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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。 ?ph>:M  
插入排序: ZA\;9M=  
3pe1"maP  
package org.rut.util.algorithm.support; Y(Y#H$w  
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import org.rut.util.algorithm.SortUtil; FzAzAl 5  
/** q7pe\~q  
* @author treeroot M[C)b\  
* @since 2006-2-2 <b?$-Rx  
* @version 1.0 x->+w Jm@s  
*/ T_d)1m fl  
public class InsertSort implements SortUtil.Sort{ }/4),W@<  
d(K}v\3!  
/* (non-Javadoc) x2f=o|]D'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,'n`]@0?\  
*/ >2ha6A[  
public void sort(int[] data) { FQ0PXYh  
int temp; MS]Q\g}U  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 6(>,qt,9S  
} /CUBs!  
} Bh&dV%'  
} a+j"8tHu$  
R7A:K]iJ5  
} 5n[''#D  
Ed+jSO0  
冒泡排序: lx7]rkWo|a  
e|q~t {=9S  
package org.rut.util.algorithm.support; B}J0 d  
V{ fG~19  
import org.rut.util.algorithm.SortUtil; j@{B 8  
I]%Kd('  
/** 0es\ j6c  
* @author treeroot j9X|c7|  
* @since 2006-2-2 _j*a5fsPU  
* @version 1.0 tns4e\  
*/ i0Rj;E=:]  
public class BubbleSort implements SortUtil.Sort{ $&&+2?cx0  
ZSr!L@S  
/* (non-Javadoc) ?g:sAR'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W\<HUd  
*/ cdN=HM~I  
public void sort(int[] data) { -e>Z!0  
int temp; D^}2ilk!  
for(int i=0;i for(int j=data.length-1;j>i;j--){ lq mr`\@)  
if(data[j] SortUtil.swap(data,j,j-1); Ir=G\/A  
} GE? \Vm  
} `lrNH]B  
} vOq N=bp  
} F,V| In  
z6P~HF+&h  
} L#%)@  
q7I!wD9Cff  
选择排序: n(i/jW~0w  
rM? J40&.  
package org.rut.util.algorithm.support; M@Ti$=  
UY .-Qt  
import org.rut.util.algorithm.SortUtil; p=\Q7<Z6d,  
qt6@]Y  
/** 4_# (y^9  
* @author treeroot K & %8w  
* @since 2006-2-2 -!V{wD3,B  
* @version 1.0 57q?:M=^  
*/ 8c>xgFWp9  
public class SelectionSort implements SortUtil.Sort { >s )L(DHa"  
5hh6;)  
/* LnM$@  
* (non-Javadoc) lBa` nG  
* xZY7X&C4  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !,C8  
*/ xdVsbW)L2  
public void sort(int[] data) { [Zzztn+  
int temp; SM1L^M3)  
for (int i = 0; i < data.length; i++) { QKhGEW~G  
int lowIndex = i; /,~g"y.;,  
for (int j = data.length - 1; j > i; j--) { h lSav?V_  
if (data[j] < data[lowIndex]) { Z:^ S-h  
lowIndex = j; 2H`>Kj  
} KT17I&:  
} R}IuMMx  
SortUtil.swap(data,i,lowIndex); Xq<_r^  
} :F9Oj1lM%  
} bkz/V/Y  
bcT'!:  
} X<5&R{oZ  
!R@jbM  
Shell排序: ,9MNB3  
oS}fr?  
package org.rut.util.algorithm.support; x 0K#-  
HKIr?  
import org.rut.util.algorithm.SortUtil; /`0>U  
>UV}^OO  
/** RS#C4NG  
* @author treeroot .*X=[" F  
* @since 2006-2-2 c]i;0j? Dl  
* @version 1.0 z.+%{_pe  
*/ jp1e3 Cg  
public class ShellSort implements SortUtil.Sort{ ,6o tm  
@sW!g;\T  
/* (non-Javadoc) PIdGis5G  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) < +k dL  
*/ ?b"'w  
public void sort(int[] data) { A-J#$B  
for(int i=data.length/2;i>2;i/=2){ OJhMM-  
for(int j=0;j insertSort(data,j,i); awjAv8tPO!  
} }Oqt=Wm  
} kB%.i%9\\  
insertSort(data,0,1); `m #i|8  
} gf>GK/^HH  
]h=5d09z  
/** fJ6Q:7  
* @param data $*LBZcL  
* @param j sZ7~AJ  
* @param i j)#yyK{k2s  
*/ )eqF21\  
private void insertSort(int[] data, int start, int inc) { 6urU[t1  
int temp; 6'.)z ,ts  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ((<\VQ,>(  
} J1Az+m  
} \Lg4Cx  
} rO YD[+  
Pjxj$>&;*j  
} $RunGaX!=N  
KD\sU6  
快速排序: WF_QhKW|k  
IYHNN  
package org.rut.util.algorithm.support; )vpYVr-  
wQ~]VV RN  
import org.rut.util.algorithm.SortUtil; ggm'9|  
/0$405  
/** 8TK*VOf`  
* @author treeroot %NTJih`  
* @since 2006-2-2 /k(wb4Hv  
* @version 1.0 nLC5FA7<  
*/ FvO,* r9  
public class QuickSort implements SortUtil.Sort{ Oi]B%Uxy=  
Jr= fc*f  
/* (non-Javadoc) P,xJVo\  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =BJe}AV  
*/ b TZ.y.sI  
public void sort(int[] data) { =+I-9=  
quickSort(data,0,data.length-1); <M}O&?N 8x  
} g/\cN(X  
private void quickSort(int[] data,int i,int j){ 2@@evQ  
int pivotIndex=(i+j)/2; P2| +7D:  
file://swap &FJr?hY%  
SortUtil.swap(data,pivotIndex,j); k@h0 }%  
P=L@!F+s  
int k=partition(data,i-1,j,data[j]); ]!N=Z }LD  
SortUtil.swap(data,k,j); mdo$d-d&  
if((k-i)>1) quickSort(data,i,k-1); 4sW~7:vU  
if((j-k)>1) quickSort(data,k+1,j); cMoJHC,!  
x9S9%JG :  
} ?;.=o?e9  
/** ;>;it5 l=  
* @param data "Nz@jv?  
* @param i >oaL-01i  
* @param j o^MoU2c  
* @return ZU;jz[}  
*/ zSu,S4m_;  
private int partition(int[] data, int l, int r,int pivot) { wXKt)3dmu  
do{ TJ_6:;4,|_  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Zb|a\z8?  
SortUtil.swap(data,l,r); {E7STLQ_%  
}  qmenj  
while(l SortUtil.swap(data,l,r); ,A)Z .OWOq  
return l; ET 0(/Zz  
} -YmIRocx  
jzZ]+'t  
} 8OO[Le]1  
U0srwt97S  
改进后的快速排序: LafBf6wds  
12_ 7UWZ"  
package org.rut.util.algorithm.support; ll- KK`Ka  
0 0|!g"E>$  
import org.rut.util.algorithm.SortUtil; B7YE+  
.+<Ka0  
/** eH[i<Z  
* @author treeroot x5Fo?E  
* @since 2006-2-2 zA:q/i  
* @version 1.0 <[K)PI  
*/ m|t\w|B2  
public class ImprovedQuickSort implements SortUtil.Sort { N:S2X+}(  
$|T Lt{ K  
private static int MAX_STACK_SIZE=4096; gW9`k,U  
private static int THRESHOLD=10; R,=8)OI2  
/* (non-Javadoc) rKd|s7l  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mZmEE2h  
*/ (/!@ -]1  
public void sort(int[] data) { r4fg!]J ;  
int[] stack=new int[MAX_STACK_SIZE]; Dl AwB1Ak  
KaH e(  
int top=-1; C*B5"s"  
int pivot; *K@O3n   
int pivotIndex,l,r; 1oQbV`P  
{6wXDZxv  
stack[++top]=0; (TO<SY3AB  
stack[++top]=data.length-1; (I'{ pF)  
0>]&9'cn  
while(top>0){ -mmQ]'.0  
int j=stack[top--]; ,8d&uR}x  
int i=stack[top--]; 64`l?F  
C>mFylN  
pivotIndex=(i+j)/2; E AKW^'D  
pivot=data[pivotIndex]; C3~~h|:  
3Co1bY:  
SortUtil.swap(data,pivotIndex,j); Msfxce  
2tCw{Om*  
file://partition VB T 66kV  
l=i-1; W tHJG5  
r=j; 1$6 u  
do{ MpvGF7H  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); o@]n<ZYo  
SortUtil.swap(data,l,r); _x#y   
} bAuiMw7!  
while(l SortUtil.swap(data,l,r); 3>73s}3  
SortUtil.swap(data,l,j); L~by`q N_  
VM\\.L  
if((l-i)>THRESHOLD){ 0Zo><=  
stack[++top]=i; vv<\LN0  
stack[++top]=l-1; Z7[S698  
} J^%E$ s  
if((j-l)>THRESHOLD){ ~ Fl\c-  
stack[++top]=l+1; D/%v/mpj$  
stack[++top]=j; >i.$s  
} }J92TV  
`T ^0&#  
} {4f%UnSz(  
file://new InsertSort().sort(data); Q u7ML]e?z  
insertSort(data); 5 wN)N~JE  
} |TkicgeS  
/** @PhAg  
* @param data -U?%A:,a|  
*/ 8m `Y  
private void insertSort(int[] data) { aG4 ^xOD  
int temp; JP {`^c  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); jUR* |  
} $ndBT+ i  
} ]Y76~!N  
} LTH, a?lD  
2Ur&_c6 P  
} Aw4)=-LKO  
]n<B a7Y  
归并排序: oWi#?'  
WX_g  
package org.rut.util.algorithm.support; HU4h.Lm  
_^zs(  
import org.rut.util.algorithm.SortUtil; \yxGE+~P  
3webAaO  
/** t}pYSSTz  
* @author treeroot Gv }  
* @since 2006-2-2 },Grg~l  
* @version 1.0 PU B0H  
*/ )J+rt^4|  
public class MergeSort implements SortUtil.Sort{ 7Q~W}`Qv'  
T2)CiR-b  
/* (non-Javadoc) Us pv^O9_  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {TMng&  
*/ |E||e10wR  
public void sort(int[] data) { uGW#z_{(n  
int[] temp=new int[data.length]; B> \q!dX3  
mergeSort(data,temp,0,data.length-1); C#1'kQO  
} F{.g05^y  
xXmlHo<D  
private void mergeSort(int[] data,int[] temp,int l,int r){ I69Z'}+qz  
int mid=(l+r)/2; ]gv3|W  
if(l==r) return ; O*,O]Q  
mergeSort(data,temp,l,mid); KZ^>_K&  
mergeSort(data,temp,mid+1,r); wc"~8Ah  
for(int i=l;i<=r;i++){ qf<o"B|_9  
temp=data; \9od*y  
} b'R]DS{8  
int i1=l; .W2w/RayC  
int i2=mid+1; mL'A$BR`  
for(int cur=l;cur<=r;cur++){ QyZ' %T5J  
if(i1==mid+1) XH/!A`ZK  
data[cur]=temp[i2++]; @ptrF pSL  
else if(i2>r) [O!/hppN  
data[cur]=temp[i1++]; ?6x&A t  
else if(temp[i1] data[cur]=temp[i1++]; .RmoO\ ,Gm  
else p<l+js(5|  
data[cur]=temp[i2++]; !,5qAGi0  
} '}(Fj2P79  
} 0R(['s:3`  
s- 0Xt<  
} 9:Bn-3)  
n:s _2h(u  
改进后的归并排序: m c@Z+t'  
1Ak0A6E  
package org.rut.util.algorithm.support; 00y(E @~  
VAyAXN~  
import org.rut.util.algorithm.SortUtil; 5b I4' ;  
4 EA$<n(A-  
/** 7*Zm{r@u  
* @author treeroot `Jj b4]  
* @since 2006-2-2 v{*2F  
* @version 1.0 |Dq?<Ha  
*/ fLSDt(c',  
public class ImprovedMergeSort implements SortUtil.Sort { d& v 7l  
J<Ki;_=I  
private static final int THRESHOLD = 10; Zc&pJP+M'U  
|gINB3L  
/* z\K %  
* (non-Javadoc) P#8lO%;  
* 8+(wAbp  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tgi7RAY  
*/ 78?{;iNv  
public void sort(int[] data) { L6!Hv{ijn  
int[] temp=new int[data.length]; {cdrMP@""  
mergeSort(data,temp,0,data.length-1); K!E\v4  
} p_apVm\t_  
>Apa^Bp  
private void mergeSort(int[] data, int[] temp, int l, int r) { dI=&gz  
int i, j, k; zqI|VH  
int mid = (l + r) / 2; 7/BjWU5*  
if (l == r) iF.f*3-NJB  
return; o4z|XhLr  
if ((mid - l) >= THRESHOLD) T`<Tj?:^&  
mergeSort(data, temp, l, mid); "15frr?  
else 92b}N|u  
insertSort(data, l, mid - l + 1); JV/:QV  
if ((r - mid) > THRESHOLD) ;9J6)zg !n  
mergeSort(data, temp, mid + 1, r); 61HJ%  
else 5,|{|/  
insertSort(data, mid + 1, r - mid); H,j_2JOY=  
]f wW dtz1  
for (i = l; i <= mid; i++) { 8/u kzY1!  
temp = data; KR hls"\1  
} 2t{Tz}g*  
for (j = 1; j <= r - mid; j++) { XZ8]se"C  
temp[r - j + 1] = data[j + mid]; 6KN6SN$  
} zd F;!  
int a = temp[l]; &Fk|"f+  
int b = temp[r]; X .K*</(g  
for (i = l, j = r, k = l; k <= r; k++) { :inVwc  
if (a < b) { |^F$Ta  
data[k] = temp[i++]; j*1MnP3/8Y  
a = temp; F)/4#[  
} else { N1vA>(2A  
data[k] = temp[j--]; < 5ULu(b&$  
b = temp[j]; 7v.O Lp  
} j``Ku@/x0  
} _Ii=3Qsf  
} lC d\nE8G  
* $1F|G  
/** X>]<rEh  
* @param data yRQNmR;Uy  
* @param l 2:yXeSeA  
* @param i X1V~.k vt)  
*/ nKTi"2dm  
private void insertSort(int[] data, int start, int len) { a785xSUV  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v`6vc)>8  
} !l6ht {  
} Ru);wzky  
} @bnw$U`+  
} &{q'$oF  
6IJ;od.\b$  
堆排序: Ou f\%E<  
eOZ~p  
package org.rut.util.algorithm.support; C}9|e?R[Rz  
{q;_Dd  
import org.rut.util.algorithm.SortUtil; ,hT**(W  
xz +;1JAL3  
/** {q~N$"#  
* @author treeroot ~1S,[5u|s  
* @since 2006-2-2 F hyY+{%  
* @version 1.0 mFd|JbW  
*/ 5,Co(K  
public class HeapSort implements SortUtil.Sort{ jz\>VYi(7  
,bB}lU)  
/* (non-Javadoc) plNw>rFa  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iI*qx+>f?  
*/ 7|!Zx-}  
public void sort(int[] data) { ZHj7^y@P  
MaxHeap h=new MaxHeap(); t+0/$  
h.init(data); '68#7Hs.  
for(int i=0;i h.remove(); ;^)4u  
System.arraycopy(h.queue,1,data,0,data.length); ;L%\[H>G  
} =xb/zu(  
IiX2O(*ZE  
private static class MaxHeap{ `)BZk[64  
9wdX#=I  
void init(int[] data){ 0p\Kf(|E*6  
this.queue=new int[data.length+1]; IZd~Am3f  
for(int i=0;i queue[++size]=data; 1gLET.I:  
fixUp(size); p DU+(A4>  
} VArMFP)cz  
} `+UBl\j  
cf%2A1I2W  
private int size=0; zYftgH_o  
+)_DaL E  
private int[] queue; :8?l=B9("g  
CXi:?6OG  
public int get() { f\Q_]%^W  
return queue[1]; )|Ka'\xr  
} kn&BGYt  
N[yS heT  
public void remove() { Qv8 =CnuOT  
SortUtil.swap(queue,1,size--); W{ZJ^QAq/  
fixDown(1); C2DAsSw  
} GAh\ 6ul  
file://fixdown H8Z|gq1r  
private void fixDown(int k) { &nY#G HB  
int j; O}6*9Xy  
while ((j = k << 1) <= size) { ydE}.0zN  
if (j < size %26amp;%26amp; queue[j] j++; @?t+O'&  
if (queue[k]>queue[j]) file://不用交换 K>-01AGHL  
break; 0rAuK7  
SortUtil.swap(queue,j,k); Jl$ X3wE  
k = j; N4WX}  
} A 0;ng2&  
} e_1L J  
private void fixUp(int k) { xi)M8\K  
while (k > 1) { 5 <7sVd.  
int j = k >> 1; @ xTVX'$  
if (queue[j]>queue[k]) wV4MP1c$  
break; Nfmr5MU_  
SortUtil.swap(queue,j,k); TEC#owz  
k = j; }rWg ']  
} j`MK\*qmz  
} [Z!oVSCZD%  
+9# qNkP  
} "`* >co6r  
#smfOGSd  
} 58o&Dv6?  
U.N& ~S  
SortUtil: Xl>ZnI];  
# `@jVX0  
package org.rut.util.algorithm; +.xK`_[M  
Lu4>C2{  
import org.rut.util.algorithm.support.BubbleSort; $3eoZ1q'U-  
import org.rut.util.algorithm.support.HeapSort; VpED9l]y  
import org.rut.util.algorithm.support.ImprovedMergeSort; c/Li,9cT'  
import org.rut.util.algorithm.support.ImprovedQuickSort; Zk31|dL  
import org.rut.util.algorithm.support.InsertSort; 1I8<6pi-  
import org.rut.util.algorithm.support.MergeSort; WkPT6d  
import org.rut.util.algorithm.support.QuickSort; ._&SS,I5VZ  
import org.rut.util.algorithm.support.SelectionSort; ++=jh6  
import org.rut.util.algorithm.support.ShellSort; Y&$puiH-j  
x l=i_  
/** Lo=n)cV1,  
* @author treeroot Z55C4F5v  
* @since 2006-2-2 ]?Q<lMG  
* @version 1.0 >g{b'Xx  
*/ /!*=*  
public class SortUtil { 0sF|Y%N  
public final static int INSERT = 1; gYmO4/c,  
public final static int BUBBLE = 2; -Q%Pg<Q-#  
public final static int SELECTION = 3; SES-a Mi3  
public final static int SHELL = 4; Na+h+wD.D  
public final static int QUICK = 5; !y$+RA7\  
public final static int IMPROVED_QUICK = 6; "2PT]!  
public final static int MERGE = 7; hsYv=Tw3C  
public final static int IMPROVED_MERGE = 8; JX#0<U|L  
public final static int HEAP = 9; .(yJ+NU  
nB4+*=$E+-  
public static void sort(int[] data) { #jPn7  
sort(data, IMPROVED_QUICK); caV DV  
} OLqynY  
private static String[] name={ Fn{Pmo*rs  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lZ) qV!<  
}; U7-*]ik  
X-psao0tI`  
private static Sort[] impl=new Sort[]{ w`gT]Rn  
new InsertSort(), 6Q]JY,+  
new BubbleSort(), rshUF  
new SelectionSort(), 6LabFX@{&  
new ShellSort(), 7'|aEH  
new QuickSort(), t8*NldC  
new ImprovedQuickSort(), +/hd;s$x  
new MergeSort(), y!_8m#n S  
new ImprovedMergeSort(), 3kVN[0  
new HeapSort() Au:R]7   
}; z A/Fh(uX  
$\PU Y8  
public static String toString(int algorithm){ \(r$f!`  
return name[algorithm-1]; ; {v2s;  
}  #J  
*<X*)A{C  
public static void sort(int[] data, int algorithm) { |n~,{=  
impl[algorithm-1].sort(data); Mu6DT p~k  
} -]QP#_   
er3`ITp:dp  
public static interface Sort { CW]Th-xc  
public void sort(int[] data); @R(Op|9  
} A>_,tt  
Y) l=r^Ap>  
public static void swap(int[] data, int i, int j) { J :KU~`r  
int temp = data; q)J5tBfJ  
data = data[j]; DZ9^>`*  
data[j] = temp; x1Z*R+|>2  
} amWKykVS5  
} tjx|;m7  
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