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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。 3g0[( ;  
插入排序: :l'61$=  
71Q-_Hi  
package org.rut.util.algorithm.support; Z9E[RD  
~bf-uHx  
import org.rut.util.algorithm.SortUtil; =hjff/ X  
/** sy0|=E*;8"  
* @author treeroot Fr`"XH  
* @since 2006-2-2 OB.TAoH:  
* @version 1.0 \U\ W Q  
*/ T/X[q7O~~4  
public class InsertSort implements SortUtil.Sort{ T;-&3  
eR$qw#%c*  
/* (non-Javadoc) rB}Iwp8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Lf4c[[@%gd  
*/ [z'PdYQR/{  
public void sort(int[] data) { wi|'pKG  
int temp; I'Ui` :A  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); -iLp3m<ai  
} -hZlFAZi  
} 9nu!|reS  
} &Egw94l  
\_bk+}WJ]s  
} @!1o +x  
PJ5~,4H-4  
冒泡排序: u!S^lV@  
2f2Vy:&O_  
package org.rut.util.algorithm.support; s{#rCc)  
^`XQ>-wWue  
import org.rut.util.algorithm.SortUtil; 3x@t7B  
omisfu_~E  
/** w~{NN K;"j  
* @author treeroot h mC. 5mY  
* @since 2006-2-2 C2OBgM+  
* @version 1.0 KzZ|{ !C  
*/ HC_+7O3A  
public class BubbleSort implements SortUtil.Sort{ 8b\XC%k  
dT?/9JIv  
/* (non-Javadoc) `@!4#3H  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5 Sm9m*/  
*/ GTgG0Ifeh  
public void sort(int[] data) { 8vpB(VxV+  
int temp; JVy-Y  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ~\B1\ G  
if(data[j] SortUtil.swap(data,j,j-1); I.As{0cc  
} jrJ!A(<)  
} u*u3<YQ  
} 6AD#x7drj  
} `=TV4h4  
P_6JweN  
} fhp\of/@ R  
cih[A2lp  
选择排序: Q"rQVO  
PWUS@I  
package org.rut.util.algorithm.support; zmaf@T  
}ADdKK-  
import org.rut.util.algorithm.SortUtil; .nh }f}j  
36iDiT_  
/** >d2U=Yk!  
* @author treeroot .{r0Szm.  
* @since 2006-2-2 Esx"nex  
* @version 1.0 {HoeK>rd  
*/ YytO*^e}}  
public class SelectionSort implements SortUtil.Sort { m/TjXA8_  
e x" E50  
/* sKD sps^$  
* (non-Javadoc) LkvR]^u0  
* uknX py))  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &gGh%:`B  
*/ ,cj531.  
public void sort(int[] data) { 3'3E:}o|  
int temp; 5jMI33D  
for (int i = 0; i < data.length; i++) { JO3"$s|t  
int lowIndex = i; d!>.$|b  
for (int j = data.length - 1; j > i; j--) { vNo(`~]c  
if (data[j] < data[lowIndex]) { l5; SY  
lowIndex = j; TQ hu$z<  
} .:dy  d  
} R(.5Hs  
SortUtil.swap(data,i,lowIndex); hJ|zX  
} gu:8+/W8L  
} -]hk2Q0  
my1FW,3  
} iG+hj:5  
+hiskV@v  
Shell排序: g_8A1lt  
e97Ll=>  
package org.rut.util.algorithm.support; nev@ykP6  
o,(]w kF  
import org.rut.util.algorithm.SortUtil; V7~tIhuJH  
=o_Ua^mr  
/** ]]"O)tWHj  
* @author treeroot ^qR2!fwm<  
* @since 2006-2-2 ^\"@r%|  
* @version 1.0 ,/%@:Fh4  
*/ SHcFnxEAIH  
public class ShellSort implements SortUtil.Sort{ cJ^{iOQ+  
FUTD/y]Lu  
/* (non-Javadoc) 8_*31Y   
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [T}Lq~  
*/ ]:"<if gp$  
public void sort(int[] data) { LZR x>q^  
for(int i=data.length/2;i>2;i/=2){ fGtYvl O-5  
for(int j=0;j insertSort(data,j,i); ~9ZW~z'  
} "/ 9EUbca  
} Q vc$D{z  
insertSort(data,0,1); rg5ZxN|g  
} =(aA`:Nl  
Sj(5xa[  
/** ]0dj##5tJ  
* @param data :)*+ aS"  
* @param j <y`M Upf]  
* @param i ,;D$d#\"  
*/ %:S4OT8]  
private void insertSort(int[] data, int start, int inc) { ?:woUTyCv  
int temp; mG\$W#+j  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); Py72:;wn  
} -|.Izgc  
} ahoXQ8c:\}  
} D,hZVKa  
'zo] f  
} 4-r5C5o,W  
|&49YQ  
快速排序: :@~W$f\y  
kN~:Bh$  
package org.rut.util.algorithm.support; d}:eLC  
V9:Jz Q=?`  
import org.rut.util.algorithm.SortUtil; ' pN[H\Ia  
Tf*DFyr  
/** 4 AWL::FU5  
* @author treeroot 1SK|4Am  
* @since 2006-2-2 ybY[2g2QJ  
* @version 1.0 _GbwyfA n#  
*/ 3bN]2\   
public class QuickSort implements SortUtil.Sort{ T1~G {@"  
E:$EK_?:t  
/* (non-Javadoc) 1fOH$33  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -s6k't  
*/ 7B@ 1[  
public void sort(int[] data) { 3xX ^pjk  
quickSort(data,0,data.length-1); :5W8S6[o  
} `m")v0n3  
private void quickSort(int[] data,int i,int j){ /$=<"Y7&g  
int pivotIndex=(i+j)/2; Tb!Fv W  
file://swap `qs[a}%'>"  
SortUtil.swap(data,pivotIndex,j); oE.59dx  
,'Sj:l  
int k=partition(data,i-1,j,data[j]); '_~qAx@F#c  
SortUtil.swap(data,k,j); "h`oT4j5q  
if((k-i)>1) quickSort(data,i,k-1); }N0$DqP  
if((j-k)>1) quickSort(data,k+1,j); xQ0.2[*5  
Y n7z#bu  
} r gw@  
/** 1=@csO_yn  
* @param data 2 ":W^P  
* @param i 3 BQZ[%0@  
* @param j ~W..P:wG5  
* @return ks|c'XQb  
*/ ;R[w}#Sm  
private int partition(int[] data, int l, int r,int pivot) { Z<IN>:l  
do{ ]#sF pWI[N  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); pNnZ-R|u  
SortUtil.swap(data,l,r); )45#lE3TH  
} MBn ZO  
while(l SortUtil.swap(data,l,r); GoUsB|-\  
return l; q@=3`yQ  
} e0:[,aF`  
mDdL7I  
} LX8A@Yct  
mMOjV_  
改进后的快速排序:  DJJd_  
MXa(Oi2Gg  
package org.rut.util.algorithm.support;   -]. a0  
Dbg,|UH  
import org.rut.util.algorithm.SortUtil; V'^E'[Dd{  
q|zips,  
/** G%F}H/|R  
* @author treeroot `UD,ne  
* @since 2006-2-2 M* 0zvNg  
* @version 1.0 HT%'dZ1  
*/ <ebC]2j8cK  
public class ImprovedQuickSort implements SortUtil.Sort { *Roqie  
 P y!$r  
private static int MAX_STACK_SIZE=4096; <8iu:nR  
private static int THRESHOLD=10; 5HC5   
/* (non-Javadoc) wLa8&E[  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?#~km0~F)  
*/  /~1Ew  
public void sort(int[] data) { ~ ?JN I8  
int[] stack=new int[MAX_STACK_SIZE]; Dq[Z0"8  
8|) $;.  
int top=-1; N?s`a;Q[=  
int pivot; +mRc8G  
int pivotIndex,l,r; Wl0p-h  
6Z#$(oC  
stack[++top]=0; G0Y]-*1  
stack[++top]=data.length-1; q|ZzGEj:OV  
V\nj7Gr:sF  
while(top>0){ )}$]~ f4R  
int j=stack[top--]; 7h#*dj ef  
int i=stack[top--]; 2DNB?,uP,'  
A}4 ",  
pivotIndex=(i+j)/2; ]o?r( 1  
pivot=data[pivotIndex]; f=hT o!i  
Y !%2vOt  
SortUtil.swap(data,pivotIndex,j); :|%1i>O  
8J)Kn4jq  
file://partition ZJ8"5RW  
l=i-1; }eAV8LU  
r=j; ><xJQeW  
do{ eb>jT:  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); [NoOA  
SortUtil.swap(data,l,r); (Xl+Zi>\{  
} (B0QBDj!  
while(l SortUtil.swap(data,l,r); 9]%2Yb8SC  
SortUtil.swap(data,l,j); 1]a\uq}  
kB9@ &t +  
if((l-i)>THRESHOLD){ 43,baeG  
stack[++top]=i; 7g>|e  
stack[++top]=l-1; h?Lp9VF  
} *. 1S  
if((j-l)>THRESHOLD){ xzXNcQ  
stack[++top]=l+1; zJ30ZY:  
stack[++top]=j; @TJ2 |_s6]  
} 0at['zw  
sSy!mtS  
} }R!t/ 8K  
file://new InsertSort().sort(data); Ou`;HN;[  
insertSort(data); 4I8QM&7  
} wvmcD%   
/** w0X})&,{`m  
* @param data FQ"ED:lks  
*/ 12@Ge]  
private void insertSort(int[] data) { ~gdnD4[G  
int temp; Y|6gg  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); a+^,EY  
} 9@8'*a{`m  
} WP{U9YF2  
} 9aBz%* xo  
Qp9QS yMs}  
} 8ZCR9%  
'Q"Mu  
归并排序: eD|"?@cE  
uD\rmO{  
package org.rut.util.algorithm.support; 3 MCV?"0  
a@ ^)?cH!z  
import org.rut.util.algorithm.SortUtil; biG :Xn  
3BSZz%va  
/** XS$#\UQ  
* @author treeroot :_|Xr'n`A  
* @since 2006-2-2 >8|V[-H  
* @version 1.0 D63?f\  
*/ \M;cF "e-S  
public class MergeSort implements SortUtil.Sort{ qpjiQ,\:b  
O^n\lik  
/* (non-Javadoc) OX7a72z  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 67Ev$a_d"  
*/ D?FmlDTr[  
public void sort(int[] data) { cTQ._|M  
int[] temp=new int[data.length]; ITy/h]0  
mergeSort(data,temp,0,data.length-1); ?pWda<&  
} zY2x_}#Q\"  
i|rCGa0}  
private void mergeSort(int[] data,int[] temp,int l,int r){ \D1@UyE  
int mid=(l+r)/2; DzIV5FG  
if(l==r) return ; 1)3'Y2N*  
mergeSort(data,temp,l,mid); \5-Dp9vG  
mergeSort(data,temp,mid+1,r); E`Br#"/Bl  
for(int i=l;i<=r;i++){ U|<>xe*|%  
temp=data; 7x]q>Y8T  
} -jzoGzC3  
int i1=l; u2OrH3E4E3  
int i2=mid+1; 26p_fKY  
for(int cur=l;cur<=r;cur++){ ?Y 5Vje[^  
if(i1==mid+1) ehLn+tg  
data[cur]=temp[i2++]; J+T tM>  
else if(i2>r) {e1sq^>|  
data[cur]=temp[i1++]; X]D:vuB  
else if(temp[i1] data[cur]=temp[i1++]; C`-CfZZ  
else @; tM R|p  
data[cur]=temp[i2++]; x)pR^t7u8  
} m/q`k  
} \Xe{vlo>h  
r$<M*z5q(\  
} ktkS$  
3:)_oHq  
改进后的归并排序: %)Z,?DzZ  
$rJgBN   
package org.rut.util.algorithm.support; k7& cc|y  
!DUOi4I  
import org.rut.util.algorithm.SortUtil; 3a&HW JBSx  
[{>3"XJ'  
/** FOteN QTj  
* @author treeroot 1SH]$V4C  
* @since 2006-2-2 \;iOQqv0&  
* @version 1.0 p(cnSvg  
*/ E.*gKfL  
public class ImprovedMergeSort implements SortUtil.Sort { BY9Z}/{j  
DXFDs=u  
private static final int THRESHOLD = 10; do9~#F  
v(6[z)A0  
/* qDqy9u:g  
* (non-Javadoc) #guK&?Fye  
* G.$KP  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fQ1Dp  
*/ e}n(mq  
public void sort(int[] data) { mmG]|Cl@  
int[] temp=new int[data.length]; o+L [o_er  
mergeSort(data,temp,0,data.length-1); m2&Vm~Py6b  
} I`s~.fZt  
"3'a.b akw  
private void mergeSort(int[] data, int[] temp, int l, int r) { \qTp#sF  
int i, j, k; `l6OQdB3W  
int mid = (l + r) / 2; 0~P]Fw^w  
if (l == r) ;mg.} fI  
return; ?]aVRmL  
if ((mid - l) >= THRESHOLD)  8hYl73#  
mergeSort(data, temp, l, mid); a^\ F9^j  
else g}IOHE  
insertSort(data, l, mid - l + 1); zl|+YjR  
if ((r - mid) > THRESHOLD) Qn~{TZz  
mergeSort(data, temp, mid + 1, r); \y6Y}Cv  
else ko|M2\  
insertSort(data, mid + 1, r - mid); &gr  T@  
p8"C`bCf  
for (i = l; i <= mid; i++) { cm!|A?-<  
temp = data; eA{A3.f"Hz  
} 72/ bC  
for (j = 1; j <= r - mid; j++) { -8vGvI>  
temp[r - j + 1] = data[j + mid]; Y; iI =U  
} |onLJY7)  
int a = temp[l]; s Ytn'&$\  
int b = temp[r]; 4>2\{0r  
for (i = l, j = r, k = l; k <= r; k++) { |`pBI0Sjo  
if (a < b) { <WnIJum  
data[k] = temp[i++]; #DARZhU)  
a = temp; m%UF{I,  
} else { ^6Zx-Mf\  
data[k] = temp[j--]; wp'[AR}  
b = temp[j]; feH&Ug4?G  
} g-,lY|a  
} -[&Z{1A4x4  
} f,|;eF-Z  
Y^C(<N$  
/** 2 E?]!9T~|  
* @param data OH@gwC  
* @param l 2Nx:Y+[  
* @param i 9P,[MZ  
*/ JG&E"j#q  
private void insertSort(int[] data, int start, int len) { 6`%|-o :  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LpI4R  
} %%I:L~c  
} N"tX K  
}  DZ4gp  
} 9Y2.ob!$}  
/reGT!u  
堆排序: x>,wmk5)  
(kyRx+gA  
package org.rut.util.algorithm.support; dcTZL$  
#xq3 )B  
import org.rut.util.algorithm.SortUtil; VKfpk^rU  
w`r %_o-I  
/** g/WDAO?d  
* @author treeroot ZoYllk   
* @since 2006-2-2 w~+\Mfz  
* @version 1.0 Jr%F#/  
*/ WnU2.:  
public class HeapSort implements SortUtil.Sort{ qrjSG%i~J7  
 j=G  
/* (non-Javadoc) Fe+(+ S  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YMy**  
*/ W#kyD)(F  
public void sort(int[] data) { iQ1[60?)T  
MaxHeap h=new MaxHeap(); Wb#<ctM>  
h.init(data); VC_F Cz  
for(int i=0;i h.remove(); =v!Z8zk=W  
System.arraycopy(h.queue,1,data,0,data.length); 8kr$w$=q  
} 9$qw&j[  
-e?n4YO*\  
private static class MaxHeap{ VKw.g@BY  
?R4u>AHS@  
void init(int[] data){ \zBZ$5 rE  
this.queue=new int[data.length+1]; Jt0/*^'  
for(int i=0;i queue[++size]=data; H6>tto  
fixUp(size); U%Hcc k'  
} nv7)X2jja  
} }sJ}c}b  
m(dW["8D  
private int size=0; fZS'e{V  
R?,v:S&i7;  
private int[] queue; <0m^b#hdG  
>WJQxL4  
public int get() { }6 u)wF5  
return queue[1]; "vkM*HP  
} r+6 DlT a  
@3 +   
public void remove() { q4'`qe  
SortUtil.swap(queue,1,size--); 7l09  
fixDown(1); ^^24a_+2  
} d_f*'M2Gv  
file://fixdown (&V)D?/hS  
private void fixDown(int k) { |Q@(<'8=  
int j; ftRdK>a D  
while ((j = k << 1) <= size) { =Lb(N61  
if (j < size %26amp;%26amp; queue[j] j++; /UY'E<wBx  
if (queue[k]>queue[j]) file://不用交换 BT^=p  
break; nB[B FVkU  
SortUtil.swap(queue,j,k); 0S }\ML  
k = j; 4PR&67|AH_  
} 09 f;z  
} MSp) Jc  
private void fixUp(int k) { F x$W3FIO]  
while (k > 1) { %s5( ''a.  
int j = k >> 1; blP8"(U  
if (queue[j]>queue[k]) NXz/1ut%  
break;  BPKrRex  
SortUtil.swap(queue,j,k); >{A)d<  
k = j; nE0I[T(  
} |%rRALIY  
} xc05GJ  
G=CP17&h6  
} ;NAKU  
jaVx9FR +  
} >}C:EnECy  
1N { >00  
SortUtil: h+cOOm-)  
VP?Q$?a  
package org.rut.util.algorithm; a^X% (@Sg  
Nv=%R  
import org.rut.util.algorithm.support.BubbleSort; y 1Wb/ d  
import org.rut.util.algorithm.support.HeapSort; \q^ dhY>)  
import org.rut.util.algorithm.support.ImprovedMergeSort; 4(Y-TFaf  
import org.rut.util.algorithm.support.ImprovedQuickSort; uKJo5%>  
import org.rut.util.algorithm.support.InsertSort; EpCNp FQT<  
import org.rut.util.algorithm.support.MergeSort; $bBUL C  
import org.rut.util.algorithm.support.QuickSort; CG J_k?h  
import org.rut.util.algorithm.support.SelectionSort; ]n'.}"8Kn  
import org.rut.util.algorithm.support.ShellSort; 1-<?EOYaE  
!wKNYe  
/** ?i!d00X  
* @author treeroot >>;He7  
* @since 2006-2-2 >m=XqtP  
* @version 1.0 v0;dk(  
*/ ]C|xo.=?]  
public class SortUtil { .Rb1%1bdc  
public final static int INSERT = 1; N>g6KgX{K  
public final static int BUBBLE = 2; ;qUd]c9oi  
public final static int SELECTION = 3; 0&Iu+hv  
public final static int SHELL = 4; bHTTxZ-%  
public final static int QUICK = 5; X)c0 y3hk  
public final static int IMPROVED_QUICK = 6; -:Juxh  
public final static int MERGE = 7; 9`@}KnvB?  
public final static int IMPROVED_MERGE = 8; @)z?i  
public final static int HEAP = 9; AvuGAlP  
p}K+4z   
public static void sort(int[] data) { 1p SEr6  
sort(data, IMPROVED_QUICK); a +9_sUq  
} wLg@BSC.  
private static String[] name={ Y]B9*^d<  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q'Y)Y(d  
}; u=#_8e(9Z  
Cs,t:ajP  
private static Sort[] impl=new Sort[]{ v|jwz.jM  
new InsertSort(), [W dxMU  
new BubbleSort(), c.>OpsF  
new SelectionSort(), _PP-'^ U  
new ShellSort(), 8p/&_<mnW  
new QuickSort(), :&RpB^]  
new ImprovedQuickSort(), 6HpiG`  
new MergeSort(), : D !/.0  
new ImprovedMergeSort(), =trLL+vGw'  
new HeapSort() fCv.$5  
}; -9s&OKo`({  
H]M[2C7#N  
public static String toString(int algorithm){ nQfSQMg  
return name[algorithm-1]; ytfr'sr/  
} 9~l8QaK  
xR&Le/3+  
public static void sort(int[] data, int algorithm) { 1nE`Wmo.2  
impl[algorithm-1].sort(data); ,twm)%caU  
} G49`a*Jn  
!4$o*{9Lx:  
public static interface Sort { "T>;wyGW  
public void sort(int[] data); }\W^$e-  
} o'YK\L!p  
quq!Jswn  
public static void swap(int[] data, int i, int j) { 8ROZ]Xh,x  
int temp = data; 1{h,LR  
data = data[j]; }. V!|R,  
data[j] = temp; U-q:Y-h  
} 5j5} c`:  
} Y}r UVn  
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