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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。 @fYVlHT%E  
插入排序: NLY=o@<  
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package org.rut.util.algorithm.support; z4Zm%  
N|$9v{ j_  
import org.rut.util.algorithm.SortUtil; a`n)aXU l  
/** \? )S {  
* @author treeroot erW2>^My  
* @since 2006-2-2 V~[b`&F  
* @version 1.0 ]sqLGmUL  
*/ 4r7F8*z  
public class InsertSort implements SortUtil.Sort{ rAfz?  
u+r!;-0i  
/* (non-Javadoc) Ao8ua|:  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y4 HN1  
*/ #WSqh +  
public void sort(int[] data) { 8 E\zjT!#\  
int temp; qvSYrnpn  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); <+g77NL  
} p$9Aadi]  
} / Qd` ?  
} 6vsA8u(|V#  
eZAMV/]jH  
} '0+~]4&}q  
pQBn8H|Y  
冒泡排序: #| _VN %!  
m..ajYSQ  
package org.rut.util.algorithm.support; Hs'~) T  
n H?6o#]N  
import org.rut.util.algorithm.SortUtil; \hgd&H0UU  
P0}{xq'k9v  
/** =yZq]g6Q  
* @author treeroot Zh;wQCDj  
* @since 2006-2-2 }W8A1-UF  
* @version 1.0 88v8lt;R  
*/ 0>Snps3*Z  
public class BubbleSort implements SortUtil.Sort{ .)b<cH~%  
(cOe*>L;  
/* (non-Javadoc) |Q 3d7y  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &L$9Ii  
*/ ZI!:  
public void sort(int[] data) { 1*u]v{JJ(  
int temp; 7Dbm s(:(  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ]|tg`*l!>  
if(data[j] SortUtil.swap(data,j,j-1); Cjr]l!  
} }x`Cnn  
} @@H_3!B%4v  
} B4RrUA32  
} [w'Q9\,p  
|-}. Y(y  
} \)No?fB  
H%@f ^  
选择排序: 5OI.Ka  
B1)Eo2i#  
package org.rut.util.algorithm.support;  Fb(@i  
bPxL+ +  
import org.rut.util.algorithm.SortUtil; %US&`BT!  
;yomaAr  
/** hz4?ku  
* @author treeroot s6 g"uF>k  
* @since 2006-2-2 [[IMf-]  
* @version 1.0 Pl/ dUt_  
*/ c EYHB1*cT  
public class SelectionSort implements SortUtil.Sort { Gn8 sB  
71R,R,  
/* AhN3~/u%7  
* (non-Javadoc) V'j+)!w5  
* xKSQz  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %m |I=P  
*/ +_7a/3kh  
public void sort(int[] data) { f"FFgQMkv  
int temp; ad: qOm  
for (int i = 0; i < data.length; i++) { .g*N +T6O  
int lowIndex = i; X>[i<ei  
for (int j = data.length - 1; j > i; j--) { (0NffM1  
if (data[j] < data[lowIndex]) { mp8GHV  
lowIndex = j; "5V;~}=S  
} 60!%^O =  
} _eiqs  
SortUtil.swap(data,i,lowIndex); i7.8H*z'  
} rpR yB9  
} tdH[e0x B  
8<C*D".T$  
} 2nkA%^tR  
e%JIqKS  
Shell排序: cpjwc@UMe  
1X2j%q I&  
package org.rut.util.algorithm.support; X 61|:E  
X vaIOt>A  
import org.rut.util.algorithm.SortUtil; (I}owr5:  
*lSu=dk+  
/** _&/`-"3y  
* @author treeroot 0P5VbDv$r7  
* @since 2006-2-2 :'DyZy2Fd  
* @version 1.0 n?@zp<  
*/ bZYayjxZ5i  
public class ShellSort implements SortUtil.Sort{ f(|k0$EIu  
-O *_+8f  
/* (non-Javadoc) 44ty,M3  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #%;Uh  
*/ #BLHHK/[  
public void sort(int[] data) { ;l*%IMB  
for(int i=data.length/2;i>2;i/=2){ ST?{H SCz  
for(int j=0;j insertSort(data,j,i); j?N<40z  
} vkE`T5??  
} zo ?RFn  
insertSort(data,0,1); NuQ!huh  
} |c/=9Bb  
-iR2UE@M  
/** H@uu;:l<7A  
* @param data 2#.s{Bv  
* @param j iM<$ n2t  
* @param i Lm4`O %  
*/ (.:*GUg  
private void insertSort(int[] data, int start, int inc) { 6'^E ],:b  
int temp; D -tRy~}  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); /2Wg=&H  
} x:FZEyalG  
} 8 MO-QO  
} &gp&i?%X9b  
PMytk`<`zw  
} V5K/)\#  
?/o 8f7Z  
快速排序: ZHNL ~=r}  
c~vhkRA  
package org.rut.util.algorithm.support; 9 -pt}U  
a.V5fl0?I@  
import org.rut.util.algorithm.SortUtil; qzZ/%{Ak  
P2'N4?2  
/** D}?p>e|<D  
* @author treeroot lbAhP+B  
* @since 2006-2-2 %V>%AP  
* @version 1.0 }:2##<"\t  
*/ =de'Yy:\-  
public class QuickSort implements SortUtil.Sort{ zGtJ@HbB  
kO\ O$J^S  
/* (non-Javadoc) 5sT3|yq  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,-Hj  
*/ 6k t,q0  
public void sort(int[] data) { :K6JrS  
quickSort(data,0,data.length-1); OyO]; Yk  
} xh2r?K@k>  
private void quickSort(int[] data,int i,int j){ R;!,(l  
int pivotIndex=(i+j)/2; 4 . 7X*1  
file://swap "9_$7.q<y  
SortUtil.swap(data,pivotIndex,j); &3t973=  
KUJLx  
int k=partition(data,i-1,j,data[j]); %+l95Dv1  
SortUtil.swap(data,k,j); $U_(e:m}f  
if((k-i)>1) quickSort(data,i,k-1); zP44 Xhz  
if((j-k)>1) quickSort(data,k+1,j); `E$vWZq}  
o-=|}u]mz  
} q}t]lD %C  
/** _^& q,S  
* @param data b&P)J|Fe  
* @param i "K(cDVQ  
* @param j 1b~21n  
* @return -FJ3;fP&  
*/ 4gen,^Ij  
private int partition(int[] data, int l, int r,int pivot) { F1.Xk1y%  
do{ iE''>Z  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); j,.M!q]  
SortUtil.swap(data,l,r); o-@01_j  
} (vG*)a  
while(l SortUtil.swap(data,l,r); ;O}%SCF7  
return l; Z{B  e  
} I,hw0e  
`PbY(6CF  
} zpwoK&T+  
M[`[+5v  
改进后的快速排序: 0I.KHIB k  
9K@ I  
package org.rut.util.algorithm.support; }? _KZ)  
&b|RoPV  
import org.rut.util.algorithm.SortUtil; r,JQR)l0@V  
P gA<pfEHE  
/** [_JdV(]$  
* @author treeroot q? ">  
* @since 2006-2-2 $rXCNew(  
* @version 1.0 sbmtx/%U  
*/ =_`q;Tu=  
public class ImprovedQuickSort implements SortUtil.Sort { Ss%Cf6qdWL  
+ Tp% *  
private static int MAX_STACK_SIZE=4096; VFf;|PHS  
private static int THRESHOLD=10; ee? d ?:L  
/* (non-Javadoc) 1gV?}'jq  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sMMOZ'bT  
*/ 2OJlE) .  
public void sort(int[] data) { &)OI!^ (  
int[] stack=new int[MAX_STACK_SIZE]; h\[@J rDa  
)8C`EPe  
int top=-1; 08xo_Oysq  
int pivot; nook/7]  
int pivotIndex,l,r; UDI\o1Rbp  
)xy>:2!#Y  
stack[++top]=0; r<ww%2HTS  
stack[++top]=data.length-1; 1Rd|P<y  
U*~-\jN1pb  
while(top>0){ {Phq39g  
int j=stack[top--]; yz K<yvN  
int i=stack[top--]; 6]iU-k0b  
BSMb(EnqX  
pivotIndex=(i+j)/2; [ iTP:8  
pivot=data[pivotIndex]; =Q<VU/  
q7lC}'2fu  
SortUtil.swap(data,pivotIndex,j); )IcSdS0@M  
Gl>\p  
file://partition jVnTpa!A  
l=i-1; i975)_X(  
r=j; Nqj@p<y/q  
do{  `vH|P  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); T */I4"  
SortUtil.swap(data,l,r); 2FuV%\p  
} ]6M<c[H>  
while(l SortUtil.swap(data,l,r); ~qqxHymc  
SortUtil.swap(data,l,j); KfjWZ4{v  
tF),Sn|*  
if((l-i)>THRESHOLD){ b[:,p?:@  
stack[++top]=i; 4tm%F\Izy  
stack[++top]=l-1; "9P @bA  
} _]5UuIMl  
if((j-l)>THRESHOLD){ In1{&sS  
stack[++top]=l+1; R*pPUw\yn  
stack[++top]=j; %j^QK>%  
} 68P'<|u?  
,+df=>$W  
} Z$J-4KN  
file://new InsertSort().sort(data); C"kfxpCi  
insertSort(data); DU6j0lz  
} R{c~jjd  
/** :PBFFLe  
* @param data =!L}/Dl  
*/ vk E]$4P[$  
private void insertSort(int[] data) { J.JD8o9sa  
int temp; zV}:~;w  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); iT&4;W=72~  
} ((`\i=-o5  
} N4;g"k b  
} YT?Lt!cl=  
d,?D '/  
} oF$#7#0`;8  
3:xx:Jt  
归并排序: |a03S Zx  
lZRO"[<  
package org.rut.util.algorithm.support; /TsXm-g#  
,ASNa^7/>  
import org.rut.util.algorithm.SortUtil; Vj4 h#NN$  
Fy\q>(v.  
/** odca?  
* @author treeroot }&+,y<>   
* @since 2006-2-2 wtSU43D  
* @version 1.0 \%r0'1f  
*/ 'AK '(cZ  
public class MergeSort implements SortUtil.Sort{ \dU.#^ryp  
:ILpf+`yY  
/* (non-Javadoc) 1c QF(j_  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5ph CEKt;  
*/ @8{8|P  
public void sort(int[] data) { g%= K rO  
int[] temp=new int[data.length]; P !f{U;B  
mergeSort(data,temp,0,data.length-1); G9-ETj}  
} Z":m(}u O  
o:v_I{  
private void mergeSort(int[] data,int[] temp,int l,int r){ EGI$=Y  
int mid=(l+r)/2; , poc!n//  
if(l==r) return ; kjPf%*3  
mergeSort(data,temp,l,mid); f_PH?  
mergeSort(data,temp,mid+1,r); 9=$ pV==  
for(int i=l;i<=r;i++){ JtY$AP$  
temp=data; 6 8n ;#-X  
} l8(9?!C  
int i1=l; yw:%)b{  
int i2=mid+1; $k )K}U  
for(int cur=l;cur<=r;cur++){ %6@)fRw  
if(i1==mid+1) _)<5c!  
data[cur]=temp[i2++]; |LJv*  
else if(i2>r) c nv%J}wq  
data[cur]=temp[i1++]; bBML +0a  
else if(temp[i1] data[cur]=temp[i1++]; %CnVK1u!  
else 8J&9}@y  
data[cur]=temp[i2++]; ~pp< T  
} q p}2  
} UVLS?1ra  
a0]GQyIG  
} 03)irq%l;  
}@6yROy.  
改进后的归并排序: PW%ith1)<  
bA 0H  
package org.rut.util.algorithm.support; %"c;kvw  
i@6g9\x+  
import org.rut.util.algorithm.SortUtil; jtfC3E,U  
B>'J5bZsw  
/** %!-t7K^mFq  
* @author treeroot gktlwiCZ  
* @since 2006-2-2 n%\\1  
* @version 1.0 + AjV0#n  
*/ GD}rsBQNkJ  
public class ImprovedMergeSort implements SortUtil.Sort { dk1q9Tx  
=>>Dnp  
private static final int THRESHOLD = 10; [7x;H  
":T"Y;  
/* LjGLi>kI~  
* (non-Javadoc) fh_:ung  
* M@q)\UQ'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `ba<eT':  
*/ wp8-(E^  
public void sort(int[] data) { t:lDFv4s  
int[] temp=new int[data.length]; S9[Up}`  
mergeSort(data,temp,0,data.length-1); Dz.kJ_"Ro  
} zN9@.!?X2  
8Dxg6>  
private void mergeSort(int[] data, int[] temp, int l, int r) { c 3| Lk7Q  
int i, j, k; z,C>Rh9Id  
int mid = (l + r) / 2; >d .|I&  
if (l == r) V^D 1:9i  
return; p+Bvfn  
if ((mid - l) >= THRESHOLD) *WzPxQ_  
mergeSort(data, temp, l, mid); LM"b%  
else WH $*\IGJL  
insertSort(data, l, mid - l + 1); #Sg/  
if ((r - mid) > THRESHOLD) <;+QK=f  
mergeSort(data, temp, mid + 1, r); )('{q}JxV  
else  wN0?~  
insertSort(data, mid + 1, r - mid); tx3p, X  
c7?|Tipc  
for (i = l; i <= mid; i++) { -xH3}K%  
temp = data; [daR)C  
} aeLIs SEx  
for (j = 1; j <= r - mid; j++) { {[H#lX 4  
temp[r - j + 1] = data[j + mid]; TxkvHiq2  
} odcrP\S  
int a = temp[l]; ]%Whtj.,x7  
int b = temp[r]; /xA`VyHO  
for (i = l, j = r, k = l; k <= r; k++) { {;UBW7{  
if (a < b) { +x:VIi  
data[k] = temp[i++]; M@.?l=1X  
a = temp; Q6X}R,KA1  
} else { [nsTO5G$u  
data[k] = temp[j--]; eLN(NSPoS  
b = temp[j]; k|_ >I  
} ON_G D"  
} ?0E-Lac=  
} 7 Uu  
BS3BJwf; f  
/** C%Op[H3  
* @param data | -AR)Smt  
* @param l `p^xdj}  
* @param i M^A;tPw  
*/ 1\,wV,  
private void insertSort(int[] data, int start, int len) { GZFLJu  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !3at(+4  
} b(g?X ( &  
} 2ld0w=?+eu  
} .3,Ow(3l  
} $0E_4#kwB  
1T7;=<g`  
堆排序: fNi_C"<  
K* 0]*am|v  
package org.rut.util.algorithm.support; m4T` Tg#P  
Op<|Oz$Q|l  
import org.rut.util.algorithm.SortUtil; J 9k~cz  
^Ul *Nm  
/** gI~jf- w  
* @author treeroot !;C *Wsp}  
* @since 2006-2-2 }NJ? .Y  
* @version 1.0 MU&P+Wr  
*/ G@n%P~  
public class HeapSort implements SortUtil.Sort{ xSHeP`P^X  
h|'T'l&z  
/* (non-Javadoc) $lrq*Nf9c  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9Lxj ]W2^  
*/ NCysYmt  
public void sort(int[] data) { R'r^v  
MaxHeap h=new MaxHeap(); {utIaMb]&v  
h.init(data); sh"\ kk9  
for(int i=0;i h.remove(); mI~k@!3  
System.arraycopy(h.queue,1,data,0,data.length); PUViTb  
} Z-+p+34ytq  
q[SUYb;,  
private static class MaxHeap{ sj@'C@oK  
ojitBo~  
void init(int[] data){ 9WuKW***  
this.queue=new int[data.length+1]; #_bSWV4  
for(int i=0;i queue[++size]=data; Ci ? +Sl  
fixUp(size); &H{KXX"X  
} 8BZDaiE"  
} Y<S,Xr;J:  
(HkMubnqg  
private int size=0; b|*A%?m  
=e,2/Ep{i  
private int[] queue; AjZ@hid  
d(L u|/~  
public int get() { @BN cIJk9  
return queue[1]; #9Z*.  
} q*<Df=+B  
'N0/;k0ax  
public void remove() { *Gm%Dn  
SortUtil.swap(queue,1,size--); P$\vD^  
fixDown(1); V< @]Iv  
} &k?Mt #J  
file://fixdown Rd5r~iT  
private void fixDown(int k) { $vdGkz@6  
int j; J~:/,'Ea  
while ((j = k << 1) <= size) { *~|xj,md  
if (j < size %26amp;%26amp; queue[j] j++; H0s,tTK8  
if (queue[k]>queue[j]) file://不用交换 !_cT_ WHty  
break; TUiXE~8=  
SortUtil.swap(queue,j,k); c)M_&?J!5  
k = j; q7wd96G:  
} >b0e"eGt  
} 'wX'}3_/g  
private void fixUp(int k) { d3(T=9;f2  
while (k > 1) { X .g")Bt7  
int j = k >> 1; l\*}  
if (queue[j]>queue[k]) Db= iJ68  
break; 2|#3rF  
SortUtil.swap(queue,j,k); 59p'Ega.  
k = j; Bj J$I^  
} >b |l6 #%  
} }yU,_:  
(6?pBdZ  
} Srz.-,2PF  
Vl?R?K=`~J  
} s0.yPA  
o_EXbS]C  
SortUtil: #Qy*zU#9  
N Q{ X IN~  
package org.rut.util.algorithm; ?4_^}B9  
M>0=A  
import org.rut.util.algorithm.support.BubbleSort; cu|#AW  
import org.rut.util.algorithm.support.HeapSort; >NW /0'/  
import org.rut.util.algorithm.support.ImprovedMergeSort; +?(2-RBd  
import org.rut.util.algorithm.support.ImprovedQuickSort; yc4mWB~gyU  
import org.rut.util.algorithm.support.InsertSort; -";'l @D=  
import org.rut.util.algorithm.support.MergeSort; M&y!w   
import org.rut.util.algorithm.support.QuickSort; ZqkP# ]+Y'  
import org.rut.util.algorithm.support.SelectionSort; _4rb7"b1  
import org.rut.util.algorithm.support.ShellSort; Y 1Bj++?2  
l@<^V N@  
/** /%rbXrR4w  
* @author treeroot czb(&><  
* @since 2006-2-2 {`KgyC W:  
* @version 1.0 PQXyu1  
*/ lyIstfRh15  
public class SortUtil { 9.lSF  
public final static int INSERT = 1; brNe13d3~"  
public final static int BUBBLE = 2; u sR19_E-  
public final static int SELECTION = 3; rNqJL_!  
public final static int SHELL = 4; X!CLOHVA a  
public final static int QUICK = 5; <=cj)  
public final static int IMPROVED_QUICK = 6; Yiu)0\ o  
public final static int MERGE = 7; ?qw&H /R  
public final static int IMPROVED_MERGE = 8; } ~=53$+  
public final static int HEAP = 9; xh @H@Q\  
Gc4N)oq)}b  
public static void sort(int[] data) { &.=d,XKN  
sort(data, IMPROVED_QUICK); )(\5Wk9(  
} gUL`)t\}*  
private static String[] name={ "a5?cX;  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `wB(J%w  
}; *0l^/jqn:  
_7]5 Q  
private static Sort[] impl=new Sort[]{ C?bPdJ,6  
new InsertSort(), {NKDmeg:D  
new BubbleSort(), 8_Y{7;<ey  
new SelectionSort(), //Hn[wEOh  
new ShellSort(), uc=-+*D'I  
new QuickSort(), KTBsH;6  
new ImprovedQuickSort(), *ta|,  
new MergeSort(), H=Yl @  
new ImprovedMergeSort(), g}$]K! F  
new HeapSort() kd|@.  
}; ^z9ITGB~tV  
o*f7/ZP1o  
public static String toString(int algorithm){ 4eBM/i  
return name[algorithm-1]; 8cfxKUS  
} `"zX<  
}n:'@}  
public static void sort(int[] data, int algorithm) { zJ3{!E}`v  
impl[algorithm-1].sort(data); qK.8^{b  
} R7ZxS  
-g;iMqh#  
public static interface Sort { lY.FmF}k  
public void sort(int[] data); @]Iku6d-  
} 3UslVj1u  
< I8hy$+6  
public static void swap(int[] data, int i, int j) { f/*Xw{s#  
int temp = data; 7$Bq.Lc#z  
data = data[j]; ,hT t]w  
data[j] = temp; -?2ThvT  
} ~BrERUk  
} 5z5#_*)O  
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