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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。 n]v7V&mj\  
插入排序: @mNJ=mEV  
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package org.rut.util.algorithm.support; *i@T!O(1)M  
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import org.rut.util.algorithm.SortUtil; y1#O%=g  
/** \lW_f{X)  
* @author treeroot 7`dY1.rq  
* @since 2006-2-2 _ eiF@G  
* @version 1.0 8%-%AWF]  
*/ Hd374U<8]T  
public class InsertSort implements SortUtil.Sort{ BGzO!s*@j  
hlC%HA  
/* (non-Javadoc) ]-a{IWVN  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FT( iX `YQ  
*/ ZV( w  
public void sort(int[] data) { H-2_j  
int temp; 9n 6fXOC  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 3q?5OL^$  
} )88nMH-  
} vhpvO >Q  
} 0bSz4<}  
e#khl9j*bt  
} Wcn[gn<  
[ f34a  
冒泡排序: ^K;hn,R=  
Pin/qp&Fa8  
package org.rut.util.algorithm.support; "{ FoA3g|  
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import org.rut.util.algorithm.SortUtil; {*$9,  
i-.c= M  
/** N~| t!G*9  
* @author treeroot Pr/]0<s  
* @since 2006-2-2 'evv,Q{87  
* @version 1.0 ]"h=Qc  
*/ )x[HuIRaa  
public class BubbleSort implements SortUtil.Sort{ -TS? fne)  
nvH|Ngg Q  
/* (non-Javadoc) ) Fx ?%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3e 73l  
*/ uy9!qk  
public void sort(int[] data) { ]Uh 1l.O  
int temp; 11{y}J  
for(int i=0;i for(int j=data.length-1;j>i;j--){ !^L-T?y.2  
if(data[j] SortUtil.swap(data,j,j-1); 8&."uEOOU  
} Dft%ip2  
} M _(2sq  
} o%qkqK1  
} Ia7D F'  
c{4R*|^  
} V.2[ F|P;3  
CL1 ;Inzl  
选择排序: tl^m=(ZQ  
|7c `(.  
package org.rut.util.algorithm.support; @c]Xh:I  
*/_@a?  
import org.rut.util.algorithm.SortUtil; Q7(eq0na  
eM }W6vIn  
/** 8[R1A  
* @author treeroot m8AAp1=  
* @since 2006-2-2 ve-8*Xa  
* @version 1.0 3I*uV!notJ  
*/ h'!V8'}O?  
public class SelectionSort implements SortUtil.Sort { t 7^D-l  
DY.58IHg1  
/* l{Er+)a  
* (non-Javadoc) u E.^w;~2=  
* _Wma\(3$  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +>#e=nH  
*/ k{-`]qiK  
public void sort(int[] data) { $ eX*  
int temp; s5A gsMq  
for (int i = 0; i < data.length; i++) { iC*U$+JG  
int lowIndex = i; O^NP0E  
for (int j = data.length - 1; j > i; j--) { WK4@:k m6)  
if (data[j] < data[lowIndex]) { \O? u*  
lowIndex = j; >UWStzH<  
} ]/44Ygz/  
} iRs V#s  
SortUtil.swap(data,i,lowIndex); Bc[6*Y,%T  
} M2p<u-6 "  
} Rcf=J){D6  
nq@5j0fK  
} 5#!ogKQ(i  
[%~^kq=|  
Shell排序: [gZDQcU  
k%Eh{dA  
package org.rut.util.algorithm.support; i| 4_ m  
xYwkFB$$*  
import org.rut.util.algorithm.SortUtil; `xIh\q  
OZT^\Ky_l  
/** S&01SX6  
* @author treeroot `Cg^in\  
* @since 2006-2-2 !tBeuemN%  
* @version 1.0 r<|nwFJ  
*/ NjP ]My  
public class ShellSort implements SortUtil.Sort{ :o$@F-$k  
t'aSF{%  
/* (non-Javadoc) "kr,x3 =  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vgo{]:Aj{  
*/ Mz\yPT;Y  
public void sort(int[] data) { )!a$#"'  
for(int i=data.length/2;i>2;i/=2){ ^aptLJF  
for(int j=0;j insertSort(data,j,i); D'n7&Y  
} WW6yFriuW  
} ~S;!T  
insertSort(data,0,1); Lzz) n%y5  
} V{GXc:=  
rhoeZ  
/** x.\XUJ4x  
* @param data 4#h ?Wga  
* @param j +5-fk>o  
* @param i ZpWu,1  
*/ i@6wO?Tv  
private void insertSort(int[] data, int start, int inc) { $3 vhddO  
int temp; >%h7dC3h  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); R,b59,&3/  
} ymkR!  
} o8tS  
} 0[9I0YBJ  
qguVaV4Y  
} -#%X3F7/w  
PGY9*0n  
快速排序: }$:#+ (17  
u<kD}  
package org.rut.util.algorithm.support; 9v$qrM`8  
>2Ca5C  
import org.rut.util.algorithm.SortUtil; s|gp  
gIBpOPr^d  
/** A6i et~h[  
* @author treeroot [Auc*@  
* @since 2006-2-2 m>YWxa   
* @version 1.0 <`+zvUx^?  
*/ f?0D%pxc}&  
public class QuickSort implements SortUtil.Sort{ 1 7i$8  
y;:]F|%<  
/* (non-Javadoc) ((cb4IX  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6Hn)pD#U  
*/ m#MlH=-  
public void sort(int[] data) { agW9Go_F[  
quickSort(data,0,data.length-1); B52H(sm  
} >HIt}Zh  
private void quickSort(int[] data,int i,int j){ r`[B@  
int pivotIndex=(i+j)/2; 0\wiam-  
file://swap L;Vq j]_  
SortUtil.swap(data,pivotIndex,j); L~ 2q1  
ngLJ@TP-  
int k=partition(data,i-1,j,data[j]); M8zE3;5  
SortUtil.swap(data,k,j); gD1+]am  
if((k-i)>1) quickSort(data,i,k-1); cUsL 6y  
if((j-k)>1) quickSort(data,k+1,j); 8T7f[?  
G h=<0WaF=  
} ?} X}#  
/** JT#7yetk'  
* @param data B0"0_n7-  
* @param i HT&p{7kFm  
* @param j $l#{_~ "m7  
* @return h"8QeX:((  
*/ VWD.J  
private int partition(int[] data, int l, int r,int pivot) { CrO`=\  
do{ ]hKgA~;  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ]4GZ'&m}  
SortUtil.swap(data,l,r); C d|W#.6  
} %wtXo BJ  
while(l SortUtil.swap(data,l,r); zHqhl}  
return l; rg*^w!   
} m r2S!  
/W0E(8:C)  
} /yp/9r@T0  
qg)qjBQwA  
改进后的快速排序: K9*IA@xL  
itHM7d  
package org.rut.util.algorithm.support; Ph Ttx(!  
6J"(xT  
import org.rut.util.algorithm.SortUtil; qPUA!-'  
IhwN],-V  
/** 2!idy]vy_  
* @author treeroot Mlwdha0  
* @since 2006-2-2 !3 ?yG  
* @version 1.0 +0dT^Jkqg  
*/ q- H&5K  
public class ImprovedQuickSort implements SortUtil.Sort { Y-= /,   
X?R |x[  
private static int MAX_STACK_SIZE=4096; :t%)5:@A  
private static int THRESHOLD=10; . v\PilF  
/* (non-Javadoc) S?2YJ l8B  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H@4/#V|Uy  
*/ [n!x&f8Xh  
public void sort(int[] data) { m\?\6W k  
int[] stack=new int[MAX_STACK_SIZE]; =R2l3-HA=  
DU`v J2  
int top=-1; !h*B (,  
int pivot; *73AAA5LKa  
int pivotIndex,l,r; BtID;^D z  
0:#7M}U  
stack[++top]=0; ZHcONYAr  
stack[++top]=data.length-1; `yx56  
{?y<%@  
while(top>0){ ~ttKI4  
int j=stack[top--]; DUhT>,~]  
int i=stack[top--]; &\c5!xQ9*  
 Zsgi{  
pivotIndex=(i+j)/2; 3AvcJ1  
pivot=data[pivotIndex]; fRFYJFc n  
"5h_8k~sQ  
SortUtil.swap(data,pivotIndex,j); @ce3%`c_  
CZ2iJy  
file://partition 2n(ItA  
l=i-1; H<XlUCr_~+  
r=j; E)Srj~$d  
do{ :cb[M5c  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); -aT=f9u  
SortUtil.swap(data,l,r); 3r`<(%\  
} {>A 8g({i  
while(l SortUtil.swap(data,l,r); k5C>_( A  
SortUtil.swap(data,l,j); TGtyJ3x\   
^7<[}u;qF  
if((l-i)>THRESHOLD){ Q8 4t9b  
stack[++top]=i; ;!:F#gahv  
stack[++top]=l-1; rX:1_q`xA  
} x~nQm]@`h  
if((j-l)>THRESHOLD){ n{3| E3  
stack[++top]=l+1; L*v93;|s  
stack[++top]=j; 9[Y*k^.!  
} C-&#r."L  
K]9tc)  
} tbY  SK  
file://new InsertSort().sort(data); =:;YTie  
insertSort(data); xp(mB7;:  
} HI z9s4Y_  
/** ZRUh/<\[  
* @param data [C2kK *JZ  
*/ }pt-q[s>  
private void insertSort(int[] data) { AsD1-$  
int temp; $=lJG(2%  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); "`[$&:~  
} +*<K"H|,  
} 1aVgwAI  
} 0T=jR{j!o  
uV!MW=)  
} C_C$5[~-:  
FGDw;lEa9[  
归并排序: ')rD?Z9 ^  
b6]e4DL:R  
package org.rut.util.algorithm.support; )S#j.8P'B  
{;\%!I  
import org.rut.util.algorithm.SortUtil; (5>{?dR)|  
3JTU^-S<  
/** 9W$m D w6f  
* @author treeroot V!\n3i?i  
* @since 2006-2-2 w9'H.L q  
* @version 1.0 {Qm6?H  
*/ ^fG`DjA)  
public class MergeSort implements SortUtil.Sort{ vrQFx~ZztH  
[l`^fnKt  
/* (non-Javadoc) q;IhLBl'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])  5=*@l  
*/ B{^`8Htrn  
public void sort(int[] data) { F>TYVxQ  
int[] temp=new int[data.length]; py}.00it  
mergeSort(data,temp,0,data.length-1); 0@:Y>qVa  
} O~nBz):2  
38<~R  
private void mergeSort(int[] data,int[] temp,int l,int r){ t]gq+ c Lo  
int mid=(l+r)/2; G[y&`Qc)G  
if(l==r) return ; tnA_!$Y a  
mergeSort(data,temp,l,mid); S[ws0Y60  
mergeSort(data,temp,mid+1,r); *1R##9\jU7  
for(int i=l;i<=r;i++){ </8be=e7p  
temp=data; {V{0^T-  
}  xh=FkY&d  
int i1=l; gD,A9a(3  
int i2=mid+1;  \\y}DNh  
for(int cur=l;cur<=r;cur++){ 3KDu!w@  
if(i1==mid+1) >t2]Ssi(  
data[cur]=temp[i2++]; M^Q&A R'F  
else if(i2>r) ,HQ1C8  
data[cur]=temp[i1++]; ^u=PdBY  
else if(temp[i1] data[cur]=temp[i1++]; Z#srQD3].(  
else ^ yY{o/6  
data[cur]=temp[i2++]; S83]O!w0  
} 8+=p8e~An  
} yY-FL`-  
AECxd[k$9  
} XB6N[E  
Ym3 "  
改进后的归并排序: Z3LQl(  
c1gz #,  
package org.rut.util.algorithm.support; YK(XS"Kl  
F+lm[4n  
import org.rut.util.algorithm.SortUtil; ViCg|1c  
{yGZc3e1j  
/** Kc%tnVyGh:  
* @author treeroot Z $ p^v*y  
* @since 2006-2-2 )6PJ*;p-  
* @version 1.0 ,?P8m"  
*/  `;zu1o  
public class ImprovedMergeSort implements SortUtil.Sort { eTLI/?|+N  
50}.Xm@,BO  
private static final int THRESHOLD = 10; bjU 2UcI"<  
!&1}w86  
/* eA3`]XP.`b  
* (non-Javadoc) 5d)'`hACe  
* ;5,`Jpca  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <K|3Q'(S  
*/ ex0 kb  
public void sort(int[] data) { PR48~K,?  
int[] temp=new int[data.length]; CnM+HN30o  
mergeSort(data,temp,0,data.length-1); n0Qh9*h  
} :u[ oc.  
:Vu7,o  
private void mergeSort(int[] data, int[] temp, int l, int r) { Dx p>  
int i, j, k; }rFsU\]:q  
int mid = (l + r) / 2; w0q?\qEX  
if (l == r) KZ367&>b7  
return; I{i:B  
if ((mid - l) >= THRESHOLD) D5o+ 0R  
mergeSort(data, temp, l, mid); 9q@ z[+X  
else 6Cop#kW#  
insertSort(data, l, mid - l + 1); n"K {uj))  
if ((r - mid) > THRESHOLD) ; 'b!7sMO~  
mergeSort(data, temp, mid + 1, r); ==PQ-Ia  
else V{ 4i$'  
insertSort(data, mid + 1, r - mid); 9Bbm7Gd  
+MOe{:/6  
for (i = l; i <= mid; i++) { E.5*Jr=J  
temp = data; 4\ uZKv@,  
} 4OqE.LFu  
for (j = 1; j <= r - mid; j++) { aPcGI  
temp[r - j + 1] = data[j + mid]; {9m!UlTtw  
} ~@)- qV^~  
int a = temp[l]; Vz=j )[  
int b = temp[r]; n $D}0wSM/  
for (i = l, j = r, k = l; k <= r; k++) { XL"v21X  
if (a < b) { es*_Oo1  
data[k] = temp[i++]; s>9z+;~!  
a = temp; Wo1V$[`Dy  
} else { P?W T)C2)u  
data[k] = temp[j--]; $=@9 D,R  
b = temp[j]; 7(nz<z p  
} <:kTTye|  
} ]$XBd{\D{  
} '6d D^0dZ  
?,+C!R?  
/** (e bBH  
* @param data 9;xL!cy  
* @param l .:|#9%5  
* @param i 0NuL9  
*/ ~L4*b *W  
private void insertSort(int[] data, int start, int len) { Wq[=}qh~  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 47(1V/r  
} e&FX7dsyy  
} a|] %/[G@  
} mZ& \3m=  
} @wAr[.lZ  
/ut~jf`  
堆排序: UG^?a  
*x# &[>  
package org.rut.util.algorithm.support; /pSUn"3  
/v|68x6  
import org.rut.util.algorithm.SortUtil; ba:mO$  
H( DVVHx  
/** hK9t}NE.O  
* @author treeroot F] dd>#  
* @since 2006-2-2 ?Uy*6YS  
* @version 1.0 YWn6wzu%Vc  
*/ !X v2PdP  
public class HeapSort implements SortUtil.Sort{ 99+/W*C  
R; Gl{  
/* (non-Javadoc) 6S+K*/w  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oE|u;o  
*/ X{9JSq  
public void sort(int[] data) { J*6n6  
MaxHeap h=new MaxHeap(); 2gC&R1 H  
h.init(data); 0x9F*i_  
for(int i=0;i h.remove(); B1i!te}*  
System.arraycopy(h.queue,1,data,0,data.length); ^S;RX*  
} J}Z_.:JO(w  
DbNi;m  
private static class MaxHeap{ J*q=C%}.  
nV,{w4t+  
void init(int[] data){ R1b )  
this.queue=new int[data.length+1]; 1X!f!0=g+  
for(int i=0;i queue[++size]=data; y uK5r  
fixUp(size); !Z0rTC3d  
} r{6B+3J  
} 9'/|?I  
l]58P  
private int size=0; Z+h7 0,|  
~jRk10T(B  
private int[] queue; UV *tO15i  
xjn8)C  
public int get() { PE6u8ZAb"  
return queue[1]; a*n%SUP  
} :x*|lz[  
]rX?n  
public void remove() { }9+1<mT9a/  
SortUtil.swap(queue,1,size--); dnWt\>6& 2  
fixDown(1); 3{#pd6e5  
} g$^qQs)^N  
file://fixdown $X<<JnsK  
private void fixDown(int k) { uB#B\i  
int j; J^+$L"K  
while ((j = k << 1) <= size) { T~ q'y~9o  
if (j < size %26amp;%26amp; queue[j] j++; >-@{vyoOy  
if (queue[k]>queue[j]) file://不用交换 % OfDTs  
break; -z~ V   
SortUtil.swap(queue,j,k); 3PR7g  
k = j; tx&U"]  
} >"$-VY6i  
} c:,{ O 0 #  
private void fixUp(int k) { PuoJw~^h  
while (k > 1) { .T$9Q Ar5  
int j = k >> 1; '14l )1g.  
if (queue[j]>queue[k]) Gp3t?7S{T  
break; %_J/&{6G  
SortUtil.swap(queue,j,k); YT%SCaU  
k = j; \$\(9!=  
} l<MCmKuYp  
} hb8@br  
K&P{2Hndr  
} *~oDP@[S  
-Fw4;&>  
} O@(.ei*HJ!  
}${ZI  
SortUtil: ALt";8Oa  
~\s &]L  
package org.rut.util.algorithm; .2SIU4[P  
XJ1nhE  
import org.rut.util.algorithm.support.BubbleSort; [j+0EVwB  
import org.rut.util.algorithm.support.HeapSort; aFc'_FrQ  
import org.rut.util.algorithm.support.ImprovedMergeSort; Y(!)G!CMc  
import org.rut.util.algorithm.support.ImprovedQuickSort; YU\t+/b  
import org.rut.util.algorithm.support.InsertSort; +7vh__  
import org.rut.util.algorithm.support.MergeSort; zB7dCw  
import org.rut.util.algorithm.support.QuickSort; ={D B  
import org.rut.util.algorithm.support.SelectionSort; Ko1?jPE  
import org.rut.util.algorithm.support.ShellSort; T+{'W  
#?d>S;)+  
/** Ywb)h^{!  
* @author treeroot {ZYCnS&?CL  
* @since 2006-2-2 Ex&RR< 5  
* @version 1.0 (i~%4w=  
*/ D '_#?%3^  
public class SortUtil { Yiw^@T\H`  
public final static int INSERT = 1; 7X3l&J2C4l  
public final static int BUBBLE = 2; 7a.#F]`  
public final static int SELECTION = 3; owVUL~  
public final static int SHELL = 4; ] j?Fk$C  
public final static int QUICK = 5; V@xnz)^t  
public final static int IMPROVED_QUICK = 6; OZ]3OL,  
public final static int MERGE = 7; F^v{Jqc  
public final static int IMPROVED_MERGE = 8; >v4~:n2D  
public final static int HEAP = 9; W)P_t"'@L  
#7:9XID /  
public static void sort(int[] data) {  D)eKq!_  
sort(data, IMPROVED_QUICK); o;-! ?uJ  
} 2{tJ'3  
private static String[] name={ ~#x!N=q  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (C[S?@S  
}; ,&l*AB!  
lVBy&f  
private static Sort[] impl=new Sort[]{ r ($t.iS  
new InsertSort(), ',ybHW%D%i  
new BubbleSort(), <6@NgSFz'  
new SelectionSort(), Oua/NF)  
new ShellSort(), jM@I"JZ b  
new QuickSort(), 2"K~:Tm#w  
new ImprovedQuickSort(), !g:G{b  
new MergeSort(), ?\$/#zak  
new ImprovedMergeSort(), (c7{dYV  
new HeapSort() VrL>0d&d  
}; g/Nj|:3  
p2?+[d  
public static String toString(int algorithm){ /r{5Lyk*  
return name[algorithm-1]; U"G+su->e  
} 83(P_Y:  
t`3T_t Y  
public static void sort(int[] data, int algorithm) { qO'5*d;!d  
impl[algorithm-1].sort(data); O g~"+IGp  
} {8Nd-WJ{  
XD>@EYN<X  
public static interface Sort { 1pr_d"#4  
public void sort(int[] data); KT?s\w  
} qq{N; C  
qk"=nAJX  
public static void swap(int[] data, int i, int j) { jJnBwHp  
int temp = data; bL[W.O0  
data = data[j]; W8rn8Rh  
data[j] = temp; *==nOO9G  
} 'V{k$}P2  
} 9r*T3=u.S  
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