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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。 %U .x9UL  
插入排序: `#r/L@QI  
x>Dix1b:.  
package org.rut.util.algorithm.support; 5p-vSWr !  
+# !?+'A  
import org.rut.util.algorithm.SortUtil; c=a;<,Rzb  
/** : Q2=t!  
* @author treeroot usu{1&g  
* @since 2006-2-2 q[Ey!h)xq  
* @version 1.0 h Y *^rY'  
*/ 6Bd:R}yZP7  
public class InsertSort implements SortUtil.Sort{ 0C"2?etMx  
7|[Dr@.S  
/* (non-Javadoc) +^ |=MK%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XWf1c ~J  
*/ 9Cq"Szs  
public void sort(int[] data) { o[ 4e_ @E  
int temp; %OT?2-d  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); :qK^71gz  
} `"eIzLc%o6  
} `it  
} M tBoX*"  
RJ$x{$r[  
} U^9#uK6GM  
- ]U2G:  
冒泡排序: xn2f!\%p  
mP -Y9*k  
package org.rut.util.algorithm.support; rjwP#  
HH7Bg0=(  
import org.rut.util.algorithm.SortUtil; 'a=QCO 0  
xdrs!GV:  
/**  *#sY-Gd  
* @author treeroot )'axJ  
* @since 2006-2-2 ~x g#6%<=  
* @version 1.0 U#kd cc|  
*/ ^eCMATE  
public class BubbleSort implements SortUtil.Sort{ ?0'db  
#PA 9bM  
/* (non-Javadoc) 7;Vqr$9)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #;s5=aH  
*/ pLsWy&G  
public void sort(int[] data) { pXoT@[}  
int temp; ECLQqjB  
for(int i=0;i for(int j=data.length-1;j>i;j--){ _{y4N0  
if(data[j] SortUtil.swap(data,j,j-1); e<HHgC#J  
} 'E kuCL  
} >1NE6T  
} 1p COLC%1  
} p!H'JNG  
K&TO8   
} '\/|K  
YG#.L}X@C  
选择排序: ac#I $V-  
VK^m]??s_  
package org.rut.util.algorithm.support; rFG_CC2  
;hJz'&UWQ  
import org.rut.util.algorithm.SortUtil; P] qL&_  
\CZD.2p#&  
/** Yjh02wo  
* @author treeroot )o_Pnq9_  
* @since 2006-2-2 1'BC R  
* @version 1.0 `z?h=&N  
*/ 6w4}4i  
public class SelectionSort implements SortUtil.Sort { [F}_Ime  
[IPXU9& Q  
/* Ae_:Kc6  
* (non-Javadoc) ExZ|_7^<  
* +`'>   
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >4]y)df5  
*/ !A&>Eeai  
public void sort(int[] data) { @ACq:+/Q c  
int temp; m"RSDM!  
for (int i = 0; i < data.length; i++) { !6l}s$1i|  
int lowIndex = i; P,={ C6*  
for (int j = data.length - 1; j > i; j--) { ja+PVf  
if (data[j] < data[lowIndex]) { ]r(s02  
lowIndex = j; aW;DfH  
} L_Lhmtm}m  
} @agxu-Y  
SortUtil.swap(data,i,lowIndex); y5`$Aa4~  
} 9; `E,w  
} <@J0 770  
ECr}7R%  
} xpB* > zb  
HAdDr!/`  
Shell排序: V~"-\@  
ID8u&:  
package org.rut.util.algorithm.support; U\x $@J  
6QG"~>v7'(  
import org.rut.util.algorithm.SortUtil; WADAp\&  
){$*<#&H  
/** {&0u:  
* @author treeroot S)=3%toS>  
* @since 2006-2-2 VrnZrQj<  
* @version 1.0 ]lZ g }7h  
*/ l3HfaCP6:  
public class ShellSort implements SortUtil.Sort{ '0 J*9  
V&Q_i E  
/* (non-Javadoc) fO t?2Bh  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U~q2j#pJ  
*/ /uJ(&#87  
public void sort(int[] data) { -X_dY>>s  
for(int i=data.length/2;i>2;i/=2){ 9|qzFmE#  
for(int j=0;j insertSort(data,j,i); nr- 32u  
} AY_GD ^  
} /<T3^/ '  
insertSort(data,0,1); s&F& *5W  
} ';KWHk8C  
_Z_R\  
/** j kV9$W0  
* @param data Y>SpV_H%  
* @param j w5* Z\t5  
* @param i s%i \z }/  
*/ 7&3  
private void insertSort(int[] data, int start, int inc) { H_>9'(  
int temp; |}isSCt  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); 0N`N  
} }}u16x}*n  
} Ff&kK5} q  
} >.&E-1[+:  
XNQPyZ2@|b  
} AfvIzsT0  
\%|%C  
快速排序: G|.6%-  
#&K?N  
package org.rut.util.algorithm.support; Ox9M![fC  
PpezWo)9  
import org.rut.util.algorithm.SortUtil; !Wz4BBU8o  
^5rB/y,  
/** _t?#  
* @author treeroot dry>TXG*  
* @since 2006-2-2 fxknfgbg  
* @version 1.0 UT_kw}1o  
*/ ,ut7`_Fy  
public class QuickSort implements SortUtil.Sort{ #MUY!  
: 22)` ;0  
/* (non-Javadoc) K8RV=3MBLD  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l- $5CO  
*/ U<I]_]  
public void sort(int[] data) { U88gJ[$  
quickSort(data,0,data.length-1); 3@wio[  
} l4*vM  
private void quickSort(int[] data,int i,int j){ *=X61`0  
int pivotIndex=(i+j)/2; 1'f&  
file://swap  xq&r|el  
SortUtil.swap(data,pivotIndex,j); rUh2[z8:  
?10L *PD@  
int k=partition(data,i-1,j,data[j]); W5Vh+'3  
SortUtil.swap(data,k,j); (/KeGgkhv  
if((k-i)>1) quickSort(data,i,k-1); .~X&BY>qP  
if((j-k)>1) quickSort(data,k+1,j); KW(^-:wmr  
.S*VYt%K7  
} <FfmDR  
/** 0( q:K6zI}  
* @param data <b-OdOg  
* @param i |cgc^S/~H  
* @param j {$Z S 2 7  
* @return Tly*i"[&  
*/ DO6 pv  
private int partition(int[] data, int l, int r,int pivot) { 17#t7Yk  
do{ Jk;dtLL}4  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); QXEz  
SortUtil.swap(data,l,r); ~rlPS#]o  
} !GnwE  
while(l SortUtil.swap(data,l,r); 1>L8EImx]V  
return l; Dg*'n  
} QY c/f"9  
mcTC'. 9  
} z||FmL{  
||Vx:(d7D&  
改进后的快速排序: `*3;sq%`  
x27$h)R0v  
package org.rut.util.algorithm.support; ;$3e pP  
XbIxGL  
import org.rut.util.algorithm.SortUtil; `6<Qb=  
X 4\V4_  
/** >dXB)yl  
* @author treeroot T%4yPmY  
* @since 2006-2-2 UJ><B"  
* @version 1.0 o:`^1  
*/ `=%G&_3_<  
public class ImprovedQuickSort implements SortUtil.Sort { 8ib e#jlg  
|? rO  
private static int MAX_STACK_SIZE=4096; g%okYH?  
private static int THRESHOLD=10; >Se-5QtLcf  
/* (non-Javadoc) Kx02 2rgDU  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /0b7"Kr  
*/ j\iNag(   
public void sort(int[] data) { ySHpN>U  
int[] stack=new int[MAX_STACK_SIZE]; ^O<@I  
+V;d^&S  
int top=-1; }=A+W2D  
int pivot; eOahr:Db  
int pivotIndex,l,r; rJ(AO'=  
Vi#[k n'  
stack[++top]=0; wb ^>/  
stack[++top]=data.length-1; \+"Jg/)ij  
5xQ5)B4k  
while(top>0){ ]e$n;tuW  
int j=stack[top--]; 9<.8mW^68  
int i=stack[top--]; ?}HZJ@:lB  
`4wy *!]  
pivotIndex=(i+j)/2; 0-p %.}GE  
pivot=data[pivotIndex]; 5t|$Yt[  
Q)\[wYMt  
SortUtil.swap(data,pivotIndex,j); h{ZK;(u$  
r,q.RWuII  
file://partition Y$_^f*sFn  
l=i-1; ,(f({l[J}  
r=j; 6=96^o*  
do{ !-t"}^)  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); f|Nkk*9$  
SortUtil.swap(data,l,r); q#K0EAgC  
} P MI?PC[;  
while(l SortUtil.swap(data,l,r); O"1HO[  
SortUtil.swap(data,l,j); S[{,+{b0  
qB+OxyT&  
if((l-i)>THRESHOLD){  Q.Y6  
stack[++top]=i; w$j6!z  
stack[++top]=l-1; AoY!f'Z  
} W6):IW(E  
if((j-l)>THRESHOLD){ rNICK2Ah  
stack[++top]=l+1; :;\xyy}A  
stack[++top]=j; Gp=V%w\FDW  
} b>]UNf"-  
tMXNi\Bj  
} ?;A\>sP  
file://new InsertSort().sort(data); GK1P7Qy?V  
insertSort(data); =i6k[rg  
} %vbov}R  
/** _+Z5qUmQ  
* @param data fKO@Qx]  
*/ KN&|&51p}  
private void insertSort(int[] data) { 5Rp mR  
int temp; bK{ VjXF  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); QcX&q%*0  
} Q_dMuoI  
} FGeKhA 8jT  
} "whs?^/  
fcy4?SQ.<i  
} /N,\st  
, eSpt#M  
归并排序: 7jGfQ  
5mZwg(si  
package org.rut.util.algorithm.support; CZ>Ujw=&k  
qRz /$|.  
import org.rut.util.algorithm.SortUtil; nRT ]oAi  
])q,mH  
/** uX%$3k  
* @author treeroot w-C%,1F,/  
* @since 2006-2-2 =E-o@#BS  
* @version 1.0  QB !%  
*/ <U8w#dc  
public class MergeSort implements SortUtil.Sort{ T7o7t5*  
q s:TR  
/* (non-Javadoc) C=2DxdZG  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bf.yA:~U  
*/ 7 0EH~  
public void sort(int[] data) { hZWkw{c  
int[] temp=new int[data.length]; eU.C<Tv:8  
mergeSort(data,temp,0,data.length-1); 2B5Ez,'#x  
} x:h)\%Dg<  
c2L\m*^o  
private void mergeSort(int[] data,int[] temp,int l,int r){ [.6bxK  
int mid=(l+r)/2; B ]sVlbt  
if(l==r) return ; cucT |y  
mergeSort(data,temp,l,mid); PDLps[a  
mergeSort(data,temp,mid+1,r); =5:S"WNj  
for(int i=l;i<=r;i++){ 74&{GCL  
temp=data; "'/+}xM"5  
} aj=-^iGG  
int i1=l; BkY#wJ'  
int i2=mid+1; h iK}&  
for(int cur=l;cur<=r;cur++){ P@% L.y B  
if(i1==mid+1) jy_4W!4a  
data[cur]=temp[i2++]; :Ys ;)W+R  
else if(i2>r) X":2o|R  
data[cur]=temp[i1++]; KTwP.!<v  
else if(temp[i1] data[cur]=temp[i1++]; GkI{7GD:z  
else cob??|,\m  
data[cur]=temp[i2++]; Vv+ oq5hf  
} 8k+k\V{  
} `b%^_@Fb  
#K iqV6E  
} K@Xj)  
87m`K Str7  
改进后的归并排序: Wtp=1  
#%L_wJB-  
package org.rut.util.algorithm.support; o/[Ks;l  
1QnaZhu'  
import org.rut.util.algorithm.SortUtil; ):A.A,skf  
O[z6W.  
/** ` k(Q:  
* @author treeroot ",#Ug"|2  
* @since 2006-2-2 vZs~=nfi#|  
* @version 1.0 jVHS1Vsei  
*/ _>r (T4}]  
public class ImprovedMergeSort implements SortUtil.Sort { jhBfy|Ftu  
*pABdP+  
private static final int THRESHOLD = 10;  Z`|\%D%  
(cV1Pmn  
/* -Owb@Nw  
* (non-Javadoc) P# U|  
* lHHx D  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) px(~ZZB"  
*/ N/<c;"o  
public void sort(int[] data) { _H-Fm$Q  
int[] temp=new int[data.length]; e2 g`T{6M  
mergeSort(data,temp,0,data.length-1); 9[lk=1.qN  
} ^NM>x Ienf  
Xq"Es  
private void mergeSort(int[] data, int[] temp, int l, int r) { c%&*yR  
int i, j, k; ZwiXeD+4  
int mid = (l + r) / 2; <*P)"G  
if (l == r) .ud&$-[a  
return; xsNOjHk  
if ((mid - l) >= THRESHOLD) 3Jq GLR`z3  
mergeSort(data, temp, l, mid); &PFq(4  
else zAev@+.ld  
insertSort(data, l, mid - l + 1); 91DevizXx  
if ((r - mid) > THRESHOLD) WM4,\$  
mergeSort(data, temp, mid + 1, r); m Ph=bG  
else ^+gD;a|t  
insertSort(data, mid + 1, r - mid); : #so"O  
`-K[$V  
for (i = l; i <= mid; i++) { y{~tMpo<  
temp = data; I|;C} lfp  
} W7{^/s5r  
for (j = 1; j <= r - mid; j++) { I1s$\NZ~]  
temp[r - j + 1] = data[j + mid]; lhf5[Rp  
} l)'*jZ  
int a = temp[l]; sE!g!ht  
int b = temp[r]; u yE#EnsH  
for (i = l, j = r, k = l; k <= r; k++) { {XD':2E  
if (a < b) { D=Yr/qc?  
data[k] = temp[i++]; rV?@Kgxi  
a = temp; C)UU/4a;  
} else { 0kw)-)=  
data[k] = temp[j--]; 6$zd2N?  
b = temp[j]; -3 "<znv  
} ^g"p}zf L"  
} Vi0D>4{+  
} 7s;;2<k;_  
7) a f  
/** a:4!z;2 |  
* @param data i CB:p  
* @param l 4Y4zBD=<  
* @param i @RL'pKab9  
*/ 7(P4KvkI  
private void insertSort(int[] data, int start, int len) { ub+XgNO  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G|||.B 8  
} pRUQMPn (  
} 6z:/ma^  
} 73SH[f[g  
} {.DY\;Q  
^+k= ;nl  
堆排序: bqaj~:}@  
H]f[r~  
package org.rut.util.algorithm.support; 8U7d d[  
Lr= ^0  
import org.rut.util.algorithm.SortUtil; )HvB ceN  
h-SKw=n  
/** ;E>#qYC6  
* @author treeroot LB9W.cA   
* @since 2006-2-2 T21?~jS  
* @version 1.0 `0MQL@B  
*/ !| - U,  
public class HeapSort implements SortUtil.Sort{ zJ:%iL@  
xuVc1jJH  
/* (non-Javadoc) 17 0r5  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7#7|+%W0  
*/ x"cB8bZ!$  
public void sort(int[] data) { IYH4@v/#  
MaxHeap h=new MaxHeap(); FJxb!- 0&  
h.init(data); t~44ub6GN`  
for(int i=0;i h.remove(); EWv[Sp  
System.arraycopy(h.queue,1,data,0,data.length); |WfL'_?$  
} <=w!:   
!4 lN[  
private static class MaxHeap{ 4gWlSm)  
Lw1[)Vk}E  
void init(int[] data){ ]1W]  
this.queue=new int[data.length+1]; "<%J^Z9G  
for(int i=0;i queue[++size]=data; U6y`:G;.  
fixUp(size); wfcR[  
} 1?.NJ<)F  
} 6':Egh[;  
w ykaf   
private int size=0; 6UL9+9[C  
z<0/#OP'  
private int[] queue; k `5K&  
/<%L&  
public int get() { SZ7; } r8  
return queue[1]; K@ &;f( Y  
} M-q5Jfm  
rw0s$~'  
public void remove() { .j=mT[N,I  
SortUtil.swap(queue,1,size--); %Y5F@=>&  
fixDown(1); f&RjvVP?s  
} ^62I 5k/u  
file://fixdown <U\8&Uv>  
private void fixDown(int k) { NA`8 ^PZ  
int j; g-NrxyTBlx  
while ((j = k << 1) <= size) { _={mKKoHs  
if (j < size %26amp;%26amp; queue[j] j++; i&DUlmt)f  
if (queue[k]>queue[j]) file://不用交换 ,ei=w,O  
break; T7O)  
SortUtil.swap(queue,j,k); %=\*OIhl  
k = j; e$JATA:j  
} oL<5hN*D  
} _#{qDG=  
private void fixUp(int k) { XdOntP*a  
while (k > 1) { WW!-,d{{@  
int j = k >> 1; Mm9*$g!R  
if (queue[j]>queue[k]) XV`8Vb  
break; ;d]vAj  
SortUtil.swap(queue,j,k); yF|+oTp  
k = j; hJz]N$@W  
} OK47Q{.gh  
} Ai5+ ;8z+  
K\s<<dRa  
} -dfs8[i  
GMoz$c6n_  
} #CB Kt,  
|oe  
SortUtil: <E^;RG  
wx!2/I>  
package org.rut.util.algorithm; 9- 24c  
3a=\$x@  
import org.rut.util.algorithm.support.BubbleSort; LX=v _}l J  
import org.rut.util.algorithm.support.HeapSort; s~ o\j/  
import org.rut.util.algorithm.support.ImprovedMergeSort; 9|OOT[  
import org.rut.util.algorithm.support.ImprovedQuickSort; nQa:t. rC  
import org.rut.util.algorithm.support.InsertSort; YQD/vc~8G  
import org.rut.util.algorithm.support.MergeSort; ~@[<y1g?nG  
import org.rut.util.algorithm.support.QuickSort; @l5GBsLK  
import org.rut.util.algorithm.support.SelectionSort; 9jNh%raG|  
import org.rut.util.algorithm.support.ShellSort; R|wS*xd,  
GJHJ?^%  
/** f;Ijl0d@  
* @author treeroot p1mAoVxR  
* @since 2006-2-2 && PZ;  
* @version 1.0 7  `c!  
*/ YNKvR  
public class SortUtil { y|3("&)"S  
public final static int INSERT = 1; *O)i)["  
public final static int BUBBLE = 2; iWW >]3Q  
public final static int SELECTION = 3; /WK1(B:  
public final static int SHELL = 4; UQ@szE  
public final static int QUICK = 5; &0J8I Cd=  
public final static int IMPROVED_QUICK = 6; 3v`@**  
public final static int MERGE = 7; \YF07L]qs-  
public final static int IMPROVED_MERGE = 8; ,^eOwWV  
public final static int HEAP = 9; ,pQ[e$u1  
7m?fv Ky  
public static void sort(int[] data) { jtE'T}!d  
sort(data, IMPROVED_QUICK); R4$(NNC+/  
} &yOl}?u  
private static String[] name={ T\:*+W37  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &Mt0Qa[  
}; dNov= w  
[6/8O  
private static Sort[] impl=new Sort[]{ x(~V7L>"i  
new InsertSort(), Ap|g[J  
new BubbleSort(), \(`C*d  
new SelectionSort(), L&uPNcZ`-  
new ShellSort(), _?$w8 S%  
new QuickSort(), 0(&Rm R  
new ImprovedQuickSort(), a( N;| <  
new MergeSort(), @uG/2'B(  
new ImprovedMergeSort(), ej=}OH4  
new HeapSort() b5f+q:?{  
}; -mLu!32I<  
roe_H>  
public static String toString(int algorithm){ <yvo<R^30  
return name[algorithm-1]; B[+b%a3  
} u^WZsW  
%|j`;gYV  
public static void sort(int[] data, int algorithm) { MfKru,LSh  
impl[algorithm-1].sort(data); P:1eWP  
} 5~E{bW$  
TB84}  
public static interface Sort { QA)W(1  
public void sort(int[] data); |8GLS4.]t  
} .1ep8O<  
#cb9g   
public static void swap(int[] data, int i, int j) { wjT#D|soI  
int temp = data; r/HG{XH`  
data = data[j]; Ea0EG>Y  
data[j] = temp; y$6EEp  
} Y/pK  
} 1YU?+K  
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