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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。 8 -A7  
插入排序: 4sjr\9IDC  
:g#it@  
package org.rut.util.algorithm.support; 0(x@ NGb>{  
PDng!IQ^  
import org.rut.util.algorithm.SortUtil; R"`{E,yj  
/** !`o:+Gg@  
* @author treeroot (L%q/$  
* @since 2006-2-2 T0%TeFY  
* @version 1.0 <9a_wGs  
*/ "%*lE0Tx  
public class InsertSort implements SortUtil.Sort{ F*VMS  
ue<<Y"NR  
/* (non-Javadoc) pVS2dwBqE  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s$x] fO  
*/ + t4m\/y  
public void sort(int[] data) { **w~  
int temp; 5KE%@,k k  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Gc z@ze  
} /? 1Yf  
} ok%!o+nk.  
} cu!bg+,zl  
lFGxW 5  
} ^jjJM|a  
a9zph2o-  
冒泡排序: O)%kl  
h!av)nhM  
package org.rut.util.algorithm.support; u%T$XG  
5|G3t`$pa  
import org.rut.util.algorithm.SortUtil; ."Ix#\|x  
y6jmn1K  
/** GtJ*&=(  
* @author treeroot u;ooDIq@  
* @since 2006-2-2 m_02"'  
* @version 1.0 tW"ptU^9)  
*/ }9udo,RWu  
public class BubbleSort implements SortUtil.Sort{ }_(^/pnk  
?En| _E_C  
/* (non-Javadoc) G4%M$LJ h  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) emY5xZ@N  
*/ \*!%YTZ~  
public void sort(int[] data) { R|J>8AL}BY  
int temp; 0!,gT H>  
for(int i=0;i for(int j=data.length-1;j>i;j--){ <&s)k  
if(data[j] SortUtil.swap(data,j,j-1); dN\P&"`  
} `}8@[iB'  
} >l< ~Z;  
} %^?3s5PXD  
} W;oU +z^t$  
&Dg)"Xji  
} G q:4rG|  
+}XL>=-5  
选择排序: g;#KBxE  
`Ivw`}L  
package org.rut.util.algorithm.support; JlDDM %  
t#pqXY/;D  
import org.rut.util.algorithm.SortUtil; 7|M$W(P  
R!k<l<9q  
/** :7Z\3_D/  
* @author treeroot B?lBO V4v4  
* @since 2006-2-2 J={OOj  
* @version 1.0 3pTS@  
*/ yg-FJ/  
public class SelectionSort implements SortUtil.Sort { $mI:Im`s  
y }&4HrT&  
/* g"!#]LLe  
* (non-Javadoc) ^0x.'G?  
* ]Z$TzT&@%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fi?Q 4b  
*/ mU3Y)  
public void sort(int[] data) { uO_,n  
int temp; ;Up'~BP(  
for (int i = 0; i < data.length; i++) { {GQ Aa  
int lowIndex = i; f05"3L:  
for (int j = data.length - 1; j > i; j--) { >^H'ZYzw  
if (data[j] < data[lowIndex]) { I`"-$99|t1  
lowIndex = j; ?zhI=1 ED%  
} wj#J>C2]  
} cbh#E)[ '  
SortUtil.swap(data,i,lowIndex); @!":(@3[  
} bQXc IIa{  
} ;h,R?mU  
oP=T6PX~l  
} UVT >7  
;zZ,3pl-E  
Shell排序: Esz1uty  
 `CA G8D  
package org.rut.util.algorithm.support; K9C@dvFH  
rw5#e.~V  
import org.rut.util.algorithm.SortUtil; ![a/kj  
-}_cO|kk  
/** '0CXHjZN  
* @author treeroot MK-a $~<  
* @since 2006-2-2 u>,lf\Fgz  
* @version 1.0 .K|P&  
*/ QIij>!c4  
public class ShellSort implements SortUtil.Sort{ `z3|M#r\;  
!B [1zE  
/* (non-Javadoc) QmH/yy3.%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f.b8ZBNj>  
*/ J0?$v6S  
public void sort(int[] data) { VD9 q5tt7  
for(int i=data.length/2;i>2;i/=2){ .8T\Nr\~2  
for(int j=0;j insertSort(data,j,i); `d}W;&c  
} rPiiC/T.`  
} ilDJwZg#  
insertSort(data,0,1); 5E]UI YAkV  
} < 72s7*Rv  
NK+FQ^m[  
/** %rM-"6Q  
* @param data u;+%Qh  
* @param j (MgL"8TS  
* @param i ]PR|d\O  
*/ y\F`B0#$  
private void insertSort(int[] data, int start, int inc) { dr| | !{\  
int temp; (@ %XWg  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); -@%t"8  
} \3%W_vU_  
} n\Z^K  
} W$z#ssr  
I$aXnd6)  
} W;fH&r)d@  
((-aC`  
快速排序: 8s QQK.N(  
_wm~}_Q  
package org.rut.util.algorithm.support; 2-8YSHlh  
a<f;\$h]  
import org.rut.util.algorithm.SortUtil; nnfY$&3A  
r@|R-Binz  
/** \# 7@a74  
* @author treeroot e ZynF<i  
* @since 2006-2-2 a4yOe*Ak,F  
* @version 1.0 c*.G]nRc  
*/ k!Vn4?B"k  
public class QuickSort implements SortUtil.Sort{ hX0RET  
^Lsc`<xC  
/* (non-Javadoc) | d~B]65t  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D4AEZgC F,  
*/ !c\7  
public void sort(int[] data) { lN);~|IOv7  
quickSort(data,0,data.length-1); .KFA218h*x  
} XXXl jh6  
private void quickSort(int[] data,int i,int j){ k |^vCZ<(x  
int pivotIndex=(i+j)/2; Xf6fH O  
file://swap La\Q'0  
SortUtil.swap(data,pivotIndex,j); {VBR/M(q  
USE   
int k=partition(data,i-1,j,data[j]); .JNcY]V#  
SortUtil.swap(data,k,j); :[ L{KFQU  
if((k-i)>1) quickSort(data,i,k-1); F\;2 i:(  
if((j-k)>1) quickSort(data,k+1,j); !)NYW4"  
~GSpl24W<  
} D=2~37CzQ1  
/** 7Aqn[1{_O  
* @param data :]EP@.(  
* @param i b([:,T7  
* @param j @o`sf-8x  
* @return S<V-ZV&_:U  
*/ n.@#rBKZ  
private int partition(int[] data, int l, int r,int pivot) { K-Re"zsz  
do{ ]n~yp5Nbr  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); KCE=|*6::|  
SortUtil.swap(data,l,r); w(/7Jt$  
} xf'LR[M  
while(l SortUtil.swap(data,l,r); x,w8r+~5  
return l; B@d1xjp)']  
} `q^(SM  
(m6EQoW^s+  
} Ocybc%  
nZ~kZ |VS  
改进后的快速排序: qbH %Hx  
1^S'sWwe  
package org.rut.util.algorithm.support; |ribWCv0  
cbfD B^_  
import org.rut.util.algorithm.SortUtil; ># INEO  
;"D~W#0-v  
/** tp@*=*^I  
* @author treeroot lHcA j{6  
* @since 2006-2-2 w:v=se"U  
* @version 1.0 xg?auje  
*/ :Pc(DfkS  
public class ImprovedQuickSort implements SortUtil.Sort { kY=rz&?U  
sp^Wo7&g  
private static int MAX_STACK_SIZE=4096; 5lGQ#r  
private static int THRESHOLD=10; grc:Y  
/* (non-Javadoc) &m'?*O |  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .wP/ai>}  
*/ +N7"EROc  
public void sort(int[] data) { 3EI]bmi~  
int[] stack=new int[MAX_STACK_SIZE]; "sD1T3!\)Q  
9976H\{  
int top=-1; 4oV {=~V  
int pivot; #,TELzUVE  
int pivotIndex,l,r; F.68iN}  
Yc|uD-y  
stack[++top]=0; 5\xr?`VZ  
stack[++top]=data.length-1; =PZWS& (L  
P<vo;96JT  
while(top>0){ 0Q`&inwh  
int j=stack[top--]; eSn$k:\W  
int i=stack[top--]; Je 31".  
R#ya,L  
pivotIndex=(i+j)/2; /9Z!p  
pivot=data[pivotIndex]; zSKKr?{  
*!w25t  
SortUtil.swap(data,pivotIndex,j); [ZD[a6(94  
iy}xICt  
file://partition eIJ[0c b}  
l=i-1; FfG%C>E6~  
r=j; 6A?8tm/0  
do{ IT18v[-G  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); hl<y4y&|  
SortUtil.swap(data,l,r); )b9_C O}  
} I|T7+{5z  
while(l SortUtil.swap(data,l,r); yPN+W8}f  
SortUtil.swap(data,l,j); n[P\*S  
H{%H^t>  
if((l-i)>THRESHOLD){ )b0];&hw]  
stack[++top]=i; $ser+Jt=  
stack[++top]=l-1; `;cz;"  
} *gDl~qNRoS  
if((j-l)>THRESHOLD){ #ua^{OrC/  
stack[++top]=l+1; s4bv;W  
stack[++top]=j; 8#l+{`$z  
} #1gO?N(<=  
Kp&3=e;vn{  
} #w|5 jN?  
file://new InsertSort().sort(data); iD714+N(  
insertSort(data); Oyan9~  
} |vz9Hs$@l  
/** QD4:W"i  
* @param data 9@'4P  
*/ b i~=x  
private void insertSort(int[] data) { =?/&u<  
int temp; 'Wp @b678  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ]]PE#DDg  
} 9yL6W'B!  
} yb?|Eww_o  
} OaaH$B  
`tVy_/3(9  
} )4m_A p\  
l9J*um-  
归并排序: "V}qf3 qU  
KUKI qAA  
package org.rut.util.algorithm.support; #&BS ?@  
8UM0vNk  
import org.rut.util.algorithm.SortUtil; X~L!e}Rz  
Mk5RHDh  
/** cmDT +$s  
* @author treeroot Y0RgJn  
* @since 2006-2-2 no&-YktP}  
* @version 1.0 5v|EAjB6o  
*/ b-%l-u  
public class MergeSort implements SortUtil.Sort{ 0T9. M(  
&S-er{]]  
/* (non-Javadoc) 1-o V-K  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &*gbK6JB  
*/ ti2  
public void sort(int[] data) { ^P$7A]!  
int[] temp=new int[data.length]; zPE$  
mergeSort(data,temp,0,data.length-1); Z@M6!;y#  
} ~ffwLgu!  
X-/Ban  
private void mergeSort(int[] data,int[] temp,int l,int r){ -;Uj|^  
int mid=(l+r)/2; ir&.Z5=  
if(l==r) return ; h<NRE0-  
mergeSort(data,temp,l,mid); eY}V9*.v  
mergeSort(data,temp,mid+1,r); u)~s4tP4  
for(int i=l;i<=r;i++){ x~+-VF3/  
temp=data; >r}Vf9 5[N  
} (U9a@ 1  
int i1=l; nk/vGa4  
int i2=mid+1; CDCC1BG"  
for(int cur=l;cur<=r;cur++){ S#2[%o  
if(i1==mid+1) ;_tO+xL&  
data[cur]=temp[i2++]; vr4S9`,  
else if(i2>r) hW' HT  
data[cur]=temp[i1++]; [cpNiw4e  
else if(temp[i1] data[cur]=temp[i1++]; _tWE8 r,  
else {ERjeuDm]  
data[cur]=temp[i2++]; v8'5pLt"  
} (oYW]c}G,  
} 6N3@!xtpi  
MZ~.(&  
} /80YZ   
zH=hI Vc  
改进后的归并排序: Ef,Cd[]b  
_]o5R7[MQ  
package org.rut.util.algorithm.support; jVYH;B%%z  
.$wLLE^*  
import org.rut.util.algorithm.SortUtil; 6mHhC?  
zYr z08PJ  
/** 7cw]v"iv  
* @author treeroot aQ|hi F}  
* @since 2006-2-2 Euu ,mleM  
* @version 1.0 M&[b.t*  
*/ :hP58 }Q$  
public class ImprovedMergeSort implements SortUtil.Sort { @T7PZB&xnl  
eP= j.$  
private static final int THRESHOLD = 10; oEIqA  
l%<c6;  
/* sykFSPy`'  
* (non-Javadoc) %U?)?iZdL  
* >EIrw$V$  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %nQmFIt  
*/ wPH+n-&e  
public void sort(int[] data) { sX'nn   
int[] temp=new int[data.length]; DL4iXULNY  
mergeSort(data,temp,0,data.length-1); (\& 62B1  
} J]\^QMX  
|yv]Y/ =  
private void mergeSort(int[] data, int[] temp, int l, int r) { ]l&'k23~p  
int i, j, k; ZNL5({lv  
int mid = (l + r) / 2; }Vl^EAR  
if (l == r) g;G5 r&T  
return; )X%oXc&C|  
if ((mid - l) >= THRESHOLD) !*bdG(pK  
mergeSort(data, temp, l, mid); qTy v.#{y  
else PL@7 KD Q  
insertSort(data, l, mid - l + 1); $5L(gn[  
if ((r - mid) > THRESHOLD) Q>%E`h  
mergeSort(data, temp, mid + 1, r); $W,zO|-  
else }`]]b+_b>@  
insertSort(data, mid + 1, r - mid); 61,O%lV  
"tX7%(  
for (i = l; i <= mid; i++) { gh61H:tkR  
temp = data; w4A#>;Qu*  
}  mn`5pha  
for (j = 1; j <= r - mid; j++) { XtzOFx/  
temp[r - j + 1] = data[j + mid]; mATH*[Y  
} "XB4yExy  
int a = temp[l]; b9#m m  
int b = temp[r]; ^U{P3 %uZ  
for (i = l, j = r, k = l; k <= r; k++) { JWWInuH  
if (a < b) { A^L?_\e6  
data[k] = temp[i++]; DaDUK?  
a = temp; >~wu3q  
} else { DaCblX  
data[k] = temp[j--]; ~'{VaYk]v  
b = temp[j]; |0]YA  
} #[(gIOrNn8  
} @ExLh9  
} _.-#E$6s#q  
y($EK(cb  
/** wPQ&Di*X}  
* @param data wt\m+!u`  
* @param l b=G4MZQ  
* @param i <(?' s9  
*/ g/B\ObY  
private void insertSort(int[] data, int start, int len) { C (U  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f-&ATTx`J  
} :mn(0 R~  
} $>![wZ3  
} T+(M8 qb  
} R. O  
$r):d  
堆排序: XD 5n]AL  
Z,SY N?@  
package org.rut.util.algorithm.support; T;J7+0  
;/R kMS  
import org.rut.util.algorithm.SortUtil; \#2 s4RCji  
7|{ B#  
/** |zh +  
* @author treeroot R)Q/Ff@o0  
* @since 2006-2-2 ovbEmb  
* @version 1.0 |SxMN %M!  
*/ L7<+LA)s0  
public class HeapSort implements SortUtil.Sort{ V&g)m.d:n  
pbPz$Y  
/* (non-Javadoc) 2+o!o  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i`R(7Z  
*/ 9lKRL'QR  
public void sort(int[] data) { Ca X^)  
MaxHeap h=new MaxHeap(); 9QC< E|  
h.init(data); el}hcAY/RP  
for(int i=0;i h.remove(); 27Cz1[oX  
System.arraycopy(h.queue,1,data,0,data.length); k?< i*;7  
} )U]:9)   
}iMXXXBOT  
private static class MaxHeap{ vUqe.?5  
gt~9"I  
void init(int[] data){ nT#37v  
this.queue=new int[data.length+1]; ^u3*hl}YKy  
for(int i=0;i queue[++size]=data; g%ZdIKj!  
fixUp(size); }M^_Z#|,  
} .l7j8 }  
} Gl.?U;4Z  
b/z'`?[  
private int size=0; 7,f:Qi@g  
CcBQo8!G  
private int[] queue; ]F !'M  
J`4Z<b53  
public int get() { -!@H["  
return queue[1]; *3 !(*F@M,  
} hK Fk$A  
MST:.x ;  
public void remove() { y2U/$%B)G  
SortUtil.swap(queue,1,size--); yq1Gqbh l  
fixDown(1); EK^JLvyT  
} eR7qE) h  
file://fixdown =sxkrih  
private void fixDown(int k) { L7X7Zt8%  
int j; n'q aR<bY  
while ((j = k << 1) <= size) { >y]?MGk  
if (j < size %26amp;%26amp; queue[j] j++; +d.u##$  
if (queue[k]>queue[j]) file://不用交换 pi|\0lH6W  
break; _c[|@D  
SortUtil.swap(queue,j,k); NAJ '><2  
k = j; |!{ z? i  
} n; Lo  
} lq~Gc M  
private void fixUp(int k) { zB;'_[8M  
while (k > 1) { ,NjX&A@  
int j = k >> 1; )ZQHa7V  
if (queue[j]>queue[k]) u9esdOv  
break; pTc$+Z7 3  
SortUtil.swap(queue,j,k); >/(i3)  
k = j; >?^~s(t  
} s[Y)d>~\$=  
} Xq+!eOT  
.UNF~}^H  
} " ]aQ Hh]f  
>_rzT9gX&  
} &B?@@ 6  
]\[m=0K  
SortUtil: f+*J ue  
R1I I k  
package org.rut.util.algorithm; d-9uv|SJ  
,Y`'myL8W  
import org.rut.util.algorithm.support.BubbleSort; <]Ij(+J;  
import org.rut.util.algorithm.support.HeapSort; ,O$Z,J4VL  
import org.rut.util.algorithm.support.ImprovedMergeSort; "2*G$\  
import org.rut.util.algorithm.support.ImprovedQuickSort; qlz( W  
import org.rut.util.algorithm.support.InsertSort; { z-5GH|  
import org.rut.util.algorithm.support.MergeSort; :({-0&&_  
import org.rut.util.algorithm.support.QuickSort; |Dl*w/n  
import org.rut.util.algorithm.support.SelectionSort; q >Q:X3  
import org.rut.util.algorithm.support.ShellSort; A M>Yj  
l[tY,Y:4qO  
/** &?P=arU  
* @author treeroot it(LphB8  
* @since 2006-2-2 \pjRv  
* @version 1.0 ~5lKL5w  
*/ 1~["{u  
public class SortUtil { 1"8Z y6t  
public final static int INSERT = 1; clh3  
public final static int BUBBLE = 2; \4[c}l  
public final static int SELECTION = 3; *ge].E  
public final static int SHELL = 4; [5>S-Z  
public final static int QUICK = 5; FQ ;4'B^k]  
public final static int IMPROVED_QUICK = 6; 1{SrHdD=  
public final static int MERGE = 7; k98< s  
public final static int IMPROVED_MERGE = 8; b:N^Fe  
public final static int HEAP = 9; >2l13^Y  
i /O1vU#  
public static void sort(int[] data) { qZT 4+&y  
sort(data, IMPROVED_QUICK); C><<0VhU  
} '5|Q<5!o  
private static String[] name={ @4 zi]v  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dzjBUD  
}; FRl3\ZDqrb  
N?MJ#lC F  
private static Sort[] impl=new Sort[]{ *u|lmALs  
new InsertSort(), DhtU]w}  
new BubbleSort(), Sqp;/&Ji  
new SelectionSort(), LK'S)Jk  
new ShellSort(), XM$5S+e  
new QuickSort(), %8}WX@SB  
new ImprovedQuickSort(), \_*?R,$3Y,  
new MergeSort(), %JP&ox|^&  
new ImprovedMergeSort(), dWzDSlP&  
new HeapSort() nx!qCgo  
}; c,v^A+sZu  
"E@NZ*"u  
public static String toString(int algorithm){ 9[epr+f  
return name[algorithm-1]; .4S^nP  
} J8sJ~FnUj  
b>hBct}  
public static void sort(int[] data, int algorithm) { kj Lsk-  
impl[algorithm-1].sort(data); ]y1$F Ir+  
} _~X8/p/Qh  
&^CL] &/  
public static interface Sort { ?6gDbE%  
public void sort(int[] data); 8! |.H p  
} VYl_U?D  
dCf'\ @<<  
public static void swap(int[] data, int i, int j) { hYP6z^  
int temp = data; zh#OD{  
data = data[j]; _1w.B8Lyz@  
data[j] = temp; nvO%  
} Lu8%qcC  
} 7AGZu?1]M  
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