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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。 s9CmR]C  
插入排序: -"JmQ Fha  
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package org.rut.util.algorithm.support; S%}G 8Ty  
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import org.rut.util.algorithm.SortUtil; K=JDl-#!  
/** ZwLr>?0$ p  
* @author treeroot dt "/4wCO  
* @since 2006-2-2 ,m?V3xvq  
* @version 1.0 $ MH;v_'a  
*/ tyW}=xs  
public class InsertSort implements SortUtil.Sort{ /tj]^QspS  
!"qT2<A  
/* (non-Javadoc) D|)_c1g  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [.xY>\e  
*/ ;BH.,{*@B  
public void sort(int[] data) { P8By~f32_  
int temp; /KOI%x  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); "J+L]IC?AD  
} y@I 9>}"y  
} I]W7FZ=o  
} YAT@xZs-  
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} -+1O*L!  
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冒泡排序: $%DoLpE>  
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package org.rut.util.algorithm.support; J~WT;s  
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import org.rut.util.algorithm.SortUtil; L%Zr3Ct  
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/** X/:V{2  
* @author treeroot Rh~b,"  
* @since 2006-2-2 X\Zan$oi  
* @version 1.0 !;&\n3-W  
*/ ed',\+.uB  
public class BubbleSort implements SortUtil.Sort{ : pUu_  
zCo$YP#5_  
/* (non-Javadoc) vFdI?(c-  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iZfZF  
*/ "*<vE7  
public void sort(int[] data) { d"?"(Q_8n  
int temp; G) KI{D  
for(int i=0;i for(int j=data.length-1;j>i;j--){ Yh1nXkA!V  
if(data[j] SortUtil.swap(data,j,j-1); 2! ,ndLA  
} *Oy* \cX2[  
} 7O*Sg2B  
} ]vf0f,F  
} fK=0?]s}I  
k;cX,*DIn  
} I ]o|mjvs  
.qohHJ&  
选择排序: yW'{Z]09  
P ah@d!%A  
package org.rut.util.algorithm.support; lG0CCOdQ  
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import org.rut.util.algorithm.SortUtil; 98u@X:3  
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/** sjLMM_'  
* @author treeroot ({Md({|  
* @since 2006-2-2 9F 3,  
* @version 1.0 vS~tr sI  
*/ &_:9.I 1  
public class SelectionSort implements SortUtil.Sort { J#Y0R"fo  
H[?S*/n,<  
/* :l]qTCmY  
* (non-Javadoc) AP>n-Z|  
* W"@'}y  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])  q%d'pF  
*/ x f{`uHa8  
public void sort(int[] data) { u `xQC /  
int temp; d.w]\  
for (int i = 0; i < data.length; i++) { Mn&_R{{=  
int lowIndex = i; N,XjZ26  
for (int j = data.length - 1; j > i; j--) { AlDp+"|  
if (data[j] < data[lowIndex]) { pJe!~eyHm  
lowIndex = j; LYYz=oZOE!  
} | X1axRO  
} Y5CkCF  
SortUtil.swap(data,i,lowIndex); CB>W# P%  
} u0+F2+ I  
} $}b)EMMM  
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} l*hWws[  
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Shell排序: \(Nx)F  
cz/ E  
package org.rut.util.algorithm.support; HP*{1Q@5  
xPm{'J+b~  
import org.rut.util.algorithm.SortUtil; +UOVD:G  
s% R,]q  
/** Ms5qQ<0v_  
* @author treeroot S)ipkuj X  
* @since 2006-2-2 w6> P[oW  
* @version 1.0 cX1?4e8  
*/ yy/'B:g  
public class ShellSort implements SortUtil.Sort{ NL|c5y<r  
j|[$P4w}U  
/* (non-Javadoc) 3 []ltN_  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6`'g ${U  
*/ yR{rje*  
public void sort(int[] data) { q0ab]g+  
for(int i=data.length/2;i>2;i/=2){ 56kqG}mg&  
for(int j=0;j insertSort(data,j,i); *wx%jbJo  
} M9fQ,<c<6  
} <%w TI<m,-  
insertSort(data,0,1); rkWy3X{%2<  
} uAnL`  
U:7w8$_  
/** k t!@}QP  
* @param data WQCnkP  
* @param j xv147"w'v  
* @param i E[ -yfP~[  
*/ $; _{|{Yj  
private void insertSort(int[] data, int start, int inc) { uIO?4\s&G  
int temp; P}Mu|AEG  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); tkptm%I _  
} ; m |N 9'  
} "* FjEA6=  
} xa_ IdkV  
89 m.,  
} ]==7P;_-  
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快速排序: $aT '~|?  
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package org.rut.util.algorithm.support; >_]Ov:5  
3:$@DZT$  
import org.rut.util.algorithm.SortUtil; +6+1N)L  
U . <c#S  
/** s H'FqV,)  
* @author treeroot &'/PEOu&}G  
* @since 2006-2-2 O['[_1n_u]  
* @version 1.0 leSBR,C  
*/ sT iFh"8d>  
public class QuickSort implements SortUtil.Sort{ ODpAMt"  
 %>zG;4  
/* (non-Javadoc) @pJ;L1sn  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AGwdM-$iT  
*/ aRn""3[  
public void sort(int[] data) { SMB&sl  
quickSort(data,0,data.length-1); 96!2 @c{  
} "tmu23xQ  
private void quickSort(int[] data,int i,int j){ 1 Cz}|#U  
int pivotIndex=(i+j)/2; $*XTX?,'  
file://swap :SMf (E 5  
SortUtil.swap(data,pivotIndex,j); l%i*.b(  
x>K,{{B)X  
int k=partition(data,i-1,j,data[j]); %qrUP\rn  
SortUtil.swap(data,k,j); rnMi >?  
if((k-i)>1) quickSort(data,i,k-1); "f3mi[  
if((j-k)>1) quickSort(data,k+1,j); A2PeI"y  
h^WMv *2  
} s"tH?m )6  
/** 4/SltWU  
* @param data 3$_- 0>  
* @param i 'wBOnGi6  
* @param j  SBi4i;qD  
* @return ^MhMYA  
*/ i3(5 '  
private int partition(int[] data, int l, int r,int pivot) { $b_~  
do{ G%jV}7h  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ]P^ 3uXi  
SortUtil.swap(data,l,r); ja{x}n*5  
} cqb6]  
while(l SortUtil.swap(data,l,r); "KC3+:tm  
return l; 3][   
} ST0|2)Lh"  
S!R (ae^}  
} ady SwB  
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改进后的快速排序: u VUrg;>  
b!EqYT  
package org.rut.util.algorithm.support; d-8g  
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import org.rut.util.algorithm.SortUtil; >;xkiO>Y  
6UPGE",u  
/** eNFA.*p<  
* @author treeroot W,t`DMC  
* @since 2006-2-2 B SEP*#s  
* @version 1.0 `;Fs  
*/ ZGd7e.u=  
public class ImprovedQuickSort implements SortUtil.Sort { ^h<ElK  
.+ic6  
private static int MAX_STACK_SIZE=4096; 0|rdI,z  
private static int THRESHOLD=10; bh5C  
/* (non-Javadoc) 2m&?t_W  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ojp|/yd^YL  
*/ M!PK3  
public void sort(int[] data) { U}-hV@y  
int[] stack=new int[MAX_STACK_SIZE]; E3_ 5~>  
bde6 ;=oM  
int top=-1; ugW.nf*O  
int pivot; &e4EZ  
int pivotIndex,l,r; {\k:?w4  
MG,?,1_ &  
stack[++top]=0; **n109R  
stack[++top]=data.length-1; \#'m([<e  
niCq`!  
while(top>0){ %bTXu1  
int j=stack[top--]; # 9ZO1\  
int i=stack[top--]; t(- 5l  
tlmfDQD  
pivotIndex=(i+j)/2; :\#/T,K"  
pivot=data[pivotIndex]; wpJfP_H  
pH.&OW%  
SortUtil.swap(data,pivotIndex,j); `lE8dwL  
EMS$?"K  
file://partition S#Pni}JD  
l=i-1; -$j|&l  
r=j; )G$0:-J-  
do{ #xxs^Kbqa#  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); sHMZ'9b  
SortUtil.swap(data,l,r); |uln<nM9  
} h4? 'd+K  
while(l SortUtil.swap(data,l,r); KrD?Z2x  
SortUtil.swap(data,l,j); ^@xn3zJ  
PPj0LFA  
if((l-i)>THRESHOLD){ E`UEl$($  
stack[++top]=i; _i1x\Z~ N  
stack[++top]=l-1; k*= #XbX  
} G(7WUMjl  
if((j-l)>THRESHOLD){ ' sTMUPg`  
stack[++top]=l+1; o[K,(  
stack[++top]=j; 8|\?imOp\[  
} +# tmsv]2  
g=n /w  
} 7-MkfWH2b6  
file://new InsertSort().sort(data); s4{>7`N2  
insertSort(data); SH M@H93  
} wO ?A/s  
/**  $"x~p1P  
* @param data [NIaWI,>  
*/ HFrwf{J  
private void insertSort(int[] data) { l)( 3]  
int temp; G![JRJxQ  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); );5H<[  
} iwT PJGK|  
} L)j<;{J/Q0  
} jr=erVHK  
:Z5Twb3h  
} O0 ,=@nw8.  
6'1m3<G_  
归并排序: %w3"B,k'9D  
l|&DI]gw  
package org.rut.util.algorithm.support; E(G&mfhb  
\J,pV  
import org.rut.util.algorithm.SortUtil; _mn2bc9M  
Ow4H7 sl  
/** P+t`Rw  
* @author treeroot _iZ_.3 Ip  
* @since 2006-2-2 @fG 'X  
* @version 1.0 Z1ZjQt#~+  
*/ r:Rk!z*  
public class MergeSort implements SortUtil.Sort{ wxSJ  
_Kf8,|+  
/* (non-Javadoc) &pZn cm  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M|xs>+r*  
*/ w_]`)$9  
public void sort(int[] data) { `PApmS~} .  
int[] temp=new int[data.length]; 'WQ?%da  
mergeSort(data,temp,0,data.length-1); hO] vy>i;  
} 2\J-7o=P  
A9\(vxxOpC  
private void mergeSort(int[] data,int[] temp,int l,int r){ -oR P ZtW  
int mid=(l+r)/2; A$Ok^  
if(l==r) return ; ,37\8y?o\  
mergeSort(data,temp,l,mid); KoKd.%  
mergeSort(data,temp,mid+1,r); K#!c<Li#  
for(int i=l;i<=r;i++){ `4kVe= {  
temp=data; pW4$$2S?9  
} ap|$8 G  
int i1=l; e'0BP,\f_}  
int i2=mid+1; S@Q4fmH  
for(int cur=l;cur<=r;cur++){ 7/b\NLeJ'  
if(i1==mid+1) {~cM 6W]f  
data[cur]=temp[i2++]; JsD|igqF-  
else if(i2>r) "1HKD  
data[cur]=temp[i1++]; w9]HJ3qi  
else if(temp[i1] data[cur]=temp[i1++]; I)wc&>Lc  
else yeqH eZ  
data[cur]=temp[i2++]; ]CxD m  
} H=v=)cUe[  
} ) o`ep{<t  
!THa?U;  
} S}/5W  
bAS/cuZs  
改进后的归并排序: _`.Wib+  
Q"F" 13  
package org.rut.util.algorithm.support; &5d~ODO  
<@H`5[R  
import org.rut.util.algorithm.SortUtil; X([p0W 9V(  
92XG|CWX  
/** JpE7"Z"~MS  
* @author treeroot SQs+4YJ  
* @since 2006-2-2 y/>IF|aX  
* @version 1.0 N.UeuLz  
*/ 7&&3@96<*#  
public class ImprovedMergeSort implements SortUtil.Sort { g1v=a  
z9Nial`p  
private static final int THRESHOLD = 10; pc2;2^U_  
vR4omB{  
/* sZPyEIXie  
* (non-Javadoc) = P$Q;d  
* OF/hD2V  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t Z@OAPRx  
*/ ~$d(@T&  
public void sort(int[] data) { Pl\NzB,`  
int[] temp=new int[data.length]; d.$0X/0  
mergeSort(data,temp,0,data.length-1); j: E3c\a  
} .<4U2h  
W:>XXUU  
private void mergeSort(int[] data, int[] temp, int l, int r) { ZRj/lQ2D  
int i, j, k; u0F{.fe  
int mid = (l + r) / 2; m:6*4_!  
if (l == r) |[!7^tU*  
return; `Wd4d2aLG  
if ((mid - l) >= THRESHOLD) !v. <H]s)  
mergeSort(data, temp, l, mid); W. BX6  
else $Y M(NC  
insertSort(data, l, mid - l + 1); qSt\ 6~  
if ((r - mid) > THRESHOLD) vj9'5]!~q  
mergeSort(data, temp, mid + 1, r); e$7KMH=  
else Je4hQJ<h  
insertSort(data, mid + 1, r - mid); [>KnMi=o)  
-"rANP-UI  
for (i = l; i <= mid; i++) { 3  $a;  
temp = data; wZVLpF+7  
} Va[t'%~&zR  
for (j = 1; j <= r - mid; j++) { Tvt(nWn(H1  
temp[r - j + 1] = data[j + mid]; o8Yq3N+  
} T: SqENV  
int a = temp[l]; ;3XOk+  
int b = temp[r]; .}Eckqkp  
for (i = l, j = r, k = l; k <= r; k++) { $18?Q+?3  
if (a < b) { wjXv{EsMq  
data[k] = temp[i++]; 6^lix9q7  
a = temp; |w{C!Q8l  
} else { q07H{{h/B  
data[k] = temp[j--]; f@2F!  
b = temp[j]; N:;z~`  
} h>F"GR?U_(  
} p3>Md?e  
} ;iW>i8  
J9MAnYd)i  
/** @}2EEo#  
* @param data v#EFklOP  
* @param l R3>c\mA  
* @param i t37<<5A  
*/ G[6i\Et   
private void insertSort(int[] data, int start, int len) { O`5hj q#  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3 . K #,  
} vqZBDQ0  
} WrS>^\:  
} ?L0|$#Iw  
} z,bK.KFSs  
Z1Qv>@u  
堆排序: "dT"6,  
WZTAXOw  
package org.rut.util.algorithm.support; E]}_hZU  
W23Q>x&S  
import org.rut.util.algorithm.SortUtil; 9kB R/{  
|QD#Dx1_  
/** zXU g(xu  
* @author treeroot bDm7$ (  
* @since 2006-2-2 (>AQ\  
* @version 1.0 r*dNta<  
*/ 3@:O1i  
public class HeapSort implements SortUtil.Sort{ ^!x! F  
Y`#6MhFT7  
/* (non-Javadoc) (#Xs\IEVF  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zd88+GS,#  
*/ |sY  
public void sort(int[] data) { ve:Oe{Ie{  
MaxHeap h=new MaxHeap(); 3=^)=yOd  
h.init(data); !Z 0U_*&  
for(int i=0;i h.remove(); Fq_>}k@fI  
System.arraycopy(h.queue,1,data,0,data.length); tRO=k34  
} \XYidj  
H^54o$5  
private static class MaxHeap{ G0~Z|P  
N&eo;Ti  
void init(int[] data){ U{/fY/kq  
this.queue=new int[data.length+1]; hlZ{bO 'f  
for(int i=0;i queue[++size]=data; !tcz_%  
fixUp(size); n#}~/\P6  
} G.^)5!By  
} 4w#2m>.  
\#WWJh"W  
private int size=0; 9D Nd} rXO  
Kn<+Au_]L  
private int[] queue; c~O Lr  
y:^o ._  
public int get() { '=%`;?j  
return queue[1]; S3i p?9  
} [ZC\8tP`V  
H(tC4'tA  
public void remove() { TET=>6  
SortUtil.swap(queue,1,size--); .@%L8_sMR  
fixDown(1); o ABrhK  
} \HkBp& bqK  
file://fixdown [f! { -T  
private void fixDown(int k) { y.}{KQ"a*  
int j; MG~Z)+g=y  
while ((j = k << 1) <= size) { _p5#`-%mM  
if (j < size %26amp;%26amp; queue[j] j++; *9uNM@7&0  
if (queue[k]>queue[j]) file://不用交换 rMHh!)^#W  
break; M. % p'^5  
SortUtil.swap(queue,j,k); J*MH`;-  
k = j; WcoA)we  
} Yj*T'<e  
} c"-X: m"  
private void fixUp(int k) { ep?D;g  
while (k > 1) { U,Uy0s2r  
int j = k >> 1; yg H)U.  
if (queue[j]>queue[k]) jf`w8*R  
break; rks"y&&Nc  
SortUtil.swap(queue,j,k); r5ldK?=k+*  
k = j; z-b78A/8  
} 4v |i\V>M  
} |aAyWK  S  
[5!}+8]W  
} ~3M8"}X;L  
IN<nZ?D#  
} pe0ax- Zv  
T4Vp0i  
SortUtil: *$|f9jVh  
y< j7iN  
package org.rut.util.algorithm; i!*<LIq  
d~rA`!s7`  
import org.rut.util.algorithm.support.BubbleSort; $[?N^   
import org.rut.util.algorithm.support.HeapSort; bf+C=A)s0  
import org.rut.util.algorithm.support.ImprovedMergeSort; ZD'mwj+K  
import org.rut.util.algorithm.support.ImprovedQuickSort; Y'~O_coG  
import org.rut.util.algorithm.support.InsertSort; H v/5)  
import org.rut.util.algorithm.support.MergeSort; Anu:  
import org.rut.util.algorithm.support.QuickSort; l0`bseN <  
import org.rut.util.algorithm.support.SelectionSort; @vyEN.K%mm  
import org.rut.util.algorithm.support.ShellSort; T9& {s-3*  
>'W,8F  
/** %(p9AE  
* @author treeroot {6h 1  
* @since 2006-2-2 l7jen=(Zb;  
* @version 1.0 2wB *c9~  
*/ }|2A6^FH.  
public class SortUtil { FXDB> }8  
public final static int INSERT = 1; YW6a?f^!  
public final static int BUBBLE = 2; mz%l4w?'  
public final static int SELECTION = 3; \V!{z;.fA  
public final static int SHELL = 4; *cCx]C.~  
public final static int QUICK = 5; 4gC(zJ  
public final static int IMPROVED_QUICK = 6; b way+lh  
public final static int MERGE = 7; HVoP J!K3  
public final static int IMPROVED_MERGE = 8; \By_mw  
public final static int HEAP = 9; aReJ@  
9ghzK?Yc  
public static void sort(int[] data) { XXn3K BIf  
sort(data, IMPROVED_QUICK);  c`\/]  
} p*42 @1,  
private static String[] name={ qQ^CSn98J  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BRM `/s  
}; '_4apyq|  
\1joW#  
private static Sort[] impl=new Sort[]{ FCEmg0qdjD  
new InsertSort(), LH_H yP_  
new BubbleSort(), d3q.i5']G  
new SelectionSort(), Be@g|'r  
new ShellSort(),  %V ]v,  
new QuickSort(), 68h1Wjg:"!  
new ImprovedQuickSort(), y7:f^4  
new MergeSort(), '+{yg+#/wV  
new ImprovedMergeSort(), 6>#8 ^{[  
new HeapSort() R,78}7B  
}; X)hpbHa  
us?q^>u  
public static String toString(int algorithm){ X$ \CC18  
return name[algorithm-1]; *,CJ 3< >  
} %G 2g @2  
0n6eWwY  
public static void sort(int[] data, int algorithm) { kI!@J6  
impl[algorithm-1].sort(data); GB}\7a  
} 1G12FV>M  
i0wBZ i?  
public static interface Sort { &x\)] i2f  
public void sort(int[] data); zLe(#8G  
} go yDG/  
CQ.C{  
public static void swap(int[] data, int i, int j) { v&;JVai  
int temp = data; u(8{5"C  
data = data[j]; }]dzY(   
data[j] = temp; Uaux0W  
} 7J5jf231  
} FO[ s;dmzu  
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