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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。 b] V=wZ o  
插入排序: t%@ pyK  
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package org.rut.util.algorithm.support; E5Jk+6EcMa  
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import org.rut.util.algorithm.SortUtil; ?,C,q5 T\  
/** cn:VEF:l  
* @author treeroot 69yyVu_  
* @since 2006-2-2 s. [${S6O  
* @version 1.0 `,[c??h  
*/ 0in6 z  
public class InsertSort implements SortUtil.Sort{ JN)t'm[kyE  
W:J00rsv=`  
/* (non-Javadoc) MJ08@xGa  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xpwzzO*U  
*/ cTp+M L  
public void sort(int[] data) { bxq`E!]  
int temp; cgOoQP/#  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); K? k`U,  
} FG\?_G  
} e: tp7w 4  
} WcFZRy-erc  
|\t_I~de  
} g*M3;G  
O~VUViS6$  
冒泡排序: %BKTN@;7  
k$!&3Rh  
package org.rut.util.algorithm.support; Rw`s O:eZ  
CuNHDYQ&3  
import org.rut.util.algorithm.SortUtil; &YNhKm@"  
ZT#G:a  
/** _P:P5H8  
* @author treeroot *p^MAk9=  
* @since 2006-2-2 |t_2AV  
* @version 1.0 B#yyO>0k]  
*/ {r)M@@[  
public class BubbleSort implements SortUtil.Sort{ ,P+&-}gn9  
is$d<Y&F  
/* (non-Javadoc) m<4Lo0?nS  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZxW V ,s&p  
*/ L6.R?4B   
public void sort(int[] data) { /o2eKx  
int temp; ."O(Ig[  
for(int i=0;i for(int j=data.length-1;j>i;j--){ i1C'  
if(data[j] SortUtil.swap(data,j,j-1); <0m;|Ai'W  
} R?Qou!*]  
} Kw|`y %~  
} ZlzFmNe60  
} d mO|PswW  
~-/AKaK}  
} m/AN*` V  
FCPbp!q6  
选择排序: /2@@v|QL  
PdZSXP4;k  
package org.rut.util.algorithm.support; w[&BY  
-=w.tJD  
import org.rut.util.algorithm.SortUtil; x&d<IU)5  
JiR|+6"7  
/** l?;S>s*\?  
* @author treeroot 5Fl|=G+3@g  
* @since 2006-2-2 :.,I4>b2  
* @version 1.0 ghl9gFFj  
*/ +#no$m.bH  
public class SelectionSort implements SortUtil.Sort { 5`Bb0=j  
@[Th{HTc.G  
/* nj  
* (non-Javadoc) 4]GyuY  
* ZSNg^)cN  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z"jo xZ  
*/ |Th{*IJ <,  
public void sort(int[] data) { gnGw7V  
int temp; ~08v]j q  
for (int i = 0; i < data.length; i++) { `*a,8M%  
int lowIndex = i; i]v!o$7  
for (int j = data.length - 1; j > i; j--) { .uP$M(?j  
if (data[j] < data[lowIndex]) { ?0x;L/d])  
lowIndex = j; OZ6%AUot  
} 92i# It}-/  
} ~ocr^V{"<~  
SortUtil.swap(data,i,lowIndex); wHmEt ORo  
} ;b^@o,=  
} e_I 8Jj4  
 e(^O8  
} C1J'. !  
-_3.]o/J  
Shell排序: H;6V  
o>YR Kb  
package org.rut.util.algorithm.support; 2-4%h!  
oaHBz_pg  
import org.rut.util.algorithm.SortUtil; O_ c K 4  
0U<9=[~q7@  
/** ?=l(29tH  
* @author treeroot So:89T  
* @since 2006-2-2 !v-(O"a  
* @version 1.0 y}VKFRky  
*/ iq#Z\Y(  
public class ShellSort implements SortUtil.Sort{ &Lw| t_y  
[o~w>,a  
/* (non-Javadoc) ZD/!C9:&.0  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;p/@tr9  
*/ 8c9_=8vw  
public void sort(int[] data) { >\'yj| U,  
for(int i=data.length/2;i>2;i/=2){ ~BC5no  
for(int j=0;j insertSort(data,j,i); ?=,tcN  
} 8HzEH-J   
} ^6`U0|5mRX  
insertSort(data,0,1); l},%g%}iMU  
} p82qFzq#  
R?W8l5CIk  
/** j{vzCRa>8  
* @param data {9)f~EbM!  
* @param j =k'dbcfO$9  
* @param i &zZSWNW  
*/ 'BC-'Ot  
private void insertSort(int[] data, int start, int inc) { Y9WH%  
int temp; iG ;6e~p  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); x~W&a*WNT  
} ()r DM@  
} 7G/"!ePW6`  
} pO^ 6p%  
l6&R g-  
} U5klVl  
#&2mu  
快速排序: 8wBns)wy@  
|^1eL I  
package org.rut.util.algorithm.support; qRUz;M4  
yoH6g?!O  
import org.rut.util.algorithm.SortUtil; 'D1@+FFU0  
X#J[Nn>  
/** eRGip2^cq+  
* @author treeroot cX*^PSM  
* @since 2006-2-2 ,Yo In  
* @version 1.0 NY CkYI  
*/ SbB5J> >7J  
public class QuickSort implements SortUtil.Sort{ Z'EZPuZ!'  
1G\ugLm  
/* (non-Javadoc) yY1&h op  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =Ru i  
*/ GB -=DC6  
public void sort(int[] data) { yCz? V[49  
quickSort(data,0,data.length-1); ,Zdc  
} t~Uqsa>n@'  
private void quickSort(int[] data,int i,int j){ +h =lAHn&  
int pivotIndex=(i+j)/2; 8Hhe&B  
file://swap e0D;]  
SortUtil.swap(data,pivotIndex,j); NmeTp?)m  
K1Tzy=Z9j  
int k=partition(data,i-1,j,data[j]); os>|LPv4  
SortUtil.swap(data,k,j); 9TF[uC)-2  
if((k-i)>1) quickSort(data,i,k-1); W4N$]D=  
if((j-k)>1) quickSort(data,k+1,j); 8]0^OSS  
'{J!5x?L^  
} #hai3>9|B  
/** Hi ?],5,/  
* @param data AVi|JY)>  
* @param i cD{[rI E3  
* @param j r6^DD$X  
* @return ]Z~H9!%t  
*/ U $+rlw}  
private int partition(int[] data, int l, int r,int pivot) { l_8t[  
do{ O9opX\9  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); _h5@3>b3r  
SortUtil.swap(data,l,r); 5!AzEB  
} 3&}wfK]X  
while(l SortUtil.swap(data,l,r); /_LUys/0  
return l; ~2pctqMA  
} %3q@\:s  
0s4%22  
} tUt l>>6Iu  
r`" ?K]rI  
改进后的快速排序: b2Ct^`|M5  
d=xweU<  
package org.rut.util.algorithm.support; m86w{b$8  
p<$z!|7m  
import org.rut.util.algorithm.SortUtil; Jx 'p\*  
=Y89X6  
/** 8Uc#>Ae'_  
* @author treeroot 5H<rI?  
* @since 2006-2-2 N^)L@6  
* @version 1.0 _$1W:!f4  
*/ ><$hFrR!  
public class ImprovedQuickSort implements SortUtil.Sort { f~E'0f_  
#j@Su )+  
private static int MAX_STACK_SIZE=4096; gllXJM^ -  
private static int THRESHOLD=10; = uOFaZ4  
/* (non-Javadoc) 0`_Gj{:L  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4).q+{#k  
*/ #MI}KmH  
public void sort(int[] data) { o\2#o5#  
int[] stack=new int[MAX_STACK_SIZE]; ];IUiS1  
s7=]!7QGS!  
int top=-1; -FJ 5N}R  
int pivot; yaeX-'(Fv[  
int pivotIndex,l,r; k{9s>l~'  
5HmX-+XpK  
stack[++top]=0; y*P[* /g  
stack[++top]=data.length-1; c/pT2/y  
KaOS!e'  
while(top>0){ HmQuRW  
int j=stack[top--]; Y,?rykRj  
int i=stack[top--]; Vk[m$  
3EAu#c@q"  
pivotIndex=(i+j)/2; OrHnz981K  
pivot=data[pivotIndex]; xAsbP$J:  
Ww@R ewo  
SortUtil.swap(data,pivotIndex,j); zX(p\NU  
X1$0'u sS  
file://partition :eDwkzlHH  
l=i-1; AWGeK-^  
r=j; t + Fm?  
do{ xez~Yw2  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); :)bm+xWFF  
SortUtil.swap(data,l,r); is`le}$^y  
} 5y@JMQSO  
while(l SortUtil.swap(data,l,r); Uw4KdC  
SortUtil.swap(data,l,j); aA=qel  
"]`!#5j^WP  
if((l-i)>THRESHOLD){ <1V!-D4xu  
stack[++top]=i; '%kk&&3'  
stack[++top]=l-1; RBiDU}j  
} GtbI w  
if((j-l)>THRESHOLD){ s&z+j%;+o  
stack[++top]=l+1; Q;SMwCB0M  
stack[++top]=j; HJM-;C](  
} h@/c76}f6p  
|UE&M3S  
} k_$w+Q  
file://new InsertSort().sort(data); "<NQ2Vr]5  
insertSort(data); 5G= 2=E  
} KI#),~n S  
/** Q+gQ"l,95  
* @param data `AQv\@wp  
*/ YWjw`,EA(  
private void insertSort(int[] data) { $Y 7q2  
int temp; < JA5.6<=  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Bxak[>/  
} 3-srt^>w*  
} r0}Z&>]66N  
} E[^66(KR  
6 C;??Y>b  
} ]Z2;sA  
$ !ka8) ~  
归并排序: *tO7A$LDT  
nO2-fW:9]  
package org.rut.util.algorithm.support; o|(-0mWBQA  
C%0|o/Wi  
import org.rut.util.algorithm.SortUtil; (Z;-u+ }.  
Q]A;VNx  
/** O$LvHv!  
* @author treeroot 9psD"=/"  
* @since 2006-2-2 6 O!&!  
* @version 1.0 8E ^yHd4Y  
*/ /c8F]fkZ=  
public class MergeSort implements SortUtil.Sort{ zuwCN.  
+.NopI3:  
/* (non-Javadoc) f_7a) 'V4  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1\TXb!OtL  
*/ kuqf(  
public void sort(int[] data) { PJsiT4<  
int[] temp=new int[data.length]; },e f(  
mergeSort(data,temp,0,data.length-1); s=#3f3  
} CUaI66  
7xz|u\?_2  
private void mergeSort(int[] data,int[] temp,int l,int r){ sJ{NbN~`I  
int mid=(l+r)/2; C1Slx !}  
if(l==r) return ; 3u3(BY{"\F  
mergeSort(data,temp,l,mid); ci <`*>l  
mergeSort(data,temp,mid+1,r); =4 36/O`K  
for(int i=l;i<=r;i++){ sTU`@}}  
temp=data;  =6Ihk  
} 7ae8nZ3&  
int i1=l; t[Xx LG*  
int i2=mid+1; ;gu_/[P  
for(int cur=l;cur<=r;cur++){ &ScADmZP^d  
if(i1==mid+1) oyiEOC  
data[cur]=temp[i2++]; MyXgp>?~T  
else if(i2>r) X~T"n<:a>  
data[cur]=temp[i1++]; Yw vX SA  
else if(temp[i1] data[cur]=temp[i1++]; C2<!.l  
else '!I^Lfz-Z  
data[cur]=temp[i2++]; m\)z& hv<r  
} D4?5 %s  
} M8oI8\6[  
RU|{'zC\v  
} i"p)%q~ z  
TL U^ad#9E  
改进后的归并排序: _p"nR  
hS/oOeG<Y  
package org.rut.util.algorithm.support; 8A~5@  
b7^VWX%  
import org.rut.util.algorithm.SortUtil; J] ^)vxm3  
$*tq$DZ4&  
/** h/j+ b.|  
* @author treeroot PMebn$(  
* @since 2006-2-2 Q-k{Lqa-  
* @version 1.0 mFC0f?nr  
*/ mzLDZ# =b  
public class ImprovedMergeSort implements SortUtil.Sort { I9-vV>:z  
Y9F!HM-`  
private static final int THRESHOLD = 10;  |W];8  
n [H3b}  
/* hiZE8?0+~N  
* (non-Javadoc) eQbDs_  
* q$(@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L1 1/XpR  
*/ (,#Rj$W  
public void sort(int[] data) { '8R5?9"  
int[] temp=new int[data.length]; wuSp+?{5k  
mergeSort(data,temp,0,data.length-1); AL74q[>  
} .H {  
2"*7H S  
private void mergeSort(int[] data, int[] temp, int l, int r) { K+5S7wFDZ  
int i, j, k; po~V{>fUm  
int mid = (l + r) / 2; S-&[Tp+N  
if (l == r) q-P$ \":  
return; uDJi2,|n  
if ((mid - l) >= THRESHOLD) rnz9TmN:*1  
mergeSort(data, temp, l, mid); - |n\  
else .{%~4$yu7  
insertSort(data, l, mid - l + 1); X YO09#>&  
if ((r - mid) > THRESHOLD) &^KmfT5C  
mergeSort(data, temp, mid + 1, r); n>T1KC%  
else 484lB}H  
insertSort(data, mid + 1, r - mid); mojD  
>DeG//rv  
for (i = l; i <= mid; i++) { P$?3\`U;  
temp = data; 20h|e+3  
} (=c R;\s<  
for (j = 1; j <= r - mid; j++) { +`O8cHx  
temp[r - j + 1] = data[j + mid]; :oh(M|;/2  
} u4*7 n-(  
int a = temp[l]; BQq,,i8H  
int b = temp[r]; bU9B2'%E  
for (i = l, j = r, k = l; k <= r; k++) { ;gfY_MXnF  
if (a < b) { JDrh-6Zgj  
data[k] = temp[i++]; RLBjl%Q>  
a = temp; PYX]ld.E  
} else { m22M[L(q  
data[k] = temp[j--]; 28J ; 9  
b = temp[j]; 4)./d2/E  
} x;ym_UZ6e  
} \' (_r  
} {Bk9]:'$5  
H-$)@  
/** y1z<{'2x  
* @param data T|dQY~n~  
* @param l +`4`OVE_#  
* @param i 1sKKmtgH  
*/ b<o Uy  
private void insertSort(int[] data, int start, int len) { ,&[2z!  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d:jD  
}  yG -1g0  
} eq +t%  
} 1~/?W^ir  
} {a -bew  
lIPy)25~  
堆排序: Sp8Xka~5*#  
d1$3~Xl]  
package org.rut.util.algorithm.support; fZ!fwg$  
VU6nu4   
import org.rut.util.algorithm.SortUtil; ^c",!Lp}{  
Mr'P0^^  
/** [!9 dA.tF  
* @author treeroot +NL^/y<;  
* @since 2006-2-2 qd\5S*Z1  
* @version 1.0 Cj^:8 ?%  
*/ )vVt{g  
public class HeapSort implements SortUtil.Sort{ Ln/6]CMl  
>Hb>wlYR  
/* (non-Javadoc) <8#Q5   
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IH|PdVNtg  
*/ )QS4Z{)U  
public void sort(int[] data) { uJ ;7]  
MaxHeap h=new MaxHeap(); 1d)wE4c=Z  
h.init(data); dE R#)bGj  
for(int i=0;i h.remove(); z<2!|  
System.arraycopy(h.queue,1,data,0,data.length); t}r`~AEa!  
} &E|2-)  
gx+bKGB`  
private static class MaxHeap{ wBlfQ w-N  
$U=E7JO  
void init(int[] data){ ZNb;2 4  
this.queue=new int[data.length+1]; <-KHy`u  
for(int i=0;i queue[++size]=data; F&?55@b  
fixUp(size); {B^V_TX2  
} u%n6!Zx  
} 9+<%74|,  
ds@X%L;_  
private int size=0; g=w,*68vuy  
A$*#n8 ,  
private int[] queue; O%RkU?ME  
jSa9UD  
public int get() { TS0x8,'$q  
return queue[1]; X"QIH|qx-  
} 0uX"KL]Elf  
sjh>i>t  
public void remove() { P(OgT/7A  
SortUtil.swap(queue,1,size--); &6!~Q,;K-  
fixDown(1); vd>K=! J  
} |X&.+RI  
file://fixdown hT:+x3  
private void fixDown(int k) { o!.\+[  
int j; 7w}D2|+  
while ((j = k << 1) <= size) { x:'M\c7  
if (j < size %26amp;%26amp; queue[j] j++; ~3k& =3d]  
if (queue[k]>queue[j]) file://不用交换 l|#WQXs*c{  
break; OU)~ 02|\  
SortUtil.swap(queue,j,k); ;A^0="x&  
k = j; jwsl"zL  
} w`Q"mx*  
} !: e(-  
private void fixUp(int k) { c)H (w  
while (k > 1) { 4dy2m!  
int j = k >> 1; a^yBtb~,P  
if (queue[j]>queue[k]) lZT9 SDtS  
break; h{zE;!+)D  
SortUtil.swap(queue,j,k); @\-i3EhR  
k = j; J6x#c`Y  
} yn&AMq ]o  
} Z4YQ5O5  
]3.Un,F  
} Cj~45)r  
v(ABZNIn  
} Q `$Q(/  
 LW?Zd=  
SortUtil: LxqK@Q<B  
,(aOTFQS  
package org.rut.util.algorithm; 7U=|>)Q0s  
G9?6qb:  
import org.rut.util.algorithm.support.BubbleSort; kOfq6[JC  
import org.rut.util.algorithm.support.HeapSort; HI}$Z =C  
import org.rut.util.algorithm.support.ImprovedMergeSort; BR8W8nRb  
import org.rut.util.algorithm.support.ImprovedQuickSort; $HjKELoJ<  
import org.rut.util.algorithm.support.InsertSort; ?Y6MC:l<  
import org.rut.util.algorithm.support.MergeSort; CPRv"T;?  
import org.rut.util.algorithm.support.QuickSort; ,:yv T6)p  
import org.rut.util.algorithm.support.SelectionSort; =n $@  
import org.rut.util.algorithm.support.ShellSort; uP,{yna(  
s|3@\9\  
/** ) V}q7\G~  
* @author treeroot k+k&}8e  
* @since 2006-2-2 $'$#Xn,hU  
* @version 1.0 _4E . P  
*/ W}+f}/&l  
public class SortUtil { =GO/r; 4  
public final static int INSERT = 1; )c9]}:W&  
public final static int BUBBLE = 2; 5 `:+NwXS2  
public final static int SELECTION = 3; U3SF'r8  
public final static int SHELL = 4; ">b~k;M?  
public final static int QUICK = 5; P3[+c4  
public final static int IMPROVED_QUICK = 6; bkmW[w:M  
public final static int MERGE = 7; -VK 6Fq  
public final static int IMPROVED_MERGE = 8; - w41Bvz0  
public final static int HEAP = 9; o`^GUY}  
RG(m:N  
public static void sort(int[] data) { s3m]rC  
sort(data, IMPROVED_QUICK); ?h`Ned0P  
} ?3 :OPP`s  
private static String[] name={ e@k`C{{C]o  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /m,0H)w1  
}; _!FM^N}|  
TmS;ybsG  
private static Sort[] impl=new Sort[]{ aQax85  
new InsertSort(), 7mulNq  
new BubbleSort(), S@suPkQ<>  
new SelectionSort(), wn*z*  
new ShellSort(), x?Wt\<|h!  
new QuickSort(), UN`F|~@v  
new ImprovedQuickSort(), c"ukV_6~J  
new MergeSort(), y^; =+Z  
new ImprovedMergeSort(), ]+\@_1<ZI  
new HeapSort() /BWJ)6#H  
}; MWSx8R)PN  
?f+w:FO  
public static String toString(int algorithm){ G?-27Jk8  
return name[algorithm-1]; U_a)g X  
} 8kZ ~  
&fBLPF%6  
public static void sort(int[] data, int algorithm) { %gd=d0vm  
impl[algorithm-1].sort(data); 5,:tjn  
} !O$*/7  
a!"81*&4#  
public static interface Sort { )c@I|L  
public void sort(int[] data); $[VeZ-  
} DM6oMT  
o/I<)sa  
public static void swap(int[] data, int i, int j) { fShf4G_w\  
int temp = data; ')#E,Y%Hq  
data = data[j]; dfB#+wh  
data[j] = temp; T:0X-U  
} 2G"mm (   
} bhXH<=  
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