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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。 `u7^r^>A  
插入排序: `@WJ_-$#  
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package org.rut.util.algorithm.support; =yM%#{t&W  
lhnGk'@d  
import org.rut.util.algorithm.SortUtil; (fr=N5   
/** O9o]4;  
* @author treeroot  UBj&T^j  
* @since 2006-2-2 %W2U$I5  
* @version 1.0 "vQ%` Q  
*/ RLL%l  
public class InsertSort implements SortUtil.Sort{ Z h9D^ I  
LH=^3Gw  
/* (non-Javadoc) >Yk|(!v  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NI.ROk1{+4  
*/ JZ*.;}"  
public void sort(int[] data) { dLF*'JjY  
int temp; cDzb}W*UM  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); }<@-=  
} *}';q`u }  
} z*q+5p@~  
} Iz'Et'w8!  
z}.6yHS  
} Rm79mh9  
-Ah&|!/  
冒泡排序: ^OX}y~'  
.T ,HtHe  
package org.rut.util.algorithm.support; t+q;}ZvG  
;hV|W{=w  
import org.rut.util.algorithm.SortUtil; J7- vB",U  
Lccy~2v>  
/** *RVCz|0%w  
* @author treeroot MP<]-M'|<  
* @since 2006-2-2 W[qy4\.B  
* @version 1.0 rFkZ'rp74b  
*/ $pAVTz  
public class BubbleSort implements SortUtil.Sort{ L6i|5 P  
k~K;r8D/  
/* (non-Javadoc) S:`Gi>D  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0s H~yvM5  
*/ |HYST`  
public void sort(int[] data) { s :BW}PM  
int temp; %G,7Ul1f  
for(int i=0;i for(int j=data.length-1;j>i;j--){ :) -`  
if(data[j] SortUtil.swap(data,j,j-1); ]];pWlo!  
} {:VK}w  
} JC-> eY"O2  
} :).NA ]  
} ,Wu$@jD/ ]  
ceD6q~)  
} -y|']I^ &  
jAue+ tB  
选择排序: )!cucY  
CDXN%~0h  
package org.rut.util.algorithm.support; T0"nzukd  
>3B {sn}  
import org.rut.util.algorithm.SortUtil; L-rV+?i`6f  
izGU&VeB  
/** }$L1A   
* @author treeroot WQze|b %  
* @since 2006-2-2 Y<(7u`F  
* @version 1.0 }7b{ZbDI  
*/ eyp_.1C~  
public class SelectionSort implements SortUtil.Sort { IDD`N{EA  
TQNdBq5I6  
/* m ie~. "  
* (non-Javadoc) XTk :lzFH  
* |2n*Ds'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (Fuu V{x|  
*/ WAR!#E#J7  
public void sort(int[] data) { $'_Q@ZBq  
int temp; *i#N50k*j'  
for (int i = 0; i < data.length; i++) { p-)@#hE  
int lowIndex = i; pX*E(Q)@!  
for (int j = data.length - 1; j > i; j--) { )V>zXy}Y  
if (data[j] < data[lowIndex]) { do.>Y}d  
lowIndex = j; ::iYydpM  
} %e0X-tXcmX  
} 7UG c2J  
SortUtil.swap(data,i,lowIndex); 77sG;8HE  
} +Yq?:uBV  
} W94u7a  
OPE+:TvW^  
} dTCLE t.  
rr\9HA  
Shell排序: bma.RCyY<  
9a`~ K L  
package org.rut.util.algorithm.support; #W|Obc]K  
n 3&h1-  
import org.rut.util.algorithm.SortUtil; DNgh#!\X  
AB,(%JT/2{  
/** s_RK x)w@  
* @author treeroot }fkdv6mz  
* @since 2006-2-2 Ja4M@z  
* @version 1.0 &v1E)/q{Z  
*/ lxgfi@@+h  
public class ShellSort implements SortUtil.Sort{ ~MC 5rOA  
`8O Bw  
/* (non-Javadoc) [A {o"zY  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s5+;8u9K  
*/ ~vA8I#.  
public void sort(int[] data) { KU{zzn;g  
for(int i=data.length/2;i>2;i/=2){ f{O-\  
for(int j=0;j insertSort(data,j,i); KehM.c^  
} ar,v/l>d4N  
} 0F![<5X  
insertSort(data,0,1); qNHI$r'  
} LEtGrA/%@b  
4gev^/^^  
/** ^[}W}j>  
* @param data .o]I^3tf c  
* @param j btnD+O66<  
* @param i \),f?f-m  
*/ B6TE9IoSb8  
private void insertSort(int[] data, int start, int inc) { 5{+2#-  
int temp; }:{ @nP  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); YT'V/8US  
} qrj f  
} e1JH N  
} lg2I|Z6DH  
"s]  
} XRQ1Uh6  
[_3&  
快速排序: i%<NKE;v7m  
0QPY+6  
package org.rut.util.algorithm.support; `+vQ5l$;L  
*,:2O&P  
import org.rut.util.algorithm.SortUtil; RFFbS{U*  
5[B)U">]  
/** ,YBO}l  
* @author treeroot ,ZrR*W?iF  
* @since 2006-2-2 "K9[P :nw  
* @version 1.0 [bX ^_ Y  
*/ dyf>T}Iy  
public class QuickSort implements SortUtil.Sort{ V6_":L"!  
SB('Nqih  
/* (non-Javadoc) 6)ZaK  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3dbaCusT$  
*/ :*[mvF  
public void sort(int[] data) { ;r6YIS4@  
quickSort(data,0,data.length-1); ;~$Q;m 1  
} "x$L 2>9  
private void quickSort(int[] data,int i,int j){ LD NdHG6  
int pivotIndex=(i+j)/2; eAI|zk6  
file://swap M;3q.0MU  
SortUtil.swap(data,pivotIndex,j); pp1Kor  
sUmpf4/  
int k=partition(data,i-1,j,data[j]); xhho{  
SortUtil.swap(data,k,j); 0[<' ygu  
if((k-i)>1) quickSort(data,i,k-1); cV@^<  
if((j-k)>1) quickSort(data,k+1,j); rr(kFQ"  
"+qZv(  
} >FHx],  
/** ZlE=P4`X:  
* @param data Kf(Px%G6K  
* @param i E>*Wu<<  
* @param j 1R*;U8?  
* @return R=, pv'  
*/ |T"j7  
private int partition(int[] data, int l, int r,int pivot) { +/[Rvh5WZ  
do{ 5W|wDy  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); FYE(lEjxi  
SortUtil.swap(data,l,r); \r{wNqyv  
} ThW9=kzQW  
while(l SortUtil.swap(data,l,r); -$=RQH$9  
return l; aQY.96yo  
} _dAn/rj   
G.@K#a9  
} -6s]7#IC  
qRcg|']R  
改进后的快速排序: 4Wa$>vz  
l:u1P  
package org.rut.util.algorithm.support; IDqUiN  
vR5X  
import org.rut.util.algorithm.SortUtil; 1|>vk+;1h  
N M),2%<  
/** hSAI G  
* @author treeroot :@E^oNKa0  
* @since 2006-2-2 hR2 R  
* @version 1.0 aL;zN%Tw  
*/ UA6 C/  
public class ImprovedQuickSort implements SortUtil.Sort { 9{S$%D  
mRyf+O[  
private static int MAX_STACK_SIZE=4096; +jq@!P"}d  
private static int THRESHOLD=10; jVGAgR=[G  
/* (non-Javadoc) %yKcp5_  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vmOye/?k  
*/ AA ~7"2e  
public void sort(int[] data) { 47*2QL^zj  
int[] stack=new int[MAX_STACK_SIZE]; E#tfCM6  
&6Lh>n(  
int top=-1; ^b$G.h{o!E  
int pivot; Xm(#O1Vm(l  
int pivotIndex,l,r; pjV70D8$A  
4$N,|bt  
stack[++top]=0; /FW$)w2{j  
stack[++top]=data.length-1; 2Q%M2Ua  
H|j]uLZ  
while(top>0){ '|v<^EH  
int j=stack[top--]; zT/woiyB`  
int i=stack[top--]; $/JXI?K  
P@5-3]m=  
pivotIndex=(i+j)/2; r]QeP{  
pivot=data[pivotIndex]; jY/(kA]}  
0v1~#KCm  
SortUtil.swap(data,pivotIndex,j); +9t{ovF?L  
l6xqc,h!K  
file://partition N~`r;E  
l=i-1; Rw[!Jq  
r=j; 8(q8}s$>  
do{ \7xc*v [  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); yEJ3O^(F  
SortUtil.swap(data,l,r); (~F}O  
} J &=5h.G$  
while(l SortUtil.swap(data,l,r); :*|So5fs  
SortUtil.swap(data,l,j); 6fBA #Kb  
g%m-*v*  
if((l-i)>THRESHOLD){ 9aIv|cS?  
stack[++top]=i; Q($@{[lT  
stack[++top]=l-1; 3]'h(C  
} ErsJWp  
if((j-l)>THRESHOLD){ :(3'"^_NA  
stack[++top]=l+1; + <w6sPm  
stack[++top]=j; Tb:'M:dM"  
} &,l7wK  
)M[FPJP}  
} 9T`YHA'g  
file://new InsertSort().sort(data); |@R/JGB^  
insertSort(data); &lzCRRnvt  
} tN.BI1nB  
/** ]PL\;[b>  
* @param data U%VFr#  
*/ ab)ckRC  
private void insertSort(int[] data) { r,vSDHb`j  
int temp; I7'v;*  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); KlBT9"6"  
} K@osD7-  
} =R9`to|  
} _XrlCLp: d  
q %tq9%  
} i{Q,>Rt  
7Ot&]M  
归并排序: ?G&J_L=@Y  
Dp^=%F{t  
package org.rut.util.algorithm.support; J]48th0,  
t0:~BYXu  
import org.rut.util.algorithm.SortUtil; L/bvM?B^  
es+ZPX>Y  
/** L!ms{0rJ  
* @author treeroot fbah~[5}  
* @since 2006-2-2 '?{L gj^R  
* @version 1.0 -I#<?=0B  
*/ P$clSJW  
public class MergeSort implements SortUtil.Sort{ ?&U~X)Q  
@fVz *  
/* (non-Javadoc) S|yDGT1  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dOg c%(kz  
*/ mwz!7Q   
public void sort(int[] data) { 0.(7R,-  
int[] temp=new int[data.length]; _R ;$tG,  
mergeSort(data,temp,0,data.length-1); '=K~M  
} ^fS_h `B  
biQ~q $E  
private void mergeSort(int[] data,int[] temp,int l,int r){ />PH{ l  
int mid=(l+r)/2; w>RwEU+w=@  
if(l==r) return ; =fhRyU:C[z  
mergeSort(data,temp,l,mid); D42!#  
mergeSort(data,temp,mid+1,r); |*]<*qnZt  
for(int i=l;i<=r;i++){ p8&rl|z|  
temp=data; HGj[\kU~  
} ?#ywUEY* i  
int i1=l; {;JFoe+  
int i2=mid+1; `j.-hy>s  
for(int cur=l;cur<=r;cur++){ 8D^ iQBA  
if(i1==mid+1) |hu9)0 P  
data[cur]=temp[i2++]; F22]4DLHO  
else if(i2>r) H}1XK|K3#H  
data[cur]=temp[i1++]; UM+g8J{$*;  
else if(temp[i1] data[cur]=temp[i1++]; >-`-D=!V  
else ai4ro"H  
data[cur]=temp[i2++]; 2)q$HUIX  
} +]C|y ,r  
} U\YzE.G1]S  
g9=O<u#  
} 7Uh/Gl  
D;DI8.4`N  
改进后的归并排序: dFnu&u"  
_C$SaQty[Q  
package org.rut.util.algorithm.support; 79'N/:.  
dW|S\S'&  
import org.rut.util.algorithm.SortUtil; 5 ^tetDz}  
H|;BT  
/** 3J^'x  
* @author treeroot jrYA5>=>#  
* @since 2006-2-2 0IbR>zFg.  
* @version 1.0 oi^pU  
*/ @CCDe`R*  
public class ImprovedMergeSort implements SortUtil.Sort { [;7$ 'lr%D  
r$!  
private static final int THRESHOLD = 10; re@OPiXa v  
"/\- ?YJjw  
/* Novn#0a  
* (non-Javadoc) QWwEfL  
* m&6)Vt  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @c%h fI  
*/ ~t.i;eu  
public void sort(int[] data) { z"{Ji{>%=  
int[] temp=new int[data.length]; lhFv2.qR  
mergeSort(data,temp,0,data.length-1); ~NwX,-ri  
} )TkXdA?.  
0 |Rmb  
private void mergeSort(int[] data, int[] temp, int l, int r) { &[-b #&y  
int i, j, k; t hQ)J|1  
int mid = (l + r) / 2; >=L<3W1  
if (l == r) 4Mj cx.21  
return; p+{*&Hm5  
if ((mid - l) >= THRESHOLD) hKQg:30<  
mergeSort(data, temp, l, mid); *Cx3bg*Gan  
else tWI4x3 &2  
insertSort(data, l, mid - l + 1); Ky[-ZQQo=5  
if ((r - mid) > THRESHOLD) <cR]-Yr~  
mergeSort(data, temp, mid + 1, r); ,N2|P:x  
else >iWw i'T=  
insertSort(data, mid + 1, r - mid); u-X P `  
6vZ.CUK9  
for (i = l; i <= mid; i++) { /q6 ^.>b  
temp = data; um mkAeWb  
} _n3"  
for (j = 1; j <= r - mid; j++) { E&2mFg  
temp[r - j + 1] = data[j + mid]; FZJ sZeO  
} kQ $.g<  
int a = temp[l]; 1}I%yOi)  
int b = temp[r]; ?\T):o;/  
for (i = l, j = r, k = l; k <= r; k++) { )Hlc\Mgy  
if (a < b) { X&bnyo P  
data[k] = temp[i++]; DzK%$#{<  
a = temp; :g"U G0];  
} else { $N17GqoC  
data[k] = temp[j--]; c UHKE\F  
b = temp[j]; 7V7iIbi  
} .s>PDzM $  
} w!/se;_H+w  
} .c2Zr|X  
ZHOh(  
/** tCP;IU$  
* @param data DTSK*a`  
* @param l /-&a]PJ  
* @param i 1 c4I`#_v  
*/ ~z*A%vp6ER  
private void insertSort(int[] data, int start, int len) { orr6._xw  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8>~\R=SC  
} $+Vp>  
} pe7R1{2Q_s  
} DM)%=C6<  
} 6 2#dSd}HG  
a?X{k|;!7u  
堆排序: M}b[;/~  
Zjkrne{  
package org.rut.util.algorithm.support; @G>Q(a*,  
!&8HA   
import org.rut.util.algorithm.SortUtil; }6^d/nE*T  
[%yCnt  
/** 58.b@@T  
* @author treeroot '"<h;|  
* @since 2006-2-2 *[O)VkL\%i  
* @version 1.0 /?g:`NT  
*/ T@,tlIM  
public class HeapSort implements SortUtil.Sort{ K\vyfYi  
Z{J{6j  
/* (non-Javadoc) C*1,aLSw  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $ -n?q w  
*/ d#]XyN>  
public void sort(int[] data) { Ct,|g =(  
MaxHeap h=new MaxHeap(); u'Ua ++a\  
h.init(data); &KZr`"cT#  
for(int i=0;i h.remove(); ;Jq 7E  
System.arraycopy(h.queue,1,data,0,data.length); c2fbqM~  
} %Ut7%obpi  
gls %<A{C  
private static class MaxHeap{ NT<> LWo  
is [p7-  
void init(int[] data){ A5LTgGzaW  
this.queue=new int[data.length+1]; g4 G?hv`R  
for(int i=0;i queue[++size]=data; MZInS:Vj  
fixUp(size); f)/5%W7n}  
} =]yzy:~ey  
} {E+o+2L  
idh5neyL  
private int size=0; } :8{z`4H  
vpl> 5%  
private int[] queue; 3BWYSJ|  
y&$v@]t1  
public int get() { xsIuPL#_  
return queue[1]; h1`u-tc2x  
} iw ==q:$  
op]HF4  
public void remove() { 7`IoQvX  
SortUtil.swap(queue,1,size--); %uWq)D4r  
fixDown(1); eL7\})!W  
} +Tug.[A  
file://fixdown pN ^^U[  
private void fixDown(int k) { pAd 8-a  
int j; &6mXsx$  
while ((j = k << 1) <= size) { 5bKm)|4z6  
if (j < size %26amp;%26amp; queue[j] j++; bF X0UE>  
if (queue[k]>queue[j]) file://不用交换 :yTpjC-S]  
break; pa@@S $(  
SortUtil.swap(queue,j,k); ;"77? )  
k = j; s;eOX\0  
} 5D#Mhgun  
} y6*9, CF  
private void fixUp(int k) { G uLU7a  
while (k > 1) { `78:TU~5S  
int j = k >> 1; L]C|&K P  
if (queue[j]>queue[k]) |wFfVDp  
break; m$X0O_*A  
SortUtil.swap(queue,j,k); ?UGA-^E1  
k = j; )LP=IT  
} 93aRWEu3  
} `/0S]?a.{B  
eJ3w}"?9s  
} `x0GT\O2-  
hH|moj]  
} ..g?po  
,xeJf6es  
SortUtil: ;$Q&2}L[  
 KDODUohC  
package org.rut.util.algorithm; ^t'mfG|DV  
:t36]NM  
import org.rut.util.algorithm.support.BubbleSort;  *Fe  
import org.rut.util.algorithm.support.HeapSort; ~ojH$=K>d  
import org.rut.util.algorithm.support.ImprovedMergeSort; D|`I"N[<  
import org.rut.util.algorithm.support.ImprovedQuickSort; lSu\VCG  
import org.rut.util.algorithm.support.InsertSort; B]o5 HA<k  
import org.rut.util.algorithm.support.MergeSort; 2# y!(D8  
import org.rut.util.algorithm.support.QuickSort; V"T48~Ue  
import org.rut.util.algorithm.support.SelectionSort; j(|9>J*,~G  
import org.rut.util.algorithm.support.ShellSort; Bi'qy]%  
uGxh}'&  
/**  gh{Z=_  
* @author treeroot */ ~_3  
* @since 2006-2-2 '8$*gIQ8  
* @version 1.0 E~y@ue:  
*/ 1D6F WYV8  
public class SortUtil { 0A}'@N@G)  
public final static int INSERT = 1; ~F ,mc.  
public final static int BUBBLE = 2; -J$,W`#z  
public final static int SELECTION = 3; eiJ 13`T  
public final static int SHELL = 4; 6!eI=h2P  
public final static int QUICK = 5; A+:X  
public final static int IMPROVED_QUICK = 6; !X5~!b^*  
public final static int MERGE = 7; X{j`H\'L  
public final static int IMPROVED_MERGE = 8; dF?:&oP]  
public final static int HEAP = 9; sKvz<7pag  
sfv{z!mo  
public static void sort(int[] data) { <ETR6r  
sort(data, IMPROVED_QUICK); d0Jaa1b~O  
} bCv^za]P6  
private static String[] name={ f""+jc1  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cM= ? {W7~  
}; |NsrO8H   
aOj(=s  
private static Sort[] impl=new Sort[]{ 9F&s9(=\  
new InsertSort(), c%N8|!e  
new BubbleSort(), P}AfXgr  
new SelectionSort(), HX(Z(rcI  
new ShellSort(), BO3#*J5S\  
new QuickSort(), |V 3AA   
new ImprovedQuickSort(), {g%F 3-  
new MergeSort(), Dp5hr8bT  
new ImprovedMergeSort(), _qZ?|;o^  
new HeapSort() HFr#Ql>g  
}; =Qa*-*  
%SHjJCS3  
public static String toString(int algorithm){ yt+"\d  
return name[algorithm-1];  t dl Y  
} <d$L}uQwg  
#fy#G}c  
public static void sort(int[] data, int algorithm) { phT|w H  
impl[algorithm-1].sort(data); /:YJ2AARY  
} ] X9e|  
Fjc4[ C  
public static interface Sort { 1Rrl59}5  
public void sort(int[] data); I(cy<ey+e  
} o]#M8)=  
XpFo SW#K  
public static void swap(int[] data, int i, int j) { E7_)P>aS5  
int temp = data; HH\6gs]u  
data = data[j]; b?p_mQKtZ  
data[j] = temp; @213KmB.  
} ww_gG5Fc$  
} w4S0aR:yL  
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