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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。 Xh7~MU~X  
插入排序: hX>VVeIZ  
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package org.rut.util.algorithm.support; 0gwm gc/#  
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import org.rut.util.algorithm.SortUtil; ^\7 x5gO  
/** k *G!.  
* @author treeroot ]2aYi9)  
* @since 2006-2-2 Z uFV tW@  
* @version 1.0 tn:/pPap  
*/ #Vn>ue+?  
public class InsertSort implements SortUtil.Sort{ *x*,I ,03  
V#-qKV  
/* (non-Javadoc) O$<%z[  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HX /GLnY/X  
*/ m>*A0&??[  
public void sort(int[] data) { 8XS {6<  
int temp; (A]m=  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 1a=9z'8V  
} 3x(MvW30Lg  
} mD^qx0o<  
} 8XH|T^5  
dm/\uE'l  
} w.T=Lzp  
.j:.WnW  
冒泡排序: @ (u?=x;  
},Y; (n'  
package org.rut.util.algorithm.support; JXSqtk=  
t6h`WAZV  
import org.rut.util.algorithm.SortUtil; Qa7S'(  
aCH:#|B  
/** WFeMr%Zqh>  
* @author treeroot ].<sAmL^  
* @since 2006-2-2 #<tWYE  
* @version 1.0 f,`}hFD  
*/ eUKl Co  
public class BubbleSort implements SortUtil.Sort{ U$/Hp#~X  
O)RzNfI^`N  
/* (non-Javadoc) e??{&[  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rs 1*H  
*/ [K)1!KK,L  
public void sort(int[] data) { R26tQbwE  
int temp; ,@'){V  
for(int i=0;i for(int j=data.length-1;j>i;j--){ Dt~}9HrU  
if(data[j] SortUtil.swap(data,j,j-1); QIMv9;  
} WRcFE<  
} `6BS-AVO7  
} \_I)loPc8  
} z?t(+^  
2YE]?!   
} WKrZTPD'm  
evmEX<N  
选择排序: Lx:N!RDw  
.e _D3Xp<  
package org.rut.util.algorithm.support; >NOYa3  
(E1>}  
import org.rut.util.algorithm.SortUtil; j]?0}Z*  
aWsKJo>j[#  
/** X+gz+V/  
* @author treeroot  4Jk}/_  
* @since 2006-2-2 +/>YH-P=  
* @version 1.0 _ !^FW%  
*/ DCt:EhC  
public class SelectionSort implements SortUtil.Sort {  > ^v8N  
xu?QK6D:  
/* [A..<[  
* (non-Javadoc) |phWK^   
* N;ecT@U g  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <<2b2?a S`  
*/ @`y?\fWh  
public void sort(int[] data) { 'y M:W cN  
int temp; '3u]-GU2_  
for (int i = 0; i < data.length; i++) { ,^IZ[D>u)  
int lowIndex = i; >'|xQjLl  
for (int j = data.length - 1; j > i; j--) { Lj Q1ar\  
if (data[j] < data[lowIndex]) { ? -F'0-t4%  
lowIndex = j; 33KPo0g7  
} h'y@M+c(  
} rDx],O _  
SortUtil.swap(data,i,lowIndex); NdSxWrD`m  
} '5,,XhP  
} tEX~72v  
j_WF38o  
} ])wMUJWg2  
' bw,K*  
Shell排序: CG>2 ,pP,  
&N7:k+E  
package org.rut.util.algorithm.support; <:{[Zvl'k  
?a0}^:6  
import org.rut.util.algorithm.SortUtil; n#4J]Z@  
S5 nw  
/** h7]]F{r5  
* @author treeroot qCkg\)Ks5I  
* @since 2006-2-2 >)A  
* @version 1.0 W>|b98NPu  
*/ g+/U^JIc4l  
public class ShellSort implements SortUtil.Sort{ GN;XB b]w  
=i5:*J  
/* (non-Javadoc) >hL'#;:f#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VaI P  
*/ ` dUiz5o'  
public void sort(int[] data) { S 2 h  
for(int i=data.length/2;i>2;i/=2){ GK+\-U)v  
for(int j=0;j insertSort(data,j,i); -Us% g  
} U?^|>cMr  
} _>m*`:Wb  
insertSort(data,0,1); 8B t-  
} JHZo:Ad -&  
kJeOlO[  
/** _]ttKT(  
* @param data FC(cXPX}  
* @param j U?ic$J]N  
* @param i ?~Ed n-" Y  
*/  Y*}>tD;  
private void insertSort(int[] data, int start, int inc) { c_qy)N  
int temp; h16Nr x  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); eC`f8=V  
} Jc?ssm\%  
} 8=o(nFJw  
} +2 o|#`)i  
nkj'AH"2  
} 842+KLS  
2b,TkG8K  
快速排序: RF2XJJ  
kpw4Mq@  
package org.rut.util.algorithm.support; _po 4(U&  
*-LU'yM6Yh  
import org.rut.util.algorithm.SortUtil; ZL@DD(S-/  
<0 idG  
/** CgKSK0/a  
* @author treeroot RWQW/Gw x  
* @since 2006-2-2 :tG".z  
* @version 1.0 QGj5\{E_  
*/ gq1Y]t|4F  
public class QuickSort implements SortUtil.Sort{ 1WN93 SQ=  
UnF4RF:A2&  
/* (non-Javadoc) VEEeQy  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y" -{6{3  
*/ 7[1 R}G V  
public void sort(int[] data) { ,T~5iLKY  
quickSort(data,0,data.length-1); >qvD3 9w  
} ZxPAu%Y  
private void quickSort(int[] data,int i,int j){ qm5pEort  
int pivotIndex=(i+j)/2; c qyh#uWe  
file://swap jt r=8OiL  
SortUtil.swap(data,pivotIndex,j); 1CVaGD^r{  
3 v$4LY  
int k=partition(data,i-1,j,data[j]); m8^2k2  
SortUtil.swap(data,k,j); SZD2'UaG  
if((k-i)>1) quickSort(data,i,k-1); X(z-?6N4  
if((j-k)>1) quickSort(data,k+1,j); be#"517  
]LOtwY  
} {*$J&{6V  
/** G_mu7w  
* @param data 2`m_"y  
* @param i @il}0  
* @param j CWYJ<27v{  
* @return B[X6A Qj}d  
*/ I|;#VejX  
private int partition(int[] data, int l, int r,int pivot) { 94@!.11  
do{ yuX 0Y{:I  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); DP]|}8~L  
SortUtil.swap(data,l,r); {~h\;>  
} W)hby`k  
while(l SortUtil.swap(data,l,r); K(<P" g(  
return l; #7ZBbq3=  
} /n:fxdhe  
JCfToFB  
} R\amcQ 9  
kl"Cm`b)  
改进后的快速排序:  m:Abq`C  
rWqA)j*!  
package org.rut.util.algorithm.support; ".<p R} qp  
$?{zV$r1  
import org.rut.util.algorithm.SortUtil; I GtH<0Du  
n_meJm.  
/** \c}r6xOr  
* @author treeroot j=S"KVp9NF  
* @since 2006-2-2 [1CxMk~"[  
* @version 1.0 .utL/1Ej  
*/ )^sfEYoA  
public class ImprovedQuickSort implements SortUtil.Sort { \ y",Qq?  
oP 0j>i,"&  
private static int MAX_STACK_SIZE=4096; )~(_[='  
private static int THRESHOLD=10; HI 61rXNF  
/* (non-Javadoc) 7HFO-r118  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0eP~F2<bC  
*/ kyB]fmS  
public void sort(int[] data) { p~ItHwiT  
int[] stack=new int[MAX_STACK_SIZE]; c'R|Wyf  
v4aGL<SO  
int top=-1; M6!brj\[|  
int pivot; pBkPn+@  
int pivotIndex,l,r; yQ50f~9  
c= u ORt>  
stack[++top]=0; RA/yvr  
stack[++top]=data.length-1; 0fU>L^P_?  
LL+rd xJO^  
while(top>0){ u*`GIRfWT  
int j=stack[top--]; 9t1_"{'N1  
int i=stack[top--]; -<=< T@,  
wf1DvsJQl  
pivotIndex=(i+j)/2; DYK|"@  
pivot=data[pivotIndex]; Y;>'~V#R  
(tN$G:+")F  
SortUtil.swap(data,pivotIndex,j); UxtZBNn8  
m=V2xoMw6  
file://partition [y>.)BU  
l=i-1; K%Bi8d  
r=j; XZGyhX7  
do{ rfoCYsX'  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); H(s^le:!  
SortUtil.swap(data,l,r); %BKTN@;7  
} N0PX<$y  
while(l SortUtil.swap(data,l,r); >0oc=9H8  
SortUtil.swap(data,l,j); ZT#G:a  
eSU8/9B  
if((l-i)>THRESHOLD){ LlJvuQ 28  
stack[++top]=i; jXf-+ ;ZQ  
stack[++top]=l-1; is$d<Y&F  
} [&:oS35O  
if((j-l)>THRESHOLD){ 0 CS_-  
stack[++top]=l+1; HZ3<}`P_W  
stack[++top]=j; PYe>`X?  
} ?}>tfDu'  
{ L5m`-x  
} [tN/}_]  
file://new InsertSort().sort(data); OH w6#N$\  
insertSort(data); @ 2_&ti  
} </QSMs  
/** ->(B: Cz  
* @param data l?;S>s*\?  
*/ plq\D.C  
private void insertSort(int[] data) { bOdD:=f  
int temp; K0]Wb=v  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); cg5DyQ(  
} ` g~-5Z~J  
} 5{> cfN\q  
} m[f\I^ \%8  
T$e_ao|  
} I f(_$>  
P$bo8*  
归并排序: EbQ}w"{  
5tL6R3  
package org.rut.util.algorithm.support; n|.;g!QDA  
LFC k6 R  
import org.rut.util.algorithm.SortUtil; c LJCLKJ  
+j,;g#d  
/** !FO)||'[  
* @author treeroot b%BwGS(z  
* @since 2006-2-2 |8B[yr.b  
* @version 1.0 3]i1M%'i  
*/ C6`8dn   
public class MergeSort implements SortUtil.Sort{ RUEU n  
`6/7},"9t  
/* (non-Javadoc) k8TMdWW  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R+\5hI@ >i  
*/ };*5+XY^  
public void sort(int[] data) { .o>QBYpTw/  
int[] temp=new int[data.length]; RwE]t$T/  
mergeSort(data,temp,0,data.length-1); h4/rw fp^  
} OQq7|dZu  
2+enRR~  
private void mergeSort(int[] data,int[] temp,int l,int r){ 7>nA;F 8_  
int mid=(l+r)/2; !q X 7   
if(l==r) return ; "elh~K  
mergeSort(data,temp,l,mid); t`?FSV  
mergeSort(data,temp,mid+1,r); Q7C'O @  
for(int i=l;i<=r;i++){ S%4 K-I  
temp=data; 8P .! q  
} U;(&!Ei  
int i1=l; G`pI{_-e  
int i2=mid+1; E-x(5^b"  
for(int cur=l;cur<=r;cur++){ w3*JVIQC  
if(i1==mid+1) QMIXz[9w  
data[cur]=temp[i2++]; ?}y7S]B FI  
else if(i2>r) /mb| %U]~  
data[cur]=temp[i1++];  oDC3AK&  
else if(temp[i1] data[cur]=temp[i1++]; #&2mu  
else v1} $FmHL"  
data[cur]=temp[i2++]; 'g#))y  
} D526X0  
} M1^pW 63  
Zy'bX* s|  
} 0zd1:*KR,  
i@2?5U>h  
改进后的归并排序: |y]#-T?)t  
0iYe>u  
package org.rut.util.algorithm.support; xZkLN5I{  
b;yhgdFx  
import org.rut.util.algorithm.SortUtil; |peZ`O^ ~  
3Ry?{m^  
/** yCz? V[49  
* @author treeroot <Z vG&  
* @since 2006-2-2 S4Rv6{r:  
* @version 1.0 e0D;]  
*/ ]`MRH[{  
public class ImprovedMergeSort implements SortUtil.Sort { ?D.] c;PR  
(Yx rZ_F'b  
private static final int THRESHOLD = 10; k8h$#@^  
pd|c7D!6U,  
/* X 6>Pq  
* (non-Javadoc) '\9A78NV{;  
* $rdA0%;  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )wKuumet  
*/ TPkm~>zD.  
public void sort(int[] data) { c!I> _PD`&  
int[] temp=new int[data.length]; nI 6`/  
mergeSort(data,temp,0,data.length-1); ^,?]]=mE  
} Tj>~#~  
*bZV4}  
private void mergeSort(int[] data, int[] temp, int l, int r) { 0s4%22  
int i, j, k; BqR8%F  
int mid = (l + r) / 2; a/?gp>M9  
if (l == r) <uA|nYpp  
return; Z!#zr@'k  
if ((mid - l) >= THRESHOLD) d/;oNC+  
mergeSort(data, temp, l, mid); }ulFW]A^7  
else A}$A~g5 Ap  
insertSort(data, l, mid - l + 1); utQ_!3u  
if ((r - mid) > THRESHOLD) s,0,w--=  
mergeSort(data, temp, mid + 1, r); e'u 9 SpJ  
else _$1W:!f4  
insertSort(data, mid + 1, r - mid); ><$hFrR!  
f~E'0f_  
for (i = l; i <= mid; i++) { hG3b7!^#g  
temp = data; *s_)E 2  
} ^oA^z1>3  
for (j = 1; j <= r - mid; j++) { Yh4e\]ql~N  
temp[r - j + 1] = data[j + mid]; p#3P`I>ZrT  
} b-ZvEDCR  
int a = temp[l]; / VJ[1o^  
int b = temp[r]; \5J/ ?  
for (i = l, j = r, k = l; k <= r; k++) { aG,N>0k8  
if (a < b) { NK d8XQ=%  
data[k] = temp[i++]; #A?U_32z/2  
a = temp; a?@j`@]ZR~  
} else { kRG-~'f%`  
data[k] = temp[j--]; 4j/8Otn  
b = temp[j]; [Q)lJTs  
} Byon2|nf7  
} T#T!a0  
} M,6m*  
ca-|G'q  
/** yay{lP}b"  
* @param data j5tA!o  
* @param l 5&6S["lt  
* @param i l 4(-yWC$H  
*/ #Ey!?Z  
private void insertSort(int[] data, int start, int len) { 7j{SCE;  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J}lBK P:-*  
} Z5\u9E"]  
} Zs)HzOP)9  
} ^cd+W?  
} 4K:p  
d&t |Y:,8  
堆排序: AOhsat;O`  
zZseK  
package org.rut.util.algorithm.support; Pr/K5aJeg  
,D>$N3;  
import org.rut.util.algorithm.SortUtil; "w=.2A:q  
}7k+tJ<   
/** >OmY  
* @author treeroot :jgwp~l  
* @since 2006-2-2 @ScH"I];uA  
* @version 1.0 uQ. m[y  
*/ ABB4(_3E  
public class HeapSort implements SortUtil.Sort{ :Q"]W!kCs  
W8R@Pf  
/* (non-Javadoc) _G,`s7Q,w  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MHk\y2`/;  
*/ 3\G&fb|?}R  
public void sort(int[] data) { T/UhZ4(V  
MaxHeap h=new MaxHeap(); r( :"BQ  
h.init(data); r@^h,  
for(int i=0;i h.remove(); 5q}680s9+  
System.arraycopy(h.queue,1,data,0,data.length); u:NSPAD)  
} yiiYq(\{  
%jim] ]<S[  
private static class MaxHeap{ D?;$:D"  
1\TXb!OtL  
void init(int[] data){ D`2Iy.|!  
this.queue=new int[data.length+1]; ) j_g*<  
for(int i=0;i queue[++size]=data; *dL!)+:d  
fixUp(size); H~e;S#3_v  
} Y }aa6  
} :"|}oKT%mP  
ci <`*>l  
private int size=0; gyondcF  
&ScADmZP^d  
private int[] queue; ,GA2K .:#  
49E<`f0  
public int get() { |Qo;=~7  
return queue[1]; ^Bf@ I  
} VZ 5EV'D8!  
d:|X|0#\uH  
public void remove() { CfNHv-jDL  
SortUtil.swap(queue,1,size--); rfpeX   
fixDown(1); m(L]R(t  
}  LkD$\i  
file://fixdown OEnJ".&V  
private void fixDown(int k) { 7aj|-gZ  
int j; M1^,g~e  
while ((j = k << 1) <= size) { )4vZIU#  
if (j < size %26amp;%26amp; queue[j] j++; FY|.eY_7 {  
if (queue[k]>queue[j]) file://不用交换 DBI[OG9  
break; DJ2EV^D+P  
SortUtil.swap(queue,j,k); mp:%k\cF|  
k = j; NjIe2)}'  
} W9D]s~bO;  
}  |W];8  
private void fixUp(int k) { C: @T5m  
while (k > 1) { N{U``LV  
int j = k >> 1; L1 1/XpR  
if (queue[j]>queue[k]) {7LO|E}7  
break; wuSp+?{5k  
SortUtil.swap(queue,j,k); i Tg?JoE2  
k = j; BFmd`#{l  
} y w)q3zC  
} fgVeB;k|  
[#S}L(  
} NHG+l)y:  
vtM!?#  
} @-|{qP=Dy  
+YVnA?r?  
SortUtil: 6Lk<VpAa  
|r[yMI|VR  
package org.rut.util.algorithm; 2 UU5\ jV6  
g!;k$`@{E'  
import org.rut.util.algorithm.support.BubbleSort; c%9wI*l  
import org.rut.util.algorithm.support.HeapSort; tkx1iBW=  
import org.rut.util.algorithm.support.ImprovedMergeSort; >bWx!M]  
import org.rut.util.algorithm.support.ImprovedQuickSort; &(UVS0=Dp,  
import org.rut.util.algorithm.support.InsertSort; $R4[TQY).!  
import org.rut.util.algorithm.support.MergeSort; l=G=J(G  
import org.rut.util.algorithm.support.QuickSort; =X6WK7^0  
import org.rut.util.algorithm.support.SelectionSort; ?9 hw]Q6r}  
import org.rut.util.algorithm.support.ShellSort; 1:%HE*r  
/R7qR#  
/** }<6xZy  
* @author treeroot }JyWy_Y  
* @since 2006-2-2 m&(yx| a4+  
* @version 1.0 `KBgVhS>  
*/ l ps 6lnh  
public class SortUtil { {Hxvt~P  
public final static int INSERT = 1; {-;lcOD  
public final static int BUBBLE = 2; 9t:P1  
public final static int SELECTION = 3; ICwhqH&  
public final static int SHELL = 4; 0O+[z9  
public final static int QUICK = 5; HO%atE$>  
public final static int IMPROVED_QUICK = 6; pcwkO  
public final static int MERGE = 7; mVFz[xI  
public final static int IMPROVED_MERGE = 8; $xqI3UaX  
public final static int HEAP = 9; <Hw)},_*  
%"Tn=fZIF  
public static void sort(int[] data) { 'wB6-  
sort(data, IMPROVED_QUICK); 7A'd55I4  
} rV.04m,  
private static String[] name={ JbN@AX:%  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~"F83+RDe  
}; CMn&1  
)2t!= ua  
private static Sort[] impl=new Sort[]{ gn"Y?IZ?  
new InsertSort(), >Hb>wlYR  
new BubbleSort(), n46A  
new SelectionSort(), <j"}EEb^  
new ShellSort(), *c'nPa$+|S  
new QuickSort(), j. UQLi&`  
new ImprovedQuickSort(), pMZKF=  
new MergeSort(), ^~~&[wY  
new ImprovedMergeSort(), Z@ AHe`A  
new HeapSort() I`Goc!5t  
}; *((wp4b  
Itn7Kl  
public static String toString(int algorithm){ OL+dx`Y  
return name[algorithm-1]; 0IU>KGJ-0s  
} :.KN;+tP  
U(#)[S,  
public static void sort(int[] data, int algorithm) { #>~<rcE(  
impl[algorithm-1].sort(data); W'2T7ha Es  
} +c&n7  
242dT/j  
public static interface Sort { h!# (.P  
public void sort(int[] data); x;A"S  
} gD&/ k  
,M@LtA3g  
public static void swap(int[] data, int i, int j) { ~&-8lD];LM  
int temp = data; fh~"A`d  
data = data[j]; R  Fgy  
data[j] = temp; q;co53.+P)  
} ];BGJ5^j  
} 01v7_*'R  
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