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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。 OZY,@c  
插入排序: }x0- V8  
^Xb7[ +I6  
package org.rut.util.algorithm.support; = &wmWy  
hU]HTX'R  
import org.rut.util.algorithm.SortUtil; %V`F!D<D  
/** #H?t!DU  
* @author treeroot !$;a[Te  
* @since 2006-2-2 YgUH'P-  
* @version 1.0 WE6a'  
*/ B/JO~;{  
public class InsertSort implements SortUtil.Sort{ -t2T(ha  
7dG 79H  
/* (non-Javadoc) *OJ/V O  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -|k)tvAm  
*/ Kv'n:z7Md  
public void sort(int[] data) { WtulTAfN  
int temp; [#Lc]$  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); $rF=_D6  
} eN? Y7  
} TL$EV>Nr  
} 7hW+T7u?  
._w8J"E5  
} :<Y}l-x  
J_;N:7'p  
冒泡排序: /M;#_+VK<  
@ V08U!  
package org.rut.util.algorithm.support; H=*5ASc  
4/kv3rv  
import org.rut.util.algorithm.SortUtil; `1*nL,i  
u]NZ`t%AP  
/** =*qD4qYA  
* @author treeroot {rfF'@[  
* @since 2006-2-2 DS-0gVYeDW  
* @version 1.0 ?[<Tx-L  
*/ j"^ +oxH  
public class BubbleSort implements SortUtil.Sort{ }8|[;Qa`y  
/={Js*  
/* (non-Javadoc) Jj~EiA  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X"gCR n%tn  
*/ A[IL H_w  
public void sort(int[] data) { '{ I_\~*  
int temp; XC 7?VE  
for(int i=0;i for(int j=data.length-1;j>i;j--){ TD[EQ  
if(data[j] SortUtil.swap(data,j,j-1); %*aJLn+]_R  
} Jd\apBIf  
} ih,%i4<}6m  
} ah @uUHB  
} bNFLO Q  
taGU  
} g4`Kp; }&'  
|(m oWY=  
选择排序: IK,|5]*Ar  
:j|IP)-f  
package org.rut.util.algorithm.support; 8l}1c=A}Vi  
2!&&|Mh}  
import org.rut.util.algorithm.SortUtil; H>9CW<8  
nJ4@I7Sk;  
/** `Y-|H;z  
* @author treeroot o1&:ry  
* @since 2006-2-2 -<jL~][S  
* @version 1.0 v_e9}yI   
*/ />'V!iWyz  
public class SelectionSort implements SortUtil.Sort { ;.xoN|Per  
|qZko[W}=  
/* 6sIL.S~c)  
* (non-Javadoc) PB%-9C0  
* X[#zCM  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M/x>51<  
*/ ^7;JC7qmN  
public void sort(int[] data) { 3lV^B[$  
int temp; DeR='7n  
for (int i = 0; i < data.length; i++) { PH"hn]  
int lowIndex = i; !D!~ ^\  
for (int j = data.length - 1; j > i; j--) { hA\K</h.  
if (data[j] < data[lowIndex]) { @(P=Eh  
lowIndex = j; !fBF|*/  
} @ '@:sM_  
} gaA<}Tp,  
SortUtil.swap(data,i,lowIndex); s9dO,FMs0t  
} `1{N=!U(&  
} &//wSlL3  
nJPyM/p  
} b jAnaya  
ThPE 0V  
Shell排序: 7+x? " 4  
]9}HEu;1M  
package org.rut.util.algorithm.support; tm7u^9]  
$/6;9d^  
import org.rut.util.algorithm.SortUtil; 2[0JO.K 4  
G'YH6x,  
/** ARcv;H 5  
* @author treeroot w9 w%&{j  
* @since 2006-2-2 JS}{%(B  
* @version 1.0 ih?^t(i  
*/ *'Z B*>  
public class ShellSort implements SortUtil.Sort{ TO%dw^{_`  
hhoEb(BA  
/* (non-Javadoc) f+rz|(6vs{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4f(Kt,0  
*/ V\(:@0"  
public void sort(int[] data) { V]*b4nX7  
for(int i=data.length/2;i>2;i/=2){ u?s VcD[  
for(int j=0;j insertSort(data,j,i); 8M@BG8  
} 0%!rx{f#\  
} RwS@I /  
insertSort(data,0,1); T~h5B(J;  
} JCAq8=zM  
<~ JO s2  
/** 6<K6Y5<6  
* @param data 4v[~r1!V  
* @param j eY{+~|KZ  
* @param i ~=R SKyzt  
*/ > iE!m  
private void insertSort(int[] data, int start, int inc) { ]*7Y~dO  
int temp; EUsI%p  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); G,;,D9jO7  
} vkLC-Mzm<  
} ;[RZ0Uy=  
} lO2[JP  
,lCgQ0}<  
} xkOpa,=FI  
<0S=,!  
快速排序: S*AERm   
T{wuj[ Q#:  
package org.rut.util.algorithm.support; \M'-O YH_[  
)Ud-}* g  
import org.rut.util.algorithm.SortUtil; m7T)m0  
h*ZC*eV>  
/** fib}b? vk  
* @author treeroot 9n}p;3{f  
* @since 2006-2-2 !|c|o*t{  
* @version 1.0 QRLt9L  
*/ OT'[:|x ;  
public class QuickSort implements SortUtil.Sort{ > x IJE2  
tH'2gl   
/* (non-Javadoc) YJ(*wByM  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tpuYiL  
*/ !%dN<%Ah  
public void sort(int[] data) { o:V|:*1Q  
quickSort(data,0,data.length-1); m|OO,gR  
} %X9r_Hx  
private void quickSort(int[] data,int i,int j){ q&:=<+2"  
int pivotIndex=(i+j)/2; _HhbIU  
file://swap " vtCTl~t  
SortUtil.swap(data,pivotIndex,j); .$@R{>%U  
/  g 2b  
int k=partition(data,i-1,j,data[j]); IHRGw  
SortUtil.swap(data,k,j); A<;SnXm  
if((k-i)>1) quickSort(data,i,k-1); %kgkXc~6|x  
if((j-k)>1) quickSort(data,k+1,j); I@\OaUGr+  
}^B6yWUN  
} 9)VF 1LD  
/** aZbw]0q@o  
* @param data l3 DYg  
* @param i }B~If}7  
* @param j +MmHu6"1  
* @return b%cF  
*/ N>>uCkC  
private int partition(int[] data, int l, int r,int pivot) { tDAhyy73  
do{ "fq{Y~F%`  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Fv<`AU  
SortUtil.swap(data,l,r); r1fGJv1!o  
} x`6<m!d`  
while(l SortUtil.swap(data,l,r); ]vuwkn+)  
return l; }<'5 z qS  
} E@Ad'_H  
tnLAJ+ -M  
} F`9]=T0  
$ /nY5[  
改进后的快速排序: 9uWY@zu  
/> 4"~q)  
package org.rut.util.algorithm.support; vB+ '  
Zdn~`Q{  
import org.rut.util.algorithm.SortUtil; Ao/ jt<  
|g *XK6  
/** 4 {9B9={  
* @author treeroot "*})3['n  
* @since 2006-2-2 |hr]>P1  
* @version 1.0 jMpD+Mb  
*/ 0>zbCubPH  
public class ImprovedQuickSort implements SortUtil.Sort { VsA'de!V4[  
U#U]Pt  
private static int MAX_STACK_SIZE=4096; SB)5@ nmS  
private static int THRESHOLD=10; ^i:B+ rl  
/* (non-Javadoc) qpXWi &g  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (dv]=5""  
*/ a5w:u5  
public void sort(int[] data) { ":_vK}5  
int[] stack=new int[MAX_STACK_SIZE]; 2=_g f  
f47M#UC  
int top=-1; $HJwb-I  
int pivot; R"K#7{p9  
int pivotIndex,l,r; GaSPJt   
KgR<E  
stack[++top]=0; 8n>9;D5n  
stack[++top]=data.length-1; im @h -A]0  
L QjsOo  
while(top>0){ /B}lO0]:  
int j=stack[top--]; q/n,,!  
int i=stack[top--]; Z> r^SWL  
E4hLtc^ +  
pivotIndex=(i+j)/2; zk( U8C+  
pivot=data[pivotIndex]; 6&/T@LQYrh  
P+$:(I  
SortUtil.swap(data,pivotIndex,j); QcpXn4/*  
l<);s  
file://partition A,4fEmWM  
l=i-1; p}cw{  
r=j; y '!m4-  
do{ .?l\g-;=  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 8Ac:_Zg  
SortUtil.swap(data,l,r); sM9+dh  
} {D=@n4JO  
while(l SortUtil.swap(data,l,r); f;b[w   
SortUtil.swap(data,l,j); ,N0#!<}4  
/i77  
if((l-i)>THRESHOLD){ tPF.r  
stack[++top]=i; g1( IR)U!z  
stack[++top]=l-1; /E\%>wv  
} [KxF'mz9  
if((j-l)>THRESHOLD){ rEF0oJ.  
stack[++top]=l+1; 7a~X:#  
stack[++top]=j; SCz318n  
} KRA/MQ^7~U  
_F`lq_C  
} bcYF\@};  
file://new InsertSort().sort(data); [1u-Q%?#  
insertSort(data); Gn&4V}F  
} !@v7Zu43,  
/** p3 ^ m9J  
* @param data ynrT a..  
*/ ^U!0-y  
private void insertSort(int[] data) { Er{>p|n =  
int temp; yNTK .  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ej"+:. "\e  
} hq #?kN  
} \o^2y.q:>  
} j*vYBGD  
qo|WXwP2  
} =y-@AU8  
&Udb9  
归并排序: a0#J9O_  
(I./ Uu%  
package org.rut.util.algorithm.support; 1 .6:#  
.;N1N^  
import org.rut.util.algorithm.SortUtil; ( U xW;  
_FWBUZ;N  
/** <Sr  
* @author treeroot [)TRTxFb  
* @since 2006-2-2 .Fp4: e  
* @version 1.0 N}t 2Nu-  
*/ \7'+h5a  
public class MergeSort implements SortUtil.Sort{ 5bg s*.s  
- RU=z!{  
/* (non-Javadoc) ruld B,n  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S@/IQR  
*/ a5 TioQ  
public void sort(int[] data) { ~5oPpTAe  
int[] temp=new int[data.length]; NN?`"Fww  
mergeSort(data,temp,0,data.length-1); gp\<p-}  
} .~7FyLl$  
Kh_Lp$'0uM  
private void mergeSort(int[] data,int[] temp,int l,int r){ 2_Z ? #Y  
int mid=(l+r)/2; 3(,?S$>  
if(l==r) return ; rQ qW_t%  
mergeSort(data,temp,l,mid); w {3<{  
mergeSort(data,temp,mid+1,r); =aTv! 8</  
for(int i=l;i<=r;i++){ 1waTTT?"Ho  
temp=data; L}pt)w*V1j  
} W@I|Q -  
int i1=l; Zo~  
int i2=mid+1; m+T;O/lG0{  
for(int cur=l;cur<=r;cur++){ e-EUf  
if(i1==mid+1) D1=((`v '  
data[cur]=temp[i2++]; mUik A9u5=  
else if(i2>r) Z '7  
data[cur]=temp[i1++]; P`cq H(   
else if(temp[i1] data[cur]=temp[i1++]; ?BZPwGMs  
else TtTj28 k7  
data[cur]=temp[i2++]; j=r P:#  
} @pRlxkvV  
} tu66'z  
*(T:,PY  
} /$p6'1P8  
y#z  
改进后的归并排序: m0a?LY  
(bH`x]h#  
package org.rut.util.algorithm.support; gq'Y!BBQy  
#ZrHsf P  
import org.rut.util.algorithm.SortUtil; ) iN/ua  
YOmM=X+'H  
/** 7Bd-!$j+  
* @author treeroot IHv[v*4:  
* @since 2006-2-2 9^#c| 0T  
* @version 1.0 7%|~>  
*/ J`].:IOh  
public class ImprovedMergeSort implements SortUtil.Sort { oUQ,61H  
^Xq 6:  
private static final int THRESHOLD = 10; %UERc{~o*,  
e9U9Uu[  
/* HOJs[mqB%  
* (non-Javadoc) `3WFjU 5a  
* P"8~$ P#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kr9*,E9cv  
*/ %|q>pin2  
public void sort(int[] data) { oF1,QQ^dg  
int[] temp=new int[data.length]; D!Pq4'd(  
mergeSort(data,temp,0,data.length-1); 0vD7v  
} S]Mw #O|  
ic#`N0s?  
private void mergeSort(int[] data, int[] temp, int l, int r) { VKG&Y_7N  
int i, j, k; ijK"^4i  
int mid = (l + r) / 2; 'R'*kxf  
if (l == r) V8C:"UZ;  
return; pUQ/03dp  
if ((mid - l) >= THRESHOLD) ($;77fPR  
mergeSort(data, temp, l, mid); `-J%pEIza  
else ZJzt~ H  
insertSort(data, l, mid - l + 1); afuOeZP  
if ((r - mid) > THRESHOLD) _ 4U5  
mergeSort(data, temp, mid + 1, r); ?kH8Lw~{5W  
else qh|_W(`y  
insertSort(data, mid + 1, r - mid); xRzFlay8  
1q:2\d]  
for (i = l; i <= mid; i++) { Tz8PSk1[  
temp = data; v50bdj9}k  
} #mCL) [  
for (j = 1; j <= r - mid; j++) { bB1UZ O  
temp[r - j + 1] = data[j + mid]; Vr`R>S,-  
} NflD/q/ L  
int a = temp[l]; \F/hMXDlJ  
int b = temp[r]; x7!L{(E3  
for (i = l, j = r, k = l; k <= r; k++) { %\dz m-d(C  
if (a < b) { <66X Xh.  
data[k] = temp[i++]; 7e|s wJ>4  
a = temp; 0zlb0[  
} else { |@ s,XS  
data[k] = temp[j--]; C.Kh [V\Ut  
b = temp[j]; i]YV {  
} %,}A@H ,  
} 8QLj["   
} C'.L20qW  
Bn#?zI  
/** j7$e28|_n  
* @param data !sQY&*  
* @param l ZojI R\F^  
* @param i ff,pvk8N5  
*/ _VRpI)mu  
private void insertSort(int[] data, int start, int len) { Vt %bI0#  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5HkKurab  
} 5 ZGNz1)?V  
} jjw`Dto&  
} }@'$b<!B  
} ]6(N@RC  
)U7t  
堆排序: a!7A_q8M  
?(D q?-.  
package org.rut.util.algorithm.support; VM GS[qrG  
- D  
import org.rut.util.algorithm.SortUtil; !;Yg/'vD-  
cl=EA6P\X  
/** aQ?/%\>  
* @author treeroot 5\5/  
* @since 2006-2-2 Y)0*b5?1r  
* @version 1.0 DS.RURzd{r  
*/ A}G7l?V&  
public class HeapSort implements SortUtil.Sort{ dMf:h"7  
8<S~Z:JK  
/* (non-Javadoc) lYVz 3p  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4B =7:r  
*/ nm5cpnNl  
public void sort(int[] data) { *4Thd:7 `  
MaxHeap h=new MaxHeap(); ?I_s0k I  
h.init(data); %GjM(;Tk  
for(int i=0;i h.remove(); p{amC ;cI$  
System.arraycopy(h.queue,1,data,0,data.length); =9'RM>  
} 9YIM'q>`v  
:~e>Ob[,"  
private static class MaxHeap{ +Mo9kC  
tZ: _ag)o  
void init(int[] data){ Pk{_(ybaY  
this.queue=new int[data.length+1]; :|V$\!o'U  
for(int i=0;i queue[++size]=data; \HxT@UQ)~  
fixUp(size); ]qethaNy  
} [,t*Pfq'W8  
} gPNZF\ r  
(6?9BlH~  
private int size=0; q>_/u"  
.zA^)qgL  
private int[] queue; twL3\ }N/B  
=x%dNf$e{W  
public int get() { 2h|MXI\g  
return queue[1]; b#uL?f  
} @| M|+k3  
@Lpq~ 1eZB  
public void remove() { \\PjKAsh  
SortUtil.swap(queue,1,size--); $UMFNjL  
fixDown(1); Ygm`ZA y  
} 1-%fo~!l  
file://fixdown a,@]8r-"  
private void fixDown(int k) { >:AARx%  
int j; XX7{-Y y  
while ((j = k << 1) <= size) { {@H6HqD  
if (j < size %26amp;%26amp; queue[j] j++; yzbx .  
if (queue[k]>queue[j]) file://不用交换 CJ/X}hi,  
break; *W4m3Lq  
SortUtil.swap(queue,j,k); 9_# >aOqL  
k = j; 7`- Zuf  
} J`peX0Stl  
} 3 R=,1<  
private void fixUp(int k) { `YFtL  
while (k > 1) { 4x {0iav  
int j = k >> 1; ~bM4[*Q7  
if (queue[j]>queue[k]) oRm L {UDZ  
break; 0LPig[  
SortUtil.swap(queue,j,k); 3QV*%  
k = j; nHnK)9\N  
} A;;fACF8e  
} ciFmaM.  
q!{y&.&\  
} 35Ij ..z0  
|'.*K]Yp  
} 1Ce@*XBU  
yQ_B)b  
SortUtil: r54&XE]O  
!POl;%\  
package org.rut.util.algorithm; Buf/@B7+\  
RY]#<9>M  
import org.rut.util.algorithm.support.BubbleSort; `> 7; !  
import org.rut.util.algorithm.support.HeapSort; chcbd y>C  
import org.rut.util.algorithm.support.ImprovedMergeSort; PXK7b2fE.  
import org.rut.util.algorithm.support.ImprovedQuickSort; 6_J$UBT  
import org.rut.util.algorithm.support.InsertSort; ^Ew]uN>,  
import org.rut.util.algorithm.support.MergeSort; 8UXjm_B^'  
import org.rut.util.algorithm.support.QuickSort; @)UZ@ ~R  
import org.rut.util.algorithm.support.SelectionSort; 8ZM?)# `@{  
import org.rut.util.algorithm.support.ShellSort; 5m*iE*+  
WQ~;;.v#  
/** <Y*+|T+&d  
* @author treeroot :=}US}H$  
* @since 2006-2-2 Upc+Ukw  
* @version 1.0 j>*R]mr6  
*/ k52/w)Ro,$  
public class SortUtil { )bS~1n_0  
public final static int INSERT = 1; wF IegC(  
public final static int BUBBLE = 2; q$ZHd  
public final static int SELECTION = 3; S'|,oUWDb  
public final static int SHELL = 4; ?zeJ#i  
public final static int QUICK = 5; ^WHE$4U`  
public final static int IMPROVED_QUICK = 6; o>).Cj  
public final static int MERGE = 7; @E;=*9ek{u  
public final static int IMPROVED_MERGE = 8; 4iqoR$3Fc  
public final static int HEAP = 9; LIS)(X<]?  
9%8"e>~  
public static void sort(int[] data) { *EOdEFsR/  
sort(data, IMPROVED_QUICK); na#CpS;pc  
} qIVx9jNN  
private static String[] name={ -l`f)0{  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "oTHq]Ku  
}; WB?jRYp  
OP~HdocB  
private static Sort[] impl=new Sort[]{ )T/0S$@  
new InsertSort(), G^~k)6v=m  
new BubbleSort(), x^HGVWw_  
new SelectionSort(), SFB~ ->db  
new ShellSort(), hU(umL<  
new QuickSort(), :V1W/c  
new ImprovedQuickSort(), MC?,UDNd%  
new MergeSort(), "w^!/  
new ImprovedMergeSort(), #D<C )Q  
new HeapSort() ql<i]Y  
}; cWEE%  
XF Patd  
public static String toString(int algorithm){ UM!ENI|  
return name[algorithm-1]; !2 LCLN\  
} EqyeJq .  
@E^~$-J5j  
public static void sort(int[] data, int algorithm) { ~;QvWS  
impl[algorithm-1].sort(data); z8jk[5z  
} 3[\iQ*d }B  
J{l1nHQZSu  
public static interface Sort { )hd@S9Z.Y  
public void sort(int[] data); VCu{&Sh*  
} u6M.'  
g$7{-OpB  
public static void swap(int[] data, int i, int j) { B268e  
int temp = data; $$D}I*^Dt  
data = data[j]; G'rxXJq  
data[j] = temp; VGfMN|h  
} Q~814P8]  
} oeKHqP wg  
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