wama>dy%  
} $Yka\tS'  
v\Hyu1;8  
} kr?| >6?  
x#^kv)  
} ;1%a:#5  
l0_V-|x  
SortUtil: :wZZ 1qa  
X]!@xlwF\  
package org.rut.util.algorithm; }FXRp=s  
Ie~~LU  
import org.rut.util.algorithm.support.BubbleSort; UXP;'  
import org.rut.util.algorithm.support.HeapSort; 4Q>F4 v`  
import org.rut.util.algorithm.support.ImprovedMergeSort; R4/@dA0  
import org.rut.util.algorithm.support.ImprovedQuickSort; d(!N$B\[5T  
import org.rut.util.algorithm.support.InsertSort;  b\2"1m0H  
import org.rut.util.algorithm.support.MergeSort; NEk [0  
import org.rut.util.algorithm.support.QuickSort; 9E^p i LA  
import org.rut.util.algorithm.support.SelectionSort; S&*pR3,u  
import org.rut.util.algorithm.support.ShellSort; sn( }5;  
*"ShE=\p  
/** 8'_Y=7b0Nw  
* @author treeroot xh0A2bw'OP  
* @since 2006-2-2 s,Swlo7D!  
* @version 1.0 2"O Y]d  
*/ #7=LI\  
public class SortUtil { q4{tH  
public final static int INSERT = 1; : +Kesa:E  
public final static int BUBBLE = 2; ^= G+]$8  
public final static int SELECTION = 3; \Hd B   
public final static int SHELL = 4; gL`SZr9  
public final static int QUICK = 5; wNZ7(W.U  
public final static int IMPROVED_QUICK = 6; m##=iB|;  
public final static int MERGE = 7; "puz-W'n  
public final static int IMPROVED_MERGE = 8; =&b[V"  
public final static int HEAP = 9; ([~`{,sv  
FS:WbFmc  
public static void sort(int[] data) { pZxL?N!  
sort(data, IMPROVED_QUICK); {9 O`/|  
} 7 w,FA  
private static String[] name={ 4)I#[&f  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s`RJl V  
}; hT"K}d;X  
`'WLGQG  
private static Sort[] impl=new Sort[]{ 03@| dN  
new InsertSort(), \<**SSN  
new BubbleSort(), +ctv]'P_  
new SelectionSort(), TzGm562o%  
new ShellSort(), lvi:I+VgA  
new QuickSort(), 'OCo1|iK~  
new ImprovedQuickSort(), 3:1 c_   
new MergeSort(), 0h4}RmS  
new ImprovedMergeSort(), :g#it@  
new HeapSort() \DK*> k  
}; Ir #V2]$  
:* b4/qpYv  
public static String toString(int algorithm){ uFZB8+  
return name[algorithm-1]; [dlH t;S  
} 2j1v.%  
Y{RB\}f(  
public static void sort(int[] data, int algorithm) { +Q31K7Gr  
impl[algorithm-1].sort(data); vfJk? (  
} s$x] fO  
9X9zIh]JV  
public static interface Sort { v qMk)htIz  
public void sort(int[] data); &>.1%x@R  
} q- (N Zno  
-Jo :+].  
public static void swap(int[] data, int i, int j) { ?3,tG z)  
int temp = data; h./vTNMc  
data = data[j]; 3}{5 X'  
data[j] = temp; eZ5}O0sfp  
} `)M\(_  
} <<5 :zlb  
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