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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。 I#&r5Q  
插入排序: s2#Ia>5!  
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package org.rut.util.algorithm.support; D:;idUO  
LP=j/qf|  
import org.rut.util.algorithm.SortUtil; Ps74SoD-  
/** ](A2,F 9(U  
* @author treeroot Y}1c>5{bE  
* @since 2006-2-2 >WIc"y.  
* @version 1.0 xbm%+  
*/ G[A3H> >  
public class InsertSort implements SortUtil.Sort{ o87kF!x  
%VH,(}i  
/* (non-Javadoc) XTo7fbW*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])  }:Gs ,  
*/ -cM1]soT  
public void sort(int[] data) { ^J5{quV  
int temp; IQRuqp KL  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Fq@o_bI  
} B*,)@h  
} Y.\x.Hg  
} $[A\i<#  
pYx,*kG:HW  
} D]]wJQU2  
viG,z4Zf  
冒泡排序: )63 $,y-;$  
dPwyiV0  
package org.rut.util.algorithm.support; L%T(H<G  
.VCY|KZ  
import org.rut.util.algorithm.SortUtil; pA6KiY&  
!g9k9 l  
/** V}Y*Yv  
* @author treeroot M'PZ{6;  
* @since 2006-2-2 njF$1? )sq  
* @version 1.0 WJ25fTsG  
*/ 0RT8N=B83  
public class BubbleSort implements SortUtil.Sort{ yGdX>h  
 Zgo~"G  
/* (non-Javadoc) =FrB{Eu  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Gv_~@MN  
*/ s*ZE`/SM3  
public void sort(int[] data) { } #rTUX  
int temp; t$18h2yOL  
for(int i=0;i for(int j=data.length-1;j>i;j--){ P[ 2!D)A  
if(data[j] SortUtil.swap(data,j,j-1); -GA F>  
} c]PTU2BB8  
} @kWL "yy,  
} +e-F`k  
} x#J9GP.  
gSz<K.CT  
} x9"Cm;H%  
H OR8Jwf:  
选择排序: 9{*{Ba  
P.'.KZJ:WD  
package org.rut.util.algorithm.support; STp9Gh-  
L~Gr,i  
import org.rut.util.algorithm.SortUtil; #h5lz%2g  
`RL Wr,h  
/** zj1~[$  (  
* @author treeroot mGjB{Q+  
* @since 2006-2-2 tWIs |n  
* @version 1.0 9 {&g.+  
*/ JWix Y/  
public class SelectionSort implements SortUtil.Sort { ^#Ha H  
#ES[),+|mB  
/* H<(F$7Q!\  
* (non-Javadoc) p~ b4TRvA6  
* j uA@"SG  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \c< oVF'  
*/ c ZYy+  
public void sort(int[] data) {  zm"  
int temp; n#lbfN 4  
for (int i = 0; i < data.length; i++) { {p +&Q|  
int lowIndex = i; )G/bP!^+(  
for (int j = data.length - 1; j > i; j--) { xB *b7-a  
if (data[j] < data[lowIndex]) { `tkoS  
lowIndex = j; fp)SZu_*  
}  g2vm]j  
} 2n:<F9^"  
SortUtil.swap(data,i,lowIndex); x]{P.7IO'  
} =AIFu\9#a`  
} Q K]P=pE'C  
i]v3CY|3AI  
} ye^x>a['  
YThVG0I =  
Shell排序: W,xdj!^t  
,/\`Rc^n  
package org.rut.util.algorithm.support; oY)eN?c  
h>/teHy /  
import org.rut.util.algorithm.SortUtil; ?zW'Hi  
A2|Bbqd  
/** KD kGQh#9  
* @author treeroot V<QpC5  
* @since 2006-2-2 b^/u9  
* @version 1.0 )|~&(+Q?]  
*/ qyz%9 9  
public class ShellSort implements SortUtil.Sort{ B\J[O5},  
j&8YE7  
/* (non-Javadoc) 6}^x#9\  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y2A\7&7  
*/ @t%da^-HS"  
public void sort(int[] data) { .U!EA0B  
for(int i=data.length/2;i>2;i/=2){ uY]';Ot G  
for(int j=0;j insertSort(data,j,i); 7=P)`@  
} 4uXGp sL  
} K4Q{U@ZJ  
insertSort(data,0,1); OrkcY39"~a  
} &FXf]9 _X  
gP% <<yl  
/** 3:,%># "  
* @param data !>sA.L&=  
* @param j ~7: q+\  
* @param i `<YMkp[  
*/ QVT0.GzR  
private void insertSort(int[] data, int start, int inc) { |! 9~  
int temp; w <r*&  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ef)RlzL Oq  
} xV> .]  
} Wg|6{'a  
} REh"/d  
;jzJ6~<  
} K *@?BE  
Q9bnOvKe|  
快速排序: xA3_W  
8{>|%M  
package org.rut.util.algorithm.support; T9yI%;D  
)G2Bx+Z;L  
import org.rut.util.algorithm.SortUtil; Ne u$SP  
T"g_a|7Tj  
/** [<@L`ki  
* @author treeroot dn h qg3Y  
* @since 2006-2-2 .\b.l@O<Z  
* @version 1.0 b `P6Ox3  
*/ 7!M; ?Y  
public class QuickSort implements SortUtil.Sort{ RuHDAJ"&a  
zA#pgX[#  
/* (non-Javadoc) D <iG*I  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (%^C}`|EA  
*/ nAP*w6m0j  
public void sort(int[] data) { K_M Ed1l  
quickSort(data,0,data.length-1); g2f"tu_/%  
} (Yy#:r;U  
private void quickSort(int[] data,int i,int j){ qsj$u-xhX  
int pivotIndex=(i+j)/2;  L` [iI  
file://swap z>!./z]p  
SortUtil.swap(data,pivotIndex,j); Y1 Ql_  
{MtJP:8Jp  
int k=partition(data,i-1,j,data[j]); RPX.?;":  
SortUtil.swap(data,k,j); \#[DZOI~  
if((k-i)>1) quickSort(data,i,k-1); [vr"FLM|9  
if((j-k)>1) quickSort(data,k+1,j);  ]! ZZRe  
! Vl)aL  
}  l7t  
/** (6fD5XtS  
* @param data 1feVFRx'  
* @param i Sstz_t  
* @param j BsA4/Bf  
* @return Bl>m`/\1i  
*/ ;1~n|IY  
private int partition(int[] data, int l, int r,int pivot) { nKE^km  
do{ "/R?XCBZsb  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); %qV:h#  
SortUtil.swap(data,l,r); Ea4zC|;  
} `C4(C4u  
while(l SortUtil.swap(data,l,r); >:.c?{%g*  
return l; ^2 dQVV.  
} x}ZXeqt{ {  
zW`Hqt;  
} /R|?v{S1  
Da<`| l  
改进后的快速排序: OsOfo({I_  
+wj}x?ZeV  
package org.rut.util.algorithm.support; fhg'4FO  
H0b{`!'Fs:  
import org.rut.util.algorithm.SortUtil; D{t_65c-  
;-JF1p7;  
/** b0 }dy\dnQ  
* @author treeroot m2m ;|rr  
* @since 2006-2-2 ,tXI*R  
* @version 1.0 j~b NH~3  
*/ ` { Ox=+]M  
public class ImprovedQuickSort implements SortUtil.Sort { rX^uHq8  
N(i.E5&9  
private static int MAX_STACK_SIZE=4096; W /v &V#  
private static int THRESHOLD=10; 0<V/[$}\D  
/* (non-Javadoc) odL* _<Z  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E|-oUz t  
*/ 1#L%Q(G  
public void sort(int[] data) { P:Q&lnC  
int[] stack=new int[MAX_STACK_SIZE]; )W_akUL  
;QVTb3Th  
int top=-1; |QZ E  
int pivot; -I4@6v E,  
int pivotIndex,l,r; ,]t_9B QK  
A#`$#CO  
stack[++top]=0; Lt~&K$t7~  
stack[++top]=data.length-1; Eg&5tAyM  
E\}A<r  
while(top>0){ _*z ^PkH  
int j=stack[top--]; +L=Xc^  
int i=stack[top--]; E 6#/@C,  
\hBzQ%0  
pivotIndex=(i+j)/2; y.( <  
pivot=data[pivotIndex]; gDJ} <^  
me@`;Q3  
SortUtil.swap(data,pivotIndex,j); SP<(24zdd  
mY=sh{ir  
file://partition ; P<h 9(  
l=i-1; UOj*Gt&  
r=j; sMLXn]m  
do{ jc3Q3Th/zn  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); S5gBVGh  
SortUtil.swap(data,l,r); h143HXBi1+  
} 7`7M4  
while(l SortUtil.swap(data,l,r);  rPr]f;  
SortUtil.swap(data,l,j); ,dd1/zm  
3;jx Io$,  
if((l-i)>THRESHOLD){ 83]m/Iz  
stack[++top]=i; ]D~Ibv{Y  
stack[++top]=l-1; K/(QR_@?  
} -~RGjx  
if((j-l)>THRESHOLD){ e2fv%  
stack[++top]=l+1; X!{K`~DRX  
stack[++top]=j; nWc@ufY  
} e KuF7Oo  
.(8 V  
} tYgHJ~1L*  
file://new InsertSort().sort(data); DBGU:V,85  
insertSort(data); K8&) kfyI  
} !ni 1 qM  
/** 'cu14m_  
* @param data oP T)vN?  
*/ ?x 0gI   
private void insertSort(int[] data) { : &nF>  
int temp; 48S NI  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); +2tFX  
} # bjK]+  
} l['p^-I  
} FzSL[S4i  
Oc,HnyV+  
} BK)<~I  
*Ej;}KSv  
归并排序: p,f$9t4  
}%c>Hh  
package org.rut.util.algorithm.support; d"E3ypPK  
_B^X3EOc  
import org.rut.util.algorithm.SortUtil; -awG1 4%  
pyX:$j2R+%  
/** X. Ur`X  
* @author treeroot LN.*gG l  
* @since 2006-2-2 EUh_`R  
* @version 1.0 x|AND]^Q  
*/ <_k A+&T  
public class MergeSort implements SortUtil.Sort{ MSBrI3MqQ  
Y^DGnx("m  
/* (non-Javadoc) 3.P7GbN  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b LGC  
*/ 1he5Zevm}  
public void sort(int[] data) { $!$If( 7  
int[] temp=new int[data.length]; o7Z 8O,;  
mergeSort(data,temp,0,data.length-1); SmvMjZ+7Y  
} \1#]qs -  
h 2JmRO  
private void mergeSort(int[] data,int[] temp,int l,int r){ xCWS  
int mid=(l+r)/2; t_16icF9U  
if(l==r) return ; PJ&L7   
mergeSort(data,temp,l,mid); )FG/   
mergeSort(data,temp,mid+1,r); b>i5r$S8G  
for(int i=l;i<=r;i++){ *ZLisq-f  
temp=data; T*8 S7l  
} T~L V\}h  
int i1=l; gMZ+kP`  
int i2=mid+1; _NwHT`O[  
for(int cur=l;cur<=r;cur++){ LXJ;8uW2y  
if(i1==mid+1) 9@IL547V  
data[cur]=temp[i2++]; qQ3pe:n?  
else if(i2>r) 2"shB(:z>  
data[cur]=temp[i1++]; QBi]gT@&g  
else if(temp[i1] data[cur]=temp[i1++]; }CZw'fhVWO  
else JC9$"0d7  
data[cur]=temp[i2++]; g]N'6La  
} }kItVx  
} n'q:L(`M  
K0B<9Wi |  
} Fv)E:PnKC  
g)ZMU^1  
改进后的归并排序: O^6anUV0  
D@.qdRc3  
package org.rut.util.algorithm.support; .#iot(g  
 /d!  
import org.rut.util.algorithm.SortUtil; Og@{6>  
$`%Om WW{  
/** JKrS;J^97v  
* @author treeroot ~b X~_\  
* @since 2006-2-2 &%@O V:C  
* @version 1.0 G3]#Du  
*/ 7TI6EKr  
public class ImprovedMergeSort implements SortUtil.Sort { Z1v~tqx  
b$Dh|-8  
private static final int THRESHOLD = 10; QY<5o;m`  
'+vmC*-I(  
/* Rrl  
* (non-Javadoc) ZQ*Us*9I  
* D*PEIsV  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m__pQu:  
*/ l1O"hd'~s  
public void sort(int[] data) { o[WDPIG  
int[] temp=new int[data.length]; Z zp"CK 5  
mergeSort(data,temp,0,data.length-1); <-N2<s l  
} uifVSf*  
L@zhbWY  
private void mergeSort(int[] data, int[] temp, int l, int r) { h7T),UL  
int i, j, k; -/Wf iE  
int mid = (l + r) / 2; &dK !+  
if (l == r) "dDrw ]P;  
return; W\w#}kY  
if ((mid - l) >= THRESHOLD) FY^Nn  
mergeSort(data, temp, l, mid); |S |'o*u  
else [Y@>,B!V  
insertSort(data, l, mid - l + 1); ;y1/b(t  
if ((r - mid) > THRESHOLD) yf8kBT:&S  
mergeSort(data, temp, mid + 1, r); "8cI]~ V  
else &|RTLGwX  
insertSort(data, mid + 1, r - mid); vlEW{B;)Z  
t#t[cgI  
for (i = l; i <= mid; i++) { gJrWewEe  
temp = data; hLk6Hqr7  
} %OO}0OW  
for (j = 1; j <= r - mid; j++) { mb1c9  
temp[r - j + 1] = data[j + mid]; *W^ZXhrZ  
} r;[=y<Yf  
int a = temp[l]; +DR$>a  
int b = temp[r]; =Tl_~OR  
for (i = l, j = r, k = l; k <= r; k++) { T{f$S  
if (a < b) { Qe ip h  
data[k] = temp[i++]; J,u-)9yBA<  
a = temp; fG$LqzyqlK  
} else { #qDm)zCM  
data[k] = temp[j--]; !d!u{1Y&  
b = temp[j]; pPo xx"y  
} cgQ6b.  
} Myiv#rQ)  
} 4G&dBH  
iT,7jd?6#  
/** 2E!~RjxSY  
* @param data w( XZSE  
* @param l SUUN_w~  
* @param i 3z2 OW@zL$  
*/ 6(4d3}F  
private void insertSort(int[] data, int start, int len) { 6X m'^T  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :N$-SV  
} r-.@MbBm  
} j4!O,.!T  
} {)!>e  
} +FqE fY4j  
5Lej_uqF   
堆排序: 51#OlvD  
 +)e|>  
package org.rut.util.algorithm.support; y;8&J{dd  
N 1Ag .  
import org.rut.util.algorithm.SortUtil; (?zD!% k  
<"P-7/j3j  
/** hdrsa}{g  
* @author treeroot \y=oZk4  
* @since 2006-2-2 q^EY?;Y  
* @version 1.0 X<[ qX*  
*/ |3@DCb T  
public class HeapSort implements SortUtil.Sort{ 9_O4 yTL  
23>[-XZb[O  
/* (non-Javadoc) a6e{bAuq  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xw!\,"{s  
*/ %%uE^nX>  
public void sort(int[] data) { 1d]F$ >  
MaxHeap h=new MaxHeap(); u YT$$'S  
h.init(data);  G7a l@  
for(int i=0;i h.remove(); JDE_*xaUV  
System.arraycopy(h.queue,1,data,0,data.length); VLkAsM5}%  
} LjG^c>[:m  
eJHh}  
private static class MaxHeap{ g]2L[4  
l$/lbwi%  
void init(int[] data){ Q^rR}Ws  
this.queue=new int[data.length+1]; :\His{%  
for(int i=0;i queue[++size]=data; %'HDP3  
fixUp(size); I_u/  
} 8iJB'#''*  
} RK|*yt"f"  
lYQ|NL():  
private int size=0; qclc--fsE  
}>0>OqvF  
private int[] queue; yivu|q  
&.*UVc2+Y  
public int get() { 4.jRTL5-oj  
return queue[1]; Ls9NQy  
} cpltTJFg  
@q/g%-WNz  
public void remove() { NEri{qxm  
SortUtil.swap(queue,1,size--); gaY&2  
fixDown(1); >dt*^}*  
} ~,HFd`  
file://fixdown qEST[S V  
private void fixDown(int k) { J}X{8Ds9  
int j; FHSoj=  
while ((j = k << 1) <= size) { :Tg+)cZ  
if (j < size %26amp;%26amp; queue[j] j++; 67& hXIp  
if (queue[k]>queue[j]) file://不用交换 &S*~EM.l8  
break; ,=m.WmXE  
SortUtil.swap(queue,j,k); Jd>~gA}l  
k = j; s51$x M  
} J @"#  
} 5h#h>0F  
private void fixUp(int k) { .w.:o2L  
while (k > 1) { LJ(WU)CPc  
int j = k >> 1; = (F   
if (queue[j]>queue[k]) "lL+Heq>V  
break; -y+>^45  
SortUtil.swap(queue,j,k); :OY~Q3 @  
k = j; 'cXdc  
} +&`W\?.~  
} != ,4tg`  
"S%t\  
} `NsjtT'_  
sV  
} .9qK88fUR  
tUJRNEg  
SortUtil: uPA ( 1  
7mi!yTr}  
package org.rut.util.algorithm; F`nQS&y  
Z nc(Q  
import org.rut.util.algorithm.support.BubbleSort; eyJ07  
import org.rut.util.algorithm.support.HeapSort; GlAI~\A  
import org.rut.util.algorithm.support.ImprovedMergeSort; p?:5 U[KM  
import org.rut.util.algorithm.support.ImprovedQuickSort; 5:h[%3'bB  
import org.rut.util.algorithm.support.InsertSort; Nujnm$!,Q  
import org.rut.util.algorithm.support.MergeSort; =#b@7Yw:  
import org.rut.util.algorithm.support.QuickSort; -Ks>s  
import org.rut.util.algorithm.support.SelectionSort; w6% Q"%rp  
import org.rut.util.algorithm.support.ShellSort; m.e]tTe  
f V. c6  
/** !.] JiT'o  
* @author treeroot 7z{wYCw  
* @since 2006-2-2 -1g :3'% P  
* @version 1.0 %SM;B-/zHt  
*/ +J X;T(T  
public class SortUtil { g\JJkXjD#  
public final static int INSERT = 1; @LKQ-<dZG  
public final static int BUBBLE = 2; yLX $SR  
public final static int SELECTION = 3; ATNOb  
public final static int SHELL = 4; 1PkCWRpR  
public final static int QUICK = 5; @^W`Yg)C  
public final static int IMPROVED_QUICK = 6; 18>cfDh;N  
public final static int MERGE = 7; %t9C  
public final static int IMPROVED_MERGE = 8; DmiBM6t3N  
public final static int HEAP = 9; N6U d(8*  
W_\zx<m  
public static void sort(int[] data) { %fqR  
sort(data, IMPROVED_QUICK); wSTul o:9  
} hArY$T&MB  
private static String[] name={ TC\+>LXiZ  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9t"Rw ns  
}; ?['!0PF  
 }vd*eexA  
private static Sort[] impl=new Sort[]{ SiratkP9n7  
new InsertSort(), SA x9cjj+  
new BubbleSort(), a:h<M^n049  
new SelectionSort(), {m.$EoS  
new ShellSort(), G'ykcB._  
new QuickSort(), :gh[BeqQ)  
new ImprovedQuickSort(), ?{{w[U6NE  
new MergeSort(), |cPHl+$nh.  
new ImprovedMergeSort(), o\IMYT  
new HeapSort() u epyH  
}; qLN^9PdEE  
c3A\~tHW  
public static String toString(int algorithm){ }htjT/Nm  
return name[algorithm-1]; dj0; tQ=C  
} tMIYVHGy  
]A#lV$  
public static void sort(int[] data, int algorithm) { ggr  
impl[algorithm-1].sort(data); \hB BG8=&  
} <uH8Fivb  
`FP?9R6Y  
public static interface Sort { WNjwv/  
public void sort(int[] data); kN1MPd4Yh  
} NO"PO @&Wk  
AZtS4]4G)  
public static void swap(int[] data, int i, int j) { E$e7(D  
int temp = data; ~4S$+*'8  
data = data[j]; rz?Cn X.t  
data[j] = temp; C6_(j48&  
} ?Ec9rM\ze  
} RU)35oEV|  
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