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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。 A4#F AFy  
插入排序: U{[YCs fk  
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package org.rut.util.algorithm.support; <?!'  
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import org.rut.util.algorithm.SortUtil; i(cKg&+ktd  
/** VzHrKI  
* @author treeroot C3f\E: D)  
* @since 2006-2-2 6hYz^}2g  
* @version 1.0 Xa?igbgAwx  
*/ em0Y'J  
public class InsertSort implements SortUtil.Sort{ kAPSVTH$v  
?{`7W>G  
/* (non-Javadoc) A]i!131{w|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V!^0E.?a  
*/ ."B{U_P&  
public void sort(int[] data) { SN L-6]j  
int temp; 2; ,8 u  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); &}2@pu[S?7  
} >,3uu}s  
} to&,d`k=-  
} {!qnHv\S  
~;Y Tz  
} X _@|+d  
$HQ4o\~  
冒泡排序: Ny/eYF#  
v3M$UiN,:  
package org.rut.util.algorithm.support; rQ]JM  
F4z#u2~TC  
import org.rut.util.algorithm.SortUtil; Vym0|cW  
vBF9!6X.  
/** e_KfnPY   
* @author treeroot T7.SjR6X>  
* @since 2006-2-2 ug ;Xoh5w  
* @version 1.0 0^u Ut-  
*/ ysIhUpd  
public class BubbleSort implements SortUtil.Sort{ aHpZhR| f$  
ZBY2,%nAo  
/* (non-Javadoc) +>!nqp  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \$Wpt#V  
*/ '=Lpch2J  
public void sort(int[] data) { U 887@-!3  
int temp; 'xkl|P>=],  
for(int i=0;i for(int j=data.length-1;j>i;j--){ 3Z*o5@RI  
if(data[j] SortUtil.swap(data,j,j-1); {CBb^BP  
} =dKjTBR S'  
} <anKw|  
} "H`Be  
} _~\ } fY  
Is }kCf  
} &b5(Su  
0^o/c SF  
选择排序: jED.0,+K !  
u|Mx}  
package org.rut.util.algorithm.support; +D]raU  
[{u3g4`}  
import org.rut.util.algorithm.SortUtil; v7./u4S|V  
LFHJj-nk  
/** t4v'X}7q]  
* @author treeroot Q#SQ@oUzD  
* @since 2006-2-2 v=lW5%r,'  
* @version 1.0 !1=OaOT  
*/ 6V JudNA  
public class SelectionSort implements SortUtil.Sort { $'Mf$h  
JRFUNy1+e1  
/* ^ `Ozw^~  
* (non-Javadoc) !^su=c  
* GVnDN~[  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0]c&K  
*/ Qm[s"pM  
public void sort(int[] data) { q: FhuOP  
int temp; ztSQrDbbb4  
for (int i = 0; i < data.length; i++) { (M$>*O3SR  
int lowIndex = i; HV/:OCK  
for (int j = data.length - 1; j > i; j--) { ^OWG9`p+  
if (data[j] < data[lowIndex]) { h`1<+1J9  
lowIndex = j; Fl=H5HR  
} U[?_|=~7  
} h^tCF=S  
SortUtil.swap(data,i,lowIndex); DWKQ>X6  
} *1`X}  
} b1 w@toc  
.aY $-Y<  
} !KK`+ 9/  
c5WMN.z  
Shell排序: pl&nr7\  
Uz!3){E  
package org.rut.util.algorithm.support; Jk\-e`eE  
#d\&6'O  
import org.rut.util.algorithm.SortUtil; H@xS<=:lM  
3_XLx{["'  
/** HBE[q#  
* @author treeroot "*t6KXVaM  
* @since 2006-2-2 A[;deHg=  
* @version 1.0  MYy58N  
*/ N?vb^?  
public class ShellSort implements SortUtil.Sort{ 5<ruN11G  
k B]`py!  
/* (non-Javadoc) Y#68_%[  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?c RF;!o"  
*/ /ie&uW y  
public void sort(int[] data) { Ei@  
for(int i=data.length/2;i>2;i/=2){ \/3(>g?4  
for(int j=0;j insertSort(data,j,i); 5>f"  
} [%dsq`b#  
} fS4W*P[B3  
insertSort(data,0,1); ktTP~7UVi  
} aHW34e@ebL  
zs#-E_^%M  
/** e3;D1@  
* @param data \Yr*x7!  
* @param j xo'!$a}I2  
* @param i |@JTSz*Or  
*/ { %X2K  
private void insertSort(int[] data, int start, int inc) { lF!PiL  
int temp; @s-P!uCaT  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); "V]*ov&[  
} zT,@PIC(  
} WC~;t4  
} *2a"2o  
l6HtZ(  
} tf6m .  
4}; @QFT*  
快速排序: (cLKhn@  
VR>!Ch  
package org.rut.util.algorithm.support; C+s/KA%  
X#$ oV#  
import org.rut.util.algorithm.SortUtil; %(eQ1ir+  
=figat  
/** G`0O5G:1  
* @author treeroot K.}jOm  
* @since 2006-2-2 ?Cf'IBpN  
* @version 1.0 mgx|5Otg  
*/ ~+4lmslR  
public class QuickSort implements SortUtil.Sort{ Y`ip. Nx  
Bzwll  
/* (non-Javadoc) \T_ZcV  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f~mwDkf?L  
*/ m6e(Xk,)  
public void sort(int[] data) { :P_h_Tizv  
quickSort(data,0,data.length-1); Ln,<|,fZN  
} X^eyrqv  
private void quickSort(int[] data,int i,int j){ _r3Y$^!U  
int pivotIndex=(i+j)/2; 2v ~8fr4  
file://swap !FP ]  
SortUtil.swap(data,pivotIndex,j); /r~2KZE  
<pb  
int k=partition(data,i-1,j,data[j]); _D4qnb@  
SortUtil.swap(data,k,j); mnM]@8^G  
if((k-i)>1) quickSort(data,i,k-1); )?[7}(4jI  
if((j-k)>1) quickSort(data,k+1,j); j? BL8E'   
Q*#Lr4cm{  
} [m:cO6DM,  
/** _1gNU]"  
* @param data _ $>);qIP4  
* @param i #h=V@Dh  
* @param j HU?1>}4L  
* @return 1M??@@X  
*/ G)< B7-72;  
private int partition(int[] data, int l, int r,int pivot) { )4uWB2ZRoi  
do{ h7E?7nR  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); SnFyK5  
SortUtil.swap(data,l,r); ZiuD0#"!  
} C%yH}T\s  
while(l SortUtil.swap(data,l,r); o4FHR+u<M  
return l; ,byc!P  
} <<d#  
AQjv? 4)T  
} wGLMLbj5  
<T[LugI  
改进后的快速排序: a.%ps:  
6NV592  
package org.rut.util.algorithm.support; 3 twA5)v  
zS;ruK%2  
import org.rut.util.algorithm.SortUtil; k)>H=?mI  
Ql5bjlQdO  
/** Q.B)?wm  
* @author treeroot NHyUHFY  
* @since 2006-2-2 Jp"29 )w  
* @version 1.0 Z]b;%:>=  
*/ J(#6Cld`c  
public class ImprovedQuickSort implements SortUtil.Sort { G;cC!x<  
h623)C;  
private static int MAX_STACK_SIZE=4096; MS""-zn<  
private static int THRESHOLD=10; %^lD  
/* (non-Javadoc) tdRvg7v,N%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L3I$ K+c  
*/ %l&oRBC  
public void sort(int[] data) { k5-4^  
int[] stack=new int[MAX_STACK_SIZE]; JR `$t~0t  
xwD`R *  
int top=-1; >|%3j,<U  
int pivot; [6l0|Y  
int pivotIndex,l,r; F;#$Q  
Gz{%Z$A~o  
stack[++top]=0; kB@gy}  
stack[++top]=data.length-1; _0Ea 3K  
O)&W0` VY  
while(top>0){ l GYW[0dy  
int j=stack[top--]; ddN(L`nd  
int i=stack[top--]; eoww N>-2C  
Tfh2>  
pivotIndex=(i+j)/2; 7#j.y f4  
pivot=data[pivotIndex]; 7 w,D2T  
bh5D}w  
SortUtil.swap(data,pivotIndex,j); X9?)P5h=  
}d}sC\>U  
file://partition %N&.B  
l=i-1; [#Apd1S_  
r=j; ,TWlg  
do{ Rnwm6nu  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); '-A;B.GV%  
SortUtil.swap(data,l,r); {?lndBP<  
} W6>t!1oO+  
while(l SortUtil.swap(data,l,r); \ejHM}w3,  
SortUtil.swap(data,l,j); n yPeN?-  
rGNa[1{kRs  
if((l-i)>THRESHOLD){ 0e0)1;t\  
stack[++top]=i; H'#06zP>5  
stack[++top]=l-1; h9 DUS,G9,  
} {K+f& 75  
if((j-l)>THRESHOLD){ %]7 6u7b/  
stack[++top]=l+1; K!\v ?WbF  
stack[++top]=j; FW8Zpr!u  
} 8?LT*>!  
2Pm}wD^`  
} TsT5BC63  
file://new InsertSort().sort(data); 1LS1 ZY  
insertSort(data); f$^wu~  
} qZF&^pCF}  
/** b%MZfaU  
* @param data /v9qrZ$$  
*/ R /" f  
private void insertSort(int[] data) { RgV3,z  
int temp; bj@sci(1?  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ^X{U7?x  
} `>UUdv{C  
} >z%YKdq  
} BhDg\oxZ  
+0U=UV)U  
} s1wlOy  
d@ 8M_ O |  
归并排序: :AlvWf$d  
)e5=<'f 1  
package org.rut.util.algorithm.support; nG4ZOx.*1g  
mWZP.w^-  
import org.rut.util.algorithm.SortUtil; 'i$. _Tx  
gk| % 4.  
/** !`N:.+DT  
* @author treeroot pnSKIn  
* @since 2006-2-2 ZMlBd}H  
* @version 1.0 ;SI (5rS?  
*/ swZi O_85  
public class MergeSort implements SortUtil.Sort{ ^k7I+A  
) ??N]V_U  
/* (non-Javadoc) ;MNUT,U  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c! kr BS  
*/ fx+_;y  
public void sort(int[] data) { KF#^MEw%  
int[] temp=new int[data.length]; I1m[M?  
mergeSort(data,temp,0,data.length-1); @P~%4:!Hr  
} ?&9=f\/P  
Pa0W|q#?X  
private void mergeSort(int[] data,int[] temp,int l,int r){ >ye.rRZd`  
int mid=(l+r)/2; M`K]g&57hL  
if(l==r) return ; mW!n%f  
mergeSort(data,temp,l,mid); <eMqg u  
mergeSort(data,temp,mid+1,r); l4i 51S"  
for(int i=l;i<=r;i++){ !;8Y?c-D  
temp=data; 'cc8 xC  
} $"NH{%95}  
int i1=l; hfI=9x/  
int i2=mid+1; d #1& "(   
for(int cur=l;cur<=r;cur++){ >)C7IQ/  
if(i1==mid+1) PcA^ jBgGl  
data[cur]=temp[i2++]; 9d|8c > I  
else if(i2>r) 8/j|=Q,5  
data[cur]=temp[i1++]; ` Ny(S2  
else if(temp[i1] data[cur]=temp[i1++]; ^@8XJ[C,_  
else `},:dDHI  
data[cur]=temp[i2++]; :k ?`gm$  
} ;/kd.Q  
} @k;65'"Q  
VD&wO'U  
} @yb'h`f]  
OKm,iIp]  
改进后的归并排序: ?bM%#x{e  
)jl@ hnA  
package org.rut.util.algorithm.support; : 8>zo  
bC+Z R{M  
import org.rut.util.algorithm.SortUtil; |~%RSS~b*  
E8Kk )7  
/** y "+'4:_  
* @author treeroot j;uUM6  
* @since 2006-2-2 > "rM\ Q  
* @version 1.0 @mZK[*Ak<*  
*/ nI?*[y}  
public class ImprovedMergeSort implements SortUtil.Sort { @d{}M)6\!  
$!. [R}  
private static final int THRESHOLD = 10; r4[=pfe25  
1lIs jBo g  
/* K_Y{50#  
* (non-Javadoc) X%s5D&gr  
* &Qda|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]\K?%z  
*/ l=9D!6 4  
public void sort(int[] data) { tH;9"z# ~  
int[] temp=new int[data.length]; <2@t ~ 9  
mergeSort(data,temp,0,data.length-1); 6R^F^<<  
} l-W)? d  
9~j"6wS  
private void mergeSort(int[] data, int[] temp, int l, int r) { i_m& qy<v  
int i, j, k; V0m1>{  
int mid = (l + r) / 2; M:OZWYQ  
if (l == r) <-N eusx%  
return; xib}E[-l#  
if ((mid - l) >= THRESHOLD) p' ^}J$  
mergeSort(data, temp, l, mid); yB7si(,1>  
else =%I[o=6  
insertSort(data, l, mid - l + 1);  U%r{{Q1  
if ((r - mid) > THRESHOLD) 2X' H^t]7  
mergeSort(data, temp, mid + 1, r); )M Iw/  
else HLz<C  
insertSort(data, mid + 1, r - mid); ha|2u(4  
X~m57 b j  
for (i = l; i <= mid; i++) { :CM-I_6  
temp = data; p&Nav,9x  
} +&"W:Le:  
for (j = 1; j <= r - mid; j++) { &u|t{C#0  
temp[r - j + 1] = data[j + mid]; = .S2gO >  
} 2u_=i$xW  
int a = temp[l]; gYbvCs8O!  
int b = temp[r]; wT+60X'  
for (i = l, j = r, k = l; k <= r; k++) { YhglL!p C  
if (a < b) { l2W+VBn6  
data[k] = temp[i++]; }` `oojz  
a = temp; OO/>}? ob  
} else { zx "EAF{  
data[k] = temp[j--]; Bi fI.2|  
b = temp[j]; D_<B^3w )  
} JfJ ln[  
} +1qvT_  
} 'p[6K'Uq5  
PJKY$s.  
/** *vBhd2HO  
* @param data o|n;{zT"  
* @param l J%ws-A?6rN  
* @param i H h](n<Bs  
*/ kKbbsB  
private void insertSort(int[] data, int start, int len) { H4v%$R;K  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `4@` G:6BL  
} :, H_ e! X  
} .Sw4{m[g  
} </<z7V,{  
} n@@tO#!\  
tZ=|1lM  
堆排序: /Tl ybSC1  
)N{PWSPs  
package org.rut.util.algorithm.support; O+XQP!T  
HWoMzp5="3  
import org.rut.util.algorithm.SortUtil; &flcJ`  
~O./A-l  
/** M[b~5L+S  
* @author treeroot (1{OQ0N+x  
* @since 2006-2-2 A+Je?3/.  
* @version 1.0 ocW`sE?EED  
*/ 9|>y[i  
public class HeapSort implements SortUtil.Sort{ ,9=P=JH  
=fBr2%qK  
/* (non-Javadoc) ,t1s#*j\!q  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3S^Qo9S  
*/ YA8/TFu<_  
public void sort(int[] data) { Tz& cm =  
MaxHeap h=new MaxHeap(); BI#(L={5  
h.init(data); ?b^<Tny  
for(int i=0;i h.remove(); `,GFiTPd  
System.arraycopy(h.queue,1,data,0,data.length); K24y;968  
} Q4ii25]*  
IP !zg|c,  
private static class MaxHeap{ IMSm  
QKz2ONV=)  
void init(int[] data){ Q(8W5Fb?  
this.queue=new int[data.length+1]; c$A}mL_  
for(int i=0;i queue[++size]=data; e!i.u'z  
fixUp(size); =|-xj h  
} F+xMXBD@>*  
} bg4VHT7?>)  
jAt6 5a  
private int size=0; `b@"GOr  
5hCfi  
private int[] queue; mn<ea&  
*LmzGF|  
public int get() { U_B`SS  
return queue[1]; A^c5CJ_  
} ; zy;M5l5.  
_x#r,1V+D  
public void remove() { b[;3y/X  
SortUtil.swap(queue,1,size--); dj0D u^ v4  
fixDown(1); t.O4-+$ig  
} \BsvUGd  
file://fixdown WWTJ%Rd|  
private void fixDown(int k) { yNx"Ey dk`  
int j; XnvaT(k7Y  
while ((j = k << 1) <= size) { 8{Svax(  
if (j < size %26amp;%26amp; queue[j] j++; I#p-P)Q%S  
if (queue[k]>queue[j]) file://不用交换 )./'RE+(k  
break; A,ao2)  
SortUtil.swap(queue,j,k); Q([g1?F9*  
k = j; QPF[D7\  
} |4Q><6"G  
} ',RR*{I  
private void fixUp(int k) { +n`^W(  
while (k > 1) { yFP#z5G  
int j = k >> 1; .Qj`_q6=  
if (queue[j]>queue[k]) 0Zl1(;hx@  
break; i%B$p0U<  
SortUtil.swap(queue,j,k); tQ?}x#J  
k = j; e''Wm.>g(+  
} ':]w  
} w@f_TG"Vt  
zjJyc?  
} WUi7~Ei}  
aR;Q^YJ+a  
} ?at~il$z'  
PsD]gN5"  
SortUtil: sAc)X!}  
0P53dF  
package org.rut.util.algorithm; BQ&h&57K  
/L[:C=u  
import org.rut.util.algorithm.support.BubbleSort; }`^<ZNkb/  
import org.rut.util.algorithm.support.HeapSort; `}Hnj*  
import org.rut.util.algorithm.support.ImprovedMergeSort; 1$2Rs-J  
import org.rut.util.algorithm.support.ImprovedQuickSort; kQBVx8Uq]  
import org.rut.util.algorithm.support.InsertSort; <~8W>Y\m  
import org.rut.util.algorithm.support.MergeSort; tv|=`~Y  
import org.rut.util.algorithm.support.QuickSort; )ZmE"  
import org.rut.util.algorithm.support.SelectionSort; +V\NMW4d  
import org.rut.util.algorithm.support.ShellSort; )'<zC  
bm7$DKp#  
/** r*3XM{bZ/@  
* @author treeroot 'XQv>J  
* @since 2006-2-2 DwTZ<H4  
* @version 1.0 p-/x Md  
*/ pV-.r-P  
public class SortUtil { q C|re!K  
public final static int INSERT = 1; aA yFu_  
public final static int BUBBLE = 2; ->#7_W  
public final static int SELECTION = 3; T@ HozZ  
public final static int SHELL = 4; n:!J3pR  
public final static int QUICK = 5; I2l'y8)d  
public final static int IMPROVED_QUICK = 6; a+BA~|u^  
public final static int MERGE = 7; Em.?  
public final static int IMPROVED_MERGE = 8; W]*wxzf!5z  
public final static int HEAP = 9; & ='uAw  
da^9Fb  
public static void sort(int[] data) { ta 4<d)nB  
sort(data, IMPROVED_QUICK); Vis?cuU/  
} E0h!%/+-L  
private static String[] name={ kI;^V  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bo"I:)n;  
}; Tp6ysjao  
},L[bDOV07  
private static Sort[] impl=new Sort[]{ f!I e  
new InsertSort(), r#~6FpFVK^  
new BubbleSort(), `4p9K  
new SelectionSort(), BzUx@,  
new ShellSort(), lJ,s}l7  
new QuickSort(), |O+binq  
new ImprovedQuickSort(), \%^3Izsc  
new MergeSort(), 4'8.f5  
new ImprovedMergeSort(), / q!&I  
new HeapSort() @<sP1`1  
}; Z,&ywMm/G  
5LK>n-  
public static String toString(int algorithm){ ]- `{kX  
return name[algorithm-1]; g?+P&FL#I  
} ?{dno=  
+]_} \  
public static void sort(int[] data, int algorithm) { [(K^x?\Y0'  
impl[algorithm-1].sort(data); dk ?0r  
} ,J#5Y.  
x[kdQj2[&  
public static interface Sort { zC^Ib&gm>,  
public void sort(int[] data); g/yXPzLU  
} cK } Qu  
D.GSl  
public static void swap(int[] data, int i, int j) { u!S{[7 FY  
int temp = data; A| +{x4s`  
data = data[j]; 8YJ({ Ou_  
data[j] = temp; Y#5S;?bR  
} ]_,~q@r$  
} +$'/!vN  
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