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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。 &?gcnMg$,J  
插入排序: x/0x&la  
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package org.rut.util.algorithm.support; OSom-?|w  
P8tCzjrV  
import org.rut.util.algorithm.SortUtil; jT;'T$  
/** v~p?YYOm<  
* @author treeroot !u`f?=s;  
* @since 2006-2-2 O_5;?$[m  
* @version 1.0 e0#{'_C  
*/ DnN+W  
public class InsertSort implements SortUtil.Sort{ "k),;1  
j}8^gz]  
/* (non-Javadoc) }Fu2%L>  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t=[/L]!  
*/ YG>Eop  
public void sort(int[] data) { Ra C6RH  
int temp; D^{jXNDNO  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); >as+#rz1p  
} [y<s]C6E  
} <FN +  
} ](IOn:MuDE  
#!rH}A>n+  
} |6`7kb;p  
h5^We"}+  
冒泡排序: Q"qJ0f)  
jank<Q&w  
package org.rut.util.algorithm.support; j\.e6&5%SS  
^Je*k)COn  
import org.rut.util.algorithm.SortUtil; D9n+eZ  
9YBlMf`KEf  
/** 9,}Z1 f\%  
* @author treeroot 0+A#k7c6p  
* @since 2006-2-2 f1d<xGx  
* @version 1.0 _ CzAv%  
*/ aecvz0}@R  
public class BubbleSort implements SortUtil.Sort{ EE qlsH  
0BOL0<Wq  
/* (non-Javadoc) t V7{j'If  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cr^R9dv  
*/ "7?xaGh8  
public void sort(int[] data) { 1+tPd7U  
int temp; ^SwU]e  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ikPr>  
if(data[j] SortUtil.swap(data,j,j-1); J/[PA[Rf  
} % <h2^H\O  
} V. o*`V  
} J!'IkC$>  
} >Q)S-4iR  
g G|4+' t  
} 4&~*;an7  
YIYuqtnSJ  
选择排序: >EgMtZ88.<  
W7IAW7w8U  
package org.rut.util.algorithm.support; rE\&FVx  
*`tQX$F  
import org.rut.util.algorithm.SortUtil; U.|0y=  
t 9_&n.z  
/** CY)[{r  
* @author treeroot EhN@;D+  
* @since 2006-2-2 L_IvR 4:j~  
* @version 1.0 >lugHF$G  
*/ X`I=Z ysB  
public class SelectionSort implements SortUtil.Sort { &2W`dEv]?  
}BCxAwD4  
/* n$"B F\eM  
* (non-Javadoc) !,*Uvs@b  
* 2}ywNVS  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L_>LxF43  
*/ v)'Uoe"R%  
public void sort(int[] data) { ay28%[Q b4  
int temp; JOki4N  
for (int i = 0; i < data.length; i++) { <Oj'0NK-  
int lowIndex = i; ?j} Fxr  
for (int j = data.length - 1; j > i; j--) { oMN Qv%U  
if (data[j] < data[lowIndex]) { e#?rK=C?9  
lowIndex = j; X-%91z:o58  
} LM".]f!,  
} XJ3aaMh"  
SortUtil.swap(data,i,lowIndex); hrbeTtqi  
} yGb^kR}d  
} "K*^%{  
6x8lnXtA  
} qp]s VY  
4WQ 96|F  
Shell排序: YMn=9EUp  
FFf ~Vmw  
package org.rut.util.algorithm.support; d,t'e?  
S,C/l1s  
import org.rut.util.algorithm.SortUtil; Zb~G&. 2g  
V}4u1oG  
/** g^:7mG6C  
* @author treeroot Zor Q2>  
* @since 2006-2-2 !(N,tZ  
* @version 1.0 LeMo")dk\  
*/ jL~. =QD  
public class ShellSort implements SortUtil.Sort{ vn96o] n  
SJ:Wr{ Or3  
/* (non-Javadoc) 0U:9&j P,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1.j;Xo/+:V  
*/ 8#a2 kR<b  
public void sort(int[] data) { $yMNdBI[  
for(int i=data.length/2;i>2;i/=2){ ;3sJ7%`v  
for(int j=0;j insertSort(data,j,i); x]:B3_qR  
} B{Lcx~  
} |JCn=v@  
insertSort(data,0,1); P/dT;YhL  
} "J3n_3+  
<t.  w(?  
/** RSf*[2  
* @param data l' a<k"  
* @param j /I q6'oo  
* @param i g U v`G  
*/ HQ3kxOT  
private void insertSort(int[] data, int start, int inc) { +*$@ K'VL  
int temp; rcjj( C  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); `,FvYA"  
} 4i Z7BD  
} |_wbxdq  
} `"j_]  
Iy {&T#e"  
} X FvPc  
eX{Tyd{  
快速排序: @{8SC~ha  
Qx[ nR/  
package org.rut.util.algorithm.support; C.{z+  
]WC@*3'kye  
import org.rut.util.algorithm.SortUtil; j;i7.B"[  
Dad*6;+N  
/** V?Ye^ -29  
* @author treeroot K#'{Ko  
* @since 2006-2-2 a(eUdGJ  
* @version 1.0 hjY)W;  
*/  =u Ieur  
public class QuickSort implements SortUtil.Sort{ FtxmCIVIV~  
bA3pDt).p  
/* (non-Javadoc) gA:N>w&<X  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JUC62s#_z  
*/ ;=?KQq f  
public void sort(int[] data) { Kyq/o-  
quickSort(data,0,data.length-1); :jljM(\  
} LXcH<)  
private void quickSort(int[] data,int i,int j){ 4w0Y(y  
int pivotIndex=(i+j)/2; [ncOtDE  
file://swap  Q ,)}t  
SortUtil.swap(data,pivotIndex,j); Nn|~ :9#  
/s^O M`5  
int k=partition(data,i-1,j,data[j]); 1$ ~W~O  
SortUtil.swap(data,k,j); C<\O;-nHH  
if((k-i)>1) quickSort(data,i,k-1); }\)O1  
if((j-k)>1) quickSort(data,k+1,j); ]!04L}hy|P  
i.*Utm`1"e  
} '-m )fWf  
/** GOhGSV#  
* @param data F;_L/8Ov1  
* @param i ?W4IAbT\G  
* @param j :g=z}7!s  
* @return Ym "Nj  
*/ X'h J&-[P  
private int partition(int[] data, int l, int r,int pivot) { K~Hp%.  
do{ @-Js)zcl q  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); m>@ *-*8k  
SortUtil.swap(data,l,r); MUU9IMFJ  
} dzPwlCC%-  
while(l SortUtil.swap(data,l,r); Z2u5n`K  
return l; 2kU=9W6ND  
} #97w6,P+  
f_GqJ7Gk]  
} 6@@J>S>  
H{3A6fb<  
改进后的快速排序: :If1zB)  
wWR9dsB.;  
package org.rut.util.algorithm.support; @9<MW  
K\]ey;Bd  
import org.rut.util.algorithm.SortUtil; RtVG6'Y  
hZ@Wl6FG;  
/** #x;i R8^  
* @author treeroot 3mnq=.<(w  
* @since 2006-2-2 ?1u2P$d  
* @version 1.0 (lY< \l  
*/ ^}4=pkJ;s  
public class ImprovedQuickSort implements SortUtil.Sort { bl;C=n  
ngoAFb  
private static int MAX_STACK_SIZE=4096; e$+?l~  
private static int THRESHOLD=10; O0i[GCtP5  
/* (non-Javadoc) %XieKL  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 71ctjU`U2  
*/ H%:~&_D  
public void sort(int[] data) { n/fMq,<8  
int[] stack=new int[MAX_STACK_SIZE]; 1]uHaI(  
_n;V iQMu  
int top=-1; 3G7Qo  
int pivot; OK}+:Y  
int pivotIndex,l,r; Zn`vL52_  
HXTZ`'Rv  
stack[++top]=0; W\?_o@d  
stack[++top]=data.length-1; 7Bhi72&6  
c`(]j w  
while(top>0){ g&30@D"  
int j=stack[top--]; mw1|>*X&R  
int i=stack[top--]; kU5chltGF  
<ZV !fn  
pivotIndex=(i+j)/2; :3# t;  
pivot=data[pivotIndex]; ;-1yG@KG  
,nELWzz%{  
SortUtil.swap(data,pivotIndex,j); nRmZu\(Ow|  
Dog Tj  
file://partition 6R+m;'  
l=i-1; $(ugnnJ*  
r=j; Jn_;  cN  
do{ *hp3w  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); W:^\Oe5&a  
SortUtil.swap(data,l,r); PKhH0O\_U  
} jz_\B(m9%  
while(l SortUtil.swap(data,l,r); mG!Rh  
SortUtil.swap(data,l,j); (bk~,n_  
TrHz(no  
if((l-i)>THRESHOLD){ H *gF>1  
stack[++top]=i; G#&R/Tc5N  
stack[++top]=l-1; G:e 9}  
} %hzl3>().  
if((j-l)>THRESHOLD){ x7=5 ;gf/X  
stack[++top]=l+1; rQ^$)%uP  
stack[++top]=j; Ub8|x]ix  
} DV(^h$1_  
XO*62 >Ed  
} JR1/\F<}  
file://new InsertSort().sort(data); 85<zl|ZD  
insertSort(data); OE(Z)|LF  
} D<zgs2Ex  
/** 3sf+ uoV  
* @param data >900O4  
*/ IGj%)_W  
private void insertSort(int[] data) { bojx:g  
int temp; q1Vh]d  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); i6p0(OS&D  
} -o\r]24  
}  2L~[dn.s  
} j"aimjqd3  
ei>8{v&g  
} h5-<2B|  
tc%?{W\  
归并排序: }>\+eG  
c[4  H  
package org.rut.util.algorithm.support; !Qu)JR  
:_%  
import org.rut.util.algorithm.SortUtil; ^h z4IZ^  
gOpGwpYZ,  
/** er Cl@sq  
* @author treeroot !tkP!%w  
* @since 2006-2-2 2G'Au}q0n  
* @version 1.0 wD-(3ZVd4  
*/ aO9a G*9T  
public class MergeSort implements SortUtil.Sort{ Z?H#=|U  
,ufB*[~  
/* (non-Javadoc) GVT+c@Gx  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *%^Vq  
*/ iol.RszlZ|  
public void sort(int[] data) { &y?L^Aq  
int[] temp=new int[data.length]; FTx&] QN?  
mergeSort(data,temp,0,data.length-1); Y3+GBqP  
} jrGVC2*rD  
)E<<  
private void mergeSort(int[] data,int[] temp,int l,int r){ 1>$ fLbmkI  
int mid=(l+r)/2; 6>! ;g'k  
if(l==r) return ; ho#]i$b}f2  
mergeSort(data,temp,l,mid); MXWCYi  
mergeSort(data,temp,mid+1,r); ;Jex#+H(:D  
for(int i=l;i<=r;i++){ V&x6ru#  
temp=data; 2 w2JFdm  
} Dz4fP;n  
int i1=l; ~ l~ai>/  
int i2=mid+1;  }xcEWC\  
for(int cur=l;cur<=r;cur++){ DW ^E46k)A  
if(i1==mid+1) t =ErJ  
data[cur]=temp[i2++]; LEoL6ga  
else if(i2>r) N`7) 88>w  
data[cur]=temp[i1++]; >E&m Np  
else if(temp[i1] data[cur]=temp[i1++]; \vVGfG?6  
else zmH8#  
data[cur]=temp[i2++]; kK]JN  
} /xmUu0H$R  
} >1[Hk0 <x  
Fa`/i v  
} wV- kB4^4  
/79_3;^  
改进后的归并排序: 9*gD;)!  
PT7L65  
package org.rut.util.algorithm.support; E\2|  
)J&1uMp{  
import org.rut.util.algorithm.SortUtil; FI1R7A  
q(0V#kKC  
/** hX\z93an  
* @author treeroot eqK6`gHa6  
* @since 2006-2-2 B[:-SWd  
* @version 1.0 w) o^?9T  
*/ d(RSn|[0  
public class ImprovedMergeSort implements SortUtil.Sort { u|l]8T9L  
kYwk'\s  
private static final int THRESHOLD = 10; !ydJ{\;  
l$$N~FN  
/* VU7x w  
* (non-Javadoc) k H Y  
* $+eDoI'f  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^&iUC&8W  
*/ +Z0@z^6\  
public void sort(int[] data) { ,/n<Qg"`  
int[] temp=new int[data.length]; <X}@afS  
mergeSort(data,temp,0,data.length-1); L4I1nl  
} zG|}| //}  
iGmBG1a\  
private void mergeSort(int[] data, int[] temp, int l, int r) { -=aI!7*"$  
int i, j, k; *k:Sg*neVq  
int mid = (l + r) / 2; RX.n7Tb  
if (l == r) trL:qD+{(  
return; UTw f!  
if ((mid - l) >= THRESHOLD) HMbF#!E  
mergeSort(data, temp, l, mid); V3O<l}ak  
else ^v. ~FFK  
insertSort(data, l, mid - l + 1); X(F 2 5  
if ((r - mid) > THRESHOLD) W]p)}#FR  
mergeSort(data, temp, mid + 1, r); 0\f3La  
else Vt-D8J\A 0  
insertSort(data, mid + 1, r - mid); kIS_ 6!  
$ BV4i$  
for (i = l; i <= mid; i++) { :hYV\8 $  
temp = data; z-*/jFE  
} .Cfi/  
for (j = 1; j <= r - mid; j++) { n:cre}0.  
temp[r - j + 1] = data[j + mid]; SXn\k;F<  
} @l~zn%!X  
int a = temp[l]; |) {)w`  
int b = temp[r]; s u]x  
for (i = l, j = r, k = l; k <= r; k++) { J1kG'cH05  
if (a < b) { )8Defuxk  
data[k] = temp[i++]; J%c4-'l  
a = temp; '1]Iu@?  
} else { JiL%1y9|  
data[k] = temp[j--]; Pl4$`Qw#y  
b = temp[j]; OM,-:H,  
} B>, O@og  
} Op^r}7  
} $OK}jSH*v)  
%lsk> V  
/** a=3?hVpB  
* @param data /*DC`,q  
* @param l rJ)O(  
* @param i AZ~= ]1  
*/ =H&@9=D*  
private void insertSort(int[] data, int start, int len) { ?k)(~Y&@p  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Yoy}Zdu}h  
} _Wn5* Pi%Z  
} -gZI^EII  
} U  JO  
} P+r -t8  
p3Uus''V4  
堆排序: uXPvl5(Y?  
kWs"v6B  
package org.rut.util.algorithm.support; ;2X/)sxWz  
h^#K4/  
import org.rut.util.algorithm.SortUtil; yZJR7+  
wmh[yYWc  
/** :|i jCg+  
* @author treeroot umV5Y`  
* @since 2006-2-2 / 0Z_$Q&e  
* @version 1.0 cX'&J_T+  
*/ c%,~1l  
public class HeapSort implements SortUtil.Sort{ *G)=6\  
jFYv4!\ju  
/* (non-Javadoc) %,Fx qw  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ][R#Q;y<  
*/ NQCJ '%L6  
public void sort(int[] data) { wIT0A-Por4  
MaxHeap h=new MaxHeap(); NYb eIfL  
h.init(data); 4#H~g @  
for(int i=0;i h.remove(); K1c@]]y)  
System.arraycopy(h.queue,1,data,0,data.length); TqURYnNd  
} rdd%"u+  
SenDJv00  
private static class MaxHeap{ 8':^tMd  
=sVB.P  
void init(int[] data){ F6 ?4E"d  
this.queue=new int[data.length+1]; ,#Y>nP0  
for(int i=0;i queue[++size]=data; 595P04  
fixUp(size); J6}J/  
} 'Dl31w%:  
} (vHB`@x  
;<qv-$P  
private int size=0; RM2<%$  
G5~ Jp#uA  
private int[] queue; :p^7XwX%w  
X.V6v4  
public int get() { XBi}hT  
return queue[1]; Gb]t%\  
} nRKh|B)  
4?GW]'d  
public void remove() { W| S{v7[l  
SortUtil.swap(queue,1,size--); &sJZSrk|  
fixDown(1); M7rVH\:[-  
} Ic_>[E?k  
file://fixdown (h;4irfX  
private void fixDown(int k) { /$v0Rq9  
int j; `4V_I%lJ&  
while ((j = k << 1) <= size) { $ K>.|\  
if (j < size %26amp;%26amp; queue[j] j++; y#-mj,e  
if (queue[k]>queue[j]) file://不用交换 OmO/x  
break; 9Yg=4>#$  
SortUtil.swap(queue,j,k); I8=p_Ie  
k = j; S i[:l  
} FF]xwptrx  
} -z"=d<@  
private void fixUp(int k) { Vo*38c2  
while (k > 1) { ^^MVd@,i  
int j = k >> 1; Lw EI   
if (queue[j]>queue[k]) + D ,Nd=/  
break; Y0`=h"g  
SortUtil.swap(queue,j,k); \%fl`+`  
k = j; EMy Med_  
} "/v{B?~%!  
} ~4HS 2\  
*z-Mr~ V  
} 'urn5[i  
Jr/|nhGl5  
} 4N&4TUIM  
te e  
SortUtil: a`XXz  
^ ,`;x  
package org.rut.util.algorithm; tz{W69k+  
Lyjt$i W%  
import org.rut.util.algorithm.support.BubbleSort; /(#;(]  
import org.rut.util.algorithm.support.HeapSort; gWcl@|I;\  
import org.rut.util.algorithm.support.ImprovedMergeSort; yEm[C(gZ  
import org.rut.util.algorithm.support.ImprovedQuickSort; $ f`\TKlN  
import org.rut.util.algorithm.support.InsertSort; mx`C6G5  
import org.rut.util.algorithm.support.MergeSort; 4c"x&x|  
import org.rut.util.algorithm.support.QuickSort; zqqu7.`  
import org.rut.util.algorithm.support.SelectionSort; vMBF7Jfx  
import org.rut.util.algorithm.support.ShellSort; ?2D1gjr  
D@ :w/W  
/** C(( 7  
* @author treeroot sB|>\O#-  
* @since 2006-2-2 rVU::C+-  
* @version 1.0 wBr$3:  
*/  iC]=S}  
public class SortUtil { FGzMbi<l#(  
public final static int INSERT = 1; BJzNh>-#=  
public final static int BUBBLE = 2; e))fbv&V  
public final static int SELECTION = 3; 3 K Y-+ k  
public final static int SHELL = 4; .<Y7,9;YEF  
public final static int QUICK = 5; 1k&**!S]%  
public final static int IMPROVED_QUICK = 6; qcYF&  
public final static int MERGE = 7; y%* hHnGd  
public final static int IMPROVED_MERGE = 8; YKF5|;}  
public final static int HEAP = 9; H=2sT+Sp  
gJYB)LjH"  
public static void sort(int[] data) { e C\;n  
sort(data, IMPROVED_QUICK); 2%0J/]n\A"  
} PGTi-o}  
private static String[] name={ {pEay|L_  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m0I/X$-Cl5  
}; O>P792)  
)TNAgTmqK  
private static Sort[] impl=new Sort[]{ @f<q&K%FJ  
new InsertSort(), <pAN{:  
new BubbleSort(), y7[D9ZvZ  
new SelectionSort(), !/pE6)a  
new ShellSort(), t?& a?6:J  
new QuickSort(), 1=fP68n  
new ImprovedQuickSort(), -rC_8.u :  
new MergeSort(), KMFvi_8  
new ImprovedMergeSort(), RzPqtN  
new HeapSort() *;(wtMg  
}; r`? bYoz  
 U/v }4b  
public static String toString(int algorithm){ tbbZGyg5b  
return name[algorithm-1]; v(uYso_  
} v;=F $3  
6y;R1z b  
public static void sort(int[] data, int algorithm) { bUR; d78  
impl[algorithm-1].sort(data); O3Jp:.ps  
} yXg #<H6V  
DI/yHs  
public static interface Sort { 5i 56J1EC  
public void sort(int[] data); CxyL'k  
} 4~;x(e@S  
@m*^v\q<u  
public static void swap(int[] data, int i, int j) { J!l/!Z>!cF  
int temp = data; }= )  
data = data[j]; zCOzBL/1q  
data[j] = temp; g\%vkK&I  
} D]NfA2B7  
} eUa2"=M  
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