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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。 C 2FewsRz  
插入排序: :rwF5  
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package org.rut.util.algorithm.support; Z&YW9de@  
jFnq{L t  
import org.rut.util.algorithm.SortUtil; 9V("K  
/** ~- JkuRJ\  
* @author treeroot 'Aai.PE:  
* @since 2006-2-2 t<x0?vfD  
* @version 1.0 K@`F*^A}V  
*/ @ScH"I];uA  
public class InsertSort implements SortUtil.Sort{ b?qtTce  
1+v)#Wj  
/* (non-Javadoc) 7>v1w:cC]  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -bduB@#2d  
*/ W|; .G9  
public void sort(int[] data) { vY:A7yGW  
int temp; h9RG?r1  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); vfm |?\  
} pzHN:9r  
} U!TFFkX[  
} ]xb R:CYJ  
(?D47^F &  
} b$H{|[  
1]m]b4]  
冒泡排序: M+9G^o)u  
o%5^dX&[  
package org.rut.util.algorithm.support; 2t*@P"e!  
"\U$aaF  
import org.rut.util.algorithm.SortUtil; o"J}@nF  
\XhzaM   
/** %Gv8 ]Yb  
* @author treeroot v 4DF #O  
* @since 2006-2-2 ZWxq<& Cg  
* @version 1.0 rhsSV3iM  
*/ Z@=#ry  
public class BubbleSort implements SortUtil.Sort{ CFkM}`v0  
*dL!)+:d  
/* (non-Javadoc) E_MGejm@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G(EiDo&  
*/ xm6cn\e  
public void sort(int[] data) { 8$BZbj%?hx  
int temp; ZV$qv=X  
for(int i=0;i for(int j=data.length-1;j>i;j--){ /9QI^6& SX  
if(data[j] SortUtil.swap(data,j,j-1); $ohIdpZLH2  
} 7lqj" o(  
} ;*[nZV>  
} 1Y_Cd  
} A90o X1l  
"(>P=  
} 7kp$C?7K  
]=m '| 0}  
选择排序: udMDE=1~L  
V \,Z (  
package org.rut.util.algorithm.support; _t_X`  
mvyqCOp 0  
import org.rut.util.algorithm.SortUtil; _jQ"_Ff  
4jfkCU  
/** 6V KsX+sd  
* @author treeroot }1f@>'o  
* @since 2006-2-2 _ko16wfg  
* @version 1.0 +'Ec)7m  
*/ }E+#*R3auB  
public class SelectionSort implements SortUtil.Sort { K1AI:$H  
G>qzAgA  
/* GNlP]9wX  
* (non-Javadoc) w(zlHj  
* S~.:B2=5K  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }Zu>?U  
*/ xv4_q-r[  
public void sort(int[] data) { lU`]yL  
int temp;  K!VIY|U  
for (int i = 0; i < data.length; i++) { _=Ed>2M)no  
int lowIndex = i; NjIe2)}'  
for (int j = data.length - 1; j > i; j--) { Z_.Eale^  
if (data[j] < data[lowIndex]) { gBA UrY%]  
lowIndex = j; 6hv4D`d;o  
} W2e~!:w  
} SQ9s  
SortUtil.swap(data,i,lowIndex); t9685s  
} tIR"y:U+  
} ( 6|S42  
XbsEO>_Z'A  
} {7LO|E}7  
jO)UK.H#  
Shell排序: &`[y]E'  
*4"s,1?@BG  
package org.rut.util.algorithm.support; M^JRHpTn  
d h#4/Wa,  
import org.rut.util.algorithm.SortUtil; rLw3\>y  
n7>CK?25  
/** j'Z}; 3y  
* @author treeroot eLXG _Qb"  
* @since 2006-2-2 U?P5 cN  
* @version 1.0 W 0%FZ0 l  
*/ rnz9TmN:*1  
public class ShellSort implements SortUtil.Sort{ - |n\  
|r[yMI|VR  
/* (non-Javadoc) :biM}L  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }u8o*P|,  
*/ ^tc2?T  
public void sort(int[] data) { 5}@6euT5$  
for(int i=data.length/2;i>2;i/=2){ ;+t~$5  
for(int j=0;j insertSort(data,j,i); ~$-Nl  
} 5RCZv\Wd&  
} qPY OO  
insertSort(data,0,1); f<bc8Lp  
} &rj3UF@hb  
}YH@T]O}  
/** !$P +hX`  
* @param data P#H|at  
* @param j (F@.o1No%  
* @param i 28>PmH]7  
*/ Ao~ZK[u  
private void insertSort(int[] data, int start, int inc) { Ch8w_Jf1yx  
int temp; zY6{ OP!#  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); R{uq8NA- W  
} 5|&8MGW-$  
} b37P[Q3  
} (,<&H;,8  
{-;lcOD  
} C50&SrnBU1  
oace!si  
快速排序: ZWH?=Bk:  
W&23M26"{  
package org.rut.util.algorithm.support; *T\- iICw  
0O+[z9  
import org.rut.util.algorithm.SortUtil; YcW[BMy5h  
gU1E6V-Jm  
/** -S5M>W.Qb{  
* @author treeroot vX|ZPn#  
* @since 2006-2-2 # ~SuL3  
* @version 1.0 R?@F%J;tx  
*/ *IL x-D5qr  
public class QuickSort implements SortUtil.Sort{ J`}5bnFP  
ZS[(r-)$F  
/* (non-Javadoc) k9H7(nS{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O]rAo  
*/ #n&/yYl9(l  
public void sort(int[] data) { 6z3 Yq{1  
quickSort(data,0,data.length-1); ma@3BiM  
} #Bq.'?c'~  
private void quickSort(int[] data,int i,int j){ .zxP,]"l  
int pivotIndex=(i+j)/2; aVsA5t\zi  
file://swap ip6$Z3[)  
SortUtil.swap(data,pivotIndex,j); RSEo'2  
" '/:Tp)  
int k=partition(data,i-1,j,data[j]); ljg2P5  
SortUtil.swap(data,k,j); ;O` \rP5w  
if((k-i)>1) quickSort(data,i,k-1); s *$Re)}S  
if((j-k)>1) quickSort(data,k+1,j); JRQ{Q"`)  
0ant0<  
} Fr/3Qp@S  
/** ? ->:,I=<~  
* @param data dm;H0v+Y'  
* @param i  Khd"  
* @param j (`h$+p^-y  
* @return *{/ ww9fT  
*/ v_-S#(  
private int partition(int[] data, int l, int r,int pivot) { wBlfQ w-N  
do{ {*WJ"9ujp]  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); '6U~|d  
SortUtil.swap(data,l,r); M, qX  
} ;4XvlcGo  
while(l SortUtil.swap(data,l,r); Bc%A aZ0x  
return l; )wkh  
} X :2%U  
"[(&$ I  
} py#`  
nd)Z0%xo  
改进后的快速排序: P&PPX#%  
{;.q?mj  
package org.rut.util.algorithm.support; ).aQ}G wx^  
h_Ky2IB$  
import org.rut.util.algorithm.SortUtil; ~&-8lD];LM  
0uX"KL]Elf  
/** R  Fgy  
* @author treeroot q;co53.+P)  
* @since 2006-2-2 a(}dF?M=  
* @version 1.0 vd>K=! J  
*/ |X&.+RI  
public class ImprovedQuickSort implements SortUtil.Sort { hT:+x3  
o!.\+[  
private static int MAX_STACK_SIZE=4096; Wr3j8"f/  
private static int THRESHOLD=10; fBCW/<Z  
/* (non-Javadoc) E({+2}=1  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u 6&<Bv  
*/ r(sQI# P  
public void sort(int[] data) { e.pm`%5bO  
int[] stack=new int[MAX_STACK_SIZE]; w`Q"mx*  
0Y rdu,c  
int top=-1; RiHOX&-7  
int pivot; Wn;B~  
int pivotIndex,l,r; q-c9YOz_  
Z9cg,#(D  
stack[++top]=0; h{zE;!+)D  
stack[++top]=data.length-1; /Mk85C79  
@**@W[EM  
while(top>0){ a& >(*PQ  
int j=stack[top--]; ua$H"(#c  
int i=stack[top--]; |,zcrOo]  
QmQsNcF~z  
pivotIndex=(i+j)/2; f8]Qn8  
pivot=data[pivotIndex]; ]y&w)-0  
aoNTRJ c$  
SortUtil.swap(data,pivotIndex,j); 2+KOUd&jS  
<~aQ_l  
file://partition  _@es9  
l=i-1; R Wa4O#  
r=j; ^/;W;C{4  
do{ HI}$Z =C  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); BR8W8nRb  
SortUtil.swap(data,l,r); $HjKELoJ<  
} ?Y6MC:l<  
while(l SortUtil.swap(data,l,r); om3$=  
SortUtil.swap(data,l,j); -rE_pV;  
} sTo,F$  
if((l-i)>THRESHOLD){ u<8 f ;C_  
stack[++top]=i; s|3@\9\  
stack[++top]=l-1; ]8,:E ]`O  
} B35zmFX|}N  
if((j-l)>THRESHOLD){ 9G8n'jWyY  
stack[++top]=l+1; cY/!z  
stack[++top]=j; jO'+r'2B9  
} 3/ sKRU  
x+~IXi>Ig  
} |12Cg>;j*n  
file://new InsertSort().sort(data); g@WGd(o0)  
insertSort(data); a`}b'X:  
} y/' ^r?  
/** -9BKa~ DVQ  
* @param data xw60l&s.\L  
*/ l!2hwRR  
private void insertSort(int[] data) { u3{gX{so  
int temp; Y-(),k_Q:  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); HV:mS*e  
} cv fh:~L  
} "BB#[@  
} 8+^?<FKa  
2u9^ )6/  
} y w"Tw  
!\{&^,y  
归并排序: 4Q0@\dR9  
X|.M9zIx  
package org.rut.util.algorithm.support; X1*6qd+E  
qw A N=3@  
import org.rut.util.algorithm.SortUtil; wn*z*  
x?Wt\<|h!  
/** UN`F|~@v  
* @author treeroot COS(pfC  
* @since 2006-2-2 mT N6-V  
* @version 1.0 g*UI~rp  
*/ $@_7HE3  
public class MergeSort implements SortUtil.Sort{ YJgw%UVJ5m  
JL~QE-pvD  
/* (non-Javadoc) b`Wn98s  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z-G|EAON"/  
*/  & y1' J  
public void sort(int[] data) { ?p{xt$<p  
int[] temp=new int[data.length]; \jn[kQ+pJ  
mergeSort(data,temp,0,data.length-1); <j1l&H|ux,  
} a,Gd\.D  
gi`K^L=C  
private void mergeSort(int[] data,int[] temp,int l,int r){ s:Us*i=H,  
int mid=(l+r)/2; yjvH)t/!.  
if(l==r) return ; Hfer\+RX  
mergeSort(data,temp,l,mid); ^G63GYh]y  
mergeSort(data,temp,mid+1,r); .%+`e  
for(int i=l;i<=r;i++){ xG<H${ k;  
temp=data; :"ZH  
} u>;#.N/  
int i1=l; dfB#+wh  
int i2=mid+1; T:0X-U  
for(int cur=l;cur<=r;cur++){ 2G"mm (   
if(i1==mid+1) gnbs^K w  
data[cur]=temp[i2++]; .vRLK  
else if(i2>r) &J|3uY,'j  
data[cur]=temp[i1++]; 3j.Ft*SV  
else if(temp[i1] data[cur]=temp[i1++]; 9GS<d.#Nvc  
else dN>XZv  
data[cur]=temp[i2++]; %8H*}@n  
} qF6YH  
} +3e(psdg  
kr7f<;rmJ  
} = PldXw0  
AqVTHyCu  
改进后的归并排序: [|UW_Bz  
iV#JJ-OBq  
package org.rut.util.algorithm.support; sm}q&m]ad  
{+f@7^/i.  
import org.rut.util.algorithm.SortUtil; Df;FOTTi%  
HzB&+c? Z  
/** 76[aOC2Ad  
* @author treeroot U{D ?1tF  
* @since 2006-2-2 dQ^>,(  
* @version 1.0 Uq)|]a&e  
*/ 3+m#v8h1  
public class ImprovedMergeSort implements SortUtil.Sort { q`09   
)8oI  s  
private static final int THRESHOLD = 10; wgSA6mQZ  
,_`\c7@  
/* ~Dr/+h:^\  
* (non-Javadoc) gcr,?rE<  
* zQ xZR}'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AO;`k]0e  
*/ ZZTPAmIr  
public void sort(int[] data) { _,b%t1v  
int[] temp=new int[data.length]; 7dX1.}M<(  
mergeSort(data,temp,0,data.length-1); _jef{j  
} zsI0Q47\  
9A\J*OU  
private void mergeSort(int[] data, int[] temp, int l, int r) { HKP\`KBC j  
int i, j, k; WX 79V  
int mid = (l + r) / 2; -$;H_B+.  
if (l == r) E?&dZR  
return; ,KkENp_  
if ((mid - l) >= THRESHOLD) c[<lr  
mergeSort(data, temp, l, mid); G5zZf ~r  
else D>c%5h  
insertSort(data, l, mid - l + 1); RrLQM!~  
if ((r - mid) > THRESHOLD) @okC":Fw,  
mergeSort(data, temp, mid + 1, r); }K;@$B6,@  
else xN2M| E]  
insertSort(data, mid + 1, r - mid); %xLziF  
 AO;+XP=  
for (i = l; i <= mid; i++) { *%ZfE,bu8<  
temp = data; 9`.b   
} ?C.C?h6F5B  
for (j = 1; j <= r - mid; j++) { "eI-Y`O,  
temp[r - j + 1] = data[j + mid]; 9R>A,x(  
} ]*juF[r(  
int a = temp[l]; S=[K/Kf-  
int b = temp[r]; 3w {4G<I  
for (i = l, j = r, k = l; k <= r; k++) { D.qbzJz  
if (a < b) { t>&$_CSWK  
data[k] = temp[i++]; <3HW!7Ad1  
a = temp; AyNl,Xyc4  
} else { [ $.oyjd  
data[k] = temp[j--]; FO3!tJ\L  
b = temp[j]; g_>)Q  
} +ls *04  
} BEPDyy  
} zfi{SO l  
R9S7p)B  
/** L4.yrA-]C%  
* @param data Yl8tjq}iC  
* @param l }E8 Y,;fTD  
* @param i I$qL=  
*/ a<!g*UVL0M  
private void insertSort(int[] data, int start, int len) { F8b*Mt}p  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `mw@"  
} Gpe h#Q4x  
} QHMXQyr(  
} ~DqNA%Mb  
} o1zc`Ibd  
K* [cJcY+  
堆排序: 6gakopZO  
'y-IE#!5  
package org.rut.util.algorithm.support; H W.S~eLw*  
qK|r+}g|&  
import org.rut.util.algorithm.SortUtil; A!iH g__/t  
gADt%K2 #Z  
/** $6fHY\i#R  
* @author treeroot _z,/!>J  
* @since 2006-2-2 Y0|~]J(B  
* @version 1.0 p4{?Rhb6  
*/ Z`b,0[rG[  
public class HeapSort implements SortUtil.Sort{ (jY.S|%  
+ 6r@HK`,t  
/* (non-Javadoc) (O&~*7D*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XFK$p^qu  
*/ \iowAo$  
public void sort(int[] data) { woR((K] #G  
MaxHeap h=new MaxHeap(); .s7/bF  
h.init(data); 3w{ i5gGn  
for(int i=0;i h.remove(); ( Y/ DMQ  
System.arraycopy(h.queue,1,data,0,data.length); ,iSs2&$ m  
} >Cd%tIie*  
q;kM eE*  
private static class MaxHeap{ u#J5M&#  
*WMcE$w/D  
void init(int[] data){ ?0'bf y]  
this.queue=new int[data.length+1]; |C>Yd*E,C  
for(int i=0;i queue[++size]=data; H7qda' %>  
fixUp(size); VJ_E]}H  
} 9Eg'=YJ  
} \8Blq5n-O*  
9=3V}]^M  
private int size=0; "]MF =-v  
;=h^"et  
private int[] queue; HLk}E*.mC  
&rw|fF|]  
public int get() { C:4h  
return queue[1]; Zls4@/\Q  
} ?r'b Z~  
fVf.u'.8  
public void remove() { lZn <v'y  
SortUtil.swap(queue,1,size--); jgEiemh&  
fixDown(1); [FyE{NfiJ%  
} w`#lLl B  
file://fixdown >-)i_C2  
private void fixDown(int k) { z)|56 F7'  
int j; r T* :1  
while ((j = k << 1) <= size) { []LNNO],X  
if (j < size %26amp;%26amp; queue[j] j++; *"9b?`E  
if (queue[k]>queue[j]) file://不用交换 m?<C\&)6x  
break; |dX#4Mq^,  
SortUtil.swap(queue,j,k); FpW{=4yk  
k = j; L]HY*e  
} @*%.V.  
} h+Dg"j<[  
private void fixUp(int k) { II~D66 bF  
while (k > 1) { >DbG$V<v'  
int j = k >> 1; ;Rwr5  
if (queue[j]>queue[k]) Z71"d"  
break; 3j.f3~"  
SortUtil.swap(queue,j,k); h ?p^DPo  
k = j; l'3NiIX  
} 2@e<II2ha8  
} eKStt|M'  
5vP*oD  
} cp.)K!$  
<'GI<Hc  
} u :m]-'  
+8BH%f}X  
SortUtil: ?'h@!F%R'  
=gfLl1wY[  
package org.rut.util.algorithm; U8< GD|  
&NGlkn  
import org.rut.util.algorithm.support.BubbleSort; @.CPZT  
import org.rut.util.algorithm.support.HeapSort; `86 9XE  
import org.rut.util.algorithm.support.ImprovedMergeSort; O 6A:0yM4  
import org.rut.util.algorithm.support.ImprovedQuickSort; 7Bmt^J5i&t  
import org.rut.util.algorithm.support.InsertSort; C'5i>;  
import org.rut.util.algorithm.support.MergeSort; :Z=A,G  
import org.rut.util.algorithm.support.QuickSort; vhhsOga  
import org.rut.util.algorithm.support.SelectionSort; uOW9FAW  
import org.rut.util.algorithm.support.ShellSort; umls=iz  
_/MKU!\l  
/** `7N[rs9|S  
* @author treeroot C@Wm+E~;8  
* @since 2006-2-2 ~Dkje  
* @version 1.0 \" .3x PkE  
*/ a_x|PbD  
public class SortUtil { RqcX_x(p  
public final static int INSERT = 1; gCwg ;c-  
public final static int BUBBLE = 2; :5CwRg  
public final static int SELECTION = 3; *AxKV5[H  
public final static int SHELL = 4; \:" s*-  
public final static int QUICK = 5; Sf*VkH  
public final static int IMPROVED_QUICK = 6; ,VHvQU  
public final static int MERGE = 7; 5RlJybN"o  
public final static int IMPROVED_MERGE = 8; c]xpp;%]  
public final static int HEAP = 9; KgKV(q=  
o'D6lkf0  
public static void sort(int[] data) { 0V`/oaW;  
sort(data, IMPROVED_QUICK); TH6g:YP`7  
} KUuwScb\  
private static String[] name={ k ( R  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -M[5K/[  
}; k`TEA?RfQ  
# <&=ZLN  
private static Sort[] impl=new Sort[]{ \ =83#*KK  
new InsertSort(), =2`s Uw}  
new BubbleSort(), ~'T]B{.+J  
new SelectionSort(), C(?lp  
new ShellSort(), `9 $?g|rB  
new QuickSort(), K<|eZhp~  
new ImprovedQuickSort(), *M KVm)Iv  
new MergeSort(), {d7KJmN  
new ImprovedMergeSort(), 0HG*KW  
new HeapSort() e@X~F6nP  
}; O'5(L9,  
B V Pf8!-  
public static String toString(int algorithm){ KQr=;O\T  
return name[algorithm-1]; 5(U.<  
} \6@}HFH  
<cWo]T`X!  
public static void sort(int[] data, int algorithm) {  '5[L []A  
impl[algorithm-1].sort(data); ^s24f?3  
} Iem* 'r  
N 4,w  
public static interface Sort { u2U@Qrs2  
public void sort(int[] data); fT'A{&h|U  
} 9$d (`-&9p  
AY *  
public static void swap(int[] data, int i, int j) { QR^pu.k@  
int temp = data; -G*u2i_*  
data = data[j]; =@ON>SmPs  
data[j] = temp; )ns;S  
} qLPI^g,  
} Uvz9x"0[u  
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