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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。 6}zargu(;  
插入排序: .\K0+b;  
#/a>dK  
package org.rut.util.algorithm.support; 4jMC E&<  
T{-<G13  
import org.rut.util.algorithm.SortUtil; c@!%.# |y  
/** [+<lm 5t  
* @author treeroot f mu `o-  
* @since 2006-2-2 $Tci_(V=F  
* @version 1.0 ?UCK  
*/ >|Ps23J#  
public class InsertSort implements SortUtil.Sort{ N=R|s$,Oy9  
O}5mDx  
/* (non-Javadoc) %s<7 M@]f  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `IL''eJug_  
*/ \@8j&],dl  
public void sort(int[] data) { 8D7 = ]  
int temp; WfYu-TK *  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); VX#4Gh,~N  
} faH113nc  
} |t](4  
} /sVy"48-  
B=?4; l7  
} E{+V_.tlu  
80=6B  
冒泡排序: }Fy~DsQ  
Hq=5/N  
package org.rut.util.algorithm.support; X.TsOoy  
8Ac5K!  
import org.rut.util.algorithm.SortUtil; 9,8}4Y=GVI  
92zo+bc  
/** $}kT )+K  
* @author treeroot Z#w@ /!"}T  
* @since 2006-2-2 0G@sj7)]  
* @version 1.0 h2M>4c  
*/ !##OQ  
public class BubbleSort implements SortUtil.Sort{ 7&-i :2  
Ps=OL\i  
/* (non-Javadoc) B"sQ\gb%Q  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7\ELr 5  
*/ DPIIE2X  
public void sort(int[] data) { .[YM0dt  
int temp; .KH3.v/c|  
for(int i=0;i for(int j=data.length-1;j>i;j--){ (`%$Aa9J  
if(data[j] SortUtil.swap(data,j,j-1); c!#DD;<Q  
} Wc] L43u  
} lxsBXXZg  
} Wl!|+-  
} ;#c=0*.  
'Bul_D4B  
} Dxj&9Ra  
]!l]^/ .  
选择排序: Y*oT (  
H$GJpXIb  
package org.rut.util.algorithm.support; %-u Ra\  
9cV;W\ Tw  
import org.rut.util.algorithm.SortUtil; )q#1C]7m*  
cO}`PD$i  
/** 7Uy49cs,  
* @author treeroot gr]:u4}  
* @since 2006-2-2 `rt?n|*QF  
* @version 1.0 Hqsj5j2i  
*/ 9em?2'ysa  
public class SelectionSort implements SortUtil.Sort { y"5>O|`  
w=]id'`?q  
/* yffg_^fR  
* (non-Javadoc) E"8cB]`|8  
* H<6TN^  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %p?+r  
*/ ean_/E  
public void sort(int[] data) { i n}N[  
int temp; >;|~ z\8  
for (int i = 0; i < data.length; i++) { {{'GR"D  
int lowIndex = i; =Yd{PZ*fR  
for (int j = data.length - 1; j > i; j--) { Hrz #So\#  
if (data[j] < data[lowIndex]) { 9/[1a_ r  
lowIndex = j; A^\A^$|O6  
} Ns3k(j16  
} *>b*I4dz  
SortUtil.swap(data,i,lowIndex); j2\B(PA  
} urM=l5Sx  
} 1D@'uApi.  
fcDiYJC*  
} P'wn$WE[n\  
(A@~]N ,U/  
Shell排序: Z+# =]Kw)  
^Bkwbj  
package org.rut.util.algorithm.support; <K6:"  
S(bYN[U  
import org.rut.util.algorithm.SortUtil; RZKdh}B?\  
2h Wtpus  
/** h?cf)L  
* @author treeroot fU?P__zU4  
* @since 2006-2-2 e15_$M;RW  
* @version 1.0 Atdr|2  
*/ $?voQ&  
public class ShellSort implements SortUtil.Sort{ ="yN4+0-p  
m*'^*#  
/* (non-Javadoc) R<"fcsU  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <m") 2dJ  
*/ d#Hl3]wT  
public void sort(int[] data) { 6I5,PB  
for(int i=data.length/2;i>2;i/=2){ 6.uyY@Yx  
for(int j=0;j insertSort(data,j,i); v$H=~m  
} @jXdQY%{  
} <o JM||ZA  
insertSort(data,0,1); dCbRlW  
} S!\4,6  
e7T}*Up  
/** +`y{r^xD  
* @param data ihv=y\Jt  
* @param j `,-w+3?Al  
* @param i BYh F?  
*/ uv&??F]/  
private void insertSort(int[] data, int start, int inc) { D's Tv}P  
int temp; pQ:7%+Om  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); y;'yob  
} QJeL&mf  
} '>8IOC  
} <FaF67[Q  
8XS_I{}?  
} ](^$5Am  
H%`$@U>  
快速排序: ef !@|2  
{>x6SVF  
package org.rut.util.algorithm.support; P@LFX[HtM  
&?(<6v7  
import org.rut.util.algorithm.SortUtil; [:vH_(|  
4Lg!54P8  
/** eootH K  
* @author treeroot V*}xlxSL  
* @since 2006-2-2 !]^,!7x,8j  
* @version 1.0 F!N D  
*/ NU]+ {7  
public class QuickSort implements SortUtil.Sort{ ?%QWpKO7X  
o7_*#5rD  
/* (non-Javadoc) #8cpZ]#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O_gr{L}  
*/ {c(@u6l28  
public void sort(int[] data) { xZMQ+OW2i  
quickSort(data,0,data.length-1); 5mtsN#  
} zCpsGr  
private void quickSort(int[] data,int i,int j){ &3@ {?K  
int pivotIndex=(i+j)/2; IdHyd Y1  
file://swap %a'Nf/9=:  
SortUtil.swap(data,pivotIndex,j); <`PW4zSI  
Za"m;+H<E  
int k=partition(data,i-1,j,data[j]); !Dc|g~km\  
SortUtil.swap(data,k,j); V:YN!  
if((k-i)>1) quickSort(data,i,k-1); ~!t#M2Sk  
if((j-k)>1) quickSort(data,k+1,j);  xJ&E2Bf  
RWX?B  
} QsO%m  
/** \/wbk`2  
* @param data C>}@"eK  
* @param i %>)HAx `  
* @param j CXAW>VdK_  
* @return nfj8z@!  
*/ ls;!Og9  
private int partition(int[] data, int l, int r,int pivot) { <~d3L4h*<  
do{ B IW?/^  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); iJ-z&=dOe  
SortUtil.swap(data,l,r); lR<1x  
} [|5gw3 y  
while(l SortUtil.swap(data,l,r); \H^A@f  
return l; X&bz%I>v  
} fRt`]o:Om  
Ad:}i9-x  
} EuJ_UxkG  
O4+a[82  
改进后的快速排序: P( Gv|Q@  
uQ(C,f[6p  
package org.rut.util.algorithm.support; # $N)  
E"/r*C+T  
import org.rut.util.algorithm.SortUtil; Ifx EM  
t.s;dlx[@  
/** ]"wl*$N  
* @author treeroot 8@)4)+e  
* @since 2006-2-2 5s7C;+  
* @version 1.0 z1AYXW6F  
*/ 1Zr J7a7=  
public class ImprovedQuickSort implements SortUtil.Sort { "sD[P3  
(#)-IdXXO<  
private static int MAX_STACK_SIZE=4096; ,E._A(Z  
private static int THRESHOLD=10; \>G:mMk/  
/* (non-Javadoc) 0#/NZO  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u)hr  
*/ f[XsnN2  
public void sort(int[] data) { r@30y/C  
int[] stack=new int[MAX_STACK_SIZE]; a,/wqX  
'gaa@ !bg  
int top=-1; M^6!{c=MIi  
int pivot; C/JFb zVx  
int pivotIndex,l,r; pm4'2B|)g  
F7"v}K]X  
stack[++top]=0; ; *ZiH%q,  
stack[++top]=data.length-1; n N_Ylw  
-50 Nd=1  
while(top>0){ fZ6-ap,u  
int j=stack[top--]; ,q".d =6  
int i=stack[top--]; eoGGWW@[  
5ns.||%k  
pivotIndex=(i+j)/2; jE#&u DfI  
pivot=data[pivotIndex]; ,,Ia4c  
bT8 ?(Iu  
SortUtil.swap(data,pivotIndex,j); \'>8 (i~  
iD(+\:E  
file://partition #;lB5) oe  
l=i-1; &Sr7?u`k  
r=j; U4.- {.  
do{ ;+Sc Vz  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); d%(4s~y  
SortUtil.swap(data,l,r); FSNzBN  
} >hFg,5 _l3  
while(l SortUtil.swap(data,l,r); .wPu #*  
SortUtil.swap(data,l,j); k@Q>(`  
/ygC_,mx  
if((l-i)>THRESHOLD){ S [=l/3c  
stack[++top]=i; y88lkV4a  
stack[++top]=l-1; 9x]yu6  
} qrLE1b 1$  
if((j-l)>THRESHOLD){ SO#R5Mu2N  
stack[++top]=l+1; tB<2mjg  
stack[++top]=j; v-MrurQ4  
} d^:(-2l-  
?AlTQL~c  
} a{y"vVQOF  
file://new InsertSort().sort(data); gwQk M4  
insertSort(data); 4f-I,)qCBk  
} O Bp&64  
/** W*!u_]K>  
* @param data !C>'a:  
*/ \)/dFo\l  
private void insertSort(int[] data) { BK[ YX)  
int temp; M!#[(:  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); lDf:~  
} IV]2#;OO?  
} fEYo<@5c]  
} |K11Woii  
?E|be )  
} =K`]$Og}8  
*D:"I!Ho  
归并排序: &`}8Jz=S  
T/YvCbo  
package org.rut.util.algorithm.support; Eq82?+9  
B.ar!*X  
import org.rut.util.algorithm.SortUtil; Y5XhV;16  
nu!tk$Q  
/** ^1jZwP;5eW  
* @author treeroot [+_0y[~,tB  
* @since 2006-2-2 k4!z;Yq  
* @version 1.0 S>N/K  
*/ y7LT;`A  
public class MergeSort implements SortUtil.Sort{ f{j.jfl\x  
zjlo3=FQX[  
/* (non-Javadoc) R;3Tyn+  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T!3_Q/~^r  
*/ .KX LWH  
public void sort(int[] data) { ;z3w#fNMv  
int[] temp=new int[data.length]; Yd>ej1<  
mergeSort(data,temp,0,data.length-1); Xt%>XP  
} e nw7?|(  
3w!,@=.q  
private void mergeSort(int[] data,int[] temp,int l,int r){ BSc5@;  
int mid=(l+r)/2; 8^U+P%  
if(l==r) return ; 863PVce",}  
mergeSort(data,temp,l,mid); =zX A0%  
mergeSort(data,temp,mid+1,r); kA/V=xO<  
for(int i=l;i<=r;i++){ \66j4?H#  
temp=data; 0<4Sw j3s7  
} \NTNB9>CO  
int i1=l; l99{eD  
int i2=mid+1; bPhbd  
for(int cur=l;cur<=r;cur++){ fd&=\~1_$  
if(i1==mid+1) YjTA+1}  
data[cur]=temp[i2++]; xZ.c@u6:  
else if(i2>r) ^Ss4<  
data[cur]=temp[i1++]; WY`hNT6M  
else if(temp[i1] data[cur]=temp[i1++]; RLL2'8"A  
else jxdxIkAHZc  
data[cur]=temp[i2++]; 0f]LOg  
} nApkK1?  
} k\wcj^"cb  
^a?H "  
} $Eh8s(  
\UR/tlw+/  
改进后的归并排序: DAHQ7#qfQC  
cUPC8k.1  
package org.rut.util.algorithm.support; <RPy   
.V'=z|   
import org.rut.util.algorithm.SortUtil; ~V?3A/]  
<-%OXEG  
/** Ljq!\D  
* @author treeroot P3u,)P&  
* @since 2006-2-2 1~_&XNb&  
* @version 1.0 qt&zo5  
*/ c=Y8R/G<  
public class ImprovedMergeSort implements SortUtil.Sort { p#6V|5~8  
fD:>cje  
private static final int THRESHOLD = 10; Eg;xj@S<2  
SPEDN}/^  
/* [ta3sEPjs  
* (non-Javadoc) v<SCh)[-p  
*  d(>  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )?qH#>mD6  
*/ yD n8{uI  
public void sort(int[] data) { /`"&n1  
int[] temp=new int[data.length]; U 2@Mxw  
mergeSort(data,temp,0,data.length-1); ocbNf'W;  
} m=.}}DcSs  
zJCm0HLJ  
private void mergeSort(int[] data, int[] temp, int l, int r) { f:6%DT~a&C  
int i, j, k; 5J0Sc  
int mid = (l + r) / 2; 3.vQ~Fvl  
if (l == r) (}:n#|,{M  
return; o 2Okc><z  
if ((mid - l) >= THRESHOLD) Y#[>j4<T  
mergeSort(data, temp, l, mid); bo%v(  
else Bx&F*a;5  
insertSort(data, l, mid - l + 1); fj,]dQ T  
if ((r - mid) > THRESHOLD) <z+b88D  
mergeSort(data, temp, mid + 1, r); 8ta`sNy9  
else sKU?"|G81G  
insertSort(data, mid + 1, r - mid); ,*}5xpX  
7Rix=*  
for (i = l; i <= mid; i++) { x-3!sf@  
temp = data; ( 8}'JvSu  
} hr)CxsPoRQ  
for (j = 1; j <= r - mid; j++) { sH}q&=  
temp[r - j + 1] = data[j + mid]; :lGH31GG  
} 2-#:Y  
int a = temp[l]; <Z6tRf;B  
int b = temp[r]; |m5 E%E  
for (i = l, j = r, k = l; k <= r; k++) { qV`JZ\n  
if (a < b) { `OP?[ f d  
data[k] = temp[i++]; ?*ni5\y5o  
a = temp; 'dFhZ08 u}  
} else { P O{1u%P  
data[k] = temp[j--]; ^3:y<{J  
b = temp[j]; 5f'<0D;K  
} C1 YG=!  
} xU5+"t~  
} *[MK{m  
_ o-lNt+  
/** ])YGeY(V0+  
* @param data YEB@p.  
* @param l  :Ky *AI  
* @param i eJm7}\/6`  
*/ buv*qPO  
private void insertSort(int[] data, int start, int len) { ^twJNm{99  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q'mLwD3>  
} y_Tc$g~  
} S5$sB{\R  
} D#?jddr-  
} 1; "t8.*%e  
+#|):aF  
堆排序: v1E=P7}\{s  
djxM/"xo  
package org.rut.util.algorithm.support; W18I"lHeh  
,& ^vc_}  
import org.rut.util.algorithm.SortUtil; xO<$xx  
(3;dtp>Xx  
/** .}V&*-ep  
* @author treeroot cx(W{O"Jb  
* @since 2006-2-2 nfV32D|3  
* @version 1.0 5v uB87`  
*/ U.[?1:v  
public class HeapSort implements SortUtil.Sort{ V>2mz c  
0B;cQSH!q  
/* (non-Javadoc) s, 8a1o  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jD eNCJ  
*/ %%w/;o!c  
public void sort(int[] data) { jW G=k#WN  
MaxHeap h=new MaxHeap(); / W,K% s]  
h.init(data); i(k]}Di:  
for(int i=0;i h.remove(); R1%2]?  
System.arraycopy(h.queue,1,data,0,data.length); {MaFv  
} l6C^,xU~IX  
$j\UD8Hj'-  
private static class MaxHeap{ ~GWn>  
h6Vm;{ ~  
void init(int[] data){ <%2A, Vz"  
this.queue=new int[data.length+1]; EpO5 _T_  
for(int i=0;i queue[++size]=data; t#0/_tD  
fixUp(size); dK45&JHoW^  
} HcrI3v|6  
} ]-D;t~  
1;4 ] HNI  
private int size=0; #''q :^EQ  
+[DL]e]@U  
private int[] queue; bS9<LQ*  
0K&\5xXM  
public int get() { Viu+#J;l  
return queue[1]; v .ftfL!  
} ,;2x.We  
J"x M[c2  
public void remove() { x-e?94}^  
SortUtil.swap(queue,1,size--); r95l.v  
fixDown(1); "^~>aVuXf  
} 7D;g\{>M  
file://fixdown '<v/Gl\  
private void fixDown(int k) { &$vW  
int j; 73C  
while ((j = k << 1) <= size) { AV0C9a/td  
if (j < size %26amp;%26amp; queue[j] j++; #h 4`f  
if (queue[k]>queue[j]) file://不用交换 ![v@+9  
break; w;;.bz m  
SortUtil.swap(queue,j,k); -cjwa-9 ~  
k = j; Ikkv <uY  
} Y68T&swD  
} :PrQ]ss@C5  
private void fixUp(int k) { !U@?Va~Zn  
while (k > 1) { E,#J\)'z  
int j = k >> 1; WaV P+Ap  
if (queue[j]>queue[k]) 0wzq{~\{=_  
break; S'I{'jP5  
SortUtil.swap(queue,j,k); +N9(o+UrU  
k = j; f8Xe%"<  
} s57-<&@J9  
} @CSTp6{y  
#NAlje(7  
} 95,{40;X7  
*Q<%(JJ  
} |$r|DX1[  
B@,L83  
SortUtil: &DMKZMj<Q*  
DO!?]"  
package org.rut.util.algorithm; 31n5n  
S=^a''bg  
import org.rut.util.algorithm.support.BubbleSort; S)@95pb  
import org.rut.util.algorithm.support.HeapSort; cNW [i"  
import org.rut.util.algorithm.support.ImprovedMergeSort; P8JN m"C  
import org.rut.util.algorithm.support.ImprovedQuickSort; 0@9.h{s@  
import org.rut.util.algorithm.support.InsertSort; uM8YY[b  
import org.rut.util.algorithm.support.MergeSort; *S).@j\{W  
import org.rut.util.algorithm.support.QuickSort; BVx: JiA  
import org.rut.util.algorithm.support.SelectionSort; (]|rxmycA  
import org.rut.util.algorithm.support.ShellSort; # !?5^O  
|/?)u$U<  
/** rKDMIECrm  
* @author treeroot 2Et7o/\<  
* @since 2006-2-2 k-LB %\p  
* @version 1.0 m,e @bJ-  
*/ !!=%ty  
public class SortUtil { ):. +u=  
public final static int INSERT = 1; S.9ki<  
public final static int BUBBLE = 2; qp-/S^%  
public final static int SELECTION = 3; lg0iNc!  
public final static int SHELL = 4; C ^@~  
public final static int QUICK = 5; R~,*W1G6sF  
public final static int IMPROVED_QUICK = 6; "RG.27  
public final static int MERGE = 7; vG'JMzAm  
public final static int IMPROVED_MERGE = 8; Vo%MG.IPB  
public final static int HEAP = 9; F<y5zqGy@  
%bnDxCj"  
public static void sort(int[] data) { =TDK$Ek  
sort(data, IMPROVED_QUICK); Bf Lh%XC  
} qY24Y   
private static String[] name={ > Xq:?}-m2  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +"!,rZ7,A  
}; _5^p+  
V  `KXfY  
private static Sort[] impl=new Sort[]{ U@<>2  
new InsertSort(), Ix,`lFbH  
new BubbleSort(), N#')Qz:P  
new SelectionSort(), Go}C{(4T  
new ShellSort(), I$4GM  
new QuickSort(), _LV;q! /j  
new ImprovedQuickSort(), =Tf uwhV  
new MergeSort(), af]&3(33  
new ImprovedMergeSort(), *`:zSnu  
new HeapSort() iPMI$  
}; xf8C$|,  
zof>S>5>R7  
public static String toString(int algorithm){ A f@IsCOJ  
return name[algorithm-1]; 1"r6qYN!>  
} }bG|(Wp9  
nT0FonK>  
public static void sort(int[] data, int algorithm) { W@w#A]  
impl[algorithm-1].sort(data); o$4n D#P3  
} L Ty [)  
bz[+g,e2oA  
public static interface Sort { +Io[o6*  
public void sort(int[] data); NTk"W!<Cl2  
} {]~b^=qE$  
dZ&/Iz  
public static void swap(int[] data, int i, int j) { odPq<'V|AY  
int temp = data; [-cYFdt"V  
data = data[j]; +*3\ C!  
data[j] = temp; 317Lv \[  
} vcsi @!   
} 00'R1q4  
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