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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。 x{S2   
插入排序: ;)z+dd#3  
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package org.rut.util.algorithm.support; p21li}Iu  
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import org.rut.util.algorithm.SortUtil; Qp+M5_  
/** )H+p6<  
* @author treeroot W4=A.2[q  
* @since 2006-2-2 JhvT+"~  
* @version 1.0  tk+4noA  
*/ Zou;o9Ww  
public class InsertSort implements SortUtil.Sort{ a~Yq0d?`D  
lQpl8>  
/* (non-Javadoc) D&1(qi=x&  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vw :&c.zd  
*/ !ezy  v`  
public void sort(int[] data) { Ks-$([_F   
int temp; n$<n Yr`X  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 6foiN W+  
} *RFBLCt  
} r-,u)zf"  
} *9 (E0"  
r |2{( +  
} c"P:p%\m&u  
@4$la'XSx  
冒泡排序: 8Fv4\dr  
gdS@NUM  
package org.rut.util.algorithm.support; Wm/0Pi  
XRi37|p  
import org.rut.util.algorithm.SortUtil; XQZiJ %'  
c| X }[  
/** =oTj3+7  
* @author treeroot fDAT#nlyp  
* @since 2006-2-2 C)ic;!$Qhb  
* @version 1.0 V6_~"pRR=  
*/ L&&AK`Ur3l  
public class BubbleSort implements SortUtil.Sort{ w`[`:H_z  
5 Q,j+  
/* (non-Javadoc) 9>;CvR  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }j{Z &(K  
*/ "p[3^<~uQ  
public void sort(int[] data) { Y)7\h:LIg  
int temp; 'q l<R0g  
for(int i=0;i for(int j=data.length-1;j>i;j--){ XW:%YTv  
if(data[j] SortUtil.swap(data,j,j-1); BOv^L?)*Z  
} = VMELk!z  
} zN/nKj: Q  
} p ^Y2A  
} b1yS1i D  
GjbOc   
} Kf`/ Gc!  
rLA^ &P:  
选择排序: L$ZsNs+  
rq:sy=;  
package org.rut.util.algorithm.support; `:Zgq+j&  
3|D.r-Q  
import org.rut.util.algorithm.SortUtil; Pb<6-Jc[  
on 4 $n7  
/** iB+ _+A  
* @author treeroot @>+`1C  
* @since 2006-2-2 -`5L;cxwk4  
* @version 1.0 XI"IEwB  
*/ L$^)QxH7  
public class SelectionSort implements SortUtil.Sort { >J{e_C2ZS  
hHgH'  
/* rVwW%&  
* (non-Javadoc) @/xdWN!,  
* tv5N wM  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wpt5'|I  
*/ #I#_gjJkx  
public void sort(int[] data) { +1c[!;'  
int temp; H=9{|%iS  
for (int i = 0; i < data.length; i++) { 8F/zrPG  
int lowIndex = i; |][PbN D  
for (int j = data.length - 1; j > i; j--) { XpPcQIM*  
if (data[j] < data[lowIndex]) { -/_hO$|W  
lowIndex = j; cbW=kQc_  
} qNUd "%S  
} VH] <o0  
SortUtil.swap(data,i,lowIndex); O6ltGtF  
} JY%l1:}G3  
} ? 3oUkGfn  
J)sOne  
} AvB21~t&]  
.e\PCf9v  
Shell排序: lDVgW}o@  
^G "Qp8 "  
package org.rut.util.algorithm.support;  p4P"U  
MR zY<MD  
import org.rut.util.algorithm.SortUtil; [K1z/ea)V  
/a s+ TU`A  
/** rd,!-w5  
* @author treeroot )"%J~:`h}  
* @since 2006-2-2 **c"}S6:mC  
* @version 1.0 <ka zV<"  
*/ xPJ @!ks9  
public class ShellSort implements SortUtil.Sort{ 10_>EY`  
OX[r\  
/* (non-Javadoc) Ct$\!|aR  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;aH3{TS  
*/ 2#Qw  
public void sort(int[] data) { W+Ou%uv}S  
for(int i=data.length/2;i>2;i/=2){ TRr%]qd{Hr  
for(int j=0;j insertSort(data,j,i); e@PY(#ru  
} [_*?~  
} l0E]#ra"  
insertSort(data,0,1); A2.4#Qb'  
} fsWPU]\)  
4D6LP*  
/** Gsy'':u  
* @param data ^~s!*T)\  
* @param j H-eHX3c7  
* @param i NleMZ  
*/ 9 $^b^It  
private void insertSort(int[] data, int start, int inc) { eL [.;_  
int temp; $)6x3&]P  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ITD&w g  
} L#fK ,r8  
} vZPBjloT!.  
} C%#u2C2  
W)L*zVj~  
} pz"}o#R"x  
- x;xQ  
快速排序: ViU5l*n;  
<:!:7  
package org.rut.util.algorithm.support; PmtXD6p3(  
Lc(eY{CY  
import org.rut.util.algorithm.SortUtil; yoM^6o^,D  
M3eFG@,  
/** Yi <1z:\  
* @author treeroot (^58$IW71  
* @since 2006-2-2 N9~'\O$'7  
* @version 1.0 x#hSN|'"  
*/ s\ Ln  
public class QuickSort implements SortUtil.Sort{ /Eu|Jg=I  
>uFFTik  
/* (non-Javadoc)  p+-IvU  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K1p.{  
*/ :mt<]Oy3  
public void sort(int[] data) { i"mQ  
quickSort(data,0,data.length-1); sAnb   
} s%G%s,d  
private void quickSort(int[] data,int i,int j){ &d]@$4u$;  
int pivotIndex=(i+j)/2; V?~!Dp  
file://swap |Z8Eu0RSb  
SortUtil.swap(data,pivotIndex,j); (IIZvCek  
`chD*@76I  
int k=partition(data,i-1,j,data[j]); =&m;5R  
SortUtil.swap(data,k,j); [EK@f,iM  
if((k-i)>1) quickSort(data,i,k-1); ER;\Aes*?  
if((j-k)>1) quickSort(data,k+1,j); @Thrizh  
i/ PL!'oq  
} r(rT.D&  
/** BE!l{  
* @param data Ql"~ z^L  
* @param i *a-KQw  
* @param j \5j#ad  
* @return #$l:%  
*/ -] G=Q1 1  
private int partition(int[] data, int l, int r,int pivot) { X2{Aa T*M  
do{ c GyBml1  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); *d31fBCk%  
SortUtil.swap(data,l,r); >u]9(o7I  
} /x\~ 5cC  
while(l SortUtil.swap(data,l,r); V5gr-^E  
return l; _>_ "cKS  
} 6NQ`IC  
@h(Z;  
} bk]g}s  
E`]un.  
改进后的快速排序: 7Dw. 9EQ  
SAE'y2B*  
package org.rut.util.algorithm.support; z'\BZ5riX<  
l nJ  
import org.rut.util.algorithm.SortUtil; ]l`V#Rd  
>O0<u  
/** ,[3}t%Da  
* @author treeroot fP 3t0cp  
* @since 2006-2-2 PJ,G_+b!  
* @version 1.0 (-VH=,Md  
*/ dJ>tM'G  
public class ImprovedQuickSort implements SortUtil.Sort { 8!MVDp[|"  
OHv9|&Tpl  
private static int MAX_STACK_SIZE=4096; V6B[eV$D  
private static int THRESHOLD=10; %g69kizoWi  
/* (non-Javadoc) 0a1Mu>P,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0v``4z2Z  
*/ P G zwS  
public void sort(int[] data) { I:1Pz|$`  
int[] stack=new int[MAX_STACK_SIZE]; xpI8QV$#  
qHPinxewx  
int top=-1; (3=bKcD'  
int pivot; I1JL`\;4  
int pivotIndex,l,r; =L`PP>"rW  
5UX-Qqr  
stack[++top]=0; Tq?f5swsI  
stack[++top]=data.length-1; z>b^Ui0  
# wyjb:Ql  
while(top>0){ [}4\CWM  
int j=stack[top--]; l-5O5|C  
int i=stack[top--]; ($ gmN 4  
AdbTI#eY  
pivotIndex=(i+j)/2; SJE!14|e  
pivot=data[pivotIndex]; iH>b"H >  
s~k62  
SortUtil.swap(data,pivotIndex,j); UG]x CkDS  
uWi pjxS  
file://partition Y oZd,} i  
l=i-1; C~PP}|<~V  
r=j; %&J`mq  
do{ #%{  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); %}unlSTPP  
SortUtil.swap(data,l,r); }H/94]~tH  
} e0IGx]5i  
while(l SortUtil.swap(data,l,r); QBA{*@ A-  
SortUtil.swap(data,l,j); Z{2QDjAI;  
,+x\NY2d  
if((l-i)>THRESHOLD){ hl2|Ec  
stack[++top]=i; @KJmNM1]V  
stack[++top]=l-1; &a6-+r  
} X5= Ki $+  
if((j-l)>THRESHOLD){ ]qx!51S  
stack[++top]=l+1; ^;$9>yi1  
stack[++top]=j; v7v>  
} q?8#D  
[q^pMH#U"  
} !e~d,NIy  
file://new InsertSort().sort(data); aHPx'R  
insertSort(data); Y5*A,piq  
} $4kbOqn4  
/** ^P`I"T d  
* @param data  < B!f;  
*/ waG &3m  
private void insertSort(int[] data) { [=:4^S|M  
int temp; N9vNSmm  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); wQM( |@zE}  
} )ri'W <l  
} $?9u;+jIR  
} ]SN5 &S  
K3&k+~$  
} 8jiBLZkRf  
k8cR`5 @PK  
归并排序: 5nK|0vv%2  
89W8cJ$yW  
package org.rut.util.algorithm.support; >n1UK5QD  
|=W>4>  
import org.rut.util.algorithm.SortUtil; -*2b/=$u  
3Qp6$m  
/** c~6ywuq+M`  
* @author treeroot I,V'J|=j  
* @since 2006-2-2 bHzZ4i  
* @version 1.0 [3qJUJM  
*/ >f;oY9 {m  
public class MergeSort implements SortUtil.Sort{ r%LG>c`^  
[p )2!]y  
/* (non-Javadoc) y }h2  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YL[y3&K  
*/ 2(GLc*B>  
public void sort(int[] data) { =wa5\p/  
int[] temp=new int[data.length]; e)i-$0L"  
mergeSort(data,temp,0,data.length-1); K%SfTA1TCB  
} D:(h^R0;  
@s\}ER3  
private void mergeSort(int[] data,int[] temp,int l,int r){ ke'OT>8  
int mid=(l+r)/2; }-&#vP~I  
if(l==r) return ; ^SS9BQ*m  
mergeSort(data,temp,l,mid); Xg}~\|n  
mergeSort(data,temp,mid+1,r); t'C9;  
for(int i=l;i<=r;i++){ N9z!-y'X  
temp=data; Y1BxRd?D  
} =g=Vv"B_  
int i1=l; z7a @'+'  
int i2=mid+1; w_Z*X5u  
for(int cur=l;cur<=r;cur++){ s ZokiFJ  
if(i1==mid+1) _$v$v$74^  
data[cur]=temp[i2++]; ^AO2%09.S  
else if(i2>r) DyQvk  
data[cur]=temp[i1++]; 1z3I^gI*i  
else if(temp[i1] data[cur]=temp[i1++]; l_(4CimOZ  
else ],wzZhA  
data[cur]=temp[i2++]; O^R ^Aw  
} 8)J,jh9q  
} XsMETl"Av4  
=I+5sCF{g  
} RP wP4Z  
> !HC ?  
改进后的归并排序: m h|HEkM  
fJY b)sN  
package org.rut.util.algorithm.support; >*}m .'u  
dw7h@9\ y  
import org.rut.util.algorithm.SortUtil; {7=k/Y*U  
6<UI%X  
/** [wJl]i  
* @author treeroot QSOJHRl=C  
* @since 2006-2-2 .r@'9W^8  
* @version 1.0 fXkemB^)_  
*/ GU)NZ[e  
public class ImprovedMergeSort implements SortUtil.Sort { b*< *,Ds/G  
5}_,rF?cX  
private static final int THRESHOLD = 10; PmDar<m  
'9 <APUyu  
/* ,q Bu5t  
* (non-Javadoc) }5"19 Go?  
* T9gQq 7(l  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s06R~P4  
*/ yMf["AvG  
public void sort(int[] data) { iHyA;'!Os  
int[] temp=new int[data.length]; y;HJ"5.Mw  
mergeSort(data,temp,0,data.length-1); 4$v08z Z  
} Zg!E}B:z  
/A`Ly p#  
private void mergeSort(int[] data, int[] temp, int l, int r) { *\[GfTL  
int i, j, k; OH~I+=}.  
int mid = (l + r) / 2; m*TJ@gI*t  
if (l == r) k12mxR/  
return; $h'>Zvf  
if ((mid - l) >= THRESHOLD) 65pC#$F<x  
mergeSort(data, temp, l, mid); uvGFo)9q3  
else eadY(-4|I-  
insertSort(data, l, mid - l + 1); 5W?r04  
if ((r - mid) > THRESHOLD) +' ?axv6e  
mergeSort(data, temp, mid + 1, r); _ "[O=h:  
else fkr; a`<W  
insertSort(data, mid + 1, r - mid); <1E* wPm8  
Gt?ckMB  
for (i = l; i <= mid; i++) { mg4: N  
temp = data; zMN4cBL9m  
} skfFj&_T  
for (j = 1; j <= r - mid; j++) { )TgjaR9G  
temp[r - j + 1] = data[j + mid]; ZlYb8+rW  
} iI%"]- 0@1  
int a = temp[l]; <}Rr C#uiA  
int b = temp[r]; ^VB_>|UN4  
for (i = l, j = r, k = l; k <= r; k++) { -"3<Ll  
if (a < b) { N/ mC,7Q  
data[k] = temp[i++]; A*hc w  
a = temp; 2<5s0GT'/  
} else { NU|T`gP  
data[k] = temp[j--]; YQ<O .E  
b = temp[j]; p\7(IhW@  
} V9kL\Ys  
} dg42K`E  
} nc%ly *  
_}wy|T&7k&  
/** 4 5\%2un  
* @param data _zj}i1!E"  
* @param l LP:C9 Ol\  
* @param i !/MHD  
*/ m.N/g,  
private void insertSort(int[] data, int start, int len) { 0sKY;(  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ot_xeg;7  
} P(za8l>  
} |7l*  
} rF5O?<(  
} nXqZkZE\  
hSD uByoi  
堆排序: S[cVoV  
c)fTI,.$  
package org.rut.util.algorithm.support; ?I.<mdhN#t  
,~- dZs  
import org.rut.util.algorithm.SortUtil; skP2IMa75  
g4^df%)&  
/** N!F ;!  
* @author treeroot 9rsty{J8  
* @since 2006-2-2 h $}&N  
* @version 1.0 j*jO809%^  
*/ I 0}+}{M:  
public class HeapSort implements SortUtil.Sort{ E6d0YgfD  
t,K_!-HX+  
/* (non-Javadoc) ?Y#0Je  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,-*oc>  
*/ ZKa.MBde  
public void sort(int[] data) { Q2[D|{Z  
MaxHeap h=new MaxHeap(); ZO $}m?  
h.init(data); t`X-jr)g  
for(int i=0;i h.remove(); kiFTx &gf  
System.arraycopy(h.queue,1,data,0,data.length); sX,oJIt  
} QeVM9br)m  
T6ajWUw  
private static class MaxHeap{ "!6 Ax-'  
X} v]iX  
void init(int[] data){ RWi~34r  
this.queue=new int[data.length+1]; :jq   
for(int i=0;i queue[++size]=data; DKfw8"L]  
fixUp(size); IU`&h2KZ.  
} ApYri|^r  
} q E`  
3g]Sp/  
private int size=0; fhAK^@h  
\{G1d"n  
private int[] queue; @^$Xy<x  
"7pd(p *C  
public int get() { #Xc6bA&  
return queue[1]; Q1Sf7)  
} 7usf^g[dh  
+SSF=]4+  
public void remove() { }pa@qZXh  
SortUtil.swap(queue,1,size--); t*zBN!Wu_  
fixDown(1); V[Jd1T  
} D@(Y.&_  
file://fixdown  `Up Zk?k  
private void fixDown(int k) { 8ctUK|  
int j; Yl+r>+^  
while ((j = k << 1) <= size) { W|@/<K$V  
if (j < size %26amp;%26amp; queue[j] j++; {Ah\-{]  
if (queue[k]>queue[j]) file://不用交换 r~uWr'}a}  
break; GyOo$FW  
SortUtil.swap(queue,j,k); +_ HPZo  
k = j; zF2GW  
} joh=0nk;D  
} <=*xwI&q  
private void fixUp(int k) { +`==US34  
while (k > 1) { 6t|FuTC  
int j = k >> 1; 2rq)U+   
if (queue[j]>queue[k]) *1}'ZEaJ  
break; 3Q`F x  
SortUtil.swap(queue,j,k); &41=YnC6  
k = j; s:UQ~p}"S  
} b<B|p|  
} $*bd})y)I  
99}n %(V  
} f_r1(o 5:Y  
37wm[ Z  
} Z;aQ/ n[`  
;Bo{.916  
SortUtil: `n]y"rj'  
tdn[]|=  
package org.rut.util.algorithm; !+4}x;!8  
3r?Bnf:  
import org.rut.util.algorithm.support.BubbleSort; {4g1Wr5=  
import org.rut.util.algorithm.support.HeapSort; z F'{{7o  
import org.rut.util.algorithm.support.ImprovedMergeSort; +%G*)8N3  
import org.rut.util.algorithm.support.ImprovedQuickSort; %QUV351H  
import org.rut.util.algorithm.support.InsertSort; ee]PFW28  
import org.rut.util.algorithm.support.MergeSort; ) w.cCDL c  
import org.rut.util.algorithm.support.QuickSort; N?H;fK4v  
import org.rut.util.algorithm.support.SelectionSort; EnJAHgRV;e  
import org.rut.util.algorithm.support.ShellSort; jZcjiOX  
g_}r)CgG|  
/** '!64_OMj'  
* @author treeroot !Jw   
* @since 2006-2-2 Af:4 XSO6  
* @version 1.0 y(B~)T~e@  
*/ W;coi4   
public class SortUtil { q79)nhC F  
public final static int INSERT = 1; hSc$Sa8  
public final static int BUBBLE = 2; b<qv /t)$  
public final static int SELECTION = 3; ysfR@ sH7  
public final static int SHELL = 4; <D4.kM  
public final static int QUICK = 5; ?w1_.m|8u  
public final static int IMPROVED_QUICK = 6; m& DDz+g  
public final static int MERGE = 7; B&_62`  
public final static int IMPROVED_MERGE = 8; `?PZvGi  
public final static int HEAP = 9; $WvI%r  
IBY3QG  
public static void sort(int[] data) { rp.S4;=Q9  
sort(data, IMPROVED_QUICK); |lIkmW{  
} ~a8J"Wh  
private static String[] name={ yOGa W~  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KL!k'4JNY  
}; P8e1J0A  
W?!(/`J]  
private static Sort[] impl=new Sort[]{ W{l+_a{/9  
new InsertSort(), e =Vu;  
new BubbleSort(), EVMhc"L  
new SelectionSort(), ,b=&iDc  
new ShellSort(), S=^yJ6 xJ  
new QuickSort(), p%CAicn  
new ImprovedQuickSort(), G8@({EY  
new MergeSort(), %O;"Z`I  
new ImprovedMergeSort(), iLn)Z0<\o  
new HeapSort() b7{)B?n  
}; ="RDcf/  
Dg/&m*Yl  
public static String toString(int algorithm){ L@w|2  
return name[algorithm-1]; AZxx%6  
} 59 O;`y0  
'MPt K  
public static void sort(int[] data, int algorithm) { 8zGe5Dn9  
impl[algorithm-1].sort(data); 'i_od|19~h  
} k/O|ia 6  
=Z iyT$p  
public static interface Sort { ;g: TsYwM  
public void sort(int[] data); &F[/@  
} 3x9O<H}  
V< 0gD?Kx  
public static void swap(int[] data, int i, int j) { [a\:K2*'  
int temp = data; Lw?4xerLsb  
data = data[j]; =L9sb!  
data[j] = temp; 8Vv"'CU#  
} 4aGV1u+4  
}  pzezN  
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