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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。 %;GDg3L[p  
插入排序: 7Y:1ji0l  
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package org.rut.util.algorithm.support; op;OPf,  
I U/gYFT  
import org.rut.util.algorithm.SortUtil; O",:0<  
/** 4\3Z$%2^LZ  
* @author treeroot Ve<l7U;  
* @since 2006-2-2 i&RPY bT{  
* @version 1.0 Tw=Jc 's  
*/ 4&}LYSZl  
public class InsertSort implements SortUtil.Sort{ LyH{{+V  
awGI|d  
/* (non-Javadoc) .#@*)1A#t  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |.X?IJ`  
*/ Pr9$( 6MX  
public void sort(int[] data) { }5\F<b^@Y  
int temp; 3V2 "1Ic  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); USv: + .  
} e+j7dmGa  
} fQM:NI? 9?  
} ) m[0,  
jUYb8:B  
} UO>ADRs}  
^ 14U]<  
冒泡排序: uL`;KD  
xM'bb5  
package org.rut.util.algorithm.support; 4u0=/pfi[  
Ru `&>E  
import org.rut.util.algorithm.SortUtil; ~J)_S' #  
8i;EpAwB  
/** x[zt(kC0+  
* @author treeroot ,E<(K8  
* @since 2006-2-2 unKi)v1  
* @version 1.0 vWc=^tT   
*/ W{<_gD9  
public class BubbleSort implements SortUtil.Sort{ akoK4!z  
1YL6:5n  
/* (non-Javadoc) q,(U8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,3=|a|p  
*/ KEEHb2q  
public void sort(int[] data) { Dyyf%'\M  
int temp; ],V_"\ATD  
for(int i=0;i for(int j=data.length-1;j>i;j--){ @@M 2s(  
if(data[j] SortUtil.swap(data,j,j-1); hCS|(8g  
} u_shC"X:  
} jvv3;lWDL.  
} F jsnFX;  
} qj/ pd 7\  
<b !nI N  
} pUi|&F K">  
ssj(-\5  
选择排序: >+ZBQ]~  
p=sL KnLmZ  
package org.rut.util.algorithm.support; ~gg(i"V  
noJ5h |  
import org.rut.util.algorithm.SortUtil; O eLM*Zi  
9.)*z-f$  
/** {xJq F4  
* @author treeroot D+.< kY.  
* @since 2006-2-2 dNK Q&TC  
* @version 1.0 ;;;aM:6\  
*/ iZm# "}VG  
public class SelectionSort implements SortUtil.Sort { P@lDhzd  
J)tk<&X  
/* 2^RWGCEv  
* (non-Javadoc) Vz_ac vfk^  
* lOB*M!8   
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t+y$i@R:  
*/ 4j+FDc`  
public void sort(int[] data) { 0se0AcrW  
int temp; #y;TSHx/  
for (int i = 0; i < data.length; i++) { 742 sqHx  
int lowIndex = i; ;r<(n3"F  
for (int j = data.length - 1; j > i; j--) { "u^%~2  
if (data[j] < data[lowIndex]) { tjLp;%6e  
lowIndex = j; <j\osw1R  
} K=lm9K  
} tf<}%4G  
SortUtil.swap(data,i,lowIndex); P5;n(E(19  
} vfBIQfH  
} 2yB)2n#ut  
v|~&I%S7  
} wMc/O g  
b~$B 0o)  
Shell排序: Em6P6D>S>,  
pAK7V;sJ  
package org.rut.util.algorithm.support; xwvg @  
Yvmo%.oU  
import org.rut.util.algorithm.SortUtil; n`v;S>aT  
5~8FZ-x  
/** w2 %u;D%  
* @author treeroot i*ibx;s-  
* @since 2006-2-2 [k<"@[8)  
* @version 1.0 1=o|[7  
*/ xbUL./uj  
public class ShellSort implements SortUtil.Sort{ ,EsPm'`?A/  
9c pjO  
/* (non-Javadoc) 0 $Ygt0d  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^v2-"mX<  
*/ skSs|slp  
public void sort(int[] data) { HV0!G-h  
for(int i=data.length/2;i>2;i/=2){ d;:H#F+ (  
for(int j=0;j insertSort(data,j,i); g<b(q|  
} SK][UxoHm  
} BeR7LV  
insertSort(data,0,1); yZHh@W4v  
} $RAS pM  
rHSA5.[1P  
/** 8VWkUsOoI  
* @param data J~jxmh  
* @param j *HC[LM  
* @param i TK! D=M  
*/ <q}w,XU  
private void insertSort(int[] data, int start, int inc) { uDe%M  
int temp; .@5Ro D[o  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); `qXCY^BH2  
} 7A,QA5G ]C  
} dx.,  
} V?[dg^*0  
(Ci{fY6`  
} ?@@BIg-  
'ptD`)^(  
快速排序: [<0\v<{`L  
II,snRD  
package org.rut.util.algorithm.support; '!V5 #J  
@gc|Z]CV  
import org.rut.util.algorithm.SortUtil; t%k1=Ow5i  
:Qc[>:N  
/** ^i;y2c  
* @author treeroot Q:v9C ^7  
* @since 2006-2-2 tMy<MO)Ei  
* @version 1.0 XT "-   
*/ -O~ V4004  
public class QuickSort implements SortUtil.Sort{ s:p6oEQ=J  
U??T>  
/* (non-Javadoc) Hyn*O)q!  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Le?yzf  
*/ P&g.%8b~84  
public void sort(int[] data) { U%PII>s'#  
quickSort(data,0,data.length-1); G+k~k/D6  
} ?7eD< |  
private void quickSort(int[] data,int i,int j){ S.)+C2g,@  
int pivotIndex=(i+j)/2; I\y=uC  
file://swap  ?|$IZ9  
SortUtil.swap(data,pivotIndex,j); .[Hv/?L  
$~G=Hcl9  
int k=partition(data,i-1,j,data[j]); XX9u%BZ~  
SortUtil.swap(data,k,j); n !oxwA!  
if((k-i)>1) quickSort(data,i,k-1); #P,C9OQD  
if((j-k)>1) quickSort(data,k+1,j); yG/_k !{9  
{>]7xTpwZ  
} x$gVEh*k  
/** HLruZyN4  
* @param data 6 @X j  
* @param i xRiWg/Z~  
* @param j K}KgCJ3  
* @return &pk&8_=f  
*/ BIK^<_?+ZU  
private int partition(int[] data, int l, int r,int pivot) { 9$iDK$%  
do{ 4UV6'X)V  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); WF&?OHf2  
SortUtil.swap(data,l,r); '*d);{D8  
} 7%7 \2!0J}  
while(l SortUtil.swap(data,l,r); L2WH-XP=  
return l; +<TnE+>j  
} ]ysEj3  
lDU@Q(V#}<  
} FHv^^u'@  
3B^`xnV  
改进后的快速排序: $TK<~3`  
(Z)F6sZ`8  
package org.rut.util.algorithm.support; H%&e[PU  
F?jFFw im  
import org.rut.util.algorithm.SortUtil; z{uRq A G  
>vny9^_  
/** E4;@P']`  
* @author treeroot [(d))(M$|  
* @since 2006-2-2 *y@Xm~ld  
* @version 1.0 xkPH_+4i8  
*/ Ug~ ]!L  
public class ImprovedQuickSort implements SortUtil.Sort { cZFG~n/  
.^o3  
private static int MAX_STACK_SIZE=4096; ^:Hx.  
private static int THRESHOLD=10; R>#BJ^>=  
/* (non-Javadoc) wBa IN]Y,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !7fL'  
*/ #|ILeby  
public void sort(int[] data) { x<lY&KQ0  
int[] stack=new int[MAX_STACK_SIZE]; EsK.g/d  
J =j6rD  
int top=-1; Oh]RIWL  
int pivot; EW}7T3g  
int pivotIndex,l,r; NJqjW  
)B1gX>J\8  
stack[++top]=0; NAnccB D!{  
stack[++top]=data.length-1; lBN1OL[N  
'ai3f  
while(top>0){ o)}M$}4  
int j=stack[top--]; J.;{`U=:  
int i=stack[top--]; s(u,mtG  
qwd7vYBc,  
pivotIndex=(i+j)/2; Kb icP<  
pivot=data[pivotIndex]; ?mME^?x Mu  
Zp'q;h_  
SortUtil.swap(data,pivotIndex,j); J}M_Ka  
ab/^z0GT  
file://partition >$ok3-tuU  
l=i-1; iI 4XM>`a  
r=j; )u67=0s2i+  
do{ TTQ(\l4  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); Lo-\;%y  
SortUtil.swap(data,l,r); \:[J-ySJ  
} >v9@p7Dn  
while(l SortUtil.swap(data,l,r); 6%Ws>H4@|  
SortUtil.swap(data,l,j);  !L|PDGD  
e4rhB"qQdn  
if((l-i)>THRESHOLD){ tY>_ +)oi  
stack[++top]=i; M tD{/.D>  
stack[++top]=l-1; Ao}J   
} PrwMR_-  
if((j-l)>THRESHOLD){ 7~H.\4HB  
stack[++top]=l+1; 6:$+"@ps  
stack[++top]=j; FM=- ^l,  
} N |nZf5{  
u ^}R]:n  
} rfwX:R6,g  
file://new InsertSort().sort(data); pGHn   
insertSort(data);  L4 )  
} M s5L7S  
/** ;:l>Kac  
* @param data 9&VfbrBM  
*/ ^PrG5|,s  
private void insertSort(int[] data) { L2P#5B!S  
int temp; y%NZ(Y,v  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); \-eDNwJ:#@  
} 2J0N]`|)  
} xmp^`^v*  
} oy< q;'  
^\Gukkmh}  
} Pko2fJt1  
_a[)hu8q.  
归并排序: DwBKqhu  
UP?]5x>  
package org.rut.util.algorithm.support; XkE'k;AEx  
-ZKo/ N>6}  
import org.rut.util.algorithm.SortUtil; XaH%i~}3  
?jy6%Y#,i  
/**  XeRbn  
* @author treeroot AC& }8w[>u  
* @since 2006-2-2 GL- r;  
* @version 1.0 < X&{6xu  
*/ U|!L{+F  
public class MergeSort implements SortUtil.Sort{ 8H<:?D/tH  
9X%H$>s  
/* (non-Javadoc) SIr^\iiOB  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 530Z>q  
*/ hDAxX= FM  
public void sort(int[] data) { V3] Z~@  
int[] temp=new int[data.length]; ZL{\M|@jz  
mergeSort(data,temp,0,data.length-1); 6Q}WX[| tQ  
} /QT"5fxKJ  
<-avC/M$d  
private void mergeSort(int[] data,int[] temp,int l,int r){ .e|VW)  
int mid=(l+r)/2; f.X<Mo   
if(l==r) return ; yL.Z{wd  
mergeSort(data,temp,l,mid); :3$$PdZ  
mergeSort(data,temp,mid+1,r); ;wF 0s  
for(int i=l;i<=r;i++){ t.YY?5 l  
temp=data; !GL kAV  
} ER4j=O#  
int i1=l; B^yA+&3HI  
int i2=mid+1; fRT4,;  
for(int cur=l;cur<=r;cur++){ y?4%eD  
if(i1==mid+1) 1GA$nFBVC  
data[cur]=temp[i2++]; }k7t#O  
else if(i2>r) B!X;T9^d  
data[cur]=temp[i1++]; 1NI%J B  
else if(temp[i1] data[cur]=temp[i1++]; y)%CNH)*x  
else . v L4@_  
data[cur]=temp[i2++]; {=)g?!zC  
} [n!5!/g>j  
} ^_C]?D?  
LH_rc  
} =FfxHo1k  
^w1&A 3=6  
改进后的归并排序: R3,O;9i  
G:k]tZ*`  
package org.rut.util.algorithm.support; "z/)> ?Wn  
zv>3Tc0R  
import org.rut.util.algorithm.SortUtil; 8a}et8df:  
~n<U8cm O  
/** dd&n>A3O=  
* @author treeroot 7>sNjOt@M  
* @since 2006-2-2 |MEu"pY)  
* @version 1.0 <[W41{  
*/ g(`m#&P>G  
public class ImprovedMergeSort implements SortUtil.Sort { |?=a84n1l  
:\sz`p?EC  
private static final int THRESHOLD = 10; yR|Beno  
T|fmO<e*n  
/* piv/QP-X  
* (non-Javadoc) 7%x 3o#&  
* Q(gc(bJV  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n9p_D  
*/ byrK``f  
public void sort(int[] data) { ~8#Ku,vEy  
int[] temp=new int[data.length]; \ f6@B:?y  
mergeSort(data,temp,0,data.length-1); ^S]-7>Yyr  
} |y T-N3H@  
njoU0f1`  
private void mergeSort(int[] data, int[] temp, int l, int r) { vy&< O  
int i, j, k; '1u!@=.\G  
int mid = (l + r) / 2; U.mVz,k3  
if (l == r) dd=' ;%?  
return; }/cMG/%  
if ((mid - l) >= THRESHOLD) qC;1ND  
mergeSort(data, temp, l, mid); JxlU=7cF  
else 7=e!k-G  
insertSort(data, l, mid - l + 1); ;3 |Z}P  
if ((r - mid) > THRESHOLD) eq<giHJM  
mergeSort(data, temp, mid + 1, r); ZBX,4kxK7  
else sb^%eUU])  
insertSort(data, mid + 1, r - mid); !rwe|"8m?u  
aOWfu^&H:  
for (i = l; i <= mid; i++) { djGzJLH  
temp = data; 4PsJs<u  
} ]`S35b  
for (j = 1; j <= r - mid; j++) { t^Hte^#S  
temp[r - j + 1] = data[j + mid]; &t0toEj  
} PX%Y$`  
int a = temp[l]; `EjPy>kM  
int b = temp[r]; 6L\?+=X  
for (i = l, j = r, k = l; k <= r; k++) { gOnVN6  
if (a < b) { (w+dB8 )X  
data[k] = temp[i++]; N9s ,..  
a = temp; gr%!<2w  
} else { h4\j=Np  
data[k] = temp[j--]; XX@@tzN  
b = temp[j]; p~h)@  
}  | D?lF  
} WOgPhJ  
} >AsrPU[  
vXA+4 ?ZG  
/** OB&lq.r  
* @param data '=^$ ;3Z  
* @param l K}(0H[P  
* @param i 4Em$L]7   
*/ F N)vFQ#J  
private void insertSort(int[] data, int start, int len) { <+%#xi/_  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /N'|Vs,X  
} \@ j YY~  
} v]tNJ=aI  
} :vqfWK6mv  
} fNkN  
T9,T'y>BD  
堆排序: ~SWR|[  
[kjmEMF9i  
package org.rut.util.algorithm.support; lN<,<'&^.  
S@N:Cj  
import org.rut.util.algorithm.SortUtil; w N-np3k  
"AAzBWd/  
/** q!5 *) nw"  
* @author treeroot Z6Owxqfht  
* @since 2006-2-2 g'F{;Ur  
* @version 1.0 W%)uKQha  
*/ +}u{{  
public class HeapSort implements SortUtil.Sort{ Wg3\hv29  
_ zh>q4M  
/* (non-Javadoc) <Fc @T4Q,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h)vRvfcmY  
*/ 2?)bpp$WZ  
public void sort(int[] data) { +Je(]b @  
MaxHeap h=new MaxHeap(); ~|7jz;$V  
h.init(data); w,'"2^Cwy  
for(int i=0;i h.remove(); 3O W) %  
System.arraycopy(h.queue,1,data,0,data.length); vXio /m  
} WrS|$: 0  
cjd Z.jR2  
private static class MaxHeap{ /%fa_+,|-  
;T6x$e  
void init(int[] data){ Bx>)i8P7i0  
this.queue=new int[data.length+1]; @y#QHJ.j  
for(int i=0;i queue[++size]=data; : Y{aa1  
fixUp(size); Xg](V.B6  
} s /? &H-  
} n$ri:~s  
RuW62QSq  
private int size=0; J:{$\m'  
-RSPYQjz  
private int[] queue; Zv`j+b  
#\Q{?F!4  
public int get() { b0~AN#Es  
return queue[1]; t:|+U:! >  
} }Z|uLXaz  
sw(dd01a 7  
public void remove() { ~"Pu6-\VT  
SortUtil.swap(queue,1,size--); E%f;Z7G  
fixDown(1); g' xR$6t  
} 0NN{2"M$p  
file://fixdown Mbt}G|;8H7  
private void fixDown(int k) { :oH~{EQ  
int j; A1zqm_X5)P  
while ((j = k << 1) <= size) { d" "GG/  
if (j < size %26amp;%26amp; queue[j] j++; Whf7J'  
if (queue[k]>queue[j]) file://不用交换 NW.<v /?=,  
break; 4)o_gm~6c4  
SortUtil.swap(queue,j,k); o4)^U t+  
k = j; {L!w/IeX  
} +&W%]KEh  
} H?dmNwkPY  
private void fixUp(int k) { hLVS}HE2  
while (k > 1) { \LFRu  
int j = k >> 1; {\OIowa  
if (queue[j]>queue[k]) 5aF03+ko  
break; 4{:W5eT!/  
SortUtil.swap(queue,j,k); k~(j   
k = j; =sqh PS<>  
} YU89m7cc'  
} o@?3i+%}8  
Ek [V A\G  
} kAbkhZ1^  
H!F Cerg  
} FkdG@7Xf  
p0KkPE">p4  
SortUtil: \haJe~  
@#T*OH  
package org.rut.util.algorithm; $B6"fYiDk  
Xd_86q8o  
import org.rut.util.algorithm.support.BubbleSort; U/ncD F%C  
import org.rut.util.algorithm.support.HeapSort; 6]i"lqb  
import org.rut.util.algorithm.support.ImprovedMergeSort; E^.y$d~dS  
import org.rut.util.algorithm.support.ImprovedQuickSort; 5Rv6+d  
import org.rut.util.algorithm.support.InsertSort; IT,TSs/Y  
import org.rut.util.algorithm.support.MergeSort; Lm kv .XF  
import org.rut.util.algorithm.support.QuickSort; y.AF90Q>)  
import org.rut.util.algorithm.support.SelectionSort; YfC1.8  
import org.rut.util.algorithm.support.ShellSort; zN(fZT}K5  
XE_|H1&j  
/** /B$"fxFf  
* @author treeroot 8&6h()  
* @since 2006-2-2 ,x| 4nk_  
* @version 1.0 u,:GJU  
*/ Zho d%n3  
public class SortUtil { z6)SaSYE  
public final static int INSERT = 1; |-N\?N9"  
public final static int BUBBLE = 2; Azx4+`!-  
public final static int SELECTION = 3; D?w?0b Eu  
public final static int SHELL = 4; `}1IQ.3  
public final static int QUICK = 5; L\||#w   
public final static int IMPROVED_QUICK = 6; l`L}*Q- 5  
public final static int MERGE = 7; h+k:G9;sS  
public final static int IMPROVED_MERGE = 8; .Od.lxz"mp  
public final static int HEAP = 9; Y`S9mGR#  
OO@ (lt  
public static void sort(int[] data) { O:fv1  
sort(data, IMPROVED_QUICK); m~%\f8w-x  
} TIg 3'au  
private static String[] name={ 8LP L4l  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uBLI!N-G  
}; X>w(^L*>  
a3i4eGT-  
private static Sort[] impl=new Sort[]{ U2=l; R{  
new InsertSort(), t\nYUL-H  
new BubbleSort(), .jRp.U  
new SelectionSort(), 2f1WT g)  
new ShellSort(), <d,Qi.G4  
new QuickSort(), 6[kp#  
new ImprovedQuickSort(), .g.v  
new MergeSort(), x^kV;^ I  
new ImprovedMergeSort(), "nX L7N0  
new HeapSort() 7aVQp3<  
}; YC#N],#  
c&.>SR')  
public static String toString(int algorithm){ X cmR/+  
return name[algorithm-1]; [*U6L<JI  
} MtC\kTW  
<rc?EV  
public static void sort(int[] data, int algorithm) { <Q'J=;vV  
impl[algorithm-1].sort(data); 2xvTijO0  
} Jrd:6Z  
1BK-uv:  
public static interface Sort { Al="ss&2  
public void sort(int[] data); R]e?<,"X  
} H8+7rM  
<zE,T@c  
public static void swap(int[] data, int i, int j) { smQ<lwA  
int temp = data; 4S>A}rWz  
data = data[j]; 0R&$P 6  
data[j] = temp; )(`I1"1   
} k3::5&  
} Q?KWiFA}'  
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