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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。 h!e2 +4{4{  
插入排序: <uD qYT$6  
.oR3Q/|k]  
package org.rut.util.algorithm.support; c@(1:,R  
#*2Rp8n  
import org.rut.util.algorithm.SortUtil; Jq .L:>x  
/** %LQ/q 3?_  
* @author treeroot %8w9E=  
* @since 2006-2-2 3wC R|ab}  
* @version 1.0 [bjN f2  
*/ RtC'v";6  
public class InsertSort implements SortUtil.Sort{ #mLuU  
ArzDI{1  
/* (non-Javadoc) [AR>?6G-  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O?ktWHUx  
*/ |s=`w8p  
public void sort(int[] data) { 73 V"s  
int temp; PZ,z15PG]  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ~Ltr.ci  
} &U"X $aFc  
}  &?+WXL>  
} ll<mE,  
zOGR+Gq_Z  
} KDey(DN:  
*)>do L  
冒泡排序: vM4<d>  
2 9#]Vr  
package org.rut.util.algorithm.support; 6y  Wc1  
mqFq_UX/ T  
import org.rut.util.algorithm.SortUtil; V1<`%=%_W  
'jvpNn  
/** q`Q}yE> 9  
* @author treeroot ;7rv  
* @since 2006-2-2 5~r2sCDPk  
* @version 1.0 ^8K/xo-  
*/ 'MQ%)hipA  
public class BubbleSort implements SortUtil.Sort{ 9y~"|t  
u) *Kws  
/* (non-Javadoc) [uR/M  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }9&9G%  
*/ IR$ (_9z  
public void sort(int[] data) { lTz6"/  
int temp; z~Na-N  
for(int i=0;i for(int j=data.length-1;j>i;j--){ T~k)uQ  
if(data[j] SortUtil.swap(data,j,j-1); }htPTOy5  
} $1 @,Qor  
} tu}>:mk  
} Q"VMNvKYB  
} N.hzKq][  
CAgaEJhX3  
} A';QuWdT  
213\ehhG<  
选择排序: %Q4i%:Qi  
SY _='9U  
package org.rut.util.algorithm.support; %l$W*.j|;  
WzlC*iv  
import org.rut.util.algorithm.SortUtil; "s_Z&  
urZ8j?}c  
/** @8gEH+r  
* @author treeroot g.C5r]=+&  
* @since 2006-2-2 3!#/k+,C  
* @version 1.0 3-x%wD.  
*/ i_l+:/+G+  
public class SelectionSort implements SortUtil.Sort { o4Q3<T7nI  
PRr*]$\&Mj  
/* -=5)NH t  
* (non-Javadoc) 8^ #mvHah  
* `ROG~0lN(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &drFQ|  
*/ hh"-w3+  
public void sort(int[] data) { !%S4 n  
int temp; N|dD!  
for (int i = 0; i < data.length; i++) { :zp`6l  
int lowIndex = i; srmKaa|  
for (int j = data.length - 1; j > i; j--) { ISNcswN#  
if (data[j] < data[lowIndex]) { o`?zF+M0  
lowIndex = j; jw>h k  
} jP=Hf=:$  
} >^SEWZ_[  
SortUtil.swap(data,i,lowIndex); ^T079=$5  
} p'Bm8=AwD  
} s3 B'>RG}  
3V;gW%>  
} .+.j*>q>u  
8r:M*25  
Shell排序: Ix8$njp[  
ht6244:  
package org.rut.util.algorithm.support; S!Jh2tsg`-  
wAF,H8 -DK  
import org.rut.util.algorithm.SortUtil; yoS? s  
9M-K]0S(  
/** wk $,k  
* @author treeroot +%#8k9Y  
* @since 2006-2-2 c:\shAM&  
* @version 1.0 82:Wvp6  
*/ bB 6[Xj{  
public class ShellSort implements SortUtil.Sort{ aMwB>bt  
Y A&`&$  
/* (non-Javadoc) D"l+iVbBP  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :T@r*7hNT  
*/ @;^Y7po6u  
public void sort(int[] data) { Zi ESlf$  
for(int i=data.length/2;i>2;i/=2){ Q*ju sm  
for(int j=0;j insertSort(data,j,i); k$"d^*R  
} &|o$=Ad  
} d7Ro}>lp  
insertSort(data,0,1); <+U|dX  
} FN87^.^2S  
MDO$m g  
/** E4oz|2!m  
* @param data m&Yi!7@(  
* @param j jai|/"HSXw  
* @param i Gi?_ujZR  
*/ QU5Sy oL[  
private void insertSort(int[] data, int start, int inc) { w# y2_  
int temp; vmZ"o9-{#X  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); Gt-UJ-RR y  
} 6NLW(?]  
} t~p y=\  
} j,-C{ K  
D4Nu8Wr$  
} B#l?IB~  
!{UTD+|=N  
快速排序: `=)2<Ca;~@  
;)hw%Z]Jj$  
package org.rut.util.algorithm.support; 5J.0&Dda  
[c&B|h=>  
import org.rut.util.algorithm.SortUtil; 2YBIWR8z  
>FF5x#^&c  
/** !!,0'c  
* @author treeroot S\x=&Rz  
* @since 2006-2-2 S]>wc yy=n  
* @version 1.0 j;nb?;  
*/ /DFV$+9  
public class QuickSort implements SortUtil.Sort{ +s[\g>i  
3=.Y,ENM;  
/* (non-Javadoc) 5er@)p_  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8*a), 3aK  
*/ kuMKX`_  
public void sort(int[] data) { v zo4g,Bj  
quickSort(data,0,data.length-1); TJ_=1Y@z  
} iLX_T]1  
private void quickSort(int[] data,int i,int j){ 7}o/:  
int pivotIndex=(i+j)/2; yW7'?  
file://swap gX @`X  
SortUtil.swap(data,pivotIndex,j); -_A$DM!^=w  
` }gbc69  
int k=partition(data,i-1,j,data[j]); :7.Me ;RA  
SortUtil.swap(data,k,j); ^>c8t_RG  
if((k-i)>1) quickSort(data,i,k-1); ^krk&rW3  
if((j-k)>1) quickSort(data,k+1,j); ,[rPe\w.z  
TpfZ>d2  
} k3Cz9Vt%  
/** Nn6S 8kc  
* @param data N3A<:%s  
* @param i |`rJJFA  
* @param j I[Ic$ta  
* @return :' #\  
*/ k[|~NLB8  
private int partition(int[] data, int l, int r,int pivot) { :py\ |  
do{ kPxT" " k  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); $K}DB N; 4  
SortUtil.swap(data,l,r); s4LO&STh{  
} D)b}f`  
while(l SortUtil.swap(data,l,r); 8G^<[`.@j  
return l; %/9;ZV  
} !ku X,*}q  
A$/\1282  
} 'o4p#`R:8  
Z9`TwS@x[  
改进后的快速排序: i\?*=\a  
<O~WB  
package org.rut.util.algorithm.support; yJx?M  
U7$WiPTNL9  
import org.rut.util.algorithm.SortUtil; Vzlh+R>c  
<v 0*]NiX  
/** @I3eK^#|P  
* @author treeroot G7LIdn=  
* @since 2006-2-2 c "= N  
* @version 1.0 k\)Cw  
*/ 0$.m_0H  
public class ImprovedQuickSort implements SortUtil.Sort { g(x9S'H3l  
1eS_ nLFw~  
private static int MAX_STACK_SIZE=4096; {jKI^aC<[  
private static int THRESHOLD=10; ]B\H ~Kn  
/* (non-Javadoc) .Nm su+s  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }CGSEr4'w~  
*/ _`-1aA&n~  
public void sort(int[] data) { _D7]-3uC!  
int[] stack=new int[MAX_STACK_SIZE]; H1:be.^YP  
2{,n_w?Wy  
int top=-1; +_l^ #?o,  
int pivot; ksR1k vTm  
int pivotIndex,l,r; *>8ce-PV  
ZAKeEm2A  
stack[++top]=0; 6=hk=2]f  
stack[++top]=data.length-1; e 8\;t"D  
Rf-[svA  
while(top>0){ XMN:]!1J  
int j=stack[top--]; 7Cqcb>\X  
int i=stack[top--]; 0u B'g+MU`  
WCJxu}!  
pivotIndex=(i+j)/2; *LC+ PZV@  
pivot=data[pivotIndex]; P$GjF-!:  
TtD@'QXq  
SortUtil.swap(data,pivotIndex,j); 24c ek  
Ey[On^$  
file://partition F/d7q%I  
l=i-1; p>=[-(mt  
r=j; >x1p%^cA;=  
do{ aolN<u3G  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); K4Dp:2/K%  
SortUtil.swap(data,l,r); ^D^JzEy'?C  
} n.oUVr=nX  
while(l SortUtil.swap(data,l,r); MxQ?Sb%Gka  
SortUtil.swap(data,l,j); d)o!5L  
`Mj}md;O"  
if((l-i)>THRESHOLD){ /t<@"BoV  
stack[++top]=i; oB1>x^  
stack[++top]=l-1; U5HKRO  
} `Pn[tuIO  
if((j-l)>THRESHOLD){ 4\ c,)U}  
stack[++top]=l+1; fU3`v\X  
stack[++top]=j; Q;Wj?8}  
} #:x4DvDkR  
b^c9po  
} tirIgZ  
file://new InsertSort().sort(data); 9i5,2~  
insertSort(data); rX7QbAB  
} s?Uh|BfB  
/** r`S< A;  
* @param data &ZHC-qMRK  
*/ i`(^[h ?;  
private void insertSort(int[] data) { $*a'84-5G-  
int temp; HS>f1!  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); X@)z80  
} \<0B1m  
} y4:H3Sk  
} ma$Prd  
@Y,7'0U  
} OYC_;CP  
)py{\r9X  
归并排序: ^>y@4qB  
'uDjFQX  
package org.rut.util.algorithm.support; &5{xXWJK  
y7i%W4  
import org.rut.util.algorithm.SortUtil;  }}<Z,/O  
{+<P:jbz;  
/** fEE /-}d  
* @author treeroot ]{~NO{0@Y  
* @since 2006-2-2 ;8S/6FI  
* @version 1.0 XNM a0  
*/ |IoB?^_h  
public class MergeSort implements SortUtil.Sort{ ZR v"h/~  
;;$#)b  
/* (non-Javadoc) \AUI|M;'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >>Ts??  
*/ Zc |/{$>:W  
public void sort(int[] data) { r,goRK.  
int[] temp=new int[data.length]; K ]OK:hY4  
mergeSort(data,temp,0,data.length-1); Uawpfgc}  
} "N:XzG  
lJP1XzN_  
private void mergeSort(int[] data,int[] temp,int l,int r){ 8 #X5K  
int mid=(l+r)/2; kc'pN&]r:  
if(l==r) return ; C'=k&#<-  
mergeSort(data,temp,l,mid); UX<Qcjm$e  
mergeSort(data,temp,mid+1,r); Q(d9n8  
for(int i=l;i<=r;i++){ iGDLZE+?  
temp=data; qrvsjYi*w  
} @UBjq%z  
int i1=l; K'iIJA*Sn  
int i2=mid+1; m]_FQWfet  
for(int cur=l;cur<=r;cur++){ a9zw)A  
if(i1==mid+1) Ko&hj XHx  
data[cur]=temp[i2++]; ultG36.x  
else if(i2>r) m+{K^kr[  
data[cur]=temp[i1++]; &AuF]VT  
else if(temp[i1] data[cur]=temp[i1++]; ~m1P_`T  
else DcIvhBp  
data[cur]=temp[i2++]; "xMD,}+5$$  
} SYeadsvF  
} b5m=7;u*h  
]`g <w#  
} e}@)z3Q<l  
M'`;{^<  
改进后的归并排序: ; UiwH  
PN~@  
package org.rut.util.algorithm.support; h=kQ$`j6  
t:JI!DR  
import org.rut.util.algorithm.SortUtil; Et"?8\"n7  
vvB(r!  
/** /!}'t  
* @author treeroot ~.PO[hC  
* @since 2006-2-2 (3[z%@I  
* @version 1.0 obK*rdg ,  
*/ ~Au,#7X)  
public class ImprovedMergeSort implements SortUtil.Sort { I9o6k?$K  
T{]~07N?  
private static final int THRESHOLD = 10; r4x3$M c  
!@u>A_  
/* e& ANp0|W  
* (non-Javadoc) !$A37j6  
* Ae^X35  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oIGrA-T}  
*/ V&soN:HS  
public void sort(int[] data) { @4%L36k  
int[] temp=new int[data.length]; 1%M&CX  
mergeSort(data,temp,0,data.length-1); Q@e[5RA +]  
} j4FeSGa  
pqvOJ#?Q}=  
private void mergeSort(int[] data, int[] temp, int l, int r) { Z') pf  
int i, j, k; ?^' 7+8C*J  
int mid = (l + r) / 2; 0.r4f'vk  
if (l == r) %CZ-r"A  
return; : FAH\  
if ((mid - l) >= THRESHOLD) ?EMK8;  
mergeSort(data, temp, l, mid); 2c<&eX8"  
else o sbHs$C  
insertSort(data, l, mid - l + 1); K\[!SXg@  
if ((r - mid) > THRESHOLD) -]C c  
mergeSort(data, temp, mid + 1, r); qLncn}oNM  
else S gMrce<;  
insertSort(data, mid + 1, r - mid); 4vK8kkW1  
Dz!fpE'L  
for (i = l; i <= mid; i++) { kH*Pn'  
temp = data; JXiZB 8}  
} 3>zN/ f  
for (j = 1; j <= r - mid; j++) { D0Z\Vvy  
temp[r - j + 1] = data[j + mid]; {"*VU3%q  
} j^`X~gE  
int a = temp[l]; ^IZ)#1U  
int b = temp[r]; CZ 2`H[8  
for (i = l, j = r, k = l; k <= r; k++) { va/m~k|i  
if (a < b) { W-RqN!snJ8  
data[k] = temp[i++]; 2^~<("+w  
a = temp; `Yc _5&"  
} else { :&}odx!-!C  
data[k] = temp[j--]; vv6$>SU  
b = temp[j]; gOT+%Ab{_  
} F}Mhs17!|  
} @#+jMV$g  
} *, Ld/O;s  
.=9 s1 ~]  
/** 2.}R  
* @param data #)+- lPe  
* @param l $ E1Tb{'  
* @param i pl*~kG=  
*/ %k f>&b,Mi  
private void insertSort(int[] data, int start, int len) { NW$H"}+o  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G" b60RQ  
} W:&R~R  
} U IJx*  
} /rB{[zk  
} u%|zc=  
Qx|H1_6  
堆排序: r'/;O  
;sdN-mb  
package org.rut.util.algorithm.support; ske@uzAz  
:L?_Y/K  
import org.rut.util.algorithm.SortUtil; {B$2"q/~  
<>SdVif]  
/** .W\ve>;  
* @author treeroot +\`vq"e  
* @since 2006-2-2 }6RT,O g  
* @version 1.0 }m]q}r  
*/ jX=lAs~6  
public class HeapSort implements SortUtil.Sort{ /z."l!u6  
\L!uHAE2a  
/* (non-Javadoc) =?}twC$  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iCG`3(xL  
*/ suJ_nb  
public void sort(int[] data) { 'aJgLws*w  
MaxHeap h=new MaxHeap(); 4 k}e28  
h.init(data); cleOsj;S  
for(int i=0;i h.remove(); hP?fMW$V  
System.arraycopy(h.queue,1,data,0,data.length); s}x>J8hK  
} c|p,/L09L  
q1Qje%9@t  
private static class MaxHeap{ S*W;%J5  
0O@_ cW  
void init(int[] data){ y+mElG$F  
this.queue=new int[data.length+1]; kka"C]!  
for(int i=0;i queue[++size]=data; <zfe }0  
fixUp(size); R zR?&J  
} +`en{$%%  
} wJ"ev.A)  
=6%|?5G  
private int size=0; AMlV%U#  
1IH[g*f  
private int[] queue; </oY4$l'  
_uH9XGm  
public int get() { B:oF;~d/,  
return queue[1]; I@7/jUO  
} r((Tavn  
_j#SpL'P  
public void remove() { wvc>0?t'  
SortUtil.swap(queue,1,size--); $N+6h#  
fixDown(1); "X1vZwK8N  
} *$,+`+  
file://fixdown i s"vekC  
private void fixDown(int k) { "ORzWnE4U  
int j; W^g'}}]T  
while ((j = k << 1) <= size) { Eek9|i"p  
if (j < size %26amp;%26amp; queue[j] j++; ;_JH:}j  
if (queue[k]>queue[j]) file://不用交换 n[k1np$7?6  
break; : iCM=k  
SortUtil.swap(queue,j,k); XF,<i1ZlM  
k = j; )q^ Bj$  
} P;91~``b-  
} B!,yfTk]  
private void fixUp(int k) { D&{ *AH%Q  
while (k > 1) { b](o]O{v  
int j = k >> 1; D!FaEN  
if (queue[j]>queue[k]) 3{J.xWB@:  
break; Dx+ K+(  
SortUtil.swap(queue,j,k); Ek .3  
k = j; rg& +  
} uDG+SdyN@  
} )s")y  
&sOM>^SAD  
} av'*u  
Wc'Ehyi;  
} 9;f|EGwZ  
:EHQ .^  
SortUtil: ZlR!s!vv  
Aka^e\Y@6*  
package org.rut.util.algorithm; womq^h6  
R_e)mkE  
import org.rut.util.algorithm.support.BubbleSort; g()m/KS<  
import org.rut.util.algorithm.support.HeapSort; >Q2). E  
import org.rut.util.algorithm.support.ImprovedMergeSort; R{3CW^1  
import org.rut.util.algorithm.support.ImprovedQuickSort; bEpMaBN  
import org.rut.util.algorithm.support.InsertSort; J/Q|uRpmqr  
import org.rut.util.algorithm.support.MergeSort; j7/(sf  
import org.rut.util.algorithm.support.QuickSort; l]5%  
import org.rut.util.algorithm.support.SelectionSort; |-kEGLH[*V  
import org.rut.util.algorithm.support.ShellSort; jxY-u+B  
b7$}JCn  
/** m^tNqJs8  
* @author treeroot 4;<DJ.XlN=  
* @since 2006-2-2 h5onRa *7  
* @version 1.0 pMN<p[MB  
*/ UC!5 wVY  
public class SortUtil { |~$7X  
public final static int INSERT = 1; iHz[Zw^.s  
public final static int BUBBLE = 2; hx!`F  
public final static int SELECTION = 3; N lt4)  
public final static int SHELL = 4; YFx=b!/ s  
public final static int QUICK = 5; :XS"# ^aJ  
public final static int IMPROVED_QUICK = 6; Dd/}Ya(Gi  
public final static int MERGE = 7; \Hum}0[  
public final static int IMPROVED_MERGE = 8; lO 2k<  
public final static int HEAP = 9; zqGYOm$r  
9~Xg#{  
public static void sort(int[] data) { Fk$@Yy+}e  
sort(data, IMPROVED_QUICK); Y ><(?  
} XiG88Kwv  
private static String[] name={ <xF?~7  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap"  U42\.V0  
}; 1g i}H)  
q<XcOc5  
private static Sort[] impl=new Sort[]{ 7Po/_%  
new InsertSort(), s/ S+ ec3  
new BubbleSort(), L?f qcW{  
new SelectionSort(), ;D&wh  
new ShellSort(), M[,^KJ!  
new QuickSort(), 6Bdyf(t  
new ImprovedQuickSort(), b\L)m (  
new MergeSort(), %HEmi;  
new ImprovedMergeSort(), &7F&}7*c  
new HeapSort() \X opU"  
}; z(UX't (q  
7.|S>+Q  
public static String toString(int algorithm){ s5.k|!K  
return name[algorithm-1]; XI g|G}i.  
} h544dNo&  
Kq6qXc\x  
public static void sort(int[] data, int algorithm) { $K=z  
impl[algorithm-1].sort(data); S ljZ~x,!  
} mh8nlB  
h.LSMU (O  
public static interface Sort { B}5XRgq  
public void sort(int[] data); 6SAQDE  
} [N R1d-Wg  
}2xb&6g~o  
public static void swap(int[] data, int i, int j) { o}R|tOe  
int temp = data; JOHp?3"4  
data = data[j]; CU !.!cZ{  
data[j] = temp; nP)-Y#`~7  
} qq>44k\|)  
} {q2<KRU2+#  
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