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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。 k}:;`ST  
插入排序: F)~>4>hPr  
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package org.rut.util.algorithm.support; i ZPNss  
cEa8l~GC<  
import org.rut.util.algorithm.SortUtil; 0V-jOc  
/** Ag2~q  
* @author treeroot m7i_ Iv  
* @since 2006-2-2 h._eP.W`  
* @version 1.0 "0%K3d+  
*/ tXA?[ S  
public class InsertSort implements SortUtil.Sort{ d1_kw A2y  
7~J>Ga  
/* (non-Javadoc) s:l H4B  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rZwSo]gp  
*/ 3r#['UmT  
public void sort(int[] data) { muXP5MO  
int temp; rD21:1s  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ? ch?q~e)  
} BegO\0%+  
} EGI$=Y  
} s@$0!8sxm  
z\<,}x}V  
} xO:h[  
C.ynOo,W  
冒泡排序: 3| w$gG;Y  
>Z*b0j  
package org.rut.util.algorithm.support; G~C-tAB  
/-!Fr:Ox>  
import org.rut.util.algorithm.SortUtil; evZP*N~G  
xU%]G .k  
/** W=EcbH9/.)  
* @author treeroot 7L/LlO/  
* @since 2006-2-2 DjaXJ?'  
* @version 1.0 075IW"p'  
*/ Y*pXbztP  
public class BubbleSort implements SortUtil.Sort{ 2hNl_P~z1u  
I 2AQ G  
/* (non-Javadoc) +C;;4s)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i[LnU#+  
*/ c}$>UhLe  
public void sort(int[] data) { ,F->*=  
int temp; 837:;<T  
for(int i=0;i for(int j=data.length-1;j>i;j--){ sF)$<[w  
if(data[j] SortUtil.swap(data,j,j-1); !nL94:8U  
} <t!0{FJ  
} q]f7D\ M  
} }\H. G  
} |O)ZjLx  
~X2 # z |  
}  *`qI<]!  
X ]&`"Z]  
选择排序: 2\.23  
h*KDZ+{)  
package org.rut.util.algorithm.support; 8?m=Vw<kIZ  
nTsV>lQY,  
import org.rut.util.algorithm.SortUtil; f#AuZ]h  
cahlYv'  
/** i@P= *lLD  
* @author treeroot GCQOjqiR  
* @since 2006-2-2 jJYCGK$=  
* @version 1.0 N1g;e?T ':  
*/ ;7E"@b,tPN  
public class SelectionSort implements SortUtil.Sort { v@2?X4n  
&q4~WRnzJk  
/* Qu<HeSA_  
* (non-Javadoc) d72( g$F  
* 0V8G9Gj  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c uAp,!  
*/ OmK0-fa/  
public void sort(int[] data) { GRL42xp'*D  
int temp; b)XGr?  
for (int i = 0; i < data.length; i++) { R(y`dQy<K  
int lowIndex = i; b!SIs*  
for (int j = data.length - 1; j > i; j--) { Y8s-cc(  
if (data[j] < data[lowIndex]) { jMR9E@>~E  
lowIndex = j; Z^mIGy}  
} +&X>ul  
} )"P.n-aF  
SortUtil.swap(data,i,lowIndex); 7~MWp4.   
} U!"RfRD.<  
} ;SA+| ,  
'@hnqcqXq  
} [daR)C  
aeLIs SEx  
Shell排序: Oh`Pf;.z%  
;''S} ;  
package org.rut.util.algorithm.support; zS?}3#g0u  
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import org.rut.util.algorithm.SortUtil; pek5P4W_  
eBECY(QMQ  
/** u*Y!=IT  
* @author treeroot %HZ!s `w_  
* @since 2006-2-2 #eI` l`}  
* @version 1.0 l_q1h]/   
*/ %s%e5hU  
public class ShellSort implements SortUtil.Sort{ h2]G V-  
rPW 9lG  
/* (non-Javadoc) OHF:E44k  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '_=XfTF  
*/ =)6|lz^  
public void sort(int[] data) { vs.}Bou]  
for(int i=data.length/2;i>2;i/=2){ T:j!a{_|  
for(int j=0;j insertSort(data,j,i); rlDJHR6  
} ? v@q&  
} /z,+W9`  
insertSort(data,0,1); 3o__tU)B  
} 2-wvL&pi)  
w\.z-6G  
/** U./1OZ&  
* @param data Cd'SPaR  
* @param j .3,Ow(3l  
* @param i f['pHR%l2$  
*/ u"r1RG'  
private void insertSort(int[] data, int start, int inc) { P\|i<Ds_M  
int temp; Op<|Oz$Q|l  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); J 9k~cz  
} T/l2B1  
} .l&<-l;UQ  
} W r;?t!  
EabZ7zFoN  
} o[eIwGxZ  
%8GY`T:^  
快速排序: ]+0I8eerd  
'| |),>~  
package org.rut.util.algorithm.support; B\!.o=<h  
.!J,9PE  
import org.rut.util.algorithm.SortUtil; | [lM2  
lN^} qg><  
/** vN4g#,<  
* @author treeroot @oL<Ioh  
* @since 2006-2-2 2L_ts=  
* @version 1.0 H0B"?81  
*/ rj].bGQ,+  
public class QuickSort implements SortUtil.Sort{ 3$`qy|=zO  
Ot} E  
/* (non-Javadoc) GzUgzj|BN~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =w!14@W  
*/ bP 2IX  
public void sort(int[] data) { _,4f z(  
quickSort(data,0,data.length-1); +H L]t'UEg  
} Z*|qbu)  
private void quickSort(int[] data,int i,int j){ ^CwzA B  
int pivotIndex=(i+j)/2; ,2%>e"%  
file://swap ?qQRA|n*  
SortUtil.swap(data,pivotIndex,j); }0Q6iHX@  
Gx GZxf*(  
int k=partition(data,i-1,j,data[j]); tXTa>Q  
SortUtil.swap(data,k,j); K G~fDb  
if((k-i)>1) quickSort(data,i,k-1); g.N~81A  
if((j-k)>1) quickSort(data,k+1,j); ^kMgjS}R  
YDyi6x,  
} #9Z*.  
/** )S|}de/a2  
* @param data Ui46 p  
* @param i $CVbc%  
* @param j PU^Z7T);  
* @return \~zTc_  
*/ '7{0k{  
private int partition(int[] data, int l, int r,int pivot) { 4+`<'t]Q  
do{ 7oDr`=q1]r  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); @"H+QVJ@  
SortUtil.swap(data,l,r); QO)Q%K,  
} *~|xj,md  
while(l SortUtil.swap(data,l,r); Ng,#d`Br  
return l; ?zNv7Bj  
} lV^sVN Z]  
oM$EQd`7  
} ('xu2 ;<  
%9=^#e+pE  
改进后的快速排序: !\8j[QS!  
1k\1U  
package org.rut.util.algorithm.support; W]n%$a  
gRKmfJ*u  
import org.rut.util.algorithm.SortUtil; UPPDs"  
2ZB'WzH.X  
/** Sg0 _l(  
* @author treeroot 1DGVAIcD  
* @since 2006-2-2 ^Yn{Vi2.  
* @version 1.0 VzMoWD;  
*/ rBkf@  
public class ImprovedQuickSort implements SortUtil.Sort { <Dt,FWWkv'  
rsvZi1N4w$  
private static int MAX_STACK_SIZE=4096; !w98 [BE7  
private static int THRESHOLD=10; >\$qF  
/* (non-Javadoc) `96:Z-!}  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :*6tbUp  
*/ %n9}P , ?  
public void sort(int[] data) { r+>E`GGQ  
int[] stack=new int[MAX_STACK_SIZE]; p(~>u'c  
n4ce)N@  
int top=-1; rGRxofi.  
int pivot; xue-5 '  
int pivotIndex,l,r; F)Yn1&a#H  
RWXj)H)w  
stack[++top]=0; o'%F*>#v  
stack[++top]=data.length-1; 7vcYI#(2 Y  
E[6JHBE*r  
while(top>0){ OsAXHjX}  
int j=stack[top--]; us4.-L  
int i=stack[top--]; `t:7&$>T  
3. Qf^p  
pivotIndex=(i+j)/2; 7|T5N[3?l,  
pivot=data[pivotIndex]; Nj.(iBmr  
KcfW+> W3  
SortUtil.swap(data,pivotIndex,j); .?_wcp=  
B8|=P&L7N  
file://partition V_~}7~ I  
l=i-1; YurK@Tq7  
r=j; #'^p-Jdm  
do{ HHCsWe-  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); + yS"pOT  
SortUtil.swap(data,l,r); p2!x8`IB*  
} I4  Tc&b  
while(l SortUtil.swap(data,l,r); .ymR%X_k  
SortUtil.swap(data,l,j); S]9:3~  
zScV 9,H1  
if((l-i)>THRESHOLD){ cIja^xD  
stack[++top]=i; /zuU  
stack[++top]=l-1; 8:$kFy\A'  
} M$%aX,nk'  
if((j-l)>THRESHOLD){ A]BG*  
stack[++top]=l+1; W8yr06{]  
stack[++top]=j; 1 < <`T%&  
} i{T0[\4  
27t:-O  
} @6 gA4h  
file://new InsertSort().sort(data); 0OEyJ|g  
insertSort(data); #g{ZfO[#  
} # u^FB  
/** ;TMH.E,h:  
* @param data ^%#v AS  
*/ -Qiay/tlu  
private void insertSort(int[] data) { isDBNXV:  
int temp; *FK!^Y  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); x~j%  
} d|j3E  
} GZXUB0W\@)  
} `"zX<  
AJ^9[j}  
} 7,j}]  
'"~|L>F%G  
归并排序: FFR_1Vf  
!ygh`]6V  
package org.rut.util.algorithm.support; w;}P<K  
G0CmY43  
import org.rut.util.algorithm.SortUtil; 9d#-;qV  
RA>xol~xy  
/** i)+@'!6  
* @author treeroot !wJ~p:vRdY  
* @since 2006-2-2 BGLJ>zkq  
* @version 1.0 _;v4 ]MU  
*/ L:XnW 1(Or  
public class MergeSort implements SortUtil.Sort{ c/x ^I{b*  
EXS 1.3>  
/* (non-Javadoc) (gvaYKvr  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E2LpQNvN%g  
*/ ojT TYR{  
public void sort(int[] data) { 2e/ JFhA  
int[] temp=new int[data.length]; -+Kx^V#'R  
mergeSort(data,temp,0,data.length-1); l yF~E  
} ,l&Dt,  
\gDf&I  
private void mergeSort(int[] data,int[] temp,int l,int r){ D;.-e  
int mid=(l+r)/2; 9Fv1D  
if(l==r) return ; (05/}PhB`  
mergeSort(data,temp,l,mid); 8}XtVF;  
mergeSort(data,temp,mid+1,r); a+uSCs[C  
for(int i=l;i<=r;i++){ i`FevAx;[m  
temp=data; g.SFl  
} )0j^Fq5[+  
int i1=l; :+bQPzL  
int i2=mid+1; GXYmJ4wR  
for(int cur=l;cur<=r;cur++){ [ZZ~^U5  
if(i1==mid+1) i`z1if6O  
data[cur]=temp[i2++]; ^Q pP'  
else if(i2>r) PL@hsZty~c  
data[cur]=temp[i1++]; ;;2XLkWu  
else if(temp[i1] data[cur]=temp[i1++]; A Ns.`S  
else K#%L6=t$<  
data[cur]=temp[i2++]; lr=? &>MXj  
} "|{ NRIE  
} &-:ZM0Fl  
_<6 ^r  
} %\6|fKB4 <  
hxP%m4xF +  
改进后的归并排序: 07[A&B!  
yAy~|1}  
package org.rut.util.algorithm.support; ~pO6C*"  
"T=Z/@Vy  
import org.rut.util.algorithm.SortUtil; !trt]?*-  
%YkJ A:  
/** 6}6;%{p"Gu  
* @author treeroot 5z~rl}`v  
* @since 2006-2-2 ",!#7h  
* @version 1.0 $sTbFY  
*/ qsOA(+ZP  
public class ImprovedMergeSort implements SortUtil.Sort { Se.\wkl#Y  
cY8X A6  
private static final int THRESHOLD = 10; EiQX* v  
4nK\gXz19  
/* /{>$E>N;  
* (non-Javadoc) PIR#M('  
* b#`XmB  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4wjy)VD_  
*/ 4y\qJw)~U  
public void sort(int[] data) { x' >Nz{B,P  
int[] temp=new int[data.length]; Ydm 0  
mergeSort(data,temp,0,data.length-1); ` Fnl<C<  
} [EI~/#;  
KJn@2x6LP  
private void mergeSort(int[] data, int[] temp, int l, int r) { s~ ||Vv!  
int i, j, k; v%v(-, _q  
int mid = (l + r) / 2; O#LG$Y n*  
if (l == r) a~ q_2S]h  
return; l/1u>'  
if ((mid - l) >= THRESHOLD) q.0Evr:  
mergeSort(data, temp, l, mid); ,I6jfXI4  
else Q6blX6DWU  
insertSort(data, l, mid - l + 1); c%y(Z5  
if ((r - mid) > THRESHOLD) 1P4cB w%  
mergeSort(data, temp, mid + 1, r); ZByxC*Cz  
else 7k,pUC-w7c  
insertSort(data, mid + 1, r - mid); \ #<.&`8B  
-#<6  
for (i = l; i <= mid; i++) { DJ_[{WAV  
temp = data; YnM&t ;TX  
} :rxS &5  
for (j = 1; j <= r - mid; j++) { O[}{$NXw  
temp[r - j + 1] = data[j + mid]; %+ln_lgD:  
} mJ+M|#Ox  
int a = temp[l]; J]&^A$  
int b = temp[r]; 0s9-`nHen|  
for (i = l, j = r, k = l; k <= r; k++) { #IJm*_J<  
if (a < b) {  +kA>^  
data[k] = temp[i++]; \^o8qw'pt  
a = temp; bn 7"!6  
} else { ~6{iQZa1Y  
data[k] = temp[j--]; OBb m?`[  
b = temp[j]; Cws;6i*=@  
} 1Vf?Rw  
} d]A.=NAc  
} F}1h  
^}SP,lg'  
/** ;x<5F+b  
* @param data vCvjb\S  
* @param l ak,KHA6u  
* @param i .lsD+}  
*/ )Ehi 8  
private void insertSort(int[] data, int start, int len) { vYFtw L`  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u+/Uc:XK)  
} In[rxT~K}Q  
} Pj-.oS2dA  
} $-D}y:  
} jz,K>   
=Bg $OX  
堆排序: 8H'ybfed  
oACbZ#/@n  
package org.rut.util.algorithm.support; ?"F9~vx&G  
L@5sY0 M  
import org.rut.util.algorithm.SortUtil; kzE<Y  
Ln'y 3~@  
/** tJG+k)EE  
* @author treeroot ^4b;rLfk@  
* @since 2006-2-2 ) $`}~  
* @version 1.0 gt(^9t;  
*/ mEm=SpO[$o  
public class HeapSort implements SortUtil.Sort{ |}7!'f\M  
X-=4Z9  
/* (non-Javadoc) M(^_/ 1Z  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hW!2C6  
*/ eJ*u]GH U  
public void sort(int[] data) { .5"s[(S  
MaxHeap h=new MaxHeap(); oVTXn=cYDp  
h.init(data); tj? %{L  
for(int i=0;i h.remove(); T@Bu Fr`]<  
System.arraycopy(h.queue,1,data,0,data.length); {Gr"lOi*@  
} cP",szcY  
3PjX;U|  
private static class MaxHeap{ \0W0o5c$  
PNz]L  
void init(int[] data){ qeW.~B!B  
this.queue=new int[data.length+1]; P BVF'~f@j  
for(int i=0;i queue[++size]=data; 86pA+c+U  
fixUp(size); .L9g*q/}  
} naro  
} 5hHLC7tT9  
4(91T  
private int size=0; o}&{Y2!x  
eslvg#Q  
private int[] queue; K'}I?H~P_  
YQ@2p?4m  
public int get() { nQOzKw<j%  
return queue[1]; Ma'#5)D  
} r#A*{4wz  
y"Pd>61h  
public void remove() { f|=u{6  
SortUtil.swap(queue,1,size--);  m^\&v0  
fixDown(1); y^e3Gyk  
} 9Trk&OB  
file://fixdown 2z.~K&+x  
private void fixDown(int k) { \#PZZH%  
int j; v8WT?%  
while ((j = k << 1) <= size) { (&1.!R[X  
if (j < size %26amp;%26amp; queue[j] j++; NiFe#SLA  
if (queue[k]>queue[j]) file://不用交换 rq^%)tR  
break; j 7^A%9  
SortUtil.swap(queue,j,k); !MrQ-B(  
k = j; '7pzw>E=:  
} o%f:BJS  
} ) "?eug}D  
private void fixUp(int k) { cRMyYdJ o  
while (k > 1) { F\hVunPVx  
int j = k >> 1; DSRmFxkk  
if (queue[j]>queue[k]) A|,qjiEJCc  
break; _-sFJi8B  
SortUtil.swap(queue,j,k); >gs_Bzy]  
k = j; ZqdoYU'  
} gTgoS:M"_O  
} ]kXW eY<  
`a:3S@n(}  
} yf;TIh%)=  
Gov.;hy  
} o ^ \+Ua  
Kj"X!-  
SortUtil: }zS5o [OE  
SB08-G2  
package org.rut.util.algorithm; $_,-ES I  
@ZjO#%Ep/  
import org.rut.util.algorithm.support.BubbleSort; 6bc\ )n`  
import org.rut.util.algorithm.support.HeapSort; t,dm3+R  
import org.rut.util.algorithm.support.ImprovedMergeSort; 6D[]Jf,9  
import org.rut.util.algorithm.support.ImprovedQuickSort; }vh4ix  
import org.rut.util.algorithm.support.InsertSort; dWQB1Y*N  
import org.rut.util.algorithm.support.MergeSort; P[-do  
import org.rut.util.algorithm.support.QuickSort; dHTx^1  
import org.rut.util.algorithm.support.SelectionSort; WR`NISSp  
import org.rut.util.algorithm.support.ShellSort; fN&uat7  
}#u #m.  
/** 5y 5Dn!`  
* @author treeroot ,~&HL7 v  
* @since 2006-2-2 \v6lcAL-  
* @version 1.0 i\l}M]Z#  
*/ W7b m}JHn  
public class SortUtil { ~@Q ]@8Tv\  
public final static int INSERT = 1; Vs{\ YfF  
public final static int BUBBLE = 2; M2w'cdHk  
public final static int SELECTION = 3; 0^dYu /i5  
public final static int SHELL = 4; ;3wO1'=  
public final static int QUICK = 5; @tY]=pqn_  
public final static int IMPROVED_QUICK = 6; 4oH ,_sr  
public final static int MERGE = 7; D*[J rq,  
public final static int IMPROVED_MERGE = 8; 9M3"'^ {$  
public final static int HEAP = 9; @!'}=?`  
nDX Em6|e  
public static void sort(int[] data) { GF8wKx#J  
sort(data, IMPROVED_QUICK); ^g|cRI_"  
} 'sH_^{V2  
private static String[] name={ T}=^D=  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {ri={p]l  
}; A]5];c  
Xpn\TD<_I  
private static Sort[] impl=new Sort[]{ {4,],0bjx/  
new InsertSort(), j}",+H v  
new BubbleSort(), dd<l;4(  
new SelectionSort(), 9$z$yGjl  
new ShellSort(), D?"P\b[/  
new QuickSort(), ltDohm?  
new ImprovedQuickSort(), abT,"a\h  
new MergeSort(), 85H \v_[  
new ImprovedMergeSort(), @-Q l6k  
new HeapSort() ?.%dQ0  
}; OVDuF&0  
8$A0q%n  
public static String toString(int algorithm){ T\bP8D  
return name[algorithm-1]; Zs=A<[  
} QwWd"Of  
I2}eFz&FE  
public static void sort(int[] data, int algorithm) { {~&Q"8 }G  
impl[algorithm-1].sort(data); y42 Cg  
} fxPg"R!1i  
C'|9nK$%  
public static interface Sort { ,P`NtTN-  
public void sort(int[] data); ./k7""4   
} dGBjV #bNT  
A8vd@0  
public static void swap(int[] data, int i, int j) { v;o1c44;  
int temp = data; oH%[8!#  
data = data[j]; b|Emu!9U  
data[j] = temp; G]f|?  
} xt?-X%oY8  
} +|obU9M  
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