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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。 i"0^Gr  
插入排序: *q=pv8&*s  
t*NZ@)>  
package org.rut.util.algorithm.support; w;&J._J  
}NMA($@A  
import org.rut.util.algorithm.SortUtil; DJS0;!# |O  
/** pTprU)sa7  
* @author treeroot 2h IM!wQ  
* @since 2006-2-2 Uk` ym  
* @version 1.0 i 'H{cN6  
*/ {SY@7G]  
public class InsertSort implements SortUtil.Sort{ /[q6"R!uMz  
z{]$WVs:^  
/* (non-Javadoc) CJ8XKy  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =$X5O&E3'  
*/ lr=? &>MXj  
public void sort(int[] data) { $k,Z)2  
int temp; Ckj2$c~  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); g1@zk $  
} o:.={)rX  
} 5@ %$M$E  
} MT [V1I{LV  
IGV@tI  
} Nv,1F  
^vn8s~#  
冒泡排序: yS[:C 2v  
0BMKwZg  
package org.rut.util.algorithm.support;  s X.L  
EeIV6ug  
import org.rut.util.algorithm.SortUtil; W-qec  
"T=Z/@Vy  
/**  "_eHK#)  
* @author treeroot E/v.+m  
* @since 2006-2-2 <4ccTl  
* @version 1.0 ` .|JTm[  
*/ [a:yKJ[  
public class BubbleSort implements SortUtil.Sort{ uUB,OmLN  
v*Ds:1"H-I  
/* (non-Javadoc) 4w\ r `@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?3D|{  
*/ d&BocJ  
public void sort(int[] data) { qsOA(+ZP  
int temp; JR8 b[Oj.S  
for(int i=0;i for(int j=data.length-1;j>i;j--){ wN>k&J  
if(data[j] SortUtil.swap(data,j,j-1); k |k  
} [CL.Xil=  
} Hbu8gqu  
} m2F2  
} ![h+ R@_(  
pM],-7UM  
} 'r~,~A I  
IFcxyp  
选择排序: 8n+&tBq1  
\3JZ =/  
package org.rut.util.algorithm.support; m \o<a|  
%X7R_>.   
import org.rut.util.algorithm.SortUtil; Y~gDS^8  
d[E~}Dq3#  
/** }Qyuy~-&^  
* @author treeroot ~P8 6=Vw  
* @since 2006-2-2 4QC"|<9R  
* @version 1.0 >L\$  
*/ F0:|uC4  
public class SelectionSort implements SortUtil.Sort { $\M<gW6  
 J@sH(S  
/* 6_]-&&Nr  
* (non-Javadoc) 4Vl_vTz{i  
* sL" h  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @ol=gBU  
*/ 2l]*><q|  
public void sort(int[] data) { t5t,(^;f  
int temp; I,TJV)B  
for (int i = 0; i < data.length; i++) { ,cZhkXd  
int lowIndex = i; l/1u>'  
for (int j = data.length - 1; j > i; j--) { GKT2x '(e  
if (data[j] < data[lowIndex]) { ~A@T_ *0  
lowIndex = j; cq lA"Eof  
} G&=4@pLY5  
} ,)/gy)~#  
SortUtil.swap(data,i,lowIndex); (3cJ8o>&  
} x93h{K f  
} Zk,` Iq  
kt`_n+G  
} BIGln`;,f  
Tzr_K  
Shell排序: p7et>;WRx  
=1Nz* c  
package org.rut.util.algorithm.support;  lS@0 $  
MDV<[${   
import org.rut.util.algorithm.SortUtil; ?YE'J~0A6  
nhV\<  
/** KuBN_bd  
* @author treeroot >QyJRMY  
* @since 2006-2-2 21NGsG  
* @version 1.0 paKur%2u  
*/ ?tzJ7PJ~B  
public class ShellSort implements SortUtil.Sort{ be?>C 5  
0lpkG ="&r  
/* (non-Javadoc) A*+pGQ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mj{B_3b5  
*/ mJ+M|#Ox  
public void sort(int[] data) { pH&*5=t}  
for(int i=data.length/2;i>2;i/=2){ T_t5Tg~i[N  
for(int j=0;j insertSort(data,j,i); aQ!QrTua-  
} -R %T Dx  
} 9mE6Cp.Wv  
insertSort(data,0,1); =MR.*m{  
} MoAie|MKe  
1oKF-";u(  
/** .8o?`  
* @param data *vy^=Yea  
* @param j Ov$>CA  
* @param i /x%h@Cn!  
*/ %MG{KG=&o  
private void insertSort(int[] data, int start, int inc) { E_q/*}]pE  
int temp; `wI$  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); jej.!f:H  
} MzEeDN  
} YnR8mVo5Q  
} q+iG:B/Z  
^}SP,lg'  
} 4X-"yQ<U  
CdBpz/  
快速排序: Vz.G!*>Dg  
_V2^0CZ  
package org.rut.util.algorithm.support; Eep~3U  
%x'}aTa  
import org.rut.util.algorithm.SortUtil; m:}PVJ-"  
Ky0}phGRu  
/** sKy3('5;  
* @author treeroot <OH{7>V  
* @since 2006-2-2 _0cCTQE  
* @version 1.0 e{Q;,jsh  
*/ ai7R@~O:_k  
public class QuickSort implements SortUtil.Sort{ "D\>oFu  
- -fRhN>  
/* (non-Javadoc) 1d$qr`  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t1JU_P  
*/ sX@}4[)<&  
public void sort(int[] data) { (k^% j  
quickSort(data,0,data.length-1); p< Y-b,&  
} M)F_$ ICE-  
private void quickSort(int[] data,int i,int j){ c,2OICj  
int pivotIndex=(i+j)/2; tJG+k)EE  
file://swap g6 H}a  
SortUtil.swap(data,pivotIndex,j); mjQZ"h0  
3F?7oMNIh  
int k=partition(data,i-1,j,data[j]); z!M #   
SortUtil.swap(data,k,j); I4|LD/b  
if((k-i)>1) quickSort(data,i,k-1); ?gsPHPUS  
if((j-k)>1) quickSort(data,k+1,j); t$Bu<frQ  
q+znb'i-x  
} 8(Cs<C!  
/** /[=Yv!  
* @param data .@Lktc  
* @param i uTdx`>M,O  
* @param j yhkKakg,)  
* @return o;9 G{Xj3@  
*/ o)bKs>` U  
private int partition(int[] data, int l, int r,int pivot) { Y{Ff I+  
do{ 9u6VN]divB  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); f, '*f:(  
SortUtil.swap(data,l,r); cR{F|0X  
} ZEp>~dn;  
while(l SortUtil.swap(data,l,r); KE4#vKV0yC  
return l; *HsA.W~2W  
} 'fs tfk  
PNz]L  
}  bUsX~R-  
ur:8`+" (  
改进后的快速排序: {Rdh4ZKh  
4]HW!J  
package org.rut.util.algorithm.support; .L9g*q/}  
HUAbq }  
import org.rut.util.algorithm.SortUtil; 3(Ns1/;?,  
'3w%K+eJY  
/** 5hHLC7tT9  
* @author treeroot #bJp)&LO  
* @since 2006-2-2 .=)[S5.BVq  
* @version 1.0 abAw#XQ8  
*/ BbM/Rd1tAm  
public class ImprovedQuickSort implements SortUtil.Sort { 1V wcJd  
 _!_^B  
private static int MAX_STACK_SIZE=4096; 'yosDT2{#  
private static int THRESHOLD=10; Hd\. ,2a"  
/* (non-Javadoc) C2aA])7 D  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) **\?-*c=U  
*/ TI}a$I*  
public void sort(int[] data) { dVPY07P  
int[] stack=new int[MAX_STACK_SIZE]; K.=5p/^a  
Ge @qvP_  
int top=-1; ^AShy`o^X  
int pivot; Z l;TS%$  
int pivotIndex,l,r; 1:iB1TclP  
[dR#!"6t  
stack[++top]=0; id588Y78  
stack[++top]=data.length-1; >=d 5Scix  
!PA><F  
while(top>0){ !7f,gvk  
int j=stack[top--]; mrq,kwM  
int i=stack[top--]; _s+G02/q1  
OkAgO3>Y/  
pivotIndex=(i+j)/2; ^D1gcI  
pivot=data[pivotIndex]; }$'XV.  
GKbbwT0T|  
SortUtil.swap(data,pivotIndex,j); ]61Si~Z  
_R(9O?;q  
file://partition ,J '_Vi  
l=i-1; .hM t:BMf*  
r=j; E]v]fy"  
do{ /N({"G'  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); ySB0"bl  
SortUtil.swap(data,l,r); c^O&A\+;  
} @eZBwFe  
while(l SortUtil.swap(data,l,r); qX`Hi9ja  
SortUtil.swap(data,l,j); }VRl L>HAC  
fJP *RVz  
if((l-i)>THRESHOLD){ |VzXcV-"8)  
stack[++top]=i; JQ;.+5 N<K  
stack[++top]=l-1; f~*7hv\  
} `dD_"Hdt  
if((j-l)>THRESHOLD){ A|,qjiEJCc  
stack[++top]=l+1; +~BP~  
stack[++top]=j; 7x=4P|(\}  
} 0l4f%'f  
>gs_Bzy]  
} &S`g&  
file://new InsertSort().sort(data); 3A{)C_1a  
insertSort(data); Zwz co  
} |d z2Drc  
/** 0WfnX>(C7R  
* @param data eM 5#L,Y{  
*/ k$ T  
private void insertSort(int[] data) { ;X a N  
int temp; AAs&P+;  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); {NQCe0S+p  
} Mvue>)g~>  
} @e&0Wk  
} Zxd*%v;  
,v 2^Ui  
} %.D!J",\/K  
liG|#ny{  
归并排序:  sa&`CEa  
xkw=os  
package org.rut.util.algorithm.support; u}%6=V  
!Vg=l[  
import org.rut.util.algorithm.SortUtil; tHo|8c~ [  
K,JK9)T  
/** t,dm3+R  
* @author treeroot Ssuz%*  
* @since 2006-2-2 Xz)qtDN|(  
* @version 1.0 <5mv8'{L  
*/ u]7wd3(  
public class MergeSort implements SortUtil.Sort{ a??8)=0|}  
'.;{"G.@'  
/* (non-Javadoc) _~MX~M3MB  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wPm  
*/ |`Noj+T47I  
public void sort(int[] data) { \'<P~I&p  
int[] temp=new int[data.length]; t$~'$kM)<  
mergeSort(data,temp,0,data.length-1); /:Gy .  
} 'e' p`*  
7i{(,:  
private void mergeSort(int[] data,int[] temp,int l,int r){ *Ow2,{Nn  
int mid=(l+r)/2; W;cY g.W2  
if(l==r) return ; tk*-Cx?_  
mergeSort(data,temp,l,mid); +t%2V?  
mergeSort(data,temp,mid+1,r); ."=p\:^j*  
for(int i=l;i<=r;i++){ b>8TH-1t~  
temp=data; A6 .wXv,  
} $.kJBRgV*  
int i1=l; L-:@Om!  
int i2=mid+1; m2"e ]I  
for(int cur=l;cur<=r;cur++){ *!JB^5(H  
if(i1==mid+1) 09anQHa  
data[cur]=temp[i2++]; \>pm (gF  
else if(i2>r) Q K#wsw  
data[cur]=temp[i1++]; nw% 9Qw  
else if(temp[i1] data[cur]=temp[i1++]; p/RT*?<   
else 'Etq;^H  
data[cur]=temp[i2++]; (xN1?qXB.  
} Q!qD3<?5  
} *Cf!p\7!  
T@i* F M  
} NN=^4Xpc:  
23i2yT  
改进后的归并排序: KK3iui  
GF8wKx#J  
package org.rut.util.algorithm.support; YI;iG[T,&  
Hnk&2bY  
import org.rut.util.algorithm.SortUtil; aA52Li  
P_NF;v5 v  
/** ~gW^9nWYU  
* @author treeroot d)bsyZ;U  
* @since 2006-2-2 :>;F4gGVG  
* @version 1.0 r~h#  
*/ K)! ^NT  
public class ImprovedMergeSort implements SortUtil.Sort { R'zi#FeP  
.?Y"o3  
private static final int THRESHOLD = 10; *9$SFe|&n:  
.,p=e$x]  
/* #"rK1Z  
* (non-Javadoc) ~=iH*AQR  
* zD<W`_z  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <{bxOr+  
*/ Q2- lHn^L:  
public void sort(int[] data) { *j&)=8Y|   
int[] temp=new int[data.length]; Z:7eroZP  
mergeSort(data,temp,0,data.length-1); B+U:=591  
} WEe7\bWF  
+Tu?PuT7k  
private void mergeSort(int[] data, int[] temp, int l, int r) { Jj+Q2D:  
int i, j, k; -u'"l(n)~  
int mid = (l + r) / 2; T9w=k)  
if (l == r) rG6G~ |mS  
return; irD5;xk([  
if ((mid - l) >= THRESHOLD) l#1#3F  
mergeSort(data, temp, l, mid);  [. 9[?8  
else 1J/'R37lP  
insertSort(data, l, mid - l + 1); 2O[sRm)  
if ((r - mid) > THRESHOLD) =hFY-~U  
mergeSort(data, temp, mid + 1, r); $7DW-TA  
else "QNQ00[T`>  
insertSort(data, mid + 1, r - mid); w/ rQOHV{  
y42 Cg  
for (i = l; i <= mid; i++) { aMY@**^v  
temp = data; ~[t#$2d}  
} 3MNM<Ih  
for (j = 1; j <= r - mid; j++) { "W%YsN0  
temp[r - j + 1] = data[j + mid]; A| A#|D  
} wV==sV  
int a = temp[l]; C&H'?0Y@  
int b = temp[r]; Fy Ih\  
for (i = l, j = r, k = l; k <= r; k++) { J'|=J   
if (a < b) {  jb&MC 2  
data[k] = temp[i++]; s$hO/INr  
a = temp; v { >3)$1  
} else { JOY&YA$U  
data[k] = temp[j--]; U?:P7YWy  
b = temp[j]; Oa~ThbX7  
} *}lLV.+A  
} [QgP6f]=  
} } #H,oy;Dz  
!Z:XSF[T  
/** ^wd@mWxx  
* @param data mXp#6'a  
* @param l X'PZCg W  
* @param i S \]O8#OX  
*/ d7vPZ_j^z  
private void insertSort(int[] data, int start, int len) { I@ue eDY  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1);  'Y)aGH(  
} &=kv69v  
} 2@6@|jRG  
} `_OrBu[  
} 8A3/@Z;0S  
#\lvzMjCC  
堆排序: "x=\mA#`  
fF0i^E<  
package org.rut.util.algorithm.support; T3z ovnR  
]5f;Kz)  
import org.rut.util.algorithm.SortUtil; {V QGfN  
f_S$CFa@  
/** 6Bjo9,L  
* @author treeroot r9_ ON|  
* @since 2006-2-2 CZ3oX#b  
* @version 1.0 >z\IO  
*/ C(G.yd  
public class HeapSort implements SortUtil.Sort{ p!YK~cH[  
zx}+Q B0  
/* (non-Javadoc) !2Nk  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xjo`u:BH  
*/ )DXt_leLg  
public void sort(int[] data) { <3B^5p\/  
MaxHeap h=new MaxHeap(); kPs?  
h.init(data); KM?4J6jH  
for(int i=0;i h.remove(); Bgm8IK)6  
System.arraycopy(h.queue,1,data,0,data.length); a(A~S u97  
} /\/^= j  
QLO;D)fC  
private static class MaxHeap{ NLMvi!5w,  
,w#lUg p  
void init(int[] data){ R}0gIp=  
this.queue=new int[data.length+1]; `;6M|5G  
for(int i=0;i queue[++size]=data; ?CQE6ch  
fixUp(size); _ f%s]  
} /@ @F nQ++  
} ^~[7])}g6  
vzg^tJ  
private int size=0; Hloe7+5UD  
^}-l["u`  
private int[] queue; Qt+D ,X  
larv6ncV  
public int get() { Dz~0(  
return queue[1]; PF`uwx@zH  
} AfTm#-R  
Df4O~j$U"s  
public void remove() { &IUA[{o~e  
SortUtil.swap(queue,1,size--); ~][~aEat;V  
fixDown(1); 03fOm  
} / (BS<A  
file://fixdown kzZgNv#G;  
private void fixDown(int k) { `}),wBq  
int j; zVS{X=u  
while ((j = k << 1) <= size) { g9pKoi|\E  
if (j < size %26amp;%26amp; queue[j] j++; ]jhi"BM  
if (queue[k]>queue[j]) file://不用交换 I3nE]OcW@  
break; hH1Q:}a  
SortUtil.swap(queue,j,k); _s^tL2Pc  
k = j; l[T-Ak  
} )4ek!G]Rb  
} ]2@(^x'=  
private void fixUp(int k) { >`x|E-X"  
while (k > 1) { qIZ+%ZOu  
int j = k >> 1; pWRdI_  
if (queue[j]>queue[k]) 0vqH-)}  
break; y$R8J:5f  
SortUtil.swap(queue,j,k); 9A.NM+u7  
k = j; ]20:8l'  
} M +OVqTsFU  
} uQW)pD{_  
.:j{d}p}  
} q0+N#$g#  
o!BCR:  
} LLTr+@lj  
F-3=eKZ  
SortUtil: *1dZs~_  
W8g13oAu"  
package org.rut.util.algorithm; }'P|A  
uBww  
import org.rut.util.algorithm.support.BubbleSort; 4~Cf_`X}]  
import org.rut.util.algorithm.support.HeapSort; Jq` Dvz  
import org.rut.util.algorithm.support.ImprovedMergeSort; Gky*EY  
import org.rut.util.algorithm.support.ImprovedQuickSort; m-O*t$6  
import org.rut.util.algorithm.support.InsertSort; j_rO_m<8  
import org.rut.util.algorithm.support.MergeSort; %6cr4}Zm}  
import org.rut.util.algorithm.support.QuickSort; `C>h]H(  
import org.rut.util.algorithm.support.SelectionSort; pqO3(2F9  
import org.rut.util.algorithm.support.ShellSort; bDvGFSAH  
j>JBZ#g  
/** E^rBs2;9  
* @author treeroot bKS/T^UQ  
* @since 2006-2-2 EcHZ mf  
* @version 1.0 I'P|:XKI  
*/ _K9PA[m5 ~  
public class SortUtil { 3J"`mQ  
public final static int INSERT = 1; uN<=v&]q  
public final static int BUBBLE = 2; (>0`e8v!  
public final static int SELECTION = 3; KcV"<9rE  
public final static int SHELL = 4; z#Jw?K_  
public final static int QUICK = 5; l5w^rj  
public final static int IMPROVED_QUICK = 6; tQzbYzGb7  
public final static int MERGE = 7; @M\JzV4 A[  
public final static int IMPROVED_MERGE = 8; C,W@C  
public final static int HEAP = 9; c:K/0zY  
zdJPMNHg  
public static void sort(int[] data) { Nt8"6k_  
sort(data, IMPROVED_QUICK); \ *CXXp`  
} c_qox  
private static String[] name={ LkJq Bg  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 85# 3|5n  
}; -`q!mdA2  
LBG`DYR@  
private static Sort[] impl=new Sort[]{ z\tY A  
new InsertSort(), Q+Nnj(AQY  
new BubbleSort(), @~2k5pa  
new SelectionSort(), AIOGa<^  
new ShellSort(), @] .s^ss9_  
new QuickSort(), b$H bo;_   
new ImprovedQuickSort(), v>K|hH  
new MergeSort(), ;0WAfu}#H  
new ImprovedMergeSort(), <T7@,_T  
new HeapSort() S<]k0bC  
}; Ia](CN*;6  
c= 2E/x?  
public static String toString(int algorithm){ C3 "EZe[R  
return name[algorithm-1]; <IR@/b!,  
} qsp3G7\'=  
vh Oh3  
public static void sort(int[] data, int algorithm) { E~q3o*  
impl[algorithm-1].sort(data); EO+Ix7w  
} TQeIAy  
;VCV%=W<  
public static interface Sort { eW.qMx#:od  
public void sort(int[] data); z&!o1uq  
} JL_(%._J  
`GqF/?i  
public static void swap(int[] data, int i, int j) { XzV>q~I3|E  
int temp = data; hRuiuGC  
data = data[j]; !m\By%(  
data[j] = temp; u*l>)_HD  
} &S.p%Qe"  
} w#9.U7@.  
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