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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。 CyzvQfpZr  
插入排序: 7<IrN\@U  
e<~uU9 lg1  
package org.rut.util.algorithm.support; .A\9|sRZ5  
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import org.rut.util.algorithm.SortUtil; Tud[VS?99  
/** &:akom8  
* @author treeroot 0e q>  
* @since 2006-2-2 9S=9m[#y'  
* @version 1.0 hS*3yCE"8  
*/ zoC/Hm  
public class InsertSort implements SortUtil.Sort{ >AN`L`%2  
U lj2 Py}  
/* (non-Javadoc) /  DeI s  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EZ1H0fm  
*/ 5SR 29Z[  
public void sort(int[] data) { ;]Y.2 J  
int temp; ZS>}NN  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); m[ay  
} K`(STvtM  
} d!G%n *  
} NjYpNd?g  
eW\7X%I  
} ll[U-v{  
KDRIy@[e  
冒泡排序: VH#]67  
rm2{PV<+d  
package org.rut.util.algorithm.support; OPwp(b  
z}8rD}BH  
import org.rut.util.algorithm.SortUtil; G!XizhE  
#jA|04w  
/**  $Jb+}mlT  
* @author treeroot W zy8  
* @since 2006-2-2 NkNw9?:#4  
* @version 1.0 9g^@dfBV  
*/ :#d$[:r#  
public class BubbleSort implements SortUtil.Sort{ D'Byl,W$   
Uk|Xs~@#E  
/* (non-Javadoc) d?b2jZ$r]  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )l[ +7  
*/ UbY-)9==  
public void sort(int[] data) { JY9Hqf  
int temp; e#FaK^V  
for(int i=0;i for(int j=data.length-1;j>i;j--){ sw{EV0&>m  
if(data[j] SortUtil.swap(data,j,j-1); `5[VO  
} ^L]+e  
} f`/JY!u j{  
} a(d'iAU8^  
} H'?Bx>X  
kRSu6r9  
} e/#4)@]  
1i bQ'bZ  
选择排序: WQiEQ>6(t(  
A){kitx-i)  
package org.rut.util.algorithm.support; *% Vd2jW/  
s) V7$D  
import org.rut.util.algorithm.SortUtil; KM< M^l_Q  
si3i#l&.b_  
/** qi7dcn@d  
* @author treeroot ?#pL\1"E  
* @since 2006-2-2 u"X8(\pOn  
* @version 1.0 >@ h0@N  
*/ (;~[}"  
public class SelectionSort implements SortUtil.Sort { VaVKWJg$  
N7+K$)3  
/* 0)k%nIhj  
* (non-Javadoc) 4?jhZLBU  
* 1m}'Y@I  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rZ:  
*/ dL6sb;7R  
public void sort(int[] data) { *=^_K`y  
int temp; 9DKmXL  
for (int i = 0; i < data.length; i++) { ik7#Og~ 3  
int lowIndex = i; L_)?5IOJ$  
for (int j = data.length - 1; j > i; j--) { 5!tmG- 'b  
if (data[j] < data[lowIndex]) { N4)& K[  
lowIndex = j; YA{Kgc^  
} [OH>NpL  
} T_v  
SortUtil.swap(data,i,lowIndex); ou,W|<%  
} nHyWb6  
} G\jr^d\  
5XFhjVmEL  
} EU>@k{Qt  
-_>c P  
Shell排序: 8ru@ 8|r  
F3';oyy  
package org.rut.util.algorithm.support; rAP+nh ans  
N|1J@"H  
import org.rut.util.algorithm.SortUtil;  78qf  
LP=!u~?  
/** =E4nNL?  
* @author treeroot 5jx{O${u  
* @since 2006-2-2 OK3B6T5w=  
* @version 1.0 wT*`Od8w  
*/ K# _plpr  
public class ShellSort implements SortUtil.Sort{ z_A%>E4  
4.H!rkMM  
/* (non-Javadoc) ``aoLQc`  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >%Y.X38Z[  
*/ ,A[HYc|uy  
public void sort(int[] data) { ]vKxgfF  
for(int i=data.length/2;i>2;i/=2){ .u W_(Rqg  
for(int j=0;j insertSort(data,j,i); gj6"U {D  
} `Bkba:  
} {oBVb{<  
insertSort(data,0,1); Z U f<s?  
} 6u8`,&U  
~aA+L-s|  
/** aW w`v[v  
* @param data [m}x  
* @param j .Ddl.9p5  
* @param i *zz/U (9D  
*/ ]r|.\}2Y7  
private void insertSort(int[] data, int start, int inc) { .!)7x3|$[  
int temp; BN#^ /a-  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); mI0| lp 1$  
} d{ OY  
} Z;WqKIM#  
} ~)oC+H@{  
u"C`S<c  
} TN/I(pkt1B  
L d#  
快速排序: 9&rn3hmP  
b-~`A;pr  
package org.rut.util.algorithm.support; :4(7W[r6  
e5veq!*C?  
import org.rut.util.algorithm.SortUtil; prIq9U|@  
/91H! s  
/** &^&k]JBaV  
* @author treeroot <@;eN&  
* @since 2006-2-2 jUBlIVl]  
* @version 1.0 J )@x:,o  
*/ ~POe0!}  
public class QuickSort implements SortUtil.Sort{ #H7(dT  
l9P~,Ec4''  
/* (non-Javadoc) ukG1<j7.  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ai#W. n  
*/ #-e3m/>  
public void sort(int[] data) { f"k/j?e*  
quickSort(data,0,data.length-1); j}0*`[c  
} <`6-J `.  
private void quickSort(int[] data,int i,int j){ T3M 4r|  
int pivotIndex=(i+j)/2; K;[V`)d'  
file://swap fFSW\4JD=  
SortUtil.swap(data,pivotIndex,j); OP:;?Fs9`  
tb0s+rb  
int k=partition(data,i-1,j,data[j]); 9H.E15B  
SortUtil.swap(data,k,j); u7a4taM$d  
if((k-i)>1) quickSort(data,i,k-1); 9%\q*  
if((j-k)>1) quickSort(data,k+1,j);   ;h  
.bL{fBTT~  
} LR9dQ=fHS  
/** T(ponLh  
* @param data `33h4G  
* @param i %o^'(L@z  
* @param j 6pr}A  
* @return OaU$ [Z'8  
*/ &?zJ|7rh@|  
private int partition(int[] data, int l, int r,int pivot) { @iWIgL  
do{ Q#:,s8TW[  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); To=1B`@-  
SortUtil.swap(data,l,r); v]_{oj_(-  
} +=O8t0y n  
while(l SortUtil.swap(data,l,r); rl4daV&,U  
return l; kw=+"U   
} A:NsDEt  
7cvbYP\<lv  
} sVh!5fby&  
kFuaLEJi  
改进后的快速排序: gI\J sN  
3+n&Ya1  
package org.rut.util.algorithm.support; \B2=E  
d@] 0 =Ax  
import org.rut.util.algorithm.SortUtil; PX]A1Kt?  
ShGR !r<  
/** &a48DCZ  
* @author treeroot rBgLj,/`U/  
* @since 2006-2-2 wPqIy}-  
* @version 1.0 Qj 0@^LA  
*/ ZH&%D*a&  
public class ImprovedQuickSort implements SortUtil.Sort { EZBk;*= B  
<M+ZlF-`  
private static int MAX_STACK_SIZE=4096; f}XUxIQ-<  
private static int THRESHOLD=10; B8w 0DJ  
/* (non-Javadoc) $:mCyP<y  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }.` ycLW'  
*/ . 1?AU 6\  
public void sort(int[] data) { WOgbz&S?J  
int[] stack=new int[MAX_STACK_SIZE]; v\\Z[,dK  
9LCV"xgX  
int top=-1; 6aMqU?-  
int pivot; U_M> Q_r(  
int pivotIndex,l,r; $C^94$W  
S=M$g#X`5  
stack[++top]=0; &x;v&  
stack[++top]=data.length-1; <R]?8L0{h  
B8B^@   
while(top>0){ ^>k[T.  
int j=stack[top--]; wU+ofj; +I  
int i=stack[top--]; !;iySRZr  
skZxR5v3~L  
pivotIndex=(i+j)/2; WnHf)(J`"  
pivot=data[pivotIndex]; `wk#5[Y_  
fdp/c wd  
SortUtil.swap(data,pivotIndex,j); \7("bB=  
q] ,&$d^@  
file://partition 3G5i+9Nt.L  
l=i-1; tr/S*0$  
r=j; M;3uG/E\  
do{ y4M<L. RO  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); Hyq| %\A  
SortUtil.swap(data,l,r); ~}wPiu,  
} roL~r`f`  
while(l SortUtil.swap(data,l,r); GH^i,88  
SortUtil.swap(data,l,j); PTL52+}/  
X3RpJ#m"'  
if((l-i)>THRESHOLD){ D!)'c(b  
stack[++top]=i; |!rD2T\Ef  
stack[++top]=l-1; dos$d3B4  
} rD<@$KpP  
if((j-l)>THRESHOLD){ gD&%$&q  
stack[++top]=l+1; +2C:]  
stack[++top]=j; e2/&X;2  
} h r t\  
[/5>)HK} C  
} `iQyKZS/+  
file://new InsertSort().sort(data);  dsJ}C|N  
insertSort(data); $WTu7lVV[1  
} #2x\d  
/** ~Bj-n6QDE  
* @param data \? MuORg  
*/ eFZ`0V0  
private void insertSort(int[] data) { f9OVylm  
int temp; (:E^} &A  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Jq?ai8  
} Ep?a1&b  
} ,'82;oP4  
} Zf(ucAhL  
8]2S'm xE  
} #M{}Grg  
0g`WRe  
归并排序: n6ud;jN|  
O6boTB_2  
package org.rut.util.algorithm.support; 6OIA>%{  
7jEAhi!Cq(  
import org.rut.util.algorithm.SortUtil; Z@~8iAgE  
W&Fa8  
/** <8j n_6  
* @author treeroot 3H4p$\; C  
* @since 2006-2-2 +J.^JXyp0  
* @version 1.0 5l{_E:.1  
*/ 51&wH  
public class MergeSort implements SortUtil.Sort{ 1v,4[;{  
N"HN] Y@w  
/* (non-Javadoc) ~_^nWT*BV  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2R|2yAh  
*/ 0/-[k  
public void sort(int[] data) { R,6?1Z:J  
int[] temp=new int[data.length]; EeL~`$f  
mergeSort(data,temp,0,data.length-1); !~>u\h  
} ` LU&]NS3  
6=|Q>[K  
private void mergeSort(int[] data,int[] temp,int l,int r){ @8V8gV? zm  
int mid=(l+r)/2; @R`OAd y  
if(l==r) return ; 9J l9\y9  
mergeSort(data,temp,l,mid); G0a UZCw  
mergeSort(data,temp,mid+1,r); @bD,^3U  
for(int i=l;i<=r;i++){ ^ "*r'  
temp=data; sQTW?KA-Te  
} NhpGa@[D  
int i1=l; n;2W=N?y  
int i2=mid+1; &w LI:x5  
for(int cur=l;cur<=r;cur++){ s_E iA _  
if(i1==mid+1) {^$rmwN  
data[cur]=temp[i2++]; {?eD7xL:-  
else if(i2>r) `q4\w[0+p  
data[cur]=temp[i1++]; Lo9+#ITyx  
else if(temp[i1] data[cur]=temp[i1++]; ^Z\1z!{R  
else IjNE1b$  
data[cur]=temp[i2++]; \kC/)d  
} ]FsPlxk6  
} >f}rM20Vm  
Eepy%-\  
} -C.eXR{s  
$yc&f(Tv  
改进后的归并排序: ^\Jg {9a  
h9SS o0]F  
package org.rut.util.algorithm.support; b:W]L3Z8  
C 5)G^  
import org.rut.util.algorithm.SortUtil; /UM9g+Bb  
W}JJaZR*X  
/** njvmf*A?S  
* @author treeroot ow]n)Te  
* @since 2006-2-2 8 I,(\<Xv  
* @version 1.0 "64pVaT4  
*/ H:p(C?tk{  
public class ImprovedMergeSort implements SortUtil.Sort { fa"eyBO50  
E)>6}0P  
private static final int THRESHOLD = 10; ]$KH78MTW  
E~{-RZNK  
/* rK)%n!Z  
* (non-Javadoc) S(/@.gI:f  
* *|hICTWL  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \XmtSfFC  
*/ d4A}BTs1  
public void sort(int[] data) { "f5u2=7 }  
int[] temp=new int[data.length]; ^VoQGP/cl  
mergeSort(data,temp,0,data.length-1); >;0z-;k6  
} 4[rD|  
rP#@*{";  
private void mergeSort(int[] data, int[] temp, int l, int r) { PvKe|In(  
int i, j, k; TC J\@|yw  
int mid = (l + r) / 2; = `70]%  
if (l == r) .RoO 6:T6  
return; P_Po g^  
if ((mid - l) >= THRESHOLD) xR;Xx;  
mergeSort(data, temp, l, mid); :'.-*Ew  
else G}] ZZ  
insertSort(data, l, mid - l + 1); 2t#9ih"9  
if ((r - mid) > THRESHOLD) kA\;h|Y3  
mergeSort(data, temp, mid + 1, r); a08B8  
else 7r*>?]y+  
insertSort(data, mid + 1, r - mid); AF **@iG  
];j8vts&  
for (i = l; i <= mid; i++) { A\k-OP]  
temp = data; =XudL^GF  
} Awe\KJ^`  
for (j = 1; j <= r - mid; j++) { WET $H,  
temp[r - j + 1] = data[j + mid]; 5%,n[qj4IT  
} .DCp)&m l;  
int a = temp[l]; 9l OUE  
int b = temp[r]; 'Y>!xm   
for (i = l, j = r, k = l; k <= r; k++) { u4fTC})4{C  
if (a < b) { vjbot^W9  
data[k] = temp[i++]; :=*>:*.Kb  
a = temp; o3}12i S  
} else { `| R8WM  
data[k] = temp[j--]; *1%=?:$(r6  
b = temp[j]; ?MO'WB9+JR  
} `4Nc(aUr  
} `4l>%S8y:  
} %3"3OOT7  
V}@c5)(j  
/** bCA3w%,kM  
* @param data ]:]2f 9y  
* @param l )mwY] !  
* @param i nef-xxXC^I  
*/ uCmdNY  
private void insertSort(int[] data, int start, int len) { !A!zG)Ue<  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uA\A4  
} v }P~g  
} ;#f_e;  
} j:U>V7Kn3~  
} I%{U~  
KAEf4/  
堆排序: cF,u)+2b|6  
D {>, 2hC  
package org.rut.util.algorithm.support; 0Wv9K~F  
Wpj.G  
import org.rut.util.algorithm.SortUtil; nc@ul')  
x-Xb4?{  
/** 6^|bKoN/ f  
* @author treeroot ux{OgF fi  
* @since 2006-2-2 ?55('+{l  
* @version 1.0 PS \QbA  
*/ EA?:GtH  
public class HeapSort implements SortUtil.Sort{ TSE(Kt  
C8NbxP  
/* (non-Javadoc) yHT}rRS8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tk_y~-xz  
*/ o&I 0*~ sN  
public void sort(int[] data) { y]cx}9~  
MaxHeap h=new MaxHeap(); VVCCPK^<  
h.init(data); f\/};a  
for(int i=0;i h.remove(); 7_q"%xH  
System.arraycopy(h.queue,1,data,0,data.length); Uf_w o  
} dbnH#0i  
<8-I:o]mF  
private static class MaxHeap{ 9x{T"'  
;x+4jpH]B  
void init(int[] data){ x40R)Led  
this.queue=new int[data.length+1]; Mzxz-cE  
for(int i=0;i queue[++size]=data; MZ0uc2L=  
fixUp(size); 0r+-}5aSl5  
} [iL2c=_  
} jY ^ndr0;  
]1D>3  
private int size=0; 7W}~c/%  
6jF~zI^  
private int[] queue; kv`x  
r!Mr\  
public int get() { Q9W*)gBv n  
return queue[1]; a$9UUH-|  
} T_YN^za(q  
i_gS!1Z2  
public void remove() { f_;3|i  
SortUtil.swap(queue,1,size--); %!YsSk,   
fixDown(1);  ocL  
} Z < uwqA  
file://fixdown Rs<,kMRGVL  
private void fixDown(int k) { EcwH O  
int j; P=u)Q _  
while ((j = k << 1) <= size) { nc$?tC9V  
if (j < size %26amp;%26amp; queue[j] j++; 1d-j_ H`s  
if (queue[k]>queue[j]) file://不用交换 %NxNZe  
break; <NS= <'U  
SortUtil.swap(queue,j,k); ;5y!,OF6  
k = j; 5]'iSrp  
} n7{1m$/  
} !kmo% +  
private void fixUp(int k) { (v(_ XlMK  
while (k > 1) { `bt]v$  
int j = k >> 1; frGUT#9?n  
if (queue[j]>queue[k]) (S9"(\A  
break; XV+BSW7}  
SortUtil.swap(queue,j,k); qZ8lU   
k = j; |wK)(s  
} cH2 nG:H  
} TR ]lP<m  
{9C(\i +  
} v SWqOv$  
{/B) YR  
} s'LG3YV-<  
+8 6\&y)  
SortUtil: ;5 IS58L  
NK,)"WE  
package org.rut.util.algorithm; ugMJ}IGq  
=E |[8 U)  
import org.rut.util.algorithm.support.BubbleSort; ym,S /Uz  
import org.rut.util.algorithm.support.HeapSort; ]YOQIzkL4}  
import org.rut.util.algorithm.support.ImprovedMergeSort; }m0Lr:vq<r  
import org.rut.util.algorithm.support.ImprovedQuickSort; M5P63=1+  
import org.rut.util.algorithm.support.InsertSort; FIG5]u  
import org.rut.util.algorithm.support.MergeSort; w(mn@Qc  
import org.rut.util.algorithm.support.QuickSort; FK mFjqY  
import org.rut.util.algorithm.support.SelectionSort; q8[Nr3.  
import org.rut.util.algorithm.support.ShellSort; xES+m/?KlZ  
6EPC$*Xp!  
/** drb_GT  
* @author treeroot #uey1I@"9  
* @since 2006-2-2 &,KxtlR![  
* @version 1.0 ;39{iU. m  
*/ h]MSjC.X  
public class SortUtil { 9)f1CC]  
public final static int INSERT = 1; ?w<x_Lo  
public final static int BUBBLE = 2; S!.xmc\  
public final static int SELECTION = 3; m=y6E, _  
public final static int SHELL = 4; #*Mk@XrV  
public final static int QUICK = 5; *23  
public final static int IMPROVED_QUICK = 6; iB]kn(2C  
public final static int MERGE = 7; ?(g kk YI  
public final static int IMPROVED_MERGE = 8; 4&`66\p;  
public final static int HEAP = 9; I~q}M!v~  
%t<Y6*g  
public static void sort(int[] data) { <v5toyA  
sort(data, IMPROVED_QUICK); J'B;  
} J^t=.-a|  
private static String[] name={ 8<_WtDg  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L^ +0K}eD  
}; B]]M?pS  
Dvx"4EA{7{  
private static Sort[] impl=new Sort[]{ zIdQ^vm8Q  
new InsertSort(), *>\RGL;]8  
new BubbleSort(), f_z2d+  
new SelectionSort(), ?BWWb   
new ShellSort(), RNi&OG(  
new QuickSort(), Oe;9[=L[  
new ImprovedQuickSort(), {J99F  
new MergeSort(), 8#kFS@  
new ImprovedMergeSort(), ` 0\hm`  
new HeapSort() xRaYm  
}; WP}__1!%u  
4Y-9W2s  
public static String toString(int algorithm){ o +aB[+  
return name[algorithm-1]; qrt+{5/t  
} -Mv`|odY/  
x80~j(uVf  
public static void sort(int[] data, int algorithm) { "`&?<82  
impl[algorithm-1].sort(data); j l7e6#zu  
} M5%xp.B  
@${!C\([1  
public static interface Sort { ("{AY?{{  
public void sort(int[] data); $s) ^zm~  
} j"YJ1R-5  
Q |l93Rb`  
public static void swap(int[] data, int i, int j) { pq4+n'uO  
int temp = data; 4vy!'r@   
data = data[j]; _ H@pYMNH  
data[j] = temp; H M76%9!  
} jMw;`yh  
} (:hPT-1  
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