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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。 ikv Wh<=>H  
插入排序: ''\O v  
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package org.rut.util.algorithm.support; +2&@x=xy  
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import org.rut.util.algorithm.SortUtil; N%*5T[.  
/** NP/Gn6fr  
* @author treeroot f m)pulz  
* @since 2006-2-2 'g m0)r  
* @version 1.0 A"G 1^8wvX  
*/ ^Uf]Q$uCjE  
public class InsertSort implements SortUtil.Sort{ G'ei/Me6{  
B=^)Ub5'  
/* (non-Javadoc) hUp.tK:X7o  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !FElW`F  
*/ [k;\SXDZo  
public void sort(int[] data) { w"cZHm  
int temp; IV\'e}  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); %~2YE  
} g| vNhq0|i  
} zU gE~  
} |6K+E6H  
#\ X#w<\?  
} rp!oO>F  
4hTMbS_;  
冒泡排序: C,ARXW1  
\1fN0e  
package org.rut.util.algorithm.support; hM6PP7XH  
@ W[f1  
import org.rut.util.algorithm.SortUtil; ,>0*@2  
eQp4|rf  
/** KmA;HiH%J  
* @author treeroot $+Z)  
* @since 2006-2-2 "2)H'<  
* @version 1.0 ]dGw2y  
*/ .ZVUd84B  
public class BubbleSort implements SortUtil.Sort{ \%f q  
uF9C -H@:  
/* (non-Javadoc) 8T!+ZQAz  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QSszn`e  
*/ pgQV/6  
public void sort(int[] data) { 4GY[7^  
int temp; Rld!,t  
for(int i=0;i for(int j=data.length-1;j>i;j--){ 1+jAz`nA:T  
if(data[j] SortUtil.swap(data,j,j-1); qQ?"@>PALD  
} -y8`yHb_  
} =E.t`x=  
}  ]%wVHC  
} N`L0Vd  
=WyZX 7@R  
} LE9(fe) fe  
ebUBrxZX  
选择排序: 1p/3!1  
V@ cM|(  
package org.rut.util.algorithm.support; #t: S.A@  
XBb~\p3y  
import org.rut.util.algorithm.SortUtil; KLitg6&P  
8&?s#5zA  
/** i]6`LqlO  
* @author treeroot ->g*</  
* @since 2006-2-2 '%dfz K*Z  
* @version 1.0 x,|hU@h  
*/ V C24sU  
public class SelectionSort implements SortUtil.Sort { V-Sd[  
h?BFvbAt  
/* T"E6y"D  
* (non-Javadoc) i+S) K  
* YW_Q\|p]M  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1m:XR0P  
*/ Sjyoc<Uo  
public void sort(int[] data) { 17oa69G  
int temp; Q@<S[Qh[.  
for (int i = 0; i < data.length; i++) { S+atn]eU@  
int lowIndex = i; z$/_I0[  
for (int j = data.length - 1; j > i; j--) { ;*:]*|bw  
if (data[j] < data[lowIndex]) { f78An 8  
lowIndex = j; >0p h9$  
} Mn2QZp4  
} j3{I /m  
SortUtil.swap(data,i,lowIndex); )FF>IFHG  
} >*#1ZB_l  
} j/r]wd"aUS  
r? NznNVU  
} =|3ek  
T92UeG  
Shell排序: X(]WVCu  
_wkVwPr  
package org.rut.util.algorithm.support; |)b6>.^  
H%UL%l$  
import org.rut.util.algorithm.SortUtil; f]`#J%P  
TMlP*d#  
/** wVicyiY]  
* @author treeroot oX S1QT`B  
* @since 2006-2-2 gQxbi1!;9  
* @version 1.0 ur$ _  
*/ #fM#p+v  
public class ShellSort implements SortUtil.Sort{ `e}bdj  
ftvG\Tf  
/* (non-Javadoc) ~sl{|E  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =vDEfO/T  
*/ =BSzsH7  
public void sort(int[] data) { "a ueL/dgN  
for(int i=data.length/2;i>2;i/=2){ F)&@P-9+  
for(int j=0;j insertSort(data,j,i); #(#Wv?r6  
} 3DiLk=\~  
} \W1,F6&j  
insertSort(data,0,1); R7$:@<:g  
} 9[b<5Llt  
Q[vJqkgT  
/** wRcAX%n&  
* @param data CFzNwgv]z  
* @param j Rz bj  
* @param i s>;v!^N?u  
*/ 4zev^FR  
private void insertSort(int[] data, int start, int inc) { bJRN;g  
int temp; 66/3|83Z  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); 5][Ztx  
} s \;"X  
} \`oT#|0  
} 0B@SN)<kH  
/y _O 4  
} %{AO+u2i  
01r 8$+  
快速排序: 8$85^Of  
k2c}3 MeP  
package org.rut.util.algorithm.support; 6x h:/j3  
xy5lE+E_U  
import org.rut.util.algorithm.SortUtil; ,&j hlZ i  
a`&f  
/** 96 q_ K84K  
* @author treeroot 0E,8R{e  
* @since 2006-2-2 0 fF(Z0R,  
* @version 1.0 Pz>s6 [ob  
*/ !c}O5TI|#  
public class QuickSort implements SortUtil.Sort{ hd>aZ"nm1  
_/uFsYC  
/* (non-Javadoc) K/tRe/t }  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6-yd]("  
*/ "U!AlZ`g  
public void sort(int[] data) { WG N=Y~E  
quickSort(data,0,data.length-1); d F9!G;V  
} =yr0bGy`-  
private void quickSort(int[] data,int i,int j){ y4*U6+#.  
int pivotIndex=(i+j)/2; A'q#I>j`  
file://swap TD1 [  
SortUtil.swap(data,pivotIndex,j); i5Zk_-\#H  
C~nzH,5  
int k=partition(data,i-1,j,data[j]); ^B(V4-|  
SortUtil.swap(data,k,j); !/}O>v~o  
if((k-i)>1) quickSort(data,i,k-1); =Z P%mW&;}  
if((j-k)>1) quickSort(data,k+1,j); WM| dKF  
|uqf:V`z:  
} #w,Dwy  
/** 7ePqmB<.  
* @param data 0vEoGgY0*:  
* @param i q*\x0"mS/  
* @param j p<TpK )  
* @return ?]Pmxp H}  
*/ CN#+U,NZV  
private int partition(int[] data, int l, int r,int pivot) { lsNrAA%m  
do{ ;3d"wW]}7K  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); FME3sa$  
SortUtil.swap(data,l,r); a:"Uh**  
} ^* J2'X38I  
while(l SortUtil.swap(data,l,r); S0~2{ G"v  
return l; =U#dJ^4P  
} CK,7^U  
#JgH}|&a$  
} W%T>SpFl  
73V|6tmgY  
改进后的快速排序: q}~3C1  
?&|5=>u2}$  
package org.rut.util.algorithm.support; *+j* {>E  
dRj|g  
import org.rut.util.algorithm.SortUtil; LV\DBDM  
GB>QK  
/** rs,2rSsg!  
* @author treeroot +V m}E0Ov  
* @since 2006-2-2 2q3+0Et8  
* @version 1.0 )Y2{_ bx4"  
*/ Gnfd;. (.  
public class ImprovedQuickSort implements SortUtil.Sort { 4US"hexE<  
S{;sUGcu  
private static int MAX_STACK_SIZE=4096; 5jd,{<  
private static int THRESHOLD=10; 4a'N>eDR  
/* (non-Javadoc) r<K(jG[:{f  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GliwY_  
*/ k.uMp<)D  
public void sort(int[] data) { zaah^.MA|  
int[] stack=new int[MAX_STACK_SIZE]; MYla OT  
^Wc@oa`  
int top=-1; 0Uo\wyd  
int pivot; J 4Nln  
int pivotIndex,l,r; AWP"b?^G|  
]|MEx{BG-  
stack[++top]=0; .Xce9C0SW  
stack[++top]=data.length-1; ( M7pT  
x|mqL-Q f  
while(top>0){ <_3b1VhZ  
int j=stack[top--]; |&FkksNAl\  
int i=stack[top--]; ]}U*_rM:  
JsDpy{q  
pivotIndex=(i+j)/2; W#KpPDgZE  
pivot=data[pivotIndex]; `Jzp Sw  
@&X|5p"[g  
SortUtil.swap(data,pivotIndex,j); -7S g62THS  
g=QDu7Ux  
file://partition  c|M6 <}  
l=i-1; UD8op]>L  
r=j; xZ6~Ma 2z  
do{ vH#huZA?7  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); g=;%  
SortUtil.swap(data,l,r); |2abmuR0  
} ?,& tNP{jq  
while(l SortUtil.swap(data,l,r); kL$!E9  
SortUtil.swap(data,l,j); B?4boF?~  
xL{a  
if((l-i)>THRESHOLD){ >N]7IU[-  
stack[++top]=i; yp$_/p O=2  
stack[++top]=l-1; xn5l0'2  
} pgOQIzu  
if((j-l)>THRESHOLD){ KO]T<R h<  
stack[++top]=l+1; 73xAG1D$r  
stack[++top]=j; G*-b}f  
} So0f)`A  
kdl:Wt*4o  
} SzjkI+-$:  
file://new InsertSort().sort(data); p4'G$]#  
insertSort(data); %@.v2 cT  
} kg'o&^/=  
/** {vuZ{I Ja  
* @param data ;j^H)."A\  
*/ cUvz2TK  
private void insertSort(int[] data) { .ox8*OO<  
int temp; %d?cP}V  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 13@|w1/Z  
} cUA7#1\T=  
} 89o/F+_b  
} Z@3i$8  
ynE)Xdh  
} kP-3"ACG  
7PtN?;rP  
归并排序: ^R# E:3e  
I~ok4L?VB  
package org.rut.util.algorithm.support; 3+@<lVew6  
tD+9kf2  
import org.rut.util.algorithm.SortUtil; UazP6^{L  
jV4\A  
/** :E:38q,hG  
* @author treeroot (H ->IV  
* @since 2006-2-2 PK0%g$0  
* @version 1.0 Ib+Y~ XYR  
*/ y#q?A,C@n  
public class MergeSort implements SortUtil.Sort{ b)=[1g/=L  
Kjs.L!W  
/* (non-Javadoc) MM (xk  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dvt9u9Vg=  
*/ T`5bZu^c  
public void sort(int[] data) { -( f)6a+H  
int[] temp=new int[data.length]; MP!d4  
mergeSort(data,temp,0,data.length-1); PX<J&rx  
} a=hxJ1O  
~])t 6i  
private void mergeSort(int[] data,int[] temp,int l,int r){ @Ub"5Fl4  
int mid=(l+r)/2; 8 0Gn%1A9  
if(l==r) return ; g7O qX \  
mergeSort(data,temp,l,mid); g K[YQXfTy  
mergeSort(data,temp,mid+1,r); @te!Jgu{  
for(int i=l;i<=r;i++){ .=X}cJ]`[  
temp=data; uf&myV7  
} +\F'iAs@  
int i1=l; A^)?Wt%*  
int i2=mid+1; 4cl\^yD  
for(int cur=l;cur<=r;cur++){ A29gz:F(  
if(i1==mid+1) |j#C|V%kV  
data[cur]=temp[i2++]; 1 D<_N  
else if(i2>r) J"=vE=  
data[cur]=temp[i1++]; ^yyC [Mz  
else if(temp[i1] data[cur]=temp[i1++]; wtH? [>S;)  
else (2:/8\_P  
data[cur]=temp[i2++]; UN]f"k&  
} /.Ww6a~  
} r[lF<2&*R  
Y#u}tE d  
} %<an9WMF  
*Df,Ijh$  
改进后的归并排序: \E% 'Y  
E ,|xJjh  
package org.rut.util.algorithm.support; dIRm q+d^  
Qj.l:9%  
import org.rut.util.algorithm.SortUtil; 4KH45|; 3  
5[* qi?w=  
/** _Jme!Oaa  
* @author treeroot }Rz3<eON  
* @since 2006-2-2 eC[$B99\  
* @version 1.0 kH]yl 2  
*/ fO0XA"=  
public class ImprovedMergeSort implements SortUtil.Sort { +eFFSt  
y5do1Z  
private static final int THRESHOLD = 10; n~A%q,DmF  
^OstR`U3  
/* K)Q]a30  
* (non-Javadoc) <xgTS[k  
* PzA|t;*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DjN|Wr)*  
*/ ;K!]4tfJ  
public void sort(int[] data) { X_$Cb<e  
int[] temp=new int[data.length]; +YqZ ((  
mergeSort(data,temp,0,data.length-1); $CY't'6Hn  
} -5I2ga  
&8]d }-e  
private void mergeSort(int[] data, int[] temp, int l, int r) { X!m9lV<  
int i, j, k; 20Z8HwQi  
int mid = (l + r) / 2; \9/ b!A  
if (l == r) Lz:(6`S  
return; { Fawt:  
if ((mid - l) >= THRESHOLD) ,)iKH]lY=  
mergeSort(data, temp, l, mid); $aN&nhoO<  
else \>7^f 3m  
insertSort(data, l, mid - l + 1); {|1Y:&M?   
if ((r - mid) > THRESHOLD) .8y3O]  
mergeSort(data, temp, mid + 1, r); F@<CsgKB-  
else ad:&$  
insertSort(data, mid + 1, r - mid); h\PHK C2  
J,AR5@)1  
for (i = l; i <= mid; i++) { _c, '>aH=  
temp = data; +=.W<b  
} `.x Fiyc  
for (j = 1; j <= r - mid; j++) { A@sZ14+f  
temp[r - j + 1] = data[j + mid]; |m80]@>  
} XI9js{p  
int a = temp[l]; uwjGDw  
int b = temp[r]; `kU/NKq  
for (i = l, j = r, k = l; k <= r; k++) { \U[ {z&]~  
if (a < b) { =9"W@n[>W  
data[k] = temp[i++]; IaT$ 6\>  
a = temp; sfOHarww  
} else { D;_ MPN[  
data[k] = temp[j--]; G=A,9@+c  
b = temp[j]; aEWWFN  
} 4( 1(e  
} ;~\MZYs3m  
} [&nh5 |f  
DBCK2PlJ  
/** S p^9& ^  
* @param data t| 'N+-T3  
* @param l `$B3X  
* @param i :@!ic<p  
*/ l?Fb ='#  
private void insertSort(int[] data, int start, int len) { @ )-$kk*  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y^}6!>Ou:  
} ^ 8@Iyh  
} |'{zri|A"  
} aMvI?y {  
} 7 <Q5;J&;  
)I$q5%q8  
堆排序: W~p/,HcM  
ijdXU8  
package org.rut.util.algorithm.support; HfvTxaK  
e`v`XSA[p  
import org.rut.util.algorithm.SortUtil; @$2))g`  
%o:2^5\W  
/** I<8sI%,s  
* @author treeroot %LZ({\5K#f  
* @since 2006-2-2 a\:VREKj,  
* @version 1.0 kJ-*fe'S  
*/ aBw2f[mo  
public class HeapSort implements SortUtil.Sort{ * C6a?]  
i![dPM  
/* (non-Javadoc) [g Z"a*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ty*@7g0k  
*/ }-o{ASC#  
public void sort(int[] data) { y:h}z).  
MaxHeap h=new MaxHeap(); vJU*>U,  
h.init(data); 6^c>,.R  
for(int i=0;i h.remove(); ^+m+zd_  
System.arraycopy(h.queue,1,data,0,data.length); i6 (a@KRY  
} ZU9c 5/J  
OKvPL=~  
private static class MaxHeap{ S:x?6IDPC^  
V]vc(rH  
void init(int[] data){ F`9ZH.  
this.queue=new int[data.length+1]; jvV9eA:zl  
for(int i=0;i queue[++size]=data; zKsz*xv6b  
fixUp(size); v !FMs<  
} {s_+?<l  
} 8-Hsgf.*  
)"m!YuS Y  
private int size=0; l $jxLZ  
m~D&gGFt  
private int[] queue; nYt/U\n!  
a /:@"&Y  
public int get() { bgK<pi)d  
return queue[1]; |-CnT:|o  
} "/nNM{^  
!E-Pa5s  
public void remove() { 3^Q]j^e4Ny  
SortUtil.swap(queue,1,size--); ^+1#[E  
fixDown(1); Q26qNn bK  
} LT,?$I  
file://fixdown F1Hh7 F  
private void fixDown(int k) { N?m0US u*  
int j; if]Noe  
while ((j = k << 1) <= size) { PT5AA8F  
if (j < size %26amp;%26amp; queue[j] j++; 60)iw4<wf  
if (queue[k]>queue[j]) file://不用交换  =Mb1o[  
break; (}5S  
SortUtil.swap(queue,j,k); h#hxOVl%x  
k = j; 5 XA=G  
} I6s3+x;O  
} | /|  
private void fixUp(int k) { 7oR:1DX w|  
while (k > 1) { ) 9oH,gZ  
int j = k >> 1; )#}mH@  
if (queue[j]>queue[k]) KPpHwcYxT  
break; G5,~Z&}YS  
SortUtil.swap(queue,j,k); )|I5j];L  
k = j; wfP5@!I  
} "sKa`WN}  
} <uc1D/~^:  
2EK%N'H  
} $ A9%UhV  
f(eQ+0D  
} pMJ1v  
.y&QqxiE  
SortUtil: \G2B?>E;  
P@]8pIB0d^  
package org.rut.util.algorithm; wCHR7X0*b  
033T>qY  
import org.rut.util.algorithm.support.BubbleSort; Jy aag-  
import org.rut.util.algorithm.support.HeapSort; x+@&(NMP5  
import org.rut.util.algorithm.support.ImprovedMergeSort; `+/H^  
import org.rut.util.algorithm.support.ImprovedQuickSort; wO>L#"X^v  
import org.rut.util.algorithm.support.InsertSort; :SsUdIX;P  
import org.rut.util.algorithm.support.MergeSort; 7E @+  
import org.rut.util.algorithm.support.QuickSort; 4A3nO<o MF  
import org.rut.util.algorithm.support.SelectionSort; kpI{KISQu  
import org.rut.util.algorithm.support.ShellSort; \M"UmSB o  
4W#E`9 6u  
/** D)brPMS:o  
* @author treeroot m"9XT)N  
* @since 2006-2-2 WpLZQ6wH  
* @version 1.0 [,aqQ6S  
*/ JNFIT;L  
public class SortUtil { 1,V`8 [  
public final static int INSERT = 1; S',9g4(5  
public final static int BUBBLE = 2; K"V:<a  
public final static int SELECTION = 3; aRc'  
public final static int SHELL = 4; }N*>QR5K  
public final static int QUICK = 5; L@^~N$G&u  
public final static int IMPROVED_QUICK = 6; =ORf%f5"'  
public final static int MERGE = 7; "|m|E/Z-9  
public final static int IMPROVED_MERGE = 8; ZCg`z  
public final static int HEAP = 9; o_Si mJFK  
?K@t0a   
public static void sort(int[] data) { I=Oy-  
sort(data, IMPROVED_QUICK); poJg"R4  
} 1KYN>s:  
private static String[] name={ a? R[J==  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q8MS,7y/  
}; m4[g6pNx~  
?'r9"M>  
private static Sort[] impl=new Sort[]{ 'lS `s(  
new InsertSort(), n tP|\E  
new BubbleSort(), - ~4+w  
new SelectionSort(), SjdZyJa  
new ShellSort(), F.)!3YE  
new QuickSort(), d3]hyTqbtm  
new ImprovedQuickSort(), 4q$H  
new MergeSort(), ]/T -t1D  
new ImprovedMergeSort(), XW L^  
new HeapSort() SLhEc  
}; !D o,>gO  
B/"2.,  
public static String toString(int algorithm){ _iE j  
return name[algorithm-1]; gq5qRi`q  
} @+_&Y]  
y)F!c29  
public static void sort(int[] data, int algorithm) { = c~I .  
impl[algorithm-1].sort(data); o;[bJ Z\^x  
} [k]|Qi nk  
nVD Xj  
public static interface Sort { Yn9j-`  
public void sort(int[] data); A.Bk/N1G  
} IwpbfZ  
Qeb}!k2A  
public static void swap(int[] data, int i, int j) { $gMCR b,  
int temp = data; %So] 3;'  
data = data[j]; P=H+ #  
data[j] = temp; o7+>G~i  
} j K8'T_Pah  
} P.sgRsL  
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