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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。 <WPLjgtn3  
插入排序: Ky:y1\K1^K  
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package org.rut.util.algorithm.support; v>S[} du  
VR:4|_o  
import org.rut.util.algorithm.SortUtil; &:Mk^DH5  
/** [22>)1<(  
* @author treeroot _c:}i\8R  
* @since 2006-2-2 $eqwn&$n  
* @version 1.0 p>9-Ga  
*/ {c|{okQ;Q  
public class InsertSort implements SortUtil.Sort{ V@%:y tDf  
O:G5n 5J  
/* (non-Javadoc) p0r:U< &  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kx3?'=0;5  
*/ ]|6)'L&]*s  
public void sort(int[] data) { yv),>4_6  
int temp; M9*#8>  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); :9c[J$R4  
} hW~XE{<  
} 0 rge]w.X  
} w^/jlddF  
#Cy9E"lP  
} [9c|!w^F  
c}$C=s5 h}  
冒泡排序: l:'\3-2a  
vZ0K1UTEXY  
package org.rut.util.algorithm.support; e"I+5r",  
8l<4OgoK  
import org.rut.util.algorithm.SortUtil; 4nvi7  
SAQ|1I#"/  
/**  MjjN  
* @author treeroot /);S?7u.  
* @since 2006-2-2 +Y|1 7 n  
* @version 1.0 KO!.VxG]_  
*/ qL;T^ljP  
public class BubbleSort implements SortUtil.Sort{ ?q lpi(  
B)!ty"  
/* (non-Javadoc) qG&}lg?g{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /RF=8,A  
*/ EklcnM|6  
public void sort(int[] data) { V{D~e0i/v  
int temp; d[( }  
for(int i=0;i for(int j=data.length-1;j>i;j--){ wr`+xYuuC=  
if(data[j] SortUtil.swap(data,j,j-1); kiP-^Wan  
} +xL*`fn  
} -% ,3qhsd  
} O/{X:Ja{  
} D~^P}_e.  
,JU3 w  
} ;]c:0W '  
5w^6bw){  
选择排序: j92X"yB  
d~hN`ff  
package org.rut.util.algorithm.support; |mS-<e8LY4  
&[Zg;r    
import org.rut.util.algorithm.SortUtil; ;"R1>tw3)  
K6BP~@H_D  
/** }M0GPpv  
* @author treeroot g]mR;T3  
* @since 2006-2-2 rYn)E=FG/  
* @version 1.0 8mh@C6U  
*/ .,l4pA9v  
public class SelectionSort implements SortUtil.Sort { J]-z7<j']  
B3';Tcs  
/* aS $ J `  
* (non-Javadoc) %@ ,! (  
* ~'.SmXZs  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])  WBd$#V3  
*/ uH.1'bR?a  
public void sort(int[] data) { ?LAiSg=eq  
int temp; eE0'3?q(  
for (int i = 0; i < data.length; i++) { rm5@dM@  
int lowIndex = i; 3ss0/\3P  
for (int j = data.length - 1; j > i; j--) { Acl?w }Y  
if (data[j] < data[lowIndex]) { r:~q{  
lowIndex = j; +U^H`\EUr  
} c|2+J :}p  
} ^VOA69n>$  
SortUtil.swap(data,i,lowIndex); -TT{4\%s  
} 1Z_2s2`p  
} &W*do  
q L-Ni  
} tmgZNg  
&`LR{7m  
Shell排序: ;JHR~ TV  
O,_k.EH  
package org.rut.util.algorithm.support; oa"_5kn,  
\&,{N_G#L.  
import org.rut.util.algorithm.SortUtil; 12 TX_0  
} b/Xui9Q  
/** OTmw/#ug  
* @author treeroot z[?&bF<|  
* @since 2006-2-2 G|eJac>  
* @version 1.0 G5T(  
*/ $*S&i(z  
public class ShellSort implements SortUtil.Sort{ nYE' 'g+x  
F5s`AjU  
/* (non-Javadoc) ;/R\!E   
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E 5N9.t h  
*/ =#.qe=  
public void sort(int[] data) { xO0}A1t Wd  
for(int i=data.length/2;i>2;i/=2){ LUfo@R  
for(int j=0;j insertSort(data,j,i); 6-t:eo9  
} 9H%dK^C  
} OBEHUJ5  
insertSort(data,0,1); o @(.4+2m  
} iQ8T3cC+  
szw|`S>o  
/** ph~ d%/^jI  
* @param data 3DX@ggE2  
* @param j 4SNDKFw  
* @param i 3:mZ1+  
*/ /DGEI&}&:u  
private void insertSort(int[] data, int start, int inc) { DWXHx  
int temp; F['%?+<3  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); UPGS/Xs]1  
} s)-O{5;U  
} pkEx.R)  
} Y$<p_X,  
QnH;+k ln  
} 0wpGIT!2  
mXK7y.9\  
快速排序: j|DjO?._'  
,(v=ZeI  
package org.rut.util.algorithm.support; E/ {v6S{)Y  
4OTrMT$y  
import org.rut.util.algorithm.SortUtil; D0*+7n3  
&,%+rvo}  
/** +8Q5[lh2]j  
* @author treeroot "Gc\"'^r  
* @since 2006-2-2 DPBWw[  
* @version 1.0 a2.@Zyz  
*/ 3:?QE  
public class QuickSort implements SortUtil.Sort{ z`2Ais@ao  
rGgP9 (  
/* (non-Javadoc) HvJ-P#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B{2WvPX~q  
*/ eEZZ0NNe;  
public void sort(int[] data) { {D`_q|  
quickSort(data,0,data.length-1); J}Ji /  
} R d|M)  
private void quickSort(int[] data,int i,int j){ 7Rl/F1G o}  
int pivotIndex=(i+j)/2; v&3 Oc  
file://swap YtFH@M  
SortUtil.swap(data,pivotIndex,j); ()ZP =\L  
T_I ApC  
int k=partition(data,i-1,j,data[j]); ?!;i/h*{  
SortUtil.swap(data,k,j); /?B%,$~  
if((k-i)>1) quickSort(data,i,k-1); [t+qYe8  
if((j-k)>1) quickSort(data,k+1,j); P,*yuF|bk  
[{-5  
} abtYa  
/** byN4?3 F  
* @param data Nf1&UgX  
* @param i ' )~G2Ys  
* @param j jm&PGZ#n=R  
* @return J5L[)Gd)D  
*/ aBT8mK -.  
private int partition(int[] data, int l, int r,int pivot) { 0RGqpJxk  
do{ CQh6;[\:  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); |TRl >1rv  
SortUtil.swap(data,l,r); 5$%CRm  
} ~zc B@; :  
while(l SortUtil.swap(data,l,r); 7i0;Ss*  
return l; wY{!gQ  
} evro]&N{  
iXD=_^^o .  
} M|IgG:a;T  
M2piJ'T4u  
改进后的快速排序: W&p f%?  
\(`,z}Ht _  
package org.rut.util.algorithm.support; +1>\o|RF  
sUN9E4  
import org.rut.util.algorithm.SortUtil; @jT=SFf  
T&u25"QOf  
/** Y8Z-m (OQ  
* @author treeroot ?V$@2vBVX4  
* @since 2006-2-2 H5/w!y@  
* @version 1.0 J  7]LMw7  
*/ C sx EN4  
public class ImprovedQuickSort implements SortUtil.Sort { Z/+H  
sZ%wQqy~k  
private static int MAX_STACK_SIZE=4096; {PS|q?  
private static int THRESHOLD=10; \$Aw[ 5&t  
/* (non-Javadoc) f@H>by N  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M6:$ 0(r  
*/ @i=_y+|d_  
public void sort(int[] data) { uE^5o\To  
int[] stack=new int[MAX_STACK_SIZE]; Ie'iAY  
jFG Y`9Zw0  
int top=-1; vg-'MG  
int pivot;  Dac ,yW  
int pivotIndex,l,r; >+F +"NAN  
t&nK5p95(  
stack[++top]=0; b0h>q$b  
stack[++top]=data.length-1; F:'>zB]-}  
R:Tv'I1-L  
while(top>0){ j38>5DM6L  
int j=stack[top--]; 7da~+(yhr  
int i=stack[top--]; T~)zgu%q_  
+W#["%kw  
pivotIndex=(i+j)/2; NY\-p=3c7=  
pivot=data[pivotIndex]; WS2@; 8.N  
UjcKvF  
SortUtil.swap(data,pivotIndex,j); ]tc Cr;  
.y2np  
file://partition 0uhIJc'2  
l=i-1; Q0(3ps~H  
r=j; ?RU_SCp-  
do{ ,Laz515  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 2hFOwI  
SortUtil.swap(data,l,r); 4S*7*ak{  
} <c]?  
while(l SortUtil.swap(data,l,r); LhQidvCNJ  
SortUtil.swap(data,l,j); 8rM1kOCf  
@h)X3X  
if((l-i)>THRESHOLD){ b*dEX%H8sf  
stack[++top]=i; Lo uYY: Q  
stack[++top]=l-1; DP=\FG"}x  
} &C.m*^`^  
if((j-l)>THRESHOLD){ * vP:+]  
stack[++top]=l+1; 0&2eiMKG?n  
stack[++top]=j; 0w ;#4X:m  
} w02t9vz  
Ujfs!ikh&F  
} 7!('+x(>  
file://new InsertSort().sort(data); )d7U3i  
insertSort(data); 4<y|SI!  
} Vo(V<2lw}  
/** YA*E93J0  
* @param data G:Cgq\+R  
*/ >|_B=<!99W  
private void insertSort(int[] data) { 4 k y/a1y-  
int temp; Fu"@)xw/-q  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ;1L7+.A  
} A S]jJc^  
} D}L4uz?  
} 5gbD|^ij  
0=c:O  
} 2hF j+Ay  
/V f L(  
归并排序: }W$}blbp  
xT;j_'9U;  
package org.rut.util.algorithm.support; q\T}jF\t  
, \R,O  
import org.rut.util.algorithm.SortUtil; .q_SA-!w>  
HFTDea+#  
/** TDY =!  
* @author treeroot C5&+1VrP  
* @since 2006-2-2 _Rey~]iJJ8  
* @version 1.0 +8|r_z\A5a  
*/ I oFtfb[  
public class MergeSort implements SortUtil.Sort{ vC_O! 2E  
i=j4Wg,{J  
/* (non-Javadoc) brClYpp,h  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xD4G(]d!  
*/ `]m/za%7  
public void sort(int[] data) { =*Y=u6?  
int[] temp=new int[data.length]; ~R\U1XXyUY  
mergeSort(data,temp,0,data.length-1); r:9H>4m  
} ]-tAgNzl%  
5 @61=Au  
private void mergeSort(int[] data,int[] temp,int l,int r){ hSfLNvK  
int mid=(l+r)/2; C^!ej"  
if(l==r) return ; E K#ib  
mergeSort(data,temp,l,mid); eVB.g@%T  
mergeSort(data,temp,mid+1,r); 8`;3`lZ  
for(int i=l;i<=r;i++){ MRL,#+VxA  
temp=data; W!4xE  
} v m)'C C  
int i1=l; H\ONv=}7I  
int i2=mid+1; 'w!8`LPu  
for(int cur=l;cur<=r;cur++){ &{(8EvuDd  
if(i1==mid+1) ~7"6Y ]  
data[cur]=temp[i2++]; ~#V1Gunq  
else if(i2>r) ts~$'^K[-  
data[cur]=temp[i1++]; iMXK_O%  
else if(temp[i1] data[cur]=temp[i1++]; SM8m\c  
else TCS^nBEE  
data[cur]=temp[i2++]; +)QA!g$  
}  =[G)  
} 5"8R|NU:\0  
{GM8}M~D&  
} SWM6+i p  
]#Q'~X W  
改进后的归并排序: FAP1Bm  
Ax"I$6n>  
package org.rut.util.algorithm.support; h2#S ?  
W(&9S[2  
import org.rut.util.algorithm.SortUtil; 32ae? d  
m=p<.%a  
/** 1$a dX  
* @author treeroot +)7Yqh#$  
* @since 2006-2-2 ]6 vqgu  
* @version 1.0 Lmw{ `R  
*/ \~`qE<Q/  
public class ImprovedMergeSort implements SortUtil.Sort { 0&|,HK  
"J (.dg]"  
private static final int THRESHOLD = 10; *) ?Fo  
?5#=Mh#  
/* 8/* 6&#-  
* (non-Javadoc) b1`(f"&l  
* 4<QS ot  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lg!{?xM  
*/ Pw_[{LL  
public void sort(int[] data) { O`W&`B(*k  
int[] temp=new int[data.length]; j2"Y{6c  
mergeSort(data,temp,0,data.length-1); b(McH*_8e  
} GDj ViAFm  
%xWscA%^u  
private void mergeSort(int[] data, int[] temp, int l, int r) {  %Jc>joU  
int i, j, k; x#s=eeP1  
int mid = (l + r) / 2; VIjsz42C  
if (l == r) 58 Rmq/6s  
return; W9ewj:4\0  
if ((mid - l) >= THRESHOLD) sCF7K=a  
mergeSort(data, temp, l, mid); xr\wOQ*`  
else @YfCS8 eH  
insertSort(data, l, mid - l + 1); Cq,hzi-  
if ((r - mid) > THRESHOLD) >4}2~;  
mergeSort(data, temp, mid + 1, r); !^*I?9P  
else <r{ )*]#l  
insertSort(data, mid + 1, r - mid); k(v8zDq*  
* 5Y.9g3)Q  
for (i = l; i <= mid; i++) { KU}HVM{  
temp = data; Kzd`|+?'`M  
} h7H#sL[^  
for (j = 1; j <= r - mid; j++) { 'of5v6:8  
temp[r - j + 1] = data[j + mid]; v|v^(P,o  
} JV#)?/a$z  
int a = temp[l]; H21\6 GY  
int b = temp[r]; 4f?Y'+>Z,  
for (i = l, j = r, k = l; k <= r; k++) { +=bGrn>h  
if (a < b) { &i~AXNw  
data[k] = temp[i++]; De*Z UN|<  
a = temp; n|oAfJUk,  
} else {  T8i9  
data[k] = temp[j--]; ZP& "[_  
b = temp[j]; "wPFQXU  
} "jUr[X2J  
} K$..#]\TM  
} B R-(@  
)2 P4EEs[  
/** 6QOdd 6_d  
* @param data y'<juaw  
* @param l K"sfN~@rT[  
* @param i KR6*)?c`  
*/ NgnHo\)  
private void insertSort(int[] data, int start, int len) { *L9s7RR  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T$'GFA  
} ?wR;"  
} wxg`[c$:  
} RJ_ratKN*g  
} <(Wa8PY2(  
<M1XG7_I  
堆排序: g& *pk5V>  
X]Emz"   
package org.rut.util.algorithm.support; 3?vasL  
QJ ueU%|  
import org.rut.util.algorithm.SortUtil; <~}t;ji  
qG/a5i  
/** t/bDDV"  
* @author treeroot VT\o=3 _  
* @since 2006-2-2 o4b!U%  
* @version 1.0 ogX'3L  
*/ 4><b3r;T'  
public class HeapSort implements SortUtil.Sort{ pX]*&[X?  
{37DrSOa  
/* (non-Javadoc)  S< <xlW  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])  8IH&=3  
*/ gkuI!=  
public void sort(int[] data) { Mc9P(5Bf  
MaxHeap h=new MaxHeap(); _gY so]S^B  
h.init(data); KZL5>E  
for(int i=0;i h.remove(); @$~ BU;kR  
System.arraycopy(h.queue,1,data,0,data.length); FG~p _[K  
} 6$>m s6g%  
N1KYV&'o  
private static class MaxHeap{ SPIYB/C  
<=V2~ asB  
void init(int[] data){ $.}fL;BzVz  
this.queue=new int[data.length+1]; aho;HM$hjP  
for(int i=0;i queue[++size]=data; | %af}# FQ  
fixUp(size); q0 :Lb  
} DsqsMlB{  
} ` BH8v  
k3[ ~I'  
private int size=0; Ou; ]>FJ  
XQ<2(}]4  
private int[] queue; `OnN12`  
n]x4twZ  
public int get() { JBa=R^k  
return queue[1]; YizJT0$  
} mj<(qZh  
{W }.z  
public void remove() { %#NaM\=8v  
SortUtil.swap(queue,1,size--); sb_>D`>  
fixDown(1); +V&b<y;?>  
} ;0}$zy1EZ  
file://fixdown WZRrqrjq  
private void fixDown(int k) { W;,.OoDc>  
int j; pN&Dpz^  
while ((j = k << 1) <= size) { g!7/iKj:  
if (j < size %26amp;%26amp; queue[j] j++; DT(A~U<y  
if (queue[k]>queue[j]) file://不用交换 v|jBRKU99  
break; E`>-+~ZUsk  
SortUtil.swap(queue,j,k); {so"xoA^c  
k = j; K/G|MT)  
} /yIkHb^c   
} /Z>#lMg\.  
private void fixUp(int k) { 'oHtg @  
while (k > 1) {  KEsMes(*  
int j = k >> 1; ~,Q+E8  
if (queue[j]>queue[k]) K(Otgp+zb  
break; C$)#s{*  
SortUtil.swap(queue,j,k); pq>"GEN  
k = j; anA>'63  
} -zHJ#  
} GS~jNZx  
%Md;=,a:6  
} Cdiu*#f  
5_M9T 3  
} ZSYXUFz  
c3!d4mC:  
SortUtil: g`gH]W FcG  
F%6al,8P  
package org.rut.util.algorithm; PR~ho&!  
uI-te~]  
import org.rut.util.algorithm.support.BubbleSort; "sf8~P9qy  
import org.rut.util.algorithm.support.HeapSort; rO 6oVz#x  
import org.rut.util.algorithm.support.ImprovedMergeSort; ;04doub  
import org.rut.util.algorithm.support.ImprovedQuickSort; sxl29y^*  
import org.rut.util.algorithm.support.InsertSort; `#2}[D   
import org.rut.util.algorithm.support.MergeSort; 2#ha Icm"  
import org.rut.util.algorithm.support.QuickSort; rayC1#f  
import org.rut.util.algorithm.support.SelectionSort; ?bQ~ +M\  
import org.rut.util.algorithm.support.ShellSort; Az6f I*yP  
_7]* 5Pxo  
/** >!wX% QHH  
* @author treeroot &K)c*' l  
* @since 2006-2-2 {Rjj  
* @version 1.0 s{KwO+UW  
*/ 6I72;e ^!  
public class SortUtil { 4'?kyTO~  
public final static int INSERT = 1; [Pby  d  
public final static int BUBBLE = 2; pb}QP  
public final static int SELECTION = 3; e!ar:>T  
public final static int SHELL = 4; vz,l{0 v  
public final static int QUICK = 5; .'p_j(uv  
public final static int IMPROVED_QUICK = 6; #G|iEC0C  
public final static int MERGE = 7; <y\>[7Y  
public final static int IMPROVED_MERGE = 8; L$l'wz  
public final static int HEAP = 9; G*mk 19Z  
{Aj}s3v  
public static void sort(int[] data) { d;9 X1`"  
sort(data, IMPROVED_QUICK); QOEcp% 6I}  
} xg/3*rL  
private static String[] name={ 6N:fq  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `K~300-hOb  
}; ;->(hFJt  
5sEq`P}5  
private static Sort[] impl=new Sort[]{  B@A3T8'  
new InsertSort(), TNUzNA  
new BubbleSort(), GTNN4  
new SelectionSort(), nv*q N\i'  
new ShellSort(), QW|,_u5j  
new QuickSort(), vEvVT]g[V  
new ImprovedQuickSort(), 9Rzu0:r.,  
new MergeSort(), &2Q4{i  
new ImprovedMergeSort(), tV9nC   
new HeapSort() SI*O#K=w  
}; w8kp6_i'  
#)tt}GX  
public static String toString(int algorithm){ N{tNe-5  
return name[algorithm-1]; pz6fL=Xd  
} My76]\Psh  
n87B[R  
public static void sort(int[] data, int algorithm) { x;99[C!$  
impl[algorithm-1].sort(data); 7pMrYIP  
} V?t^ J7{'  
YbND2 i  
public static interface Sort { gb|C592R5C  
public void sort(int[] data); 9h<];  
} fl!8\4  
g[0b>r7   
public static void swap(int[] data, int i, int j) { D1;H,  
int temp = data; D?)91P/R  
data = data[j]; u= 5&e)v3  
data[j] = temp; <6)Ogv",  
} &#F>%~<or  
} * h!gjbi  
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