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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。 Em&3g  
插入排序: AF#: *<Ev  
w3(G!:  
package org.rut.util.algorithm.support; /FN:yCf  
vE )N6Ss  
import org.rut.util.algorithm.SortUtil; 8~O#@hB~3  
/** I]eeV+U8W  
* @author treeroot x >ah,  
* @since 2006-2-2 P{)D_Bi  
* @version 1.0 g*b`o87PI  
*/ !d()'N  
public class InsertSort implements SortUtil.Sort{ r:V bjmL  
L!xFhVA<  
/* (non-Javadoc) Q(f0S  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5L c@=,/0  
*/ H"/ J R  
public void sort(int[] data) { aaU4Jl?L  
int temp; ]z'L1vQl7  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); :Ob4WU  
} o?}dHTk7  
} T@ESMPeU:X  
} k4$zM/ob  
 d\ #yWY  
} AVjRhe   
9R$$(zB 1;  
冒泡排序: n@+?tYk*e  
.eIs$  
package org.rut.util.algorithm.support; IB# ua:  
"m^gCN}c  
import org.rut.util.algorithm.SortUtil; qe&|6M!  
ynA_Z^j  
/** 75;RAKGi  
* @author treeroot 0\!Bh^++1  
* @since 2006-2-2 i{EQjZ  
* @version 1.0 ]@9W19=P!P  
*/ q* lk9{>  
public class BubbleSort implements SortUtil.Sort{ P\Qvj7_  
YMu#<ZG  
/* (non-Javadoc) c<_1o!68  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h i!K-_Uy  
*/ *66EkCj  
public void sort(int[] data) { a.<XJ\  
int temp; {BlTLAKm  
for(int i=0;i for(int j=data.length-1;j>i;j--){ s7yKx g+`{  
if(data[j] SortUtil.swap(data,j,j-1); !y_L~81?  
} 0z \KI?kd  
} &5K3AL  
} uH$hMg  
} !PoyM[Z"f  
^ q ba<#e  
} iWeUsS%zpV  
5)f 'wVe  
选择排序: LNJKf6:  
$DH/  
package org.rut.util.algorithm.support; 2#$7!`6 K  
*1v3x:pQ'  
import org.rut.util.algorithm.SortUtil; x(u.(:V  
-}TP)/ !,*  
/** [cDDZ+6  
* @author treeroot H$ nzyooh  
* @since 2006-2-2 f ] *w1  
* @version 1.0 @{qcu\sZ  
*/ e6'0g=Y#   
public class SelectionSort implements SortUtil.Sort { e;=R8i  
EUt2 S_2P  
/* z}J~X%}e  
* (non-Javadoc) !Yo2P"  
* ^) s6`:  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vrmMEWPV  
*/ JUw|nUnl?  
public void sort(int[] data) { NUiv"tAY  
int temp; r^.9 |YM5  
for (int i = 0; i < data.length; i++) { 8ZV!ld  
int lowIndex = i; K @&c  
for (int j = data.length - 1; j > i; j--) { VB/75xK_  
if (data[j] < data[lowIndex]) { ~uY5~Qs9G  
lowIndex = j; U !+O+(  
} hFoeVM[h  
} 0o7o;eN  
SortUtil.swap(data,i,lowIndex); -U> )B  
} [i~@X2:Al  
} Z-t qSw8n  
c)Q-yPMl)  
} 6$PQ$  
=^M Q 4  
Shell排序: ?_{{iil  
TQt[he$O  
package org.rut.util.algorithm.support; d^?e*USh  
Se??E+aX  
import org.rut.util.algorithm.SortUtil; 85"Szc-#  
|C./gdq  
/** 7h/Mkim$5  
* @author treeroot d>J +7ex+  
* @since 2006-2-2 umPN=0u6  
* @version 1.0 nUq@`G  
*/ ii`,cJl  
public class ShellSort implements SortUtil.Sort{ -;Mh|!yg  
W"/,<xHuh  
/* (non-Javadoc) #lFsgb  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])  1^hG}#6_  
*/ s;<]gaonB_  
public void sort(int[] data) { Q%'4jn?H  
for(int i=data.length/2;i>2;i/=2){ ;YokPiBy  
for(int j=0;j insertSort(data,j,i); : [?7,/w  
} D@w&[IF  
} /FTP8XHwL)  
insertSort(data,0,1); +tkm,>s  
} #?M[Q:  
I7XM2xM  
/** Y]&2E/oc  
* @param data j5hQ;~Fa|  
* @param j IwXQbJ3v_  
* @param i )q!dMZ(  
*/ vG}\Amx+  
private void insertSort(int[] data, int start, int inc) { sWA-_4  
int temp; 1iqgTi>  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); vEt=enQ  
} pTQ7woj}  
} _NuHz  
} F+zHgE  
qCk`398W  
} IL&R&8'  
=AK6^v&on  
快速排序: Ki :98a$  
OpOR!  
package org.rut.util.algorithm.support; 5 a&a-(  
r,,*kE  
import org.rut.util.algorithm.SortUtil; =;8q`  
4tiCxf)  
/** V,7Xeh(+5L  
* @author treeroot q/7T-"q/G  
* @since 2006-2-2 L{f0r!d|  
* @version 1.0 Ov:U3P?%  
*/ t]t(/x#  
public class QuickSort implements SortUtil.Sort{ ]R"n+LnI:=  
<ihJp^kgQ  
/* (non-Javadoc) BW`Tw^j  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p)7U%NMc(*  
*/ A8nf"mRD:  
public void sort(int[] data) { k~Y_%#_  
quickSort(data,0,data.length-1); mk-L3H1@J3  
} tp V61L   
private void quickSort(int[] data,int i,int j){ cpq0' x\  
int pivotIndex=(i+j)/2; B`%%,SLJ  
file://swap Q `h@-6N  
SortUtil.swap(data,pivotIndex,j); 5zJ#d}%}S"  
[HRP&jr  
int k=partition(data,i-1,j,data[j]); Xs4G#QsA J  
SortUtil.swap(data,k,j); 2c9]Ja3:6  
if((k-i)>1) quickSort(data,i,k-1); q={3fm  
if((j-k)>1) quickSort(data,k+1,j); Gnqun%  
(j)>npOd9  
} <ot%>\C  
/** :;3y^!  
* @param data FbPoyh  
* @param i g3w-Le&T  
* @param j s\ ]Rgi>w  
* @return SP|Dz,o  
*/ V+y:!t`  
private int partition(int[] data, int l, int r,int pivot) { }?d l.=eq  
do{ wGpw+O  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); y?s#pSX;N  
SortUtil.swap(data,l,r); l0wvWv*k  
} f;W>:`'  
while(l SortUtil.swap(data,l,r); ;cZ]^kof  
return l; bJ.68643  
} ps]s Tw  
])T_&%  
} t7 $2/C  
}~Y#N  
改进后的快速排序:  0c:j wtf  
WB|SXto%4D  
package org.rut.util.algorithm.support; 9fb"R"(M  
~F]If\b  
import org.rut.util.algorithm.SortUtil; "j+=py`  
~ @s$  
/** *j|BSd P  
* @author treeroot 8:UV;5@  
* @since 2006-2-2 6n.C!,Zmn  
* @version 1.0 ]?2&d[  
*/ NB/ wJ3 F  
public class ImprovedQuickSort implements SortUtil.Sort { T$xY]hqr  
ki_Py5  
private static int MAX_STACK_SIZE=4096; }"9jCxXL  
private static int THRESHOLD=10; [hXU$Y>"0  
/* (non-Javadoc)  W-U[7n  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H!{Cr#=  
*/ L sMS`o6  
public void sort(int[] data) { @MGc_"b  
int[] stack=new int[MAX_STACK_SIZE]; g~=#8nJ  
I'RhA\`  
int top=-1; R<-(  
int pivot; K5q9u-7  
int pivotIndex,l,r; }3mIj<I1;  
]2B=@V t,  
stack[++top]=0; a?9Ka!O4s  
stack[++top]=data.length-1; >&N8Du*[  
TL_8c][.4$  
while(top>0){ t[cZ|+^]  
int j=stack[top--]; ,U/ZG|=v  
int i=stack[top--]; j'JNQo;q  
ul3._Q   
pivotIndex=(i+j)/2; gnSb)!i>z  
pivot=data[pivotIndex]; Ke+#ww  
\lpR+zaF  
SortUtil.swap(data,pivotIndex,j); |Gh~Zu p  
k@ZmI^  
file://partition sHulaX{  
l=i-1; Y)4&PN~[  
r=j; My!<_Hp-W  
do{ Z:}d\~`x$%  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); cO !2|v8i  
SortUtil.swap(data,l,r); j_*#"}Lcp  
} e|ngnkf(G  
while(l SortUtil.swap(data,l,r); x5}Ru0Z  
SortUtil.swap(data,l,j); m48m5>  
6muZE1sn  
if((l-i)>THRESHOLD){ ,.<l^sj5  
stack[++top]=i; ;M"JN:J8  
stack[++top]=l-1; 8wqHr@}p  
} sP5\R#  
if((j-l)>THRESHOLD){ QGnBNsAh  
stack[++top]=l+1; ajz%3/R  
stack[++top]=j; &iDX+*(  
} jDO[u!J6.%  
H-o>| C  
} *:3`$`\54  
file://new InsertSort().sort(data); ( XoL,lJ  
insertSort(data); RcH",*U  
} N&t+*kF_  
/** H)5v X+9D  
* @param data rOu7r4  
*/ bytAdS$3  
private void insertSort(int[] data) { SXA_P{j&a  
int temp; ^H1B 62_  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); F+!K9(`|  
} +,"/z\QO  
} P'6eK?  
} 4b B)t#  
kN*,3)T;}  
} J!,<NlP0K  
-%lA=pS{Fq  
归并排序: Rb~NX  
Vn-y<*np  
package org.rut.util.algorithm.support; ;V~[kF=t0  
c _li.]P  
import org.rut.util.algorithm.SortUtil; 0a??8?Q1G  
Q9 b.]W  
/** E1'HdOh&z  
* @author treeroot j ,' $i[F'  
* @since 2006-2-2 Eh)PZvH  
* @version 1.0 |P si?'4  
*/ h7|#7 d  
public class MergeSort implements SortUtil.Sort{ )8:Ltn%  
 cf#2Wg)  
/* (non-Javadoc) +KV`+zic+  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J?~El&  
*/ XP"lqyAi  
public void sort(int[] data) { =r=YV-D.  
int[] temp=new int[data.length]; <T[ wZ[l  
mergeSort(data,temp,0,data.length-1); I]|X6  
} FDA``H~  
)Fh+6  
private void mergeSort(int[] data,int[] temp,int l,int r){ )V<ML7_?  
int mid=(l+r)/2; |<l  sv  
if(l==r) return ; %o4ZD7@ '  
mergeSort(data,temp,l,mid); OsMU>v }m  
mergeSort(data,temp,mid+1,r); \s8j*  
for(int i=l;i<=r;i++){ 0?KY9  
temp=data; T\VKNEBo  
} xG JX~)  
int i1=l; GRK+/1C  
int i2=mid+1; /d*0+m8  
for(int cur=l;cur<=r;cur++){ F/FUKXxx  
if(i1==mid+1) I5l5fx  
data[cur]=temp[i2++]; 'a`cK;X9F  
else if(i2>r) YQWGv,47\  
data[cur]=temp[i1++]; g?.ls{H  
else if(temp[i1] data[cur]=temp[i1++]; 3?F*|E_  
else XjL)WgQ{i  
data[cur]=temp[i2++]; dBKL_'@@}  
} pPSmSWD?  
} Lj"@JF;c  
*"\QR>n   
} ]uN}n;`12  
Fy^=LrH=D  
改进后的归并排序: LE!xj 0  
Tji G!W8  
package org.rut.util.algorithm.support; UMN3.-4K#  
YL_M=h>P  
import org.rut.util.algorithm.SortUtil; #d,+87]\=  
,iKL 68  
/** 18ApHp  
* @author treeroot 8LI,'XZ  
* @since 2006-2-2 Y[l*>}:w  
* @version 1.0 WdEVT,jjh  
*/ 7JvBzD42  
public class ImprovedMergeSort implements SortUtil.Sort { %l4LX~-:  
kcg{z8cd'r  
private static final int THRESHOLD = 10; /a}F ;^  
e5/f%4YX  
/* w\o?p.drp=  
* (non-Javadoc) )YE3n-~7{  
* !2-f%x]tO  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _?"P<3/iF  
*/ ^=f<WKn  
public void sort(int[] data) { WC6yQSnY&  
int[] temp=new int[data.length]; I d6H~;  
mergeSort(data,temp,0,data.length-1); F7!g+LPc<  
} ,Jm2|WKH  
-][~_Hd{  
private void mergeSort(int[] data, int[] temp, int l, int r) { SvZ~xTit  
int i, j, k; eD4D<\*  
int mid = (l + r) / 2; ws1io.  
if (l == r) l`S2bb6uMR  
return; ;L1Q"Hxh  
if ((mid - l) >= THRESHOLD) 37OU  
mergeSort(data, temp, l, mid); }H^h ~E  
else dwd5P7  
insertSort(data, l, mid - l + 1); <$6r1y*G  
if ((r - mid) > THRESHOLD) {k CCpU  
mergeSort(data, temp, mid + 1, r); a_jw4"Sb  
else |\/`YRg>  
insertSort(data, mid + 1, r - mid); s!WGs_1@  
BvQMq5&  
for (i = l; i <= mid; i++) { 1b^e4  
temp = data; _{Q)5ooP  
} #0HZ"n  
for (j = 1; j <= r - mid; j++) { S T#9auw  
temp[r - j + 1] = data[j + mid]; ,X+LJe$  
} _yH{LUIj  
int a = temp[l]; =E6ND8l@2  
int b = temp[r]; +,7nsWV  
for (i = l, j = r, k = l; k <= r; k++) { yx0wR  
if (a < b) { PIk2mX/D_6  
data[k] = temp[i++]; in-|",O`Z  
a = temp; tu5g> qb  
} else { " pg5w  
data[k] = temp[j--]; > 2)@(f~g  
b = temp[j]; 9:DT+^BB  
} 3K;V3pJ].  
} Db:^Omw o  
} 73Zx`00  
JWZG)I]r  
/** =VC"X?N  
* @param data V{jQ=<)@e  
* @param l JRti2Mu  
* @param i R[#Np`z  
*/ z) :LF<  
private void insertSort(int[] data, int start, int len) { b/[$bZD5o  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v2w|?26Lf  
} eILdq*  
} t QR qQ  
} hn`yc7<}(u  
} %mqep5n(  
'80mhrEutG  
堆排序: wh Hp}r  
%#go9H(K  
package org.rut.util.algorithm.support; _HMQx_e0YM  
k)j6rU  
import org.rut.util.algorithm.SortUtil; ={'3j  
-!@]z2uU  
/** p!oO}gE  
* @author treeroot 0P_=Oy"l-  
* @since 2006-2-2 /penB[ 1i  
* @version 1.0 7)RDu,fx  
*/ \wZ 4enm  
public class HeapSort implements SortUtil.Sort{ ~,^pya  
V;pR w`  
/* (non-Javadoc) 1tZ7%0R\g]  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X%C`('"R  
*/ 7sX#6`t  
public void sort(int[] data) { CMhl*dH  
MaxHeap h=new MaxHeap(); *A&A V||q  
h.init(data); PF+F^;C  
for(int i=0;i h.remove(); wI5(`_l{G  
System.arraycopy(h.queue,1,data,0,data.length); ahh&h1q7|  
} Oj=g;iY  
wZUZ"Y}9  
private static class MaxHeap{ $.Ia;YBf  
eoj(zY3  
void init(int[] data){ D6I-:{ws  
this.queue=new int[data.length+1]; m|uVmg!*  
for(int i=0;i queue[++size]=data; HfOaJ'+e<  
fixUp(size); YD9|2S!G  
} 7v']wA r]  
} Wq2 Bo*[*  
~|Nj+A  
private int size=0; 2%?Kc]JY9  
$x~U&a  
private int[] queue; 7+NBcZuG9  
@ ^q}.u`  
public int get() { WJlJD*3  
return queue[1]; 7_9^nDU  
} r@t \a+  
2tw3 =)  
public void remove() { 9]L4`.HM  
SortUtil.swap(queue,1,size--); o[aP+O Md  
fixDown(1); 9oj#5Hq  
} 9GX'+$R]  
file://fixdown oA*88c+{f  
private void fixDown(int k) { A(D>Zh6o@  
int j; u?4d<%5R!  
while ((j = k << 1) <= size) { @?n~v^  
if (j < size %26amp;%26amp; queue[j] j++; r1&eA%eh  
if (queue[k]>queue[j]) file://不用交换 {i<L<Y(3  
break; |4C5;"Pc  
SortUtil.swap(queue,j,k); <YM!K8hu$  
k = j; P<CPA7K  
} %jo,Gv  
} 3,"G!0 y.  
private void fixUp(int k) { )%JjV(:  
while (k > 1) { HIq e~Vc  
int j = k >> 1; fKbg?  
if (queue[j]>queue[k]) j6d{r\!$4  
break; 5yL\@7u`  
SortUtil.swap(queue,j,k); 03n+kh  
k = j; {^.q6,l  
} r,<p#4(>_  
} W5uC5C*,l  
bXz*g`=;  
} _<6E>"*m  
`l'Ine 11  
} QQ/9ZI5  
(kVxa8 0  
SortUtil: kr\#CW0?  
Bdcs}Ga  
package org.rut.util.algorithm; I{$TMkh[  
I.gF38Mx  
import org.rut.util.algorithm.support.BubbleSort; Ub{7Xk n  
import org.rut.util.algorithm.support.HeapSort; Y1;jRIOA  
import org.rut.util.algorithm.support.ImprovedMergeSort; {(IHHA>  
import org.rut.util.algorithm.support.ImprovedQuickSort; 3V]08  
import org.rut.util.algorithm.support.InsertSort; )b~+\xL5J  
import org.rut.util.algorithm.support.MergeSort; hZ|8mV  
import org.rut.util.algorithm.support.QuickSort; % kaV ?j  
import org.rut.util.algorithm.support.SelectionSort; M_O)w^ '  
import org.rut.util.algorithm.support.ShellSort; ~#dfZa&   
{t*CSI  
/** $3S`A]xO  
* @author treeroot 9T\\hM)k  
* @since 2006-2-2 !S'!oinV  
* @version 1.0 8{ +KNqz  
*/ z:8ieJ)C  
public class SortUtil { o?d`o$  
public final static int INSERT = 1; L@S1C=-/  
public final static int BUBBLE = 2; R].xT-1  
public final static int SELECTION = 3; @d n& M9Z  
public final static int SHELL = 4; BS2'BS8  
public final static int QUICK = 5; 6"9(ce KX  
public final static int IMPROVED_QUICK = 6; K}DrJ/s  
public final static int MERGE = 7; ,:{+-v(  
public final static int IMPROVED_MERGE = 8; mLV0J '  
public final static int HEAP = 9; (~NR."s;  
OD~yIV  
public static void sort(int[] data) { dn&4 84  
sort(data, IMPROVED_QUICK); oT!i}TW?o  
} 3fUiYI|&7  
private static String[] name={ ~ Zw37C9J  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !iL6/  
}; y[/:?O}g4  
<OrQbrWQa  
private static Sort[] impl=new Sort[]{ h %5keiA  
new InsertSort(), 5S ) N&%  
new BubbleSort(), zCS&w ~  
new SelectionSort(), F9>"1  
new ShellSort(), 4,&f#=Y  
new QuickSort(), '(zP;  
new ImprovedQuickSort(), 09=w  
new MergeSort(), _U o3_us  
new ImprovedMergeSort(), ltv ~Kh  
new HeapSort() ctPT=i60  
}; &"=O!t2  
/ <+F/R'=O  
public static String toString(int algorithm){ }&]T0U`@  
return name[algorithm-1]; tlYB'8bJY  
} {Q)sR*d  
W!|l_/L'   
public static void sort(int[] data, int algorithm) { sT,*<^  
impl[algorithm-1].sort(data); L=5Y^f'aU  
} a{Y8 hR  
Rl (+TE  
public static interface Sort { /2cn`dR,  
public void sort(int[] data); }%c0EY'  
} &w{z  
"$3~):o  
public static void swap(int[] data, int i, int j) { B}@CtVWFz  
int temp = data; {rzQ[_)EC  
data = data[j]; x=N0H  
data[j] = temp; TpYdIt9#>  
} T#KVN{O  
} ~ymSsoD^  
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