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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。 |KMwK png  
插入排序: .Qv H7  
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package org.rut.util.algorithm.support; .ZtW y) U  
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import org.rut.util.algorithm.SortUtil; m7#v2:OD+  
/** e,K.bgi  
* @author treeroot d1qvS@  
* @since 2006-2-2 4'~zuUs  
* @version 1.0 ,J&\) yTP  
*/ \{EYkk0]  
public class InsertSort implements SortUtil.Sort{ iJU=98q  
pN4gHi=  
/* (non-Javadoc) ?hmuAgOtbh  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8wEUly  
*/ XN&cM,   
public void sort(int[] data) { +\R__tx;  
int temp; ]N;\AXZ7  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); gyz_$T@x  
} X,A]<$ACu%  
} %,UTFuM`  
} j 06 mky  
V(5*Dn84  
} }?)U`zF)7}  
hLICu[LC?  
冒泡排序: 0FcG;i+  
cj\?vX\V  
package org.rut.util.algorithm.support; Ul<:Yt&nI  
Y|!m  
import org.rut.util.algorithm.SortUtil; "wR1=&gk  
8l l}"  
/** q o6~)Aws  
* @author treeroot &_$0lI DQ  
* @since 2006-2-2 r_hs_n!6  
* @version 1.0 >ZwDcuJ~Lz  
*/ *djVOC  
public class BubbleSort implements SortUtil.Sort{ ) ^`V{iD  
`iN H`:[w  
/* (non-Javadoc) lyD=n  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U#G<cV79  
*/ 2!_DkE  
public void sort(int[] data) { 8F K%7\V  
int temp; %M,^)lRP  
for(int i=0;i for(int j=data.length-1;j>i;j--){ 6z5wFzJv?q  
if(data[j] SortUtil.swap(data,j,j-1); F};T<#  
} az1#:Go  
} K (,MtY*  
} _Ie?{5$ng`  
} qi*Dd[OG  
&n'@L9v81  
} IhHKRb[  
RT. %\)))  
选择排序: Alk+MwjR  
`t"7[Zk  
package org.rut.util.algorithm.support; f>iDq C4  
cE^Ljk  
import org.rut.util.algorithm.SortUtil; L0)w~F ?m  
N9#5 P!  
/** J9/EJ'My  
* @author treeroot Urz9S3#\  
* @since 2006-2-2 < V*/1{  
* @version 1.0 Y?6}r;<  
*/ ^;sE)L6  
public class SelectionSort implements SortUtil.Sort { bA1O]:`  
>a;LBQ0  
/* )UtK9;@"  
* (non-Javadoc) I|l5e2j  
* PJO.^OsM  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tlM >=s'T  
*/ TkR#Kzv380  
public void sort(int[] data) { cGyR_8:2cv  
int temp; Nwo*tb:  
for (int i = 0; i < data.length; i++) { +|--}iE5n  
int lowIndex = i; 2fgYcQ8`  
for (int j = data.length - 1; j > i; j--) { Zb7%$1)L~  
if (data[j] < data[lowIndex]) { p}Um+I=1  
lowIndex = j; B7wzF"  
} 29^(weT"]  
} e'sS",o*  
SortUtil.swap(data,i,lowIndex); ?kK3%uJy&  
} Ob/i_  
} R7 rO7M !  
=M6{{lI/  
} 5@J]#bp0M  
~3Za"q*0s  
Shell排序: HB,?}S#TP  
h$XoR0  
package org.rut.util.algorithm.support; `-.6;T}2U  
"g*`G<W_s  
import org.rut.util.algorithm.SortUtil; 82 dmlPwJC  
;jJ4H+8  
/** J|F!$m{  
* @author treeroot ?[|A sw1t  
* @since 2006-2-2 "(iDUl  
* @version 1.0 P!SsMo6n  
*/ $:yIe.F  
public class ShellSort implements SortUtil.Sort{ vJ{F)0 K  
F1S0C>N?5  
/* (non-Javadoc) 1(pv 3  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rp4{lHw>C/  
*/ aCJ-T8?'  
public void sort(int[] data) { eE_$ADEf  
for(int i=data.length/2;i>2;i/=2){ IR{XL\WF  
for(int j=0;j insertSort(data,j,i); )gD2wk(  
} F|G v  
} k[}WYs+r  
insertSort(data,0,1); iL!4r]~H  
} vQGv4  
LM(r3sonb  
/** W7c B  
* @param data VN0KK 1 I  
* @param j ^ZIs>.'  
* @param i +^jm_+  
*/ J7sH]  
private void insertSort(int[] data, int start, int inc) { e _(';Lk  
int temp; liqVfB%  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); PI@?I&Bo  
} A<^X P-Nrp  
} 0Y'ow=8M  
} K,6{c^qf  
Ct^=j@g  
} )H`V\ H[0P  
%Eugy  
快速排序: ;n.h!wmJ}  
Nobu= Z  
package org.rut.util.algorithm.support; g<ov` bF  
"[rz*[o8I  
import org.rut.util.algorithm.SortUtil; &grvlK  
E,dUO;  
/** #?`S+YN!q)  
* @author treeroot _#Lq~02 %  
* @since 2006-2-2 ]t~'wL#Z  
* @version 1.0 Mnk-"d  
*/ #|3,DZ|)F  
public class QuickSort implements SortUtil.Sort{ f~,Ml*Zp  
l8J2Xd @   
/* (non-Javadoc) S_ nAO\h  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JIjo^zOXsc  
*/ ?~IdPSY  
public void sort(int[] data) { cv1PiIl  
quickSort(data,0,data.length-1); ,)N/2M\B-  
} H DD)AM&p  
private void quickSort(int[] data,int i,int j){ &EYoviFp  
int pivotIndex=(i+j)/2; >j7]gi(  
file://swap t3g+>U_m  
SortUtil.swap(data,pivotIndex,j); .beqfcj"  
TyA1Qk\  
int k=partition(data,i-1,j,data[j]); BR-wL3x b  
SortUtil.swap(data,k,j); .S1MxZhbP  
if((k-i)>1) quickSort(data,i,k-1); ji\&?%(B  
if((j-k)>1) quickSort(data,k+1,j); Jamt@=  
ho)JY $#6  
} }I MV@z B  
/** ;y{(#X#  
* @param data ?S9vYaA$  
* @param i a@Zolz_Z  
* @param j e2BC2K0  
* @return f`*VNB`  
*/ WgG$ r  
private int partition(int[] data, int l, int r,int pivot) { )#1!%aQ  
do{ 2#00<t\  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 4"3.7.<Q`  
SortUtil.swap(data,l,r); }D?qj3?bj  
} SSbx[<E3  
while(l SortUtil.swap(data,l,r); ^7*7^<  
return l; MslgQmlM  
} Q, "8Ty  
pr1bsrMuL  
} f& \ Bs8la  
LE)$_i8gX  
改进后的快速排序: xX9snSGz  
dz>Jl},`k  
package org.rut.util.algorithm.support; X 5X D1[  
H:9G/Nev  
import org.rut.util.algorithm.SortUtil; S{v]B_N[M  
RnU7|p{  
/** FA;-D5=  
* @author treeroot T$AVMVq  
* @since 2006-2-2 A0RSNAM  
* @version 1.0 FzP1b_i  
*/ 2`%a[t@M.  
public class ImprovedQuickSort implements SortUtil.Sort { hg:$H9\%  
eX lJ=S}  
private static int MAX_STACK_SIZE=4096; *W^a<Zm8>  
private static int THRESHOLD=10; g HkHAOe/  
/* (non-Javadoc) ?Bl/bY$*h  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H'7s`^- >I  
*/ B[6k [Vs  
public void sort(int[] data) { @HSK[[?  
int[] stack=new int[MAX_STACK_SIZE]; ;<;~;od*/  
~R~.D  
int top=-1; @$j u Qm  
int pivot; Pa+_{9  
int pivotIndex,l,r; `u R`O9)e  
cH4 PrMm&  
stack[++top]=0; C^5 V  
stack[++top]=data.length-1; _%Ua8bR$  
OB\ZT@l  
while(top>0){ ]h&1|j1  
int j=stack[top--]; O:a=94  
int i=stack[top--]; >dJ~  
$+ N~Fa  
pivotIndex=(i+j)/2; ^c >Bh[  
pivot=data[pivotIndex]; "wg$ H1K  
#d*gWwnx"  
SortUtil.swap(data,pivotIndex,j); f [.'V1  
E/wxX#]\  
file://partition c#`IF6qj  
l=i-1; V82I%gPF  
r=j; R".$x{{  
do{ dLF*'JjY  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); sWMln:=  
SortUtil.swap(data,l,r); PB.'huu  
} fH?A.JP=a  
while(l SortUtil.swap(data,l,r); HB$?}V  
SortUtil.swap(data,l,j); 12hD*,A5j  
EY3F9h3xM|  
if((l-i)>THRESHOLD){ 4\p%|G^hU  
stack[++top]=i; mk^, {D  
stack[++top]=l-1; dKC*QHU  
} 7:Rt) EE2  
if((j-l)>THRESHOLD){ 3 =c#LUA`  
stack[++top]=l+1; ;m>/tD%  
stack[++top]=j; wfEL .h  
} ~e]B[>PT  
}&v-<qC^  
} HwZl"!;Mry  
file://new InsertSort().sort(data); HC1<zW[  
insertSort(data); nCp_RJu  
} e57R6g)4  
/** <|?)^;R5!  
* @param data ]W4{|%@H"  
*/ _x3=i\O,  
private void insertSort(int[] data) { ($/l_F  
int temp; |HYST`  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); %6rSLBw3  
} V9qA'k  
} Oq,@{V@)9k  
} >;Vfs{Z(q  
j}s/)}n|  
} .taP2^2Z  
G!=(^G@J;  
归并排序: s3yGL  
Skr0WQ  
package org.rut.util.algorithm.support; Yt,MXm\  
^Go,HiB  
import org.rut.util.algorithm.SortUtil; W2fcY;HZ  
=3A4.nW  
/** c2,g %(  
* @author treeroot v_pe=LC{-e  
* @since 2006-2-2 n}e%c B  
* @version 1.0 Im!b-1  
*/ @>.aQE  
public class MergeSort implements SortUtil.Sort{ !L q'o ?  
"\`Fu  
/* (non-Javadoc) 1cMLl6Bp>  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]B3+& g  
*/ 2yZ~j_AF[  
public void sort(int[] data) { :t9![y[=|  
int[] temp=new int[data.length]; XTk :lzFH  
mergeSort(data,temp,0,data.length-1); 0*tnJB  
} MN5}}@  
k\;D;e{  
private void mergeSort(int[] data,int[] temp,int l,int r){ wbcip8<t  
int mid=(l+r)/2; n'{jc 6&|  
if(l==r) return ; x=L"qC9f/  
mergeSort(data,temp,l,mid); /wJ4hHY  
mergeSort(data,temp,mid+1,r); $ BgaLJs/O  
for(int i=l;i<=r;i++){ j6~`C ?(  
temp=data; #a~BigZ[G  
} }cGILH%  
int i1=l; f(eXny@Y  
int i2=mid+1; ';8 ,RTe  
for(int cur=l;cur<=r;cur++){ 5S!j$_(  
if(i1==mid+1) qC"`i}7  
data[cur]=temp[i2++]; tjB)-=j[  
else if(i2>r) dY0W=,X$7T  
data[cur]=temp[i1++]; SqRM*Cf=  
else if(temp[i1] data[cur]=temp[i1++]; YQFz6#Ew  
else =54D#,[B  
data[cur]=temp[i2++]; hCF_pt+  
} F%&lM[N%  
} jPZ+~:m+  
n7~4*B  
} B[EOz\?=m  
;r~1TUKb  
改进后的归并排序: %saP>]o  
DbB<8$  
package org.rut.util.algorithm.support; Gf9sexn]l  
NF4(+E9g  
import org.rut.util.algorithm.SortUtil; !\d~9H%`B  
Xf#;`*5  
/** KehM.c^  
* @author treeroot 7t#Q8u?  
* @since 2006-2-2 I+.U.e^gx  
* @version 1.0 l<4P">M!.  
*/ O43"-  
public class ImprovedMergeSort implements SortUtil.Sort { l59 N0G  
m-tn|m!J  
private static final int THRESHOLD = 10; btnD+O66<  
\),f?f-m  
/* u$zRm(!RB  
* (non-Javadoc) tN4&#YK<  
* Sw; kUJ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fq <JxamR  
*/ I~YV&12  
public void sort(int[] data) { `uk=2k}&m  
int[] temp=new int[data.length]; GYb&'#F~t  
mergeSort(data,temp,0,data.length-1); fK]%*i_"  
} CMbID1M3  
1,$"'lKwt  
private void mergeSort(int[] data, int[] temp, int l, int r) { X[$|I9  
int i, j, k; %g5#q64  
int mid = (l + r) / 2; J!6w9,T_  
if (l == r) >b9J!'G,(  
return; *q,nALs  
if ((mid - l) >= THRESHOLD) Ja 5od  
mergeSort(data, temp, l, mid); g@s`PBF7`  
else ,YBO}l  
insertSort(data, l, mid - l + 1); ,ZrR*W?iF  
if ((r - mid) > THRESHOLD) "K9[P :nw  
mergeSort(data, temp, mid + 1, r); Wf5;~RJC?  
else p< 0=. ~  
insertSort(data, mid + 1, r - mid); -EFdP]XO  
#6YpV)  
for (i = l; i <= mid; i++) { Hf1b&8&:K  
temp = data; m{Uh{G$  
} :BV$3]y  
for (j = 1; j <= r - mid; j++) { nVgvn2N/  
temp[r - j + 1] = data[j + mid]; ZnAQO3%y  
} d/Wp>A@dob  
int a = temp[l]; W-|C K&1  
int b = temp[r]; <P0 P*>M  
for (i = l, j = r, k = l; k <= r; k++) { "[fPzIP9  
if (a < b) { YryMB,\  
data[k] = temp[i++]; !T:7xEr  
a = temp; 4Y3@^8h&=  
} else { xhho{  
data[k] = temp[j--]; ]}l.*v\uK  
b = temp[j]; j1->w8  
} W+=j@JY}q9  
} hS &H*  
} g@M5_I(W  
<3N\OV2  
/** j x< <h _j  
* @param data o+ {i26%  
* @param l '~f*O0_  
* @param i Ei+lVLoC  
*/ ht6}v<x.eA  
private void insertSort(int[] data, int start, int len) { 6(htpT%J  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NJd4( P  
} VyYrL]OrA  
} $6 Hf[(/e  
} t.RDS2N|  
} c2 :,  
e&8Meiv+d  
堆排序: NRP) 'E  
 lFcHE c  
package org.rut.util.algorithm.support; A/}[Z\C  
~Eik&5 z  
import org.rut.util.algorithm.SortUtil; CKFr9bT{  
Iix:Y}  
/** {&D$U'ye  
* @author treeroot 76o[qay  
* @since 2006-2-2 -Q Mwtr#q}  
* @version 1.0 G)b:UJa"  
*/ +8 \?7,FY  
public class HeapSort implements SortUtil.Sort{ EW4a@  
IUh9skW5  
/* (non-Javadoc) ^2%)Nq;O  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9{S$%D  
*/ }uaFmXy3  
public void sort(int[] data) { yV L >Ie/  
MaxHeap h=new MaxHeap(); . 8ikcs  
h.init(data); ^!k_"C)B  
for(int i=0;i h.remove(); H=WB6~8)  
System.arraycopy(h.queue,1,data,0,data.length); ?5lO1(  
} IIXA)b!  
&,Loqr  
private static class MaxHeap{ [J eq ?X9  
5S&Qj7kr  
void init(int[] data){ yLXIjR  
this.queue=new int[data.length+1]; Xq37:E2  
for(int i=0;i queue[++size]=data; /4+zT?f  
fixUp(size); I~p*~mLh'  
} 2Q%M2Ua  
} ds+2z=!!e  
}z\t}lven  
private int size=0; ' Gx\  
*M:p[.=1  
private int[] queue; !{(crfXB  
QFhyidm=]  
public int get() { Pd d(1K*  
return queue[1]; 3^q9ll7Op  
} YbWz!.WPe  
`-b{|a J  
public void remove() { aYpc\jJ  
SortUtil.swap(queue,1,size--); C9k"QPE  
fixDown(1); \7xc*v [  
} yEJ3O^(F  
file://fixdown (~F}O  
private void fixDown(int k) { J &=5h.G$  
int j; D?* du#6  
while ((j = k << 1) <= size) { sH1 ucZ>9Y  
if (j < size %26amp;%26amp; queue[j] j++; VTDnh*\5  
if (queue[k]>queue[j]) file://不用交换 e,#5I(E  
break; H D$`ZV  
SortUtil.swap(queue,j,k); A93(} V7I  
k = j; 6wq%4RI0  
} p`U#  
} ~fcC+"7q/  
private void fixUp(int k) { lY,9bSF$  
while (k > 1) { QP!;Gwqr  
int j = k >> 1; 1{cF/ :o  
if (queue[j]>queue[k]) lSd tw b  
break; :c )R6=v  
SortUtil.swap(queue,j,k); UaQW<6+  
k = j; e9S*^2;  
} U%VFr#  
} hmb=_W  
?,hGKSC  
} z [u!C/  
N5cC!K  
} z?`7g%Z?{  
-(%Xq{  
SortUtil: e(DuJ-  
0s}gg[lj  
package org.rut.util.algorithm; {ynI]Wj`L  
v6x jLP;O  
import org.rut.util.algorithm.support.BubbleSort; 33hP/p%  
import org.rut.util.algorithm.support.HeapSort; m#6p=E  
import org.rut.util.algorithm.support.ImprovedMergeSort; ~e){2_J&n  
import org.rut.util.algorithm.support.ImprovedQuickSort; yC|odX#  
import org.rut.util.algorithm.support.InsertSort; w`#9Re  
import org.rut.util.algorithm.support.MergeSort; 56NDU>j$  
import org.rut.util.algorithm.support.QuickSort; 7s:cg  
import org.rut.util.algorithm.support.SelectionSort; 2AxKB+c1`  
import org.rut.util.algorithm.support.ShellSort; a~-k} G5  
%^"i\- *|S  
/** 4m~p(r  
* @author treeroot kqC7^x  
* @since 2006-2-2 S|yDGT1  
* @version 1.0 dOg c%(kz  
*/ mwz!7Q   
public class SortUtil { UK@hnQU8`  
public final static int INSERT = 1; EW]8k@&g  
public final static int BUBBLE = 2; ~1,$  
public final static int SELECTION = 3; d1*0?GTT  
public final static int SHELL = 4; 4}YHg&@\d%  
public final static int QUICK = 5; O=!EqaExW  
public final static int IMPROVED_QUICK = 6; LR"7e  
public final static int MERGE = 7; D42!#  
public final static int IMPROVED_MERGE = 8; |*]<*qnZt  
public final static int HEAP = 9; |oR{c%z05  
brF) %x`  
public static void sort(int[] data) { nnd-d+$  
sort(data, IMPROVED_QUICK); y,<\d/YY@  
} $B%3#-  
private static String[] name={ AX )dZdd  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BBl9<ne$  
}; Fj <a;oV  
v}^uN+a5  
private static Sort[] impl=new Sort[]{ v?DA>  
new InsertSort(), "(\]-%:7  
new BubbleSort(), x.(Sv]+[  
new SelectionSort(), zj1_#=]  
new ShellSort(), pM!cF  
new QuickSort(), <2I<Z'B,e  
new ImprovedQuickSort(), Et)j6xz/F  
new MergeSort(), 8..g\ZT  
new ImprovedMergeSort(), }.<]A  
new HeapSort() s8r[U, }(  
}; }\ya6Gi8  
R}OjSiS\  
public static String toString(int algorithm){ w~e$ul(IQM  
return name[algorithm-1]; 6ZGw 3p)  
} 5@i(pVWZ  
r"KW\HN8  
public static void sort(int[] data, int algorithm) { >T29kgF2  
impl[algorithm-1].sort(data); Rd1I$| Y  
} {8~xFYc:  
!OR %AdxB  
public static interface Sort { 0'`#I  
public void sort(int[] data); nh"LdHqiDB  
} %#lJn.o  
j5 W)9HW:  
public static void swap(int[] data, int i, int j) { {w9GMqq  
int temp = data; 1-pxM~Y  
data = data[j]; tW3Nry  
data[j] = temp; o{K#LP  
} 1tCe#*|95  
} nqib`U@"  
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