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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。 dwB#k$VIOw  
插入排序: yam'LF  
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package org.rut.util.algorithm.support; w31O~Ve  
^kNVQJiZyG  
import org.rut.util.algorithm.SortUtil; =Jl\^u%H(x  
/** TgV-U  
* @author treeroot ?5">50  
* @since 2006-2-2 \_.'/<aQ  
* @version 1.0 mL1ZSX o!  
*/ 1R-0b{w[  
public class InsertSort implements SortUtil.Sort{ EUw4$Jt^p  
?:vg`m!*  
/* (non-Javadoc) wOL%otEf  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 53uptQ{   
*/ 3SWDPy  
public void sort(int[] data) { z]g#2xD2  
int temp; Jy:@&c  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); X{xkXg8h  
} ,Z|O y|+'  
} rIPg,4y*S!  
} fQ~~%#z1  
5%(  
} w#9.U7@.  
f|~'(~Sr  
冒泡排序: IJ.H/l}h  
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package org.rut.util.algorithm.support; < *iFVjSI(  
hlyh8=Z6o  
import org.rut.util.algorithm.SortUtil; LGy6 2 y$  
~jKIuO/  
/** TH4f"h+B3"  
* @author treeroot t#M[w|5?  
* @since 2006-2-2 ';.TQ_I7Y  
* @version 1.0 o$bQ-_B`  
*/ Y]R=z*i%  
public class BubbleSort implements SortUtil.Sort{ 7]u_  
,FYA*}[  
/* (non-Javadoc) Q +hOW-  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CNuE9|W(vI  
*/ gz'{l[  
public void sort(int[] data) { xz@*V>QT  
int temp; )+ G0m,n  
for(int i=0;i for(int j=data.length-1;j>i;j--){ K&._fG  
if(data[j] SortUtil.swap(data,j,j-1); bg3kGt0  
} M97+YMY)  
} 49/2E@G4.  
} sfG9R"  
} LU*mR{B  
:zC=JvKT  
} MeV4s%*O+  
i{:?Iw 'ay  
选择排序: ^38k xwh  
9&kY>M>z0  
package org.rut.util.algorithm.support; n}%_H4t  
x2~fc  
import org.rut.util.algorithm.SortUtil; G|?V}pZ  
'lC=k7@x  
/** ( K-7z  
* @author treeroot o}36bi{  
* @since 2006-2-2 z 4. |N  
* @version 1.0 tm34Z''.>  
*/ mFpj@=^_G  
public class SelectionSort implements SortUtil.Sort { y54RD/`-  
-[=@'N P  
/* LUx'Dm"  
* (non-Javadoc) %LdBO1D0  
* VKXB)-'L  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) " d~M \Az  
*/  r+]a  
public void sort(int[] data) { BR6HD7G  
int temp; t- //.  
for (int i = 0; i < data.length; i++) { Zjc/GO  
int lowIndex = i; $ ga,$G  
for (int j = data.length - 1; j > i; j--) { 2Sy:wt  
if (data[j] < data[lowIndex]) { D_f :D^  
lowIndex = j; K=sk1<>)m  
} M;-FW5O't  
} Oa5-^&I  
SortUtil.swap(data,i,lowIndex); 6jal5<H  
} Q Na*Y@i  
} R8% u9o  
}/xdHt  
} k3 '5Ei  
1{xkAy0  
Shell排序: odeO(zuU  
~8Ef`zL  
package org.rut.util.algorithm.support; ,E(M<n|.  
wGz_IL.D  
import org.rut.util.algorithm.SortUtil; w@N)Pu  
$iy(+}  
/** 6>d 3*   
* @author treeroot '~6l 6wi  
* @since 2006-2-2 SZgan  
* @version 1.0 ^3&-!<*  
*/ tN)Vpb\J  
public class ShellSort implements SortUtil.Sort{ ' #r^W2  
a- /p/ I-%  
/* (non-Javadoc) G)5Uiu:^X  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /X\:3P  
*/ H,fVF837  
public void sort(int[] data) { 8/9YR(H3H  
for(int i=data.length/2;i>2;i/=2){ Yj>\WH  
for(int j=0;j insertSort(data,j,i); FZ% WD@=  
} <dY{@Cgw=  
} :)Nk  
insertSort(data,0,1); t1l4mdp  
} Gm\jboef]  
zt )WX9  
/** vns Mh  
* @param data n{F&GE="  
* @param j 4,6?sTuX  
* @param i 0?g&<q  
*/ Sj'.)nz>  
private void insertSort(int[] data, int start, int inc) { $)O\i^T  
int temp; 49#?I:l  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); 41XXL$  
} wB*}XJah  
} P6ugbq[x#e  
} SQ`ec95',  
6}mSA@4&  
} 6<Zk%[7t  
L: _pJP  
快速排序: H,1I z@W1  
6[1lK8o  
package org.rut.util.algorithm.support; 0Szt^l7  
^W,x  
import org.rut.util.algorithm.SortUtil; kh*td(pfP9  
FwSV \N+#'  
/** QtqE&j  
* @author treeroot  2Y9@[  
* @since 2006-2-2 SL% Ec%9Y  
* @version 1.0 D|5Fo'O^AV  
*/ r%oXO]X  
public class QuickSort implements SortUtil.Sort{ k{C|{m  
)0@&pEObm  
/* (non-Javadoc) w3oe.hWP3N  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9O#?r82  
*/ Ru`7Xd.  
public void sort(int[] data) { oO,"B8a  
quickSort(data,0,data.length-1); w 259':  
} & MfnH  
private void quickSort(int[] data,int i,int j){ P0szY"}  
int pivotIndex=(i+j)/2; "CWqPcr  
file://swap T`^LWc"  
SortUtil.swap(data,pivotIndex,j); IQ}YF]I;  
F|W(_llfM  
int k=partition(data,i-1,j,data[j]); NIOWjhi[Jn  
SortUtil.swap(data,k,j); 4}=Z+tDu>  
if((k-i)>1) quickSort(data,i,k-1); d[Rs  
if((j-k)>1) quickSort(data,k+1,j); h`p9H2}0  
q"^T}d d,  
} V}"w8i+D?  
/**  *}`D2_uP  
* @param data TYr"yZ([  
* @param i fyt`$y_E[  
* @param j N]@e7P'9F  
* @return 'WQ<|(:{  
*/ |-k~Fa  
private int partition(int[] data, int l, int r,int pivot) { EPwM+#|e-  
do{ !F*CEcB  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); DC%H(2  
SortUtil.swap(data,l,r); +aIy':P  
} >5=uq _QY  
while(l SortUtil.swap(data,l,r); wrt^0n'r)c  
return l; erZ%C <  
} 3P2L phW  
g JMv  
} VYN1^Tp  
e$@azi1  
改进后的快速排序: t12 xPtN1  
o.H(&ex|  
package org.rut.util.algorithm.support; Gj([S17\0:  
CpF&Vy K  
import org.rut.util.algorithm.SortUtil; S~LT Lv:>  
o5eFLJ6  
/** Nl`8Kcv  
* @author treeroot E; Z1HF R  
* @since 2006-2-2 @#5PPXp  
* @version 1.0 u~a@:D/F{G  
*/ HGRH9W  
public class ImprovedQuickSort implements SortUtil.Sort { 6*H F`@(  
`JL&x|q o  
private static int MAX_STACK_SIZE=4096; |F#L{=B  
private static int THRESHOLD=10; ; X3bgA']  
/* (non-Javadoc) G_a//[p  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m`lsUN,  
*/ Z}'"c9oB  
public void sort(int[] data) { BAS3&fA  
int[] stack=new int[MAX_STACK_SIZE]; i^'Uod0d.  
j8Csnm0  
int top=-1; #/ Qe7:l  
int pivot; ~'l.g^p bv  
int pivotIndex,l,r; *b0f)y3RV  
P*;zDQy  
stack[++top]=0; Xz, sL  
stack[++top]=data.length-1; +b]+5!  
<+c6CM$#}V  
while(top>0){ 7&z`N^dz{  
int j=stack[top--]; "ewB4F[  
int i=stack[top--]; q9&d24|  
kdry a  
pivotIndex=(i+j)/2; M%8:  
pivot=data[pivotIndex]; h0fbc;l  
GM<r{6Qy  
SortUtil.swap(data,pivotIndex,j); &<sN( ;%0R  
Q@lJ|  
file://partition 7 n=fB#!*3  
l=i-1; ( nH3  
r=j; U0:tE>3`  
do{ 2x7%6'  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); m mj6YQ0a  
SortUtil.swap(data,l,r); ES#K'Lf  
} }TCOm_Y/qL  
while(l SortUtil.swap(data,l,r); E|Lv_4lb=  
SortUtil.swap(data,l,j); `<L6Q2Y>j  
{ +%S{=j  
if((l-i)>THRESHOLD){ 5'Fh_TXTD  
stack[++top]=i; !Z6GID})p  
stack[++top]=l-1; :!f1|h  
} W|FPj^*t  
if((j-l)>THRESHOLD){ L@{5:#-  
stack[++top]=l+1; g2<xr;<t^  
stack[++top]=j; Px)/`'D  
} xv{iWJcs  
m_z1|zM}o  
}  ? h$>7|  
file://new InsertSort().sort(data); 7QlA/iKqK  
insertSort(data); 5!PU+9Kh  
} F*_mHYa;  
/** H[{ch t h  
* @param data <eq93  
*/ IRZ?'Im  
private void insertSort(int[] data) { ;?9u#FRtw  
int temp; p&L`C |0  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); hfGA7P"  
} <,Zk9 t&  
} V}>0r+NL<  
} `~"l a>}  
"yI)F~A  
} '%>$\Lv  
Q b5AQf30  
归并排序: PQ2u R  
*HwTq[y  
package org.rut.util.algorithm.support; IdlW[h3`[  
m3k}Q3&6Z  
import org.rut.util.algorithm.SortUtil; \7}X^]UVx  
#isBE}sT{  
/** * SG0-_S  
* @author treeroot 7ST[XLwt%}  
* @since 2006-2-2 TCSm#?[B  
* @version 1.0 m(Cn'@i`"0  
*/ ]~z2s;J{/  
public class MergeSort implements SortUtil.Sort{ Z50]g  
EV@xUq!x .  
/* (non-Javadoc) V$wf;v0d(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?.:C+*+  
*/ 3`&2 -  
public void sort(int[] data) { iaq0\d.[7  
int[] temp=new int[data.length]; cvbv\G'aT  
mergeSort(data,temp,0,data.length-1); $b#"Rv  
} h!f7/) |[o  
j+n1k^jC  
private void mergeSort(int[] data,int[] temp,int l,int r){ 7:1c5F~M  
int mid=(l+r)/2; EY(@R2~#J  
if(l==r) return ; 9 z,?DBMvc  
mergeSort(data,temp,l,mid); <dzE5]%\  
mergeSort(data,temp,mid+1,r); C,w$)x5kls  
for(int i=l;i<=r;i++){ ztG_::QtG]  
temp=data; DB yRP-TH  
} +>oVc\$  
int i1=l; aT#R#7<Eg  
int i2=mid+1; 5w`v 3o  
for(int cur=l;cur<=r;cur++){ !V.'~xj  
if(i1==mid+1) S)GWr"m-  
data[cur]=temp[i2++]; f4zd(J  
else if(i2>r) =@m|g )  
data[cur]=temp[i1++]; .h^."+TJ  
else if(temp[i1] data[cur]=temp[i1++]; -O_5OT4  
else Od'!v&  
data[cur]=temp[i2++]; ?0+D1w  
} er}/~@JJ  
} 1dOVH7  
4ow)vS(  
} :JSOj@s  
m5sgcxt/  
改进后的归并排序: +GWeu0b(~  
-lyT8qZ:(  
package org.rut.util.algorithm.support; 4.7ePbk[E  
S"w$#"EJA  
import org.rut.util.algorithm.SortUtil; Warz"n]iC  
fAfsKO*  
/** PK u+$  
* @author treeroot 5>7ECe*  
* @since 2006-2-2 (?&X<=|"  
* @version 1.0 u(?  
*/ 8p7Uvn+m*  
public class ImprovedMergeSort implements SortUtil.Sort { Xi5ZQo!t  
Tc@r#!.m  
private static final int THRESHOLD = 10; {3C~cK{  
bzmT.!  
/* HW{osav9  
* (non-Javadoc) LN?f w  
* )k3zOKZ;  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K!k,]90Ko  
*/ JcZs\ fl9  
public void sort(int[] data) { mz[rB|v"/7  
int[] temp=new int[data.length]; w/N.#s^  
mergeSort(data,temp,0,data.length-1); G;FY2;adK  
} q?&vV`PG5  
W z3y+I/&  
private void mergeSort(int[] data, int[] temp, int l, int r) { 'uBW1,  
int i, j, k; L!DP*XDp  
int mid = (l + r) / 2; ?DkMzR)u  
if (l == r) eQno]$-\  
return; \no[>L]  
if ((mid - l) >= THRESHOLD) 'rU [V+  
mergeSort(data, temp, l, mid); y-{^L`%Mk  
else GLt#]I"LY  
insertSort(data, l, mid - l + 1); j"/i+r{"E  
if ((r - mid) > THRESHOLD) N>7INK  
mergeSort(data, temp, mid + 1, r); yuk64o2QE  
else a>Uk<#>2?a  
insertSort(data, mid + 1, r - mid); 6.2_UN^<  
d)(61  
for (i = l; i <= mid; i++) { :Cw|BX@??U  
temp = data; nvxftbfE^D  
} N9Yc\?_NU_  
for (j = 1; j <= r - mid; j++) { JMpjiB,A}  
temp[r - j + 1] = data[j + mid]; +%8c8]2  
} $)mE"4FE  
int a = temp[l]; 8\`]T%h  
int b = temp[r]; 4)-LlYS_d<  
for (i = l, j = r, k = l; k <= r; k++) { ;p/RS#  
if (a < b) { G1vWHa7n;f  
data[k] = temp[i++]; 91r#lDR  
a = temp; R|ViLty  
} else { Tv3Bej  
data[k] = temp[j--]; F>)u<f,C  
b = temp[j]; WtFv"$V  
} $Dd IY}  
} s<xD$K~rM  
} Wj/.rG&tE  
$k V^[  
/** KDuM;  
* @param data "N"9PTX  
* @param l S-npJh 6  
* @param i G{i}z^n  
*/ & p"ks8"  
private void insertSort(int[] data, int start, int len) { WL7R.!P  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6?Rm>+2>v  
} 'u{m37ZJ  
} uY,&lX+!  
} m]+g[L?-  
} Xp{+){Iu  
,Zb]3  
堆排序: S>aN#  
ioIUIp+B~u  
package org.rut.util.algorithm.support; Z'>Xn^  
WsTbqR)W%  
import org.rut.util.algorithm.SortUtil; ?7'uo$  
d90B15]gv  
/** M&~3fRb 4  
* @author treeroot =E8lpN'  
* @since 2006-2-2 g9H~\w  
* @version 1.0 vdYd~>w  
*/ {%'(IJ|5z  
public class HeapSort implements SortUtil.Sort{ ]YQlCx`  
r Ka7[/  
/* (non-Javadoc) x1]^].#Eo  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lq}=&)%C  
*/ +iir]"8  
public void sort(int[] data) { vX]\Jqy  
MaxHeap h=new MaxHeap(); SgHLs  
h.init(data); =K=FzV'_~  
for(int i=0;i h.remove(); 0iinr:=u  
System.arraycopy(h.queue,1,data,0,data.length); T/V8&'^i  
} gd R wh  
^TJn&k  
private static class MaxHeap{ YW}q@AY7  
;+g p#&i`  
void init(int[] data){ [iwn"e  
this.queue=new int[data.length+1]; [bIdhG  
for(int i=0;i queue[++size]=data; M])Y|}wv8  
fixUp(size); ((\s4-   
} 81fpeoNO  
} G%  
En&ESW N  
private int size=0; <YP>c  
scCOiK)  
private int[] queue; p)N=  
FRQ0tIp  
public int get() { G,e>dp_cPu  
return queue[1]; EkgS*q_  
} <- Q=h?D  
FylL7n  
public void remove() { ( YF`#v6  
SortUtil.swap(queue,1,size--); 'xm_oGWE  
fixDown(1); SG2s!Ht  
} ~EG`[cv  
file://fixdown {O*WLZ{0  
private void fixDown(int k) { "GEJ9_a[  
int j; )C5<puh  
while ((j = k << 1) <= size) { m:59f9WXA  
if (j < size %26amp;%26amp; queue[j] j++; :D8V*F6P  
if (queue[k]>queue[j]) file://不用交换 ='q:Io?T  
break; 2i;G3"\  
SortUtil.swap(queue,j,k); |G~LJsXW!v  
k = j; UJ 1iXV[h"  
} hW$B;  
} V~tq _  
private void fixUp(int k) { 1hw1AJ}(F  
while (k > 1) { aB;syl{  
int j = k >> 1; Q>] iRx>MZ  
if (queue[j]>queue[k]) {1;j1|CI  
break; .i>; ?(GH  
SortUtil.swap(queue,j,k); s"#JBw\7  
k = j; O6NgI2[O  
} 8rAOs\ys  
} ^6bU4bA  
8bLA6qmM\  
} cu5Yvp  
"jH=O(37  
} "G-} wt+P  
\/g.`Pe  
SortUtil: o_p#sdt"  
S H2|xn  
package org.rut.util.algorithm; r t@Jw]az  
fpJM)HU  
import org.rut.util.algorithm.support.BubbleSort; vyP3]+n  
import org.rut.util.algorithm.support.HeapSort; w>>)3:Ytd  
import org.rut.util.algorithm.support.ImprovedMergeSort; dR<sBYo  
import org.rut.util.algorithm.support.ImprovedQuickSort; EYtf>D  
import org.rut.util.algorithm.support.InsertSort; w$WN` =  
import org.rut.util.algorithm.support.MergeSort; 9"Oz-!Y4  
import org.rut.util.algorithm.support.QuickSort; >j5) MF{"  
import org.rut.util.algorithm.support.SelectionSort; x*Y&s<  
import org.rut.util.algorithm.support.ShellSort; 1{i)7 :Y  
HpSmB[WF  
/** o?$kcI4  
* @author treeroot ]ppi962Z  
* @since 2006-2-2 +dw$IMwb  
* @version 1.0 tfW/Mf  
*/ kRo dC(f @  
public class SortUtil { 4NT zK  
public final static int INSERT = 1; OvqCuX  
public final static int BUBBLE = 2; CB{% ~  
public final static int SELECTION = 3; ~s{yh-B  
public final static int SHELL = 4; ^m.QW*  
public final static int QUICK = 5; WeNx9+2=Z  
public final static int IMPROVED_QUICK = 6; s+&Ts|c#  
public final static int MERGE = 7; :Fz;nG-G  
public final static int IMPROVED_MERGE = 8; ?piv]Z  
public final static int HEAP = 9; Ca?5bCI,  
M9'Qs m  
public static void sort(int[] data) { SIv8EMGo  
sort(data, IMPROVED_QUICK); "jqC3$DKI  
} ^-?5=\`5  
private static String[] name={ S=H<5*]g  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ++n"` ]o,  
}; 6nqG;z-IXJ  
,#3u. =IR[  
private static Sort[] impl=new Sort[]{ {WQH  
new InsertSort(), P0NGjS|Z{  
new BubbleSort(), _PD RUJ  
new SelectionSort(), X]ow5{e  
new ShellSort(), Dnn$-W|NC  
new QuickSort(), gKy@$at&  
new ImprovedQuickSort(), JRt^YX  
new MergeSort(), v-M3/*  
new ImprovedMergeSort(), bfy `UZr  
new HeapSort() ngJi;9X8*t  
}; >=Hm2daN  
6REv(E]  
public static String toString(int algorithm){ W`_pjld  
return name[algorithm-1]; qD=o;:~Km  
} NfvvwG;M  
=67dpQ'y  
public static void sort(int[] data, int algorithm) { |g<1n  
impl[algorithm-1].sort(data); }#}IR5`=E  
} M\O6~UFq!  
Tap=K|b ]  
public static interface Sort { AoB~ZWq  
public void sort(int[] data); jiQJ{yY  
} XDs )  
1T:M?N8J  
public static void swap(int[] data, int i, int j) { \?uaHX`1  
int temp = data; "D0:Y(\  
data = data[j]; dzJ\+ @4  
data[j] = temp; CA%p^4Q  
} 8Q&.S)hrN  
} !T;*F%G9  
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