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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。 [#mRlL0yk  
插入排序: NR9=V  
l)K8.(2  
package org.rut.util.algorithm.support; Ef2i#BoZ  
sn-P&"q  
import org.rut.util.algorithm.SortUtil; ;,7/>Vt  
/** K|V<e[X[V  
* @author treeroot +DwE~l  
* @since 2006-2-2 tcD DX'S  
* @version 1.0 6i7+.#s  
*/ JZ>E<U9&  
public class InsertSort implements SortUtil.Sort{ J2avt  
W<tw],M-#  
/* (non-Javadoc) ;w(tXcXZ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DU|>zO%  
*/ AU3>v  
public void sort(int[] data) { W:S?_JM  
int temp; zkb[u"  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 'MK"*W8QRM  
} Y DWV=/  
} b2Oj 1dP1  
} )Rc  
~pWV[oUD  
} Tg_#z  
&OXm^f)K  
冒泡排序: {({Rb$  
y*7{S{9  
package org.rut.util.algorithm.support; 7 <<`9,  
g|=1U  
import org.rut.util.algorithm.SortUtil; t`Lh(`  
}-N4D"d4o  
/** 5=hMTztf!!  
* @author treeroot n"g)hu^B  
* @since 2006-2-2 ~v|NC([(  
* @version 1.0 -I'Jm=q3]  
*/ )l6(ss!J  
public class BubbleSort implements SortUtil.Sort{ 1Rd2Xb  
tYUg%2G  
/* (non-Javadoc) Q$58 K9  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YS0^ !7u  
*/ U>0~/o  
public void sort(int[] data) { Nf!WqD*je  
int temp; a?1lj,"~R  
for(int i=0;i for(int j=data.length-1;j>i;j--){ )uRR!<"~  
if(data[j] SortUtil.swap(data,j,j-1);  sDl @  
} 7?"-:q  
} zJH:`~GxE  
} e#!,/p E  
} dj2w_:&W  
hEMS  
} j^6,V\;l  
BK)3b6L=%  
选择排序: AOv>O52F/Q  
]47!Zo,  
package org.rut.util.algorithm.support; )'i n}M  
pv"QgH  
import org.rut.util.algorithm.SortUtil; 'BX U '  
D $&6 8  
/** B+4WnR1%T  
* @author treeroot )~be<G( a  
* @since 2006-2-2 $Y?[[>u  
* @version 1.0 -58Sb"f  
*/ 1qm _Qs&  
public class SelectionSort implements SortUtil.Sort { {xu~Dx  
o7kQ&w   
/* #ja6nt8GC  
* (non-Javadoc) &6&$vF65c  
* l&{+3aC:  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @B9O*x+n:  
*/ MmH(dp+  
public void sort(int[] data) { Y$0K}`{  
int temp; r*f:%epB%  
for (int i = 0; i < data.length; i++) { d$B+xW  
int lowIndex = i; WXFC e@  
for (int j = data.length - 1; j > i; j--) { 3eN(Sw@p  
if (data[j] < data[lowIndex]) { <RCeY(1  
lowIndex = j; ~tZy-1  
} t*wV<b  
} n'9&q]GN|  
SortUtil.swap(data,i,lowIndex); [PH56f  
} `N;O6 wZ  
} CF]#0*MI  
ffG1QvC|M  
} cpu|tK.t  
q85 4k+C  
Shell排序: 3(3-#MD0  
N[&(e d=  
package org.rut.util.algorithm.support; U-pBat.$'C  
v(`5exWV  
import org.rut.util.algorithm.SortUtil; of/' 9Tj  
chXTFLC~  
/** UHS{X~CS e  
* @author treeroot p+}eP|N  
* @since 2006-2-2 o+g\\5s  
* @version 1.0 iJb-F*_y  
*/ [/Xc},HbMe  
public class ShellSort implements SortUtil.Sort{ ZN}U^9m=  
seiE2F[  
/* (non-Javadoc) `teaE7^Wm  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %ZT I ?a  
*/ Lm7fz9F%  
public void sort(int[] data) { ~}g) N  
for(int i=data.length/2;i>2;i/=2){ @<z#a9  
for(int j=0;j insertSort(data,j,i); xV.UM8  
} ?7dV:]%~2  
} >o5eyi  
insertSort(data,0,1); ^w*&7.Z  
} Y@MFH>*  
AH|'{  
/** !m?W+ z~J  
* @param data cv9-ZOxJ  
* @param j VWW(=j  
* @param i ,B$e'KQ  
*/ 1i}p?sU  
private void insertSort(int[] data, int start, int inc) { (|sqN8SbA  
int temp; V"5LNtf  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); `o6T)49  
} &24>9  
} xbs X-F  
} 15ImwQ  
(``|5;T\  
} 3yu,qb'"&  
dF'oZQz  
快速排序: iCdq-r/r!6  
23'Ac,{  
package org.rut.util.algorithm.support; Bi|-KS.9  
E[M.q;rM  
import org.rut.util.algorithm.SortUtil; %:Y'+!bX  
W<M\ b#  
/** VL2ACv(  
* @author treeroot UQ~gjnb[c  
* @since 2006-2-2 3$P GLM  
* @version 1.0 <zp|i#~  
*/ H;Gd  
public class QuickSort implements SortUtil.Sort{ 2o1 RJk9  
@pV&{Vp  
/* (non-Javadoc) ;_E][m  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Rip[  
*/ PjkjUP  
public void sort(int[] data) { cWp5pGIzfp  
quickSort(data,0,data.length-1); FmhN*ZXr #  
} z6'l" D'h  
private void quickSort(int[] data,int i,int j){ L87=*_!B;  
int pivotIndex=(i+j)/2; %i@Jw  
file://swap >:P-3#e*  
SortUtil.swap(data,pivotIndex,j); CM 8Ub%  
Jqqt@5Ni  
int k=partition(data,i-1,j,data[j]); g&O!w!T  
SortUtil.swap(data,k,j); `.YMbj#T  
if((k-i)>1) quickSort(data,i,k-1); -XWlmw*i(g  
if((j-k)>1) quickSort(data,k+1,j); ty b-VO  
yOE N*^6  
} ^vc#)tm5p  
/** L lVE5f?  
* @param data J#Agk^Y 5  
* @param i wu19Pg?F  
* @param j g42f*~l  
* @return uEdeA'*^  
*/ /^b=| +Do  
private int partition(int[] data, int l, int r,int pivot) { qQe23,x@5  
do{ @^^,VgW[  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); tV9K5ON  
SortUtil.swap(data,l,r); |1UJKJwX  
} 92g&,Wb  
while(l SortUtil.swap(data,l,r); { u1\M  
return l; MJG)fFl] O  
} nj7\vIR7  
5Cl;h^R|m  
} c'Zs2s7$  
Uc5BNk7<=  
改进后的快速排序: -4t!k Aw`  
ux1SQ8C*  
package org.rut.util.algorithm.support; OB\jq!"  
[-w+ACV~  
import org.rut.util.algorithm.SortUtil; ~%u;lr  
ePe/@g1K*  
/** "U iv[8B  
* @author treeroot hlBqcOpkKg  
* @since 2006-2-2 ~4u[\&Sh  
* @version 1.0 6q@VkzF  
*/ AHdh]pfH  
public class ImprovedQuickSort implements SortUtil.Sort { U[c^xz&  
sU;aA0kz  
private static int MAX_STACK_SIZE=4096; qm|T<zsDY#  
private static int THRESHOLD=10; j/w*2+&v  
/* (non-Javadoc) lU%L  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]L9$JTGF`w  
*/ xkmqf7w  
public void sort(int[] data) { q|kkdK|N/Y  
int[] stack=new int[MAX_STACK_SIZE]; g:fzf>oQ>p  
H(ds  
int top=-1; ~19&s~  
int pivot; O"f|gc)GLz  
int pivotIndex,l,r; THz=_L6  
mY!&*nYn|  
stack[++top]=0; ,B$m8wlI|  
stack[++top]=data.length-1; 8? &!@3n  
h}f l:J1C  
while(top>0){ ZqJyuTPv  
int j=stack[top--]; {{Z3M>Q  
int i=stack[top--]; _sC kBDl-  
"oo j;  
pivotIndex=(i+j)/2; U$AV"F&!&}  
pivot=data[pivotIndex]; ec"+Il  
75RQ\_zDu  
SortUtil.swap(data,pivotIndex,j); DT>Giic  
aDVBi: _  
file://partition p^?]xD(  
l=i-1; jt4c*0z  
r=j; <h mRr  
do{ IjnO2X  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); Qj(|uGqm3  
SortUtil.swap(data,l,r); F!~oJ  
} QOKE9R#Y  
while(l SortUtil.swap(data,l,r); GB` G(a  
SortUtil.swap(data,l,j); av4g/7=  
yZqX[U  
if((l-i)>THRESHOLD){ |-.r9;-b  
stack[++top]=i; E:S (v  
stack[++top]=l-1; /\|Behif  
} l|'{Cb   
if((j-l)>THRESHOLD){ 1g bqHxWI  
stack[++top]=l+1; 0v'FE35~s  
stack[++top]=j; |(O _K(  
} ul[+vpH9  
+oRwXO3W  
} LM?UV)  
file://new InsertSort().sort(data); 8ZvozQE  
insertSort(data); wEMg~Hh  
} 7~7_T#dTh  
/** /GMT  
* @param data Mh*^@_h?  
*/ GsvB5i  
private void insertSort(int[] data) { o%$'-N  
int temp; Bd-@@d.H<  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); LSW1,}/B  
} +6+!M_0wA  
} 2JS&zF  
} _S;Fs|p_  
j3)fmlA  
} UsBtk  
j5]6 CG_  
归并排序: l[Rl:k!  
0ntf%#2{  
package org.rut.util.algorithm.support; Qlgii_?#@  
=RH7j  
import org.rut.util.algorithm.SortUtil; 3( `NHS~h  
O'~;|-Z<  
/** ;&MI M`&$  
* @author treeroot WwYy[3U  
* @since 2006-2-2 ~x 0x.-^A  
* @version 1.0 x,>r}I>^Q  
*/ cuW&X9\m,  
public class MergeSort implements SortUtil.Sort{ P *zOt]T  
X!ad~bt  
/* (non-Javadoc) 92)e/t iP  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @?\[M9yK  
*/ =}7[ypQM`]  
public void sort(int[] data) { @h";gN  
int[] temp=new int[data.length]; (_$'e%G0  
mergeSort(data,temp,0,data.length-1);  2/v9  
} O6Jn$'os1#  
1Wy0#?L  
private void mergeSort(int[] data,int[] temp,int l,int r){ :{ Q[kYj  
int mid=(l+r)/2; ";$rcg"%X  
if(l==r) return ; =TG[isC/F9  
mergeSort(data,temp,l,mid); MW$ X4<*KD  
mergeSort(data,temp,mid+1,r); pQf5s7  
for(int i=l;i<=r;i++){ *='J>z.]  
temp=data; j65qIw_Z  
} j`pX2S  
int i1=l; :q,tmk h  
int i2=mid+1; R@Kzdeo  
for(int cur=l;cur<=r;cur++){ BT8L'qEj  
if(i1==mid+1) >V1v.JH  
data[cur]=temp[i2++]; Y6r<+#V  
else if(i2>r) x=~$ik++  
data[cur]=temp[i1++]; X23#y7:  
else if(temp[i1] data[cur]=temp[i1++]; -VVJf5/  
else %an&lcoX  
data[cur]=temp[i2++]; N% W298  
} Uc<j{U ,  
} S eTn]  
XAF*jevr  
} qH1&tW$  
E+xC1U 3  
改进后的归并排序: NwPC9!*  
smTPca)7s  
package org.rut.util.algorithm.support; hxQx$  
EvQMt0[?EW  
import org.rut.util.algorithm.SortUtil; 9C2DW,?  
`;vJ\$-<  
/** u >W:SM  
* @author treeroot |E#+X  
* @since 2006-2-2 1so9w89  
* @version 1.0 ;+-Dg3  
*/ sF+Bu'9A  
public class ImprovedMergeSort implements SortUtil.Sort { 5h6c W  
y-i6StJ  
private static final int THRESHOLD = 10; eW>Y*l% B  
>wOqV!0<  
/* e qzmEg  
* (non-Javadoc) OX!<{9o  
* =2rkaBFC  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1?}5.*j<  
*/ 6)_svtg  
public void sort(int[] data) { ltH?Ew<]  
int[] temp=new int[data.length]; ?ot7_vl  
mergeSort(data,temp,0,data.length-1); 3!:?OUhx  
} EiP#xjn?c  
1o*eu&@  
private void mergeSort(int[] data, int[] temp, int l, int r) { h~R= ?%H[  
int i, j, k; a(BEm_l3  
int mid = (l + r) / 2; M~jV"OF=  
if (l == r) S%t*!  
return; *[SOz)  
if ((mid - l) >= THRESHOLD) P UJkC  
mergeSort(data, temp, l, mid); 48 n5Y~YS  
else { *&Wc Os  
insertSort(data, l, mid - l + 1); y.PsC '  
if ((r - mid) > THRESHOLD) rE[:j2HF  
mergeSort(data, temp, mid + 1, r); i,z^#b7JQ  
else $63_* 9  
insertSort(data, mid + 1, r - mid); aUTXg60l*  
ta'{S=^j  
for (i = l; i <= mid; i++) { 'W2B**}  
temp = data; ?7]UbtW[  
} =Mby;wQ?|  
for (j = 1; j <= r - mid; j++) { ;Or]x?-  
temp[r - j + 1] = data[j + mid]; q{:]D(   
} nhZ^`mP  
int a = temp[l]; v3 q.,I_  
int b = temp[r]; nS5g!GYY,k  
for (i = l, j = r, k = l; k <= r; k++) { b|KlWt'  
if (a < b) { xh) h#p.  
data[k] = temp[i++]; n B .?=eUa  
a = temp; <bbC &O\  
} else { z +NwGVk3  
data[k] = temp[j--]; jf WZLb)  
b = temp[j]; ;[,r./XmH  
} ,K>q{H^  
} 4[o/p8*/  
} cU  
c?H@HoF  
/** 6myF!  H=  
* @param data (n+FEE<  
* @param l @3_[NI%  
* @param i jMV9r-{*+  
*/ -Y=o  
private void insertSort(int[] data, int start, int len) { Qf:#{~/  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9iy3 dy^  
} Q`{2 yU:r  
} a2!;$B%  
} |_GESpoHH  
} fp`k1Uq@  
XJI ff$K  
堆排序: h:3^FV&#  
:)eU)r"s4  
package org.rut.util.algorithm.support; B65"jy  
~( ~ y=M  
import org.rut.util.algorithm.SortUtil; WPpS?  
_ \LP P_  
/** cq#=Vb  
* @author treeroot &]_2tN=S$  
* @since 2006-2-2 lv=rL  
* @version 1.0 =(cfo_B@K  
*/ 7(W"NF{r  
public class HeapSort implements SortUtil.Sort{ snm1EPj  
r 1x2)  
/* (non-Javadoc) $FM: 8^  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A]_5O8<buW  
*/ G%#M17   
public void sort(int[] data) { 8`GN8 F  
MaxHeap h=new MaxHeap(); &RL j^A!  
h.init(data); NB=!1;^J  
for(int i=0;i h.remove(); 6 #m:=  
System.arraycopy(h.queue,1,data,0,data.length); T_NN.Ol   
} qvN`46c  
 aWTvowA  
private static class MaxHeap{ Hph$Z 1{  
k0^t$J W  
void init(int[] data){ X7Z=@d(  
this.queue=new int[data.length+1]; lV ra&5  
for(int i=0;i queue[++size]=data; p/WE[8U  
fixUp(size); N*NGC!p`N  
} $z[r (a^a  
} kX8Ey  
L+N;mI8  
private int size=0; 5`QN<4?%  
dc=~EG-_rM  
private int[] queue; >tQ$V<YB  
 57`*5X  
public int get() { YU6D;  
return queue[1]; 9J4gDw4<  
} ]~d!<x#+  
#-{^={p "  
public void remove() { $_orxu0W  
SortUtil.swap(queue,1,size--); &(/QJ`*8  
fixDown(1); mF`%Z~}b  
} ';iLk[  
file://fixdown gH<A.5 xy  
private void fixDown(int k) { ^P~NE#p5  
int j; eH' J  
while ((j = k << 1) <= size) { FwaYp\z  
if (j < size %26amp;%26amp; queue[j] j++; yD:}&!\}  
if (queue[k]>queue[j]) file://不用交换 t1rAS.z&  
break; + X0db  
SortUtil.swap(queue,j,k); -hpC8YS  
k = j; 0Ma3  
} KnxK9  
} W>cHZ. _  
private void fixUp(int k) { m$!Ex}2  
while (k > 1) { s_RUb  
int j = k >> 1; rOA{8)jIa*  
if (queue[j]>queue[k])  Ds@nuQ  
break; C]GW u~QF  
SortUtil.swap(queue,j,k); -![>aqWmj1  
k = j; </-aG[Fi  
} a"bael  
} #.W^7}H  
?f&O4H  
} gv}J"anD  
}Jm~b9j  
} %z "${ zw  
SsfHp  
SortUtil: +5xk6RP   
&{z RuF  
package org.rut.util.algorithm; (>M? iB  
Gq0Q}[53  
import org.rut.util.algorithm.support.BubbleSort; I|/\L|vo  
import org.rut.util.algorithm.support.HeapSort; _4-UM2o;  
import org.rut.util.algorithm.support.ImprovedMergeSort; ;!Q}g19C  
import org.rut.util.algorithm.support.ImprovedQuickSort; kDWMget$  
import org.rut.util.algorithm.support.InsertSort; /j$`Cq3I  
import org.rut.util.algorithm.support.MergeSort; 'd |*n#Dqc  
import org.rut.util.algorithm.support.QuickSort; }+dDGFk  
import org.rut.util.algorithm.support.SelectionSort; *9)yN[w  
import org.rut.util.algorithm.support.ShellSort; !v68`l15  
(y!V0iy]  
/** ds "N*\.  
* @author treeroot 9D,/SZ-v  
* @since 2006-2-2 rJw Ws  
* @version 1.0 U])$#/ v  
*/ vHM,_I{  
public class SortUtil { s~n@|m9k  
public final static int INSERT = 1; 4ztU) 1  
public final static int BUBBLE = 2; \Jm^XXgS  
public final static int SELECTION = 3; >})W5Y+  
public final static int SHELL = 4; z 8y.@<6  
public final static int QUICK = 5; y41,T&ja  
public final static int IMPROVED_QUICK = 6; 5Zy%Nam'gN  
public final static int MERGE = 7; W+`T:Mgh  
public final static int IMPROVED_MERGE = 8; $c1xh.  
public final static int HEAP = 9; =kDh:&u%  
+Vw]DLWR  
public static void sort(int[] data) { Y |'}VU  
sort(data, IMPROVED_QUICK); M=#'+CF}W  
} CA]u3bf~  
private static String[] name={ 2kW*Z7@D  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A| s\5"??  
}; ;nbbKQ]u  
G' 0JK+=o  
private static Sort[] impl=new Sort[]{ s~g0VNu Y  
new InsertSort(), i>{.Y};  
new BubbleSort(), [|tlTk   
new SelectionSort(), #H-EOXy  
new ShellSort(), kJk6lPSqi7  
new QuickSort(), b<8,'QgB  
new ImprovedQuickSort(), "pTU&He  
new MergeSort(), ),5|Ves;t[  
new ImprovedMergeSort(), cg).b?g  
new HeapSort() &at>sQ'  
}; ]%eyrbU  
|h^]`= 3  
public static String toString(int algorithm){ >eucQ]  
return name[algorithm-1]; ,HECHA_"  
} a2SXg A  
:]uz0s`>  
public static void sort(int[] data, int algorithm) {  RI&V:1  
impl[algorithm-1].sort(data); K %.>o  
} XkEE55#>|  
jSdW?IH  
public static interface Sort { 3F?_{A  
public void sort(int[] data); !~ fy".|x  
} 6YF<GF{  
nl+8C}=u  
public static void swap(int[] data, int i, int j) { 't n-o  
int temp = data; /4{IxQk  
data = data[j]; vu|-}v?:  
data[j] = temp; -h%1rw  
} /j"aOLL|  
} x9i^ _3Z  
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