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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。 O=w u0n  
插入排序: gjhWoZV  
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package org.rut.util.algorithm.support; ,daZ KxT  
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import org.rut.util.algorithm.SortUtil; b>"=kN/  
/** PEHaH"|([=  
* @author treeroot s9}VnNr  
* @since 2006-2-2 00(#_($  
* @version 1.0 5_ioJ   
*/ #u6ZCv7u  
public class InsertSort implements SortUtil.Sort{ XveG#oyiU  
6?(vXPpT$  
/* (non-Javadoc) G[!Y6c 3  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mny mV;y"  
*/ Y'%k G5nF  
public void sort(int[] data) { ?g #4&z.  
int temp; =f{YwtG  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); {`CmE/`{  
} / qo`vk A  
} # ~T K C|G  
} Um\_G@  
A/{0J\pA  
} dk4|*l-  
 h2]gA_T`  
冒泡排序: dJwE/s  
![#>{Q4i  
package org.rut.util.algorithm.support; Rt10:9Kz$  
nXnO]wXC  
import org.rut.util.algorithm.SortUtil; l\{{iAC]I  
u4p){|x7s  
/** v22ZwP  
* @author treeroot A('_.J=  
* @since 2006-2-2 O*zF` 9  
* @version 1.0 fA>FU/r  
*/ .kkrU  
public class BubbleSort implements SortUtil.Sort{ KQ(7%W  
F-2&P:sjQ  
/* (non-Javadoc) ' Zmslijf  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z^r  
*/ ~}fQ.F*7R  
public void sort(int[] data) { @$(@64r  
int temp; ~)&im.Q4  
for(int i=0;i for(int j=data.length-1;j>i;j--){ H]/!J]  
if(data[j] SortUtil.swap(data,j,j-1); zV8^Hxl  
} ?h4Rh0rkX  
} %1oG<s  
} $9Yk]~  
} h16i]V  
4(FEfde=  
} C%y!)v_x  
QL4BD93v  
选择排序: Lw!Q*3c  
7 -Yn8Gq  
package org.rut.util.algorithm.support; f.&((z?rC  
Pwh0Se5Z  
import org.rut.util.algorithm.SortUtil; d*{NAq'9X  
V K)%Us-  
/** l /\n7:  
* @author treeroot M;Dk$B{;R  
* @since 2006-2-2 HQO z  
* @version 1.0 '6&a8&:  
*/ 9s}y*Vp  
public class SelectionSort implements SortUtil.Sort { Y +9OP  
j\S}TaH0e  
/* +P?^Yx0d  
* (non-Javadoc) u4UQMj|q  
* rFPfTpS  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \h}a?T6  
*/ P,@ :?6  
public void sort(int[] data) { $rG~0  
int temp; GE{u2<%@  
for (int i = 0; i < data.length; i++) { atA:v3"  
int lowIndex = i; s,|s;w*.  
for (int j = data.length - 1; j > i; j--) { ~Uz1()ftz  
if (data[j] < data[lowIndex]) { :UgCP ~Y  
lowIndex = j; 2l9RU}  
} (;o/2Q?  
} *?GV(/Q  
SortUtil.swap(data,i,lowIndex); T8ftBIOi  
} ^5yFb=2  
} Px<*n '~}  
zz 1e)W/  
} ]VU a $$  
;^K4kK&f  
Shell排序: Mmu>&C\  
LT ZoO9O  
package org.rut.util.algorithm.support; &CEZ+\bA  
"}jY;d#n  
import org.rut.util.algorithm.SortUtil; 17nONhh  
a8Q=_4 l  
/** ,ruL7|T&  
* @author treeroot Bco_\cpt]z  
* @since 2006-2-2 &>. w*  
* @version 1.0 .s)z?31  
*/ jml 4YaGZ  
public class ShellSort implements SortUtil.Sort{ I2$.o0=3Y  
e+t2F |xDh  
/* (non-Javadoc) p+F{iMC  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s}pn5zMp:8  
*/ ,?Bo x  
public void sort(int[] data) { 9. 7XRxR^  
for(int i=data.length/2;i>2;i/=2){ )j[rm   
for(int j=0;j insertSort(data,j,i); *mgK^9<  
} | rDv!m  
} 0Q1s JDa.  
insertSort(data,0,1); rz @;Zn  
} pg%'_+$~m  
pg.z `k  
/** 7fg +WZ  
* @param data 8=%%C:  
* @param j BrQXSN$i  
* @param i P ;#}@/E  
*/ E9L)dMZSpj  
private void insertSort(int[] data, int start, int inc) { D/$$"AT  
int temp; f.4m6"1  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); HJn  
} > %~%O`+  
} *Hnk,?kPq  
} RU1+ -   
\v'\ Ea~  
} N!fTt,  
1qw*mV;W)_  
快速排序: 5+gSpg]i  
YRy5.F%?  
package org.rut.util.algorithm.support; Q@in?};  
1Ue;hu'q:  
import org.rut.util.algorithm.SortUtil; V*m@Rs!)2  
Q9`}dYf.  
/** ]y:ez8RFPU  
* @author treeroot )K4A-9pC  
* @since 2006-2-2 j(`L)/|O  
* @version 1.0 )4hb%U  
*/ )@ /!B`  
public class QuickSort implements SortUtil.Sort{ i5>]$j1/  
yX:*TK4  
/* (non-Javadoc) O+Zt*jN;  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .5',w"R  
*/ GJLlMi  
public void sort(int[] data) { _IA@X. )?  
quickSort(data,0,data.length-1); `(r [BV|h}  
} q@i,$R  
private void quickSort(int[] data,int i,int j){ 5 ,0fL  
int pivotIndex=(i+j)/2; e Akjpc  
file://swap 7n-;++a5]  
SortUtil.swap(data,pivotIndex,j); `@acQs;0  
Qg\OJmv  
int k=partition(data,i-1,j,data[j]); Q.q'pJ-  
SortUtil.swap(data,k,j); ccUq!1  
if((k-i)>1) quickSort(data,i,k-1); ?3Ytn+Py  
if((j-k)>1) quickSort(data,k+1,j); =+T$1  
wz-#kH5?  
} HbRDa  
/** E6{|zF/3'  
* @param data 5AWIk,[  
* @param i vpoeK'bi,  
* @param j c&1:H1#  
* @return qeK_w '  
*/ V Q6&7@ c  
private int partition(int[] data, int l, int r,int pivot) { <$^76=x,8P  
do{ /e^q>>z  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); XNwZSW  
SortUtil.swap(data,l,r); .kl _F7  
} W?5u O  
while(l SortUtil.swap(data,l,r); N{}XHA  
return l; 7j&iHL  
} #|\NG  
nV|H5i;N7  
} eB`7C"Z  
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改进后的快速排序: %"2 ;i@  
IpX>G]"-C  
package org.rut.util.algorithm.support; ^6*2a(S&  
VpDNp (2  
import org.rut.util.algorithm.SortUtil; JsfX&dX0  
O<&8 gk~  
/** ZgN )sVJ  
* @author treeroot *CHLs^)   
* @since 2006-2-2 8y-Sd\0g  
* @version 1.0 zFy0Sz F  
*/ t;7 tuq   
public class ImprovedQuickSort implements SortUtil.Sort { v-;j44sB  
vI<n~FHt  
private static int MAX_STACK_SIZE=4096; >a@c5  
private static int THRESHOLD=10; 9oly=&lJ  
/* (non-Javadoc) 6!|-,t><  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2]Nc@wX`p  
*/ no*p`a *  
public void sort(int[] data) { jl;%?bx  
int[] stack=new int[MAX_STACK_SIZE]; iRo/~(  
'!)|;qe  
int top=-1; }uJH!@j  
int pivot; !ejLqb  
int pivotIndex,l,r; - J9K  
'N?,UtG R  
stack[++top]=0; >tfy\PY:  
stack[++top]=data.length-1; '%@fW:r~  
,O[HX?>  
while(top>0){ jG"n);WF  
int j=stack[top--]; orB8q((  
int i=stack[top--]; ;(cq aB  
/8\gT(@  
pivotIndex=(i+j)/2; 1epj/bB&  
pivot=data[pivotIndex]; ;aJBx  
S&y(A0M  
SortUtil.swap(data,pivotIndex,j); (nWi9(}J  
A.a UWh  
file://partition t(-`==.R  
l=i-1; 86c@Kk7z  
r=j; :wn9bCom?M  
do{ f%Y'7~9bA  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 9%>GOY  
SortUtil.swap(data,l,r); xEt".K  
} ={[s)G  
while(l SortUtil.swap(data,l,r); f; <qGM.#|  
SortUtil.swap(data,l,j); 4{?Djnh  
3g!tk9InG  
if((l-i)>THRESHOLD){ UADD 7d  
stack[++top]=i; oe<9CK:?>  
stack[++top]=l-1; :J|t! `  
} F ] e]  
if((j-l)>THRESHOLD){ =-XI)JV#  
stack[++top]=l+1; 0{0|M8  
stack[++top]=j; ')k n  
} o1x IGP<  
Q/oel'O*x  
} 3<ikMUq&  
file://new InsertSort().sort(data); 7B@[`>5?%L  
insertSort(data); 1'c  
} 0_d,sC?V  
/** )/BI :)  
* @param data jmgU'w-s  
*/ NwH`t#zd  
private void insertSort(int[] data) { s8,{8k  
int temp; U$; FOl  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); AV"fOK;#A  
} v%_5!SR  
} Tx)X\&ij&  
} %d<uOCf\Q  
u{F^Ngy )  
} yi7m!+D3  
Z x9oj  
归并排序: dd+[FU  
=YZyH4eI  
package org.rut.util.algorithm.support; 1Ner1EKGp  
u)]]9G _8  
import org.rut.util.algorithm.SortUtil; Z83A1`!.|  
RcQo1  
/** XU f]gQu3=  
* @author treeroot ^T):\x(  
* @since 2006-2-2 Y|eB;Dm1q  
* @version 1.0 E'|@hL-jn  
*/ CAGaZ rx  
public class MergeSort implements SortUtil.Sort{ .G"UM>.}d  
GtQ$`~r  
/* (non-Javadoc) pkd#SY  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qd@x#"qT  
*/ %1E:rw@  
public void sort(int[] data) { 0/".2(\}T  
int[] temp=new int[data.length]; bVE t?E*+  
mergeSort(data,temp,0,data.length-1); Ood8Qty(  
} K)m\xzT/  
*82f {t]  
private void mergeSort(int[] data,int[] temp,int l,int r){ Ku6bY|  
int mid=(l+r)/2; ?.&]4z([  
if(l==r) return ; >Ux5UD  
mergeSort(data,temp,l,mid); m'|{AjH z6  
mergeSort(data,temp,mid+1,r); w Phs1rL  
for(int i=l;i<=r;i++){ ?nWK s  
temp=data; xHs8']*\  
} Z)RoFD1]C  
int i1=l;  4wLp  
int i2=mid+1; 5v51:g>c  
for(int cur=l;cur<=r;cur++){ ![ & go  
if(i1==mid+1) bERYC|  
data[cur]=temp[i2++]; $S~e"ca1  
else if(i2>r) jD@KG  
data[cur]=temp[i1++]; 2rS|V|d  
else if(temp[i1] data[cur]=temp[i1++]; |Qq_;x]  
else obUX7N  
data[cur]=temp[i2++]; B^W0Ik`m  
} yqdh LX|Mk  
} Jh3(5d"MV  
o $k1&hyH  
} IuJj ;L1  
0~qnwe[g}  
改进后的归并排序: Vz$X0C=W;H  
[12^NEt  
package org.rut.util.algorithm.support; 2Z3c`/k  
_7?LINF9  
import org.rut.util.algorithm.SortUtil; /UG H7srx  
Pb05>J3N  
/** fD8A+aA  
* @author treeroot `mU'{  
* @since 2006-2-2 #!,tId  
* @version 1.0 * A B  
*/ J%ym1A9  
public class ImprovedMergeSort implements SortUtil.Sort { uj@rv&  
W~ 6ii\  
private static final int THRESHOLD = 10; 1b)^5U ;  
:OC`X~}Rc  
/* '%&i#Eb  
* (non-Javadoc) q4)8]Y2  
* V#!ftu#c?  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L_Q1:nL-0  
*/ 'Wv=mBEfZ  
public void sort(int[] data) { Do3;-yp>`  
int[] temp=new int[data.length]; -\mbrbG9H  
mergeSort(data,temp,0,data.length-1); 3c<). aC0f  
} Y|bCbaF  
:-x F=Y(;  
private void mergeSort(int[] data, int[] temp, int l, int r) { KNtsz[#b  
int i, j, k; |2,'QTm=  
int mid = (l + r) / 2; vas   
if (l == r) Xj:?V;  
return; ]d]tQPEU  
if ((mid - l) >= THRESHOLD) D'y/ pv}!  
mergeSort(data, temp, l, mid); 4zyy   
else $xT'cl/IH  
insertSort(data, l, mid - l + 1); ?(Dk{-:T'  
if ((r - mid) > THRESHOLD) RC5b'+E&#  
mergeSort(data, temp, mid + 1, r); (;^VdiJ  
else )M5:aSRz  
insertSort(data, mid + 1, r - mid); kFPZ$8e  
Xrpzc~(  
for (i = l; i <= mid; i++) { +R}(t{b#  
temp = data; > <WR]`G  
} g0@i[&A@{  
for (j = 1; j <= r - mid; j++) { Q>y2C8rnJ/  
temp[r - j + 1] = data[j + mid]; 9;3f`DK@2k  
} [([?+Ouy  
int a = temp[l]; y>zPsc,  
int b = temp[r]; mZ9+.lm  
for (i = l, j = r, k = l; k <= r; k++) { %;0Llxf"  
if (a < b) { /JPyADi  
data[k] = temp[i++]; g`)2I+L7  
a = temp; 0w?\KHT  
} else { 't3/< h<  
data[k] = temp[j--]; -P+( =U  
b = temp[j]; Yn ZV.&4{  
} !@E=\Sm8EV  
} RH+3x7 l  
} 7o?6Pv%HJC  
fDo )~t*~  
/** Bor_Kib  
* @param data ;hsgi|Cy-  
* @param l MrIo.  
* @param i |1`|E- S=  
*/ o ~"?K2@T  
private void insertSort(int[] data, int start, int len) { 8E`rs)A  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .%>UA|[~:  
} "i$Av m  
} j>s> i  
} X^4HYm  
} M|e Qds  
*RKYdwnb  
堆排序: A-:58Qau+  
ZgCG'SU  
package org.rut.util.algorithm.support; $Oa} U3  
 k?|l;6  
import org.rut.util.algorithm.SortUtil; ;c"T#CH.  
eaQ)r?M  
/** Y2i:ZP  
* @author treeroot o@[yF<  
* @since 2006-2-2 ;j]0GD,c$  
* @version 1.0 F$Q( 2:w  
*/ F)4Y;;#  
public class HeapSort implements SortUtil.Sort{ 3P C'P2  
H:x=v4NgsU  
/* (non-Javadoc) b!VaEK  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9j458Yd4*  
*/ tiJY$YqA  
public void sort(int[] data) { >jU.R;H5  
MaxHeap h=new MaxHeap(); l;$HGoJ  
h.init(data); +5(#~  
for(int i=0;i h.remove(); B5"(NJ;  
System.arraycopy(h.queue,1,data,0,data.length); ^]}UyrOn  
} fw@n[u{~  
'6*^s&H~  
private static class MaxHeap{ H8j#rC#&pm  
!gv/jdF  
void init(int[] data){ #)`N  
this.queue=new int[data.length+1]; D2x-Wa  
for(int i=0;i queue[++size]=data; >x0"gh  
fixUp(size); 1au1DvH  
} "\bbe@  
} *"#62U6  
FCxLL"))  
private int size=0; 9:N@+;|T  
HgJ:Rf]  
private int[] queue; +VSJve |  
,a&N1G.  
public int get() { zg,?aAm  
return queue[1]; Rk8>Ak(/  
} a[iuE`  
ur^)bp<n  
public void remove() { 8/X#thG  
SortUtil.swap(queue,1,size--); w=>~pYASH  
fixDown(1); T-pes1Wu  
} v5U\E`)s  
file://fixdown 5tI4m#y2  
private void fixDown(int k) { B:dk>$>uQ  
int j; ! 9B| `  
while ((j = k << 1) <= size) { D. !m*oq  
if (j < size %26amp;%26amp; queue[j] j++; ehQ"<.sQ  
if (queue[k]>queue[j]) file://不用交换 / *J}7  
break; isK~=  
SortUtil.swap(queue,j,k); C=L_@{^Rgb  
k = j; =E@wi?  
} t_1a.Jv  
} k@nx+fO}P  
private void fixUp(int k) { <H3njv  
while (k > 1) { =pQA!u]QE  
int j = k >> 1; *x3";%o  
if (queue[j]>queue[k]) 42mi 7%f  
break; 8:hUj>q x  
SortUtil.swap(queue,j,k); \ } ,="  
k = j; WvVHSa4{  
} .RocENO0  
} N8.K[m  
dOPA0Ja  
} WoGK05w  
p#HbN#^Hy  
} "/6<k0.D&  
z,/0e@B >  
SortUtil: 9{bG @g  
'vKB]/e;  
package org.rut.util.algorithm; gzDH~'8W  
hXr`S4aJ  
import org.rut.util.algorithm.support.BubbleSort; e6n1/TtqM  
import org.rut.util.algorithm.support.HeapSort; 2*:lFv wP  
import org.rut.util.algorithm.support.ImprovedMergeSort; 1jU<]09.  
import org.rut.util.algorithm.support.ImprovedQuickSort; *gRg--PY%  
import org.rut.util.algorithm.support.InsertSort; 2Eg* Yb 1  
import org.rut.util.algorithm.support.MergeSort; ;4<CnC**  
import org.rut.util.algorithm.support.QuickSort; nHxos` Qx  
import org.rut.util.algorithm.support.SelectionSort; Ek\f x*Lz  
import org.rut.util.algorithm.support.ShellSort; c]:sk[u  
EacqQFErl  
/** '^pA%I2D  
* @author treeroot |}zvCD  
* @since 2006-2-2 OU+oS,  
* @version 1.0 m[S6pqz  
*/ -'& 4No  
public class SortUtil { u=B_cA}:  
public final static int INSERT = 1; QF:">G  
public final static int BUBBLE = 2; H'68K8i0  
public final static int SELECTION = 3; p] kpDx[9  
public final static int SHELL = 4; x  8lgDO  
public final static int QUICK = 5; ZzfGs  
public final static int IMPROVED_QUICK = 6; |0nbO2}  
public final static int MERGE = 7; .])ubK_9  
public final static int IMPROVED_MERGE = 8; gI rVrAV#  
public final static int HEAP = 9; 1Y iUf  
NQS@i'W=g  
public static void sort(int[] data) { 7MIu-x|  
sort(data, IMPROVED_QUICK); !%b.k6%>w  
} Yjxa=CD  
private static String[] name={  R~u0!  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DArEIt6Q  
}; G4g <PFx  
jSbO1go#  
private static Sort[] impl=new Sort[]{ is&A_C7yg  
new InsertSort(), s6<`#KFAg  
new BubbleSort(), Gs$<r~Tg  
new SelectionSort(), mlCw(i,  
new ShellSort(), 5P_%Vp`B2  
new QuickSort(), O[[:3!6q  
new ImprovedQuickSort(), h _6QVab@  
new MergeSort(), #iD5& klo\  
new ImprovedMergeSort(), UKyOkuY:w  
new HeapSort() rQT@:$ )  
}; Hb5^+.xur  
V#jFjObTN  
public static String toString(int algorithm){ {'dpRq{c|  
return name[algorithm-1]; |aef$f5  
} hPtSY'_@_  
3c] oU1GfF  
public static void sort(int[] data, int algorithm) { .zr2!}lB  
impl[algorithm-1].sort(data); \wRbhN  
} CU)'x E  
! 7,rz1s73  
public static interface Sort { Th,15H DA  
public void sort(int[] data); v  P8.{$  
} e|Iylv[3  
pUby0)}t  
public static void swap(int[] data, int i, int j) { hKv3;jcd  
int temp = data; UlQZw*ce  
data = data[j]; ]$/TsN  
data[j] = temp; qH'T~# S  
} [B3qZ"  
} m}w~ d /  
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