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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。 R).?lnS  
插入排序: |z!Y,zaX  
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package org.rut.util.algorithm.support; Xgge_`T9  
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import org.rut.util.algorithm.SortUtil; -/>SdR$D7  
/** 88)F-St  
* @author treeroot O<0G\sU  
* @since 2006-2-2 z9k3@\7  
* @version 1.0 rKR2v (c  
*/ Ut;, Z  
public class InsertSort implements SortUtil.Sort{ ".9 b}}  
6]=R#d 7U  
/* (non-Javadoc) ,qS-T'[v,(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hoaf3 `n  
*/ TNA?fm  
public void sort(int[] data) { 1 rr\l`  
int temp; t,mD{ENm&  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); (RP"VEVR  
} B?qLXRv  
} Jl-Lz03YG  
}  Pa .D+  
OC$Y8Ofr  
} l .8@F  
6dG:3n}  
冒泡排序: wzr3 y}fCe  
u? a*bW  
package org.rut.util.algorithm.support; JmJ8s hq  
N|n"JKw)  
import org.rut.util.algorithm.SortUtil; ,4bqjkX5q  
"T`Q,  
/** vZHm'  
* @author treeroot de?Bn+mvi.  
* @since 2006-2-2 oT5 N_\  
* @version 1.0 cxBu2( Y  
*/ os<B}D[  
public class BubbleSort implements SortUtil.Sort{ @z8,XW }  
wHSas[4k  
/* (non-Javadoc) RR u1/nam  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1LbJR'}  
*/ /bE=]nM  
public void sort(int[] data) { }H!l@  
int temp; T}ZUw;}BL  
for(int i=0;i for(int j=data.length-1;j>i;j--){ i1qhe?5  
if(data[j] SortUtil.swap(data,j,j-1); 1}A1P&2>  
} ?U~9d"2=  
} ;(cq aB  
} ,&Iw5E[  
} l.r i ]e  
`'Fz :i  
} ?0>% a$`  
S]kY'(V(*  
选择排序: <r_L-  
yF &"'L  
package org.rut.util.algorithm.support; Nr\[|||%  
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import org.rut.util.algorithm.SortUtil; VCzmTnD  
EgAM,\  
/** fVlTsc|e  
* @author treeroot 7!0~sf9A  
* @since 2006-2-2 g5gq {KlU  
* @version 1.0 iXp*G52  
*/ j[z o~Y4z  
public class SelectionSort implements SortUtil.Sort { ~J}{'l1{yf  
eyq8wQT  
/* W 7k\j&x  
* (non-Javadoc) y\]~S2}G  
* (Ev/R%Z  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wAC*D=Qj  
*/ $Hr qX?&r  
public void sort(int[] data) { Rf)lFi  
int temp; *.X!AJ;M=O  
for (int i = 0; i < data.length; i++) { :"Vfn:Q  
int lowIndex = i;  jpc bW  
for (int j = data.length - 1; j > i; j--) { YK[PC]w  
if (data[j] < data[lowIndex]) { Q/oel'O*x  
lowIndex = j; 3<ikMUq&  
} 7B@[`>5?%L  
} h rL_. 4  
SortUtil.swap(data,i,lowIndex); 8lAs~c  
} gOkq>i_  
} "PM!03rb  
!;";L5()  
} XG]ltSOy  
Q;]g9T[)  
Shell排序: S2/6VoGE  
8]!%mrS  
package org.rut.util.algorithm.support; r|U'2+vn  
@D<q=:k  
import org.rut.util.algorithm.SortUtil; l+e L:C!  
S+03aJNN#  
/** g3r4>SA  
* @author treeroot ~NYy@l   
* @since 2006-2-2 bo]xah|."j  
* @version 1.0 #/u%sX`#y  
*/ &/K:zWk3mx  
public class ShellSort implements SortUtil.Sort{ 7X \azL  
}co v"o  
/* (non-Javadoc) }}AooziH9  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) II !Nr{A  
*/ >j [> 0D  
public void sort(int[] data) { 5,3Yt~\m  
for(int i=data.length/2;i>2;i/=2){ Ij+ E/V  
for(int j=0;j insertSort(data,j,i); ~&>|u5C*@  
} Rj&V~or  
} ]JQ';%dne  
insertSort(data,0,1); 2hOr#I$/  
} H5@N<v5 u  
(DzV3/+p^  
/** iOCx7j{BS  
* @param data *XRAM.  
* @param j h,:8TMJRRN  
* @param i 7_,)"J2^  
*/ "c[ D 0{\{  
private void insertSort(int[] data, int start, int inc) { 9$-V/7@)  
int temp; >EQd;Af  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); @ lo6?9oNo  
} 4a'GWzUtS  
} h?f)Bt}ry  
} vWbf5?  
j7&57'  
} ![ & go  
bERYC|  
快速排序: NXQdyg,  
y:TLGQ0  
package org.rut.util.algorithm.support; JTH8vk:@  
Jvysvi{8  
import org.rut.util.algorithm.SortUtil; %G~ f>  
q&.SB`  
/** =c{ / Z  
* @author treeroot ^4Ta0kDn  
* @since 2006-2-2 D8u_Z<6IjI  
* @version 1.0 V~rF`1+5N  
*/ 01md@4NQ  
public class QuickSort implements SortUtil.Sort{ ?n$;l-m[  
Vz$X0C=W;H  
/* (non-Javadoc) ifA{E}fRZP  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zj )Bd* a  
*/ KMsm2~P  
public void sort(int[] data) { hhu !'(j  
quickSort(data,0,data.length-1); Isa]5>  
} :Oz! M&Ov  
private void quickSort(int[] data,int i,int j){ -rYOx9P4  
int pivotIndex=(i+j)/2; P4vW.|@  
file://swap [[{y?-U  
SortUtil.swap(data,pivotIndex,j); H-gq0+,yE  
JFw<Po,MEa  
int k=partition(data,i-1,j,data[j]); k_)H$*  
SortUtil.swap(data,k,j); bL`O k  
if((k-i)>1) quickSort(data,i,k-1); p 4k*vuu>  
if((j-k)>1) quickSort(data,k+1,j); ISy\g`d`C  
(h NSzG\  
} _<?lP$Xr  
/** wgm?lfX<  
* @param data mT8")J|2  
* @param i :Gyv%> .  
* @param j ^P&)2m:s  
* @return Z!Y ^iN  
*/ QO;W}c:N  
private int partition(int[] data, int l, int r,int pivot) { V\nQHzjF<6  
do{ -3 }  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); cwK 6$Ax  
SortUtil.swap(data,l,r); @pueM+(L&  
} b"-eQb  
while(l SortUtil.swap(data,l,r); !(=bH"P  
return l; b[<Q_7~2  
} v#EXlpS  
pVTx# rY  
} ;\yVwur  
D'y/ pv}!  
改进后的快速排序: 4zyy   
2" (vjnfH  
package org.rut.util.algorithm.support; /6_>d $  
F?]nPb|  
import org.rut.util.algorithm.SortUtil; PqMU&H_  
i*`;/x'+  
/** 2+pLDIIT  
* @author treeroot Gq4~9Tm)*  
* @since 2006-2-2 Fyu CYg \p  
* @version 1.0 @}&o(q1M0  
*/ >mzK96  
public class ImprovedQuickSort implements SortUtil.Sort { 2J;h}/!H  
Q/T\Rr_d  
private static int MAX_STACK_SIZE=4096; Yc+0OBH[  
private static int THRESHOLD=10; [([?+Ouy  
/* (non-Javadoc) y>zPsc,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S?.2V@Ic  
*/ !Kv.v7'N/k  
public void sort(int[] data) { uVJ;1H!  
int[] stack=new int[MAX_STACK_SIZE]; $Bd{Y"P@6  
9)={p9FZY  
int top=-1; ^hOnLy2  
int pivot; j'lfH6_')e  
int pivotIndex,l,r; PfTjC"`,  
D0(QZrVa  
stack[++top]=0; q|)8VmVV  
stack[++top]=data.length-1; &f1dCL%z7  
E7E>w#T5  
while(top>0){ Jt6~L5[_s  
int j=stack[top--]; $0rSb0[  
int i=stack[top--]; W2Y%PD9a  
XjpFJ#T*$A  
pivotIndex=(i+j)/2; e6{}hiM  
pivot=data[pivotIndex]; 1X\dH<B}  
]wLHe2bE u  
SortUtil.swap(data,pivotIndex,j); U#v??Sl  
"i$Av m  
file://partition j>s> i  
l=i-1; X^4HYm  
r=j; 9H5S@w[je  
do{ Qn> 0s  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); (I~-mzu\  
SortUtil.swap(data,l,r); 56(S[  
} eaQ)r?M  
while(l SortUtil.swap(data,l,r); &-#!]T-P:E  
SortUtil.swap(data,l,j); e=KA|"v xh  
Y>z~0$  
if((l-i)>THRESHOLD){ Y4,~s64e  
stack[++top]=i; il=y m  
stack[++top]=l-1; F0 WM&{v  
} A$G>D3  
if((j-l)>THRESHOLD){ &CW,qY,sh  
stack[++top]=l+1; )&[S*g  
stack[++top]=j; l v]TE"  
} f,Vj8@p)x  
Tvr2K84l  
} 1MI/:vy-  
file://new InsertSort().sort(data); R.Xh&@f`  
insertSort(data); (Nd5VuI  
} DYlu`j_ux  
/** "#x<>a )O\  
* @param data WXP=U^5Si  
*/ ;RNU`I p  
private void insertSort(int[] data) { M{$EJS\d=  
int temp; d *ch.((-  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); >pjmVl w?  
} >x0"gh  
} 1au1DvH  
} 'r6s5 WC  
MKSiOM  
} ia !t~~f  
]c,ttS _  
归并排序: Afi;s. ,  
[4'C4Zl  
package org.rut.util.algorithm.support; 6?n AO  
uNe5Mv|}  
import org.rut.util.algorithm.SortUtil; &VtTUy}  
Uu xbN-u  
/** zk8 s?$  
* @author treeroot 1euL+zeh  
* @since 2006-2-2 RYzDF+/  
* @version 1.0 uev$5jlX  
*/ o9-b!I2  
public class MergeSort implements SortUtil.Sort{ )`?Es8uW  
+$M%"=tk  
/* (non-Javadoc) qQC<oR  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wzhM/Lmo\z  
*/ :eqDEmr>  
public void sort(int[] data) { \"BoTi'2!  
int[] temp=new int[data.length]; / *J}7  
mergeSort(data,temp,0,data.length-1); isK~=  
} C=L_@{^Rgb  
t b5k|  
private void mergeSort(int[] data,int[] temp,int l,int r){ kW>Q9Nc=V  
int mid=(l+r)/2; z+5l: f  
if(l==r) return ; ~[bS+ ]d!  
mergeSort(data,temp,l,mid); i{zg{$U  
mergeSort(data,temp,mid+1,r); UD6D![e  
for(int i=l;i<=r;i++){ '3B`4W,  
temp=data; F/z$jj)  
} L<bZVocOb_  
int i1=l; Onoi^MDy  
int i2=mid+1; NQzpgf|h  
for(int cur=l;cur<=r;cur++){ =qH9<,p`H  
if(i1==mid+1) |5|^[v   
data[cur]=temp[i2++]; L|4kv  
else if(i2>r) X6s6fu;  
data[cur]=temp[i1++]; a-\\A[E  
else if(temp[i1] data[cur]=temp[i1++]; qa 'YZE`  
else p?S:J`q  
data[cur]=temp[i2++]; e R"XXF0u  
} |r*btyOJk  
} FT'_{e!M  
6v7H?4  
} S'~Zlv 3`  
:Z|lGH =  
改进后的归并排序: |&vQ1o|}  
| _/D-m*  
package org.rut.util.algorithm.support; 1(6B|w5+  
tpw0j CVu  
import org.rut.util.algorithm.SortUtil; &>kklP  
#;GIvfW  
/** FtbqZN[  
* @author treeroot \,jrug<C$^  
* @since 2006-2-2 Qzy[  
* @version 1.0 T;D`=p#  
*/ $P#Cf&R  
public class ImprovedMergeSort implements SortUtil.Sort { g7!P|  
1{\{'EP{  
private static final int THRESHOLD = 10; c$aTl9e  
z^=.05jB  
/* (3z: ;  
* (non-Javadoc) *xB9~:  
* JJJlgr]#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qp8. D4^@3  
*/ b Z c&uq_  
public void sort(int[] data) { ZAe>MNtW  
int[] temp=new int[data.length]; -FA]%Pl<'  
mergeSort(data,temp,0,data.length-1); M,1Yce%+}  
} ])paU8u  
Rz% Px:M  
private void mergeSort(int[] data, int[] temp, int l, int r) { }m NP[L  
int i, j, k;  e;8>/G  
int mid = (l + r) / 2; ;EstUs3  
if (l == r) 5Gm,lNQAv  
return; envu}4wU=e  
if ((mid - l) >= THRESHOLD) 4Fhiac  
mergeSort(data, temp, l, mid); "-JJ6Bk  
else pnin;;D*  
insertSort(data, l, mid - l + 1); ^L}fj$  
if ((r - mid) > THRESHOLD) O)C y4[  
mergeSort(data, temp, mid + 1, r); -.ITcD g  
else b%>vhj&F  
insertSort(data, mid + 1, r - mid); >Ya+#j~CZ  
hU=n>g>nx  
for (i = l; i <= mid; i++) { /C"dwh"``  
temp = data; ?CGbnXZ4Ug  
} 9u<4Q_I`  
for (j = 1; j <= r - mid; j++) { =)5eui>{  
temp[r - j + 1] = data[j + mid]; XE);oL2xP  
} #UGtYD}"  
int a = temp[l]; a.)Gd]}g  
int b = temp[r]; 5_";EED  
for (i = l, j = r, k = l; k <= r; k++) {  TA;  
if (a < b) { 8m Tjf Br  
data[k] = temp[i++]; `?VtB!p@x=  
a = temp; <(x[Qp/5P  
} else { 1c);![O  
data[k] = temp[j--]; De`)`\U  
b = temp[j]; '9cShe  
} \IY)2C<e  
} T'.U?G  
} 5sui*WH  
7m0sF<P{g  
/** YGrmco?G  
* @param data + 5E6|  
* @param l P6w!r>?6N  
* @param i wic"a Y<m  
*/ ]0P-?O:  
private void insertSort(int[] data, int start, int len) { ,^,KWi9  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b,kXV<KtU  
} Rb=T'x'  
} ,[enGw  
} [O*5\&6  
} \(Z'@5vC  
"o&_tB;O  
堆排序: xsS/)R?  
*njdqr2c~  
package org.rut.util.algorithm.support; ,lSt}Lml  
4L#q?]$  
import org.rut.util.algorithm.SortUtil; "l~wzPY)  
nokk! v/  
/** v>zeK  
* @author treeroot I$sJ8\|gw'  
* @since 2006-2-2 !7ct=L  
* @version 1.0 +r[u4?  
*/ bTB/M=M  
public class HeapSort implements SortUtil.Sort{ xC;b<~zN  
HN,E+ dQ  
/* (non-Javadoc) -1t"(v  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q#NXJvI  
*/ B0I(/ 7  
public void sort(int[] data) { 6wH]W+A  
MaxHeap h=new MaxHeap(); O o9 ePw7  
h.init(data); wN/d J  
for(int i=0;i h.remove(); o>x*_4[  
System.arraycopy(h.queue,1,data,0,data.length); @czNiWU"4;  
} Q?Vq/3K;  
+')\,m "z  
private static class MaxHeap{ Sz4YP l  
{8D`A;KD  
void init(int[] data){ I]N?}]uZ  
this.queue=new int[data.length+1]; $ ;cZq  
for(int i=0;i queue[++size]=data; xVHZZ?e  
fixUp(size); u 0KVp6`  
} s.z(1MB]  
} NT?Gl(  
7 J$  
private int size=0;  M\zM-B  
("UcjB^62  
private int[] queue; 27q 9zi!Q  
$%!'c# F  
public int get() { -'btKz*9  
return queue[1]; $p@V1"x  
} 6|gC##T  
dc UaZfON  
public void remove() { W/COrgbW  
SortUtil.swap(queue,1,size--); LwIl2u*  
fixDown(1); ?)<DEu:Y  
} ^(7<L<H  
file://fixdown !4zSE,1  
private void fixDown(int k) { Dz$GPA   
int j; V+My]9ki  
while ((j = k << 1) <= size) { urmx})=  
if (j < size %26amp;%26amp; queue[j] j++; !v(j#N< m  
if (queue[k]>queue[j]) file://不用交换 C5mq@$6  
break; SQ7Ws u>T@  
SortUtil.swap(queue,j,k); 7i?"akr4  
k = j; ximW!y7  
} ~bU!4P}4j  
} csP 5R3  
private void fixUp(int k) { ?m5@ 63 5  
while (k > 1) { 2(V;OWY(@  
int j = k >> 1; e1a8>>bcI  
if (queue[j]>queue[k]) kGm-jh  
break; *'D( j#&  
SortUtil.swap(queue,j,k); k2{*WF  
k = j; 5tUp[/]pl  
} ?pq#|PI)  
} ^PDz"L<*  
RGd@3OjN  
} aOZSX3;wg  
{RFpTh7f:  
} %5<uQc9  
AA[(rw  
SortUtil: gZbC[L  
W@<(WI3  
package org.rut.util.algorithm; \q9wo*A  
<u>l#weG,  
import org.rut.util.algorithm.support.BubbleSort; i> Wsc?  
import org.rut.util.algorithm.support.HeapSort; ,S(^r1R   
import org.rut.util.algorithm.support.ImprovedMergeSort; eZpyDw C{  
import org.rut.util.algorithm.support.ImprovedQuickSort; OxGKtnAjf  
import org.rut.util.algorithm.support.InsertSort; ( )K,~  
import org.rut.util.algorithm.support.MergeSort; 1#LXy%^tO  
import org.rut.util.algorithm.support.QuickSort; ._2#89V  
import org.rut.util.algorithm.support.SelectionSort; 1&%6sZN  
import org.rut.util.algorithm.support.ShellSort; "b)Y5[nW  
vsc)EM ]  
/** aH7i$U&  
* @author treeroot nn'a` N  
* @since 2006-2-2 1b*Me'  
* @version 1.0 j >f  
*/ [-}LEH1[p  
public class SortUtil { ' lt5|  
public final static int INSERT = 1; XV)<Oavs  
public final static int BUBBLE = 2; jI})\5<R  
public final static int SELECTION = 3; <Uj~S  
public final static int SHELL = 4; epw*Px  
public final static int QUICK = 5; 8 nCw1   
public final static int IMPROVED_QUICK = 6; ^5j+O.zgN  
public final static int MERGE = 7; UQZ<sp4v;  
public final static int IMPROVED_MERGE = 8; CJ+/j=i;~c  
public final static int HEAP = 9; iZsZSW \  
^e*Tg&  
public static void sort(int[] data) { L9(mY `d>"  
sort(data, IMPROVED_QUICK); cE (P^;7D  
} 9i+OYWUO  
private static String[] name={ Cq mtO?vne  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'T G43^  
}; }G8gk"st  
6&jW.G8/  
private static Sort[] impl=new Sort[]{ y.h2hv]Bc  
new InsertSort(), 7.V'T=@x3)  
new BubbleSort(), o< )"\f/,  
new SelectionSort(), SrlTwcD  
new ShellSort(), &>Zm gz  
new QuickSort(), 1< gY  
new ImprovedQuickSort(), \<k5c-8Hb  
new MergeSort(), gumT"x .^  
new ImprovedMergeSort(), QH~;B[->  
new HeapSort() +fh@m h0[  
}; c3S}(8g5.  
Tp vq5Cz  
public static String toString(int algorithm){ K&T[F!  
return name[algorithm-1]; wm1`<r^M.  
} `6bIxb{  
awYnlE/Z1  
public static void sort(int[] data, int algorithm) { M8_f{|!&  
impl[algorithm-1].sort(data); \gz(C`4{j  
} 9i9'Rd`g  
S*"uXTS  
public static interface Sort { uJxT)m!/  
public void sort(int[] data); dJYsn+  
} "AN*2)e4  
o2AfMSt.  
public static void swap(int[] data, int i, int j) {  kwI[BF  
int temp = data; aCxF{>n  
data = data[j]; ,"6Bw|s  
data[j] = temp; & OO0v*@{  
} g=G>4Ua3  
} .D X  
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