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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>1M$3`E  
插入排序: R,uJK)m  
Wnb)*pPP  
package org.rut.util.algorithm.support; < JGYr 4V  
H+nr5!`kz  
import org.rut.util.algorithm.SortUtil; Z=0iPy,m>  
/** zf}rfn  
* @author treeroot u|(aS^H=q  
* @since 2006-2-2 -=@K %\\~5  
* @version 1.0 (69kvA&|q  
*/ O2/%mFS.  
public class InsertSort implements SortUtil.Sort{ H 3W_}f  
>3v0yh_3  
/* (non-Javadoc) w($XEv;  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KwY`<t1lA;  
*/ $cyLI+uz|  
public void sort(int[] data) { AX/=}G  
int temp; &mCs%l  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); *{HGLl|=  
} *sIi$1vHu  
} hg(KNvl  
} c>M_?::)0  
4mki&\lw`  
} ;]|m((15G  
BASO$?jf4  
冒泡排序: 1 OuSH+  
+SP! R[a  
package org.rut.util.algorithm.support; rjfc.l#v  
7MR:X#2v>  
import org.rut.util.algorithm.SortUtil; :k Rv  
!$g(&  
/** avF&F  
* @author treeroot Rh5@[cg%  
* @since 2006-2-2 h;&&@5@lM  
* @version 1.0 8Ng) )7g!  
*/ 1t!&xvhG  
public class BubbleSort implements SortUtil.Sort{ [R roHXdk+  
h}Fu"zK  
/* (non-Javadoc) :0i#=ODR  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wI|bBfd(  
*/ ZS07_6.~  
public void sort(int[] data) { Rt*-#`I $  
int temp; eW<!^Aer  
for(int i=0;i for(int j=data.length-1;j>i;j--){ +:j4G^V  
if(data[j] SortUtil.swap(data,j,j-1); fo/(()  
} 0b!fWS?,k0  
} \Qe'?LRu{  
} ={e#lC  
} $u/8Rp  
Yqq$kln  
} QSlf=VK*y  
:/I={)5  
选择排序: pP=_@ 3 D  
aTmX!!  
package org.rut.util.algorithm.support; Zb5T90s%  
e!O &~#'h}  
import org.rut.util.algorithm.SortUtil; (cbB %  
$6qR/#74  
/** >EPaZp6  
* @author treeroot i[V,IP +  
* @since 2006-2-2 Iwd"f  
* @version 1.0 IFHgD}kp%#  
*/ wpPxEp/  
public class SelectionSort implements SortUtil.Sort { >B|ofwm*  
+ xkMW%e<  
/* zwF7DnW<<  
* (non-Javadoc) 6"#Tvj~-8  
* y0W`E/1t  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0hEF$d6U  
*/ -M(58/y  
public void sort(int[] data) { >QbI)if`1  
int temp; [bQ8A(u  
for (int i = 0; i < data.length; i++) { ^+YGSg7  
int lowIndex = i; [xH2n\7  
for (int j = data.length - 1; j > i; j--) { IWSEssP  
if (data[j] < data[lowIndex]) { av$\@4I  
lowIndex = j; 2g`uC}  
}  @=^jpSnZ  
} Xlgz.j7XR  
SortUtil.swap(data,i,lowIndex); .-gm"lB  
} WoN]eO  
} B%?|br  
o F,R@f  
} l%3Q=c  
dRarNW  
Shell排序: `\}zm~  
)xXrs^  
package org.rut.util.algorithm.support; ./z"P]$  
*HfW(C$  
import org.rut.util.algorithm.SortUtil; }T&;*ww  
}sm56}_  
/** 3n=cw2FG  
* @author treeroot c'VtRE# z~  
* @since 2006-2-2 p5D3J[?N  
* @version 1.0 yM\tbT/l  
*/ $(!D/bvJ  
public class ShellSort implements SortUtil.Sort{ NC#kI3{  
2R~=@  
/* (non-Javadoc) 0bRkC,N (  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9fk\Ay1P  
*/ knj,[7uh  
public void sort(int[] data) { R _~m\P  
for(int i=data.length/2;i>2;i/=2){ YQw/[  
for(int j=0;j insertSort(data,j,i); `XRb:d^  
} KfN`ZZ<  
} Yqj.z|}Nb  
insertSort(data,0,1); mYU dhL ^  
} [~&:`I1  
tue%L]hc  
/** bU@>1>b6lE  
* @param data RI< Yg#   
* @param j ~P.-3  
* @param i 4h0jX 9  
*/ 88X*:Kf?:  
private void insertSort(int[] data, int start, int inc) { )QJU ]G  
int temp; =iQ`F$M  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); =FC;d[U  
} "#"Fp&Z7  
} e&VR>VJEA  
} 0zk T8'v  
c&iK+qvh{  
} 4FP~+  
AfbA.-  
快速排序: R2Fh^x  
5d>YE  
package org.rut.util.algorithm.support; 3C5D~9v  
sfBjA  
import org.rut.util.algorithm.SortUtil; t.i9!'Y ]  
w[n>4?"{  
/** |<o>$;mZ  
* @author treeroot 8;dbU*  
* @since 2006-2-2 E* DVQ3~  
* @version 1.0 wh[:wE]eX  
*/ @XSu?+s)  
public class QuickSort implements SortUtil.Sort{ =M km:'1r  
'V*M_o(\  
/* (non-Javadoc) dzC&7 9$  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q?'gwH37  
*/ 6 GevO3  
public void sort(int[] data) { YnL?t-$Gg  
quickSort(data,0,data.length-1); SwmPP-n  
} T"0)%k8lJ  
private void quickSort(int[] data,int i,int j){ . I9] `Q  
int pivotIndex=(i+j)/2; M5bj |tQ4  
file://swap 113x9+w[  
SortUtil.swap(data,pivotIndex,j); #j ~FA3O  
jH#^O ;A  
int k=partition(data,i-1,j,data[j]); R5~vmT5W  
SortUtil.swap(data,k,j); ;ZW}47:BS6  
if((k-i)>1) quickSort(data,i,k-1); jgfP|oD  
if((j-k)>1) quickSort(data,k+1,j); "rlSK >`  
R@{/$p:  
} X9BBnZ  
/** U=<.P;+f9  
* @param data -W"0,.Dvg  
* @param i "a_D]D(d5  
* @param j i1H80m s  
* @return QcVtv7+*v  
*/ UK9MWC5g9  
private int partition(int[] data, int l, int r,int pivot) { o[+|n[aT)3  
do{ V5^b6$R@  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); x@R A1&c  
SortUtil.swap(data,l,r); E;Ftop  
} WT? U~.U  
while(l SortUtil.swap(data,l,r); X;a{JjN  
return l; A2FU}Ym0=  
} uEO2,1+  
2n r UE  
} GP k Cgb(  
h[)aRo  
改进后的快速排序: 4 ~|TKd{  
? F), 4Q  
package org.rut.util.algorithm.support; L5P}%1 _  
>WS& w;G  
import org.rut.util.algorithm.SortUtil; wk 7_(gT`0  
FH5bC6  
/** 2A;[Ek6{q  
* @author treeroot sNpBTG@{l  
* @since 2006-2-2 m6ws #%|[  
* @version 1.0 .F$AmVTN  
*/ uM6!RR!~  
public class ImprovedQuickSort implements SortUtil.Sort { uT t:/gm  
FwzA_ nn  
private static int MAX_STACK_SIZE=4096; _+Kt=;Y8  
private static int THRESHOLD=10; 2g8P$+;  
/* (non-Javadoc) $%"}N_M  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N5_.m(:  
*/ wLp t2b8S  
public void sort(int[] data) { Tsp-]-)  
int[] stack=new int[MAX_STACK_SIZE]; sN) .Jo  
PvBbtC-9b  
int top=-1; 3jVm[c5%]  
int pivot; )'CEWc%  
int pivotIndex,l,r; !>);}J!e]  
5K-)X9z?  
stack[++top]=0; *M<=K.*\G  
stack[++top]=data.length-1; ]<?)(xz  
1KR|i"  
while(top>0){ %{_ YJXpO  
int j=stack[top--]; ?B!ZqJ#  
int i=stack[top--]; swgBPJ"?  
{!?RG\EYN  
pivotIndex=(i+j)/2; "8 mulE,  
pivot=data[pivotIndex]; @{a-IW 3  
I*R$*/)  
SortUtil.swap(data,pivotIndex,j); Oydmq,sVe(  
CXFAb1m  
file://partition oVsazYJ|?  
l=i-1; e[dRHl  
r=j; aM}"DY-_ h  
do{ vj$ 6  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); A)\DPLAG  
SortUtil.swap(data,l,r); 0qUap*fvC  
} D8{HOv;d^  
while(l SortUtil.swap(data,l,r); vaZZzv{H  
SortUtil.swap(data,l,j); %$KO]   
L=FvLii.  
if((l-i)>THRESHOLD){ *g6o ;c  
stack[++top]=i; Bb"4^EOZ,  
stack[++top]=l-1; vfDb9QP  
} F}DD;K  
if((j-l)>THRESHOLD){ E\N=p&g$  
stack[++top]=l+1;  (t['  
stack[++top]=j; ,F Vy:"FR  
} W+S; Do  
O; sQPG,v  
} [k}\{i>  
file://new InsertSort().sort(data); }]?G"f t K  
insertSort(data); )eMh,r  
} )fL*Ws6  
/** Y/(-mcR  
* @param data e;[8 GE.   
*/  nGd  
private void insertSort(int[] data) { I@M^Wu]wW  
int temp; dw!Eao47  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); lhj2u]yU0S  
} gI3rF=  
} OFbg]{ub?  
} 9?c^~77  
5/ju it  
} .)zISa*Xy  
2:F  
归并排序: " ?,6{\y,  
hyoZh Y  
package org.rut.util.algorithm.support; `{_PSzM  
Rw 8o]  
import org.rut.util.algorithm.SortUtil; 0M98y!A 5^  
a $%[!vF  
/** loe>"_`Cq  
* @author treeroot lM"7 Z  
* @since 2006-2-2 R  |%  
* @version 1.0 d vxEXy  
*/ nHrCSfK  
public class MergeSort implements SortUtil.Sort{ .x8$PXjPG  
"6QMa,)D  
/* (non-Javadoc) d]`,}vi#E9  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J,Ap9HJt  
*/ `ayc YoD  
public void sort(int[] data) { ! fc)  
int[] temp=new int[data.length]; dhkpkt<G8  
mergeSort(data,temp,0,data.length-1); 4] 1a^@?  
} ii9/ UtIQ  
AMz=HN  
private void mergeSort(int[] data,int[] temp,int l,int r){ W9'jzP  
int mid=(l+r)/2; uJ[Vv4N%9  
if(l==r) return ; G'f"w5%qZv  
mergeSort(data,temp,l,mid); $SR]7GZ  
mergeSort(data,temp,mid+1,r); N2e<Y_T  
for(int i=l;i<=r;i++){ ]SgeZ07  
temp=data; >6+K"J-@  
} 3wl>a#f  
int i1=l; X+8p2xSO|  
int i2=mid+1; /)TEx}wk  
for(int cur=l;cur<=r;cur++){ }}1Q<puM  
if(i1==mid+1) V}-o): dI|  
data[cur]=temp[i2++]; V p{5Kxq  
else if(i2>r) Y_sVe  
data[cur]=temp[i1++]; s3 $Q_8H  
else if(temp[i1] data[cur]=temp[i1++]; R2W_/fsG  
else Q$j48,e  
data[cur]=temp[i2++]; ;$< ek(i7  
} ^ ni_%`Ag  
} 4N j?UDa  
hh&y2#Io  
} 5zOSb$;  
W<o0Z OO  
改进后的归并排序: qH"a!  
-+|[0hpw  
package org.rut.util.algorithm.support; n`xh/vGm#  
E2D8s=r  
import org.rut.util.algorithm.SortUtil; 6QQ oHYtZ  
<vDm(-i3  
/** p]=;t"  
* @author treeroot w}q"y+=Z:  
* @since 2006-2-2 pSFWNWQ'B  
* @version 1.0 caht4N{T  
*/ GY xI$y0:  
public class ImprovedMergeSort implements SortUtil.Sort { =)8fE*[s   
l.l~K%P'h  
private static final int THRESHOLD = 10; /|AuI qW  
e~?]F 0/  
/* J7o?h9  
* (non-Javadoc) wP?q5r5  
* |0p'p$%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #jiqRhm  
*/ yTiqG5r  
public void sort(int[] data) { 89mre;v`  
int[] temp=new int[data.length]; )n@3@NV  
mergeSort(data,temp,0,data.length-1); @un }&URp  
} 2"mj=}y6  
vy2aNUmt  
private void mergeSort(int[] data, int[] temp, int l, int r) { V}+;b bUc-  
int i, j, k; Y'1V(5/&  
int mid = (l + r) / 2; m28w4   
if (l == r) mC(t;{  
return; U:hC! t:  
if ((mid - l) >= THRESHOLD) HH@xn d  
mergeSort(data, temp, l, mid); K9'*q3z  
else 8-YrmP2k  
insertSort(data, l, mid - l + 1); WEAXqDjM  
if ((r - mid) > THRESHOLD) +Ob#3PRy  
mergeSort(data, temp, mid + 1, r); );H[lKy  
else >nEnX  
insertSort(data, mid + 1, r - mid); s;$TX304  
;tiU OixJ  
for (i = l; i <= mid; i++) { ZH_4'm!^g|  
temp = data; :exuTn  
} l}c2l'  
for (j = 1; j <= r - mid; j++) { mXj Ljgc}  
temp[r - j + 1] = data[j + mid]; 5N<v'6&=  
} Z"Ni Y  
int a = temp[l]; i]%"s_l  
int b = temp[r]; olxP`iK  
for (i = l, j = r, k = l; k <= r; k++) { S'p`ECfVMA  
if (a < b) { KBA%  
data[k] = temp[i++]; @A'1D@f#  
a = temp; e/jM+%  
} else { rd4'y~#S  
data[k] = temp[j--]; yt: V+qdv  
b = temp[j]; Uy|=A7Ad c  
} 1R9? [RE  
} -GVG1#5  
} /,$\H  
PGl-2Cr  
/** } /3pC a  
* @param data % ul{nL:  
* @param l z}&C(m:al  
* @param i BM~niW;k  
*/ ^T6!z^g1h  
private void insertSort(int[] data, int start, int len) { FD+PD:cQn  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TFDCo_>o  
} L b;vrh;A  
} wN hR(M7  
} rss.F3dK  
} 1t=X: ]0j  
dU^<7 K:S  
堆排序: ATp  6-  
4 xzJql  
package org.rut.util.algorithm.support; bTp2)a^G  
a;(zH*/XK  
import org.rut.util.algorithm.SortUtil; JMl hBh  
\[I .  
/** $= xQX  
* @author treeroot b7sE  
* @since 2006-2-2 >1I2R/'  
* @version 1.0 (ul-J4E\O  
*/ %kFELtx  
public class HeapSort implements SortUtil.Sort{ 1y-lZ}s_  
aW-o=l@;  
/* (non-Javadoc) EFt`<qwj  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <`UG#6z8  
*/ C_ZD<UPA\  
public void sort(int[] data) { H-KwkH`L4  
MaxHeap h=new MaxHeap(); _D,f 4.R  
h.init(data); ,T*_mDVY  
for(int i=0;i h.remove(); VD3MJ8!w  
System.arraycopy(h.queue,1,data,0,data.length); %7d@+ .  
} 3b\8907  
G_N-}J>EP  
private static class MaxHeap{ 1za'u_  
,xD*^>!  
void init(int[] data){ x$ J.SbW  
this.queue=new int[data.length+1]; *@n3>$  
for(int i=0;i queue[++size]=data; iZ6C8HK&&  
fixUp(size); s_Oh >y?Aq  
} T_tDpq_|  
} f"<@6Axq  
7h#faOP  
private int size=0; 7e{X$'  
SA+%c)j29  
private int[] queue; J$9xC{L4  
AKC foJ  
public int get() { K0RYI69_  
return queue[1]; Dq%r !)  
} Fxth> O`$  
j[J@tM#  
public void remove() { ]{2{:`s  
SortUtil.swap(queue,1,size--); Q] yT  
fixDown(1); 0 ij~e<  
} X$|TN+Ub  
file://fixdown !eAdm  
private void fixDown(int k) { )cqDvH  
int j; avt>saR  
while ((j = k << 1) <= size) { ~{,vg4L  
if (j < size %26amp;%26amp; queue[j] j++; <_a70"i  
if (queue[k]>queue[j]) file://不用交换 fqk Dk  
break; h?3,B0G  
SortUtil.swap(queue,j,k); PUjoi@]  
k = j; Ie&b <k  
} ]pRfY9w  
} E?gu(\an@  
private void fixUp(int k) { 'W?v.W &  
while (k > 1) { VXc+Wm*W  
int j = k >> 1; j*La ,iF  
if (queue[j]>queue[k]) k4F"UG-`  
break; IgiF,{KE,  
SortUtil.swap(queue,j,k); 1u"*09yZd  
k = j; 2~&hstd%  
} /q"d`!h)w  
} AXh3LA  
L740s[,`o#  
} 60aKT:KLC_  
Q f+p0E;  
} }EedHS  
lO2T/1iMTW  
SortUtil: [71#@^ye  
]oas  
package org.rut.util.algorithm; X=p3KzzX  
1ntkM?  
import org.rut.util.algorithm.support.BubbleSort; =2nn "YVP  
import org.rut.util.algorithm.support.HeapSort; #mRFUA  
import org.rut.util.algorithm.support.ImprovedMergeSort; ,bVS.A'o  
import org.rut.util.algorithm.support.ImprovedQuickSort; xjK_zO*dLq  
import org.rut.util.algorithm.support.InsertSort; ^#BGA|j  
import org.rut.util.algorithm.support.MergeSort; c.8((h/  
import org.rut.util.algorithm.support.QuickSort; lsB9;I^+x  
import org.rut.util.algorithm.support.SelectionSort; 1] %W\RHxo  
import org.rut.util.algorithm.support.ShellSort; /K,|k EE'n  
s !hI:$J.  
/** lLkmcHu  
* @author treeroot ||=[kjG~  
* @since 2006-2-2 Wm$`ae   
* @version 1.0 2B9 i R  
*/ ovDJ{3L6O  
public class SortUtil { t8DL9RW'  
public final static int INSERT = 1; 2 ]V>J  
public final static int BUBBLE = 2; LmXF`Y$  
public final static int SELECTION = 3; xMNNXPz(  
public final static int SHELL = 4; vcw>v={x  
public final static int QUICK = 5; +dCDM1{_a  
public final static int IMPROVED_QUICK = 6; xBL$]>  
public final static int MERGE = 7; :>P4L,Da]  
public final static int IMPROVED_MERGE = 8; 8Q^6ibE  
public final static int HEAP = 9; *,W!FxJ  
c/<Sa|'  
public static void sort(int[] data) { 9|N" @0<B  
sort(data, IMPROVED_QUICK); R81{<q'%X  
} 5@+4  
private static String[] name={ =&q-[JW  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" FJ{,=@  
}; v@fe-T&0  
O}K_l1  
private static Sort[] impl=new Sort[]{ -t@y\vZF,  
new InsertSort(), b W=.K>|  
new BubbleSort(), 3!.H^v?  
new SelectionSort(), ':4}O#  
new ShellSort(), +}7Ea:K   
new QuickSort(), >bfYy=/  
new ImprovedQuickSort(), RIy5ww}3|  
new MergeSort(), [lNqT1%]  
new ImprovedMergeSort(), PTbA1.B  
new HeapSort() Pt6hGSo.  
}; EjR_-8@FK  
_{LN{iqDv  
public static String toString(int algorithm){ yn/?= ?0  
return name[algorithm-1]; I*A0?{  
} 3Q'[Ee2-3  
}W:*aU  
public static void sort(int[] data, int algorithm) { HzRX$IKB3(  
impl[algorithm-1].sort(data); ?Oy'awf_  
} E0"10Qbi  
W.,% 0cZ  
public static interface Sort { R^J.?>0  
public void sort(int[] data); ,4^9cFVo  
} Iv$:`7|crX  
q&XCX$N  
public static void swap(int[] data, int i, int j) { 4M @ oj  
int temp = data; ]d@^i)2LF  
data = data[j]; 4F05(R8k  
data[j] = temp; mje<d"bW  
} jM5_8nS&d  
} E rop9T1  
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