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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。 #[A/zH|xvV  
插入排序: 83 S],L  
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package org.rut.util.algorithm.support; 7 724,+2N  
|BXq8Erh  
import org.rut.util.algorithm.SortUtil; 0{j>u`  
/** ZQyT$l~b  
* @author treeroot R ~cc]kp0  
* @since 2006-2-2 3*FktXmI}  
* @version 1.0 1D*e u  
*/ , vky  
public class InsertSort implements SortUtil.Sort{ f6m^pbQFl  
2/;KZ+U&  
/* (non-Javadoc) vj#gY2qZ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4 Hu+ljdjB  
*/ ALKhZFuz  
public void sort(int[] data) { (Q @m;i>  
int temp; o]]Q7S=  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); M0^r!f>O  
} 0]"j,  
} ~[[a7$_4  
} .$q]<MK8  
`dj/Uk  
} XL +kEZ|3  
M5<5 (l  
冒泡排序: m, *f6g  
0[PP -]JS  
package org.rut.util.algorithm.support; 9_HEImk  
&Zf@vD  
import org.rut.util.algorithm.SortUtil; ^@6eN]  
s6qe5[  
/** 2bCa|HTv  
* @author treeroot k_!z=6?[:  
* @since 2006-2-2 c*3ilMP\4  
* @version 1.0 D 0(gEb  
*/ C&"8A\we  
public class BubbleSort implements SortUtil.Sort{ *EotYT  
87*R#((  
/* (non-Javadoc) s&c^Wr  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |C5i3?  
*/ !x,3k\M  
public void sort(int[] data) { AKS(WNGEp  
int temp; BG'gk#J+f  
for(int i=0;i for(int j=data.length-1;j>i;j--){ %``FIv15w  
if(data[j] SortUtil.swap(data,j,j-1); <H$CCo  
} ']qC,;2  
} 6z/8n f +u  
} M14pg0Q  
} oiklRf  
UH[ YH;3O  
} bi,%QZZ  
q6osRK*20  
选择排序: yLI=&7/e@  
3lKIEPf6r  
package org.rut.util.algorithm.support; ;  I=z  
i~\gEMaO  
import org.rut.util.algorithm.SortUtil; ZkqC1u3  
X-t4irZ)  
/** [TNYPA> {  
* @author treeroot A]R"C:o  
* @since 2006-2-2 S_\RQB\l  
* @version 1.0 4h(aTbHaQ  
*/ 8y+Gvk:  
public class SelectionSort implements SortUtil.Sort { Gk!v-h9cq  
#?aR,@n  
/* {VI%]n{M  
* (non-Javadoc) 2*Gl|@~N  
* TN l$P~X>  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .&* Tj}p  
*/ 2y,~i;;_  
public void sort(int[] data) { vnIxI a  
int temp; 71f]KalqL  
for (int i = 0; i < data.length; i++) { FxD"z3D  
int lowIndex = i; H4%wq  
for (int j = data.length - 1; j > i; j--) { );=JoRQ{  
if (data[j] < data[lowIndex]) { 7\jH?Zi  
lowIndex = j; J\2F%kBej?  
} Ef7 Kx49I  
} 654PW9{(  
SortUtil.swap(data,i,lowIndex); Z3[,Xw  
} D@\97t+  
} o6{XT.z5qx  
c5U1N&k5&  
} 9N9|hy  
hf%W grO.  
Shell排序: ib& |271gG  
Q>||HtF$A  
package org.rut.util.algorithm.support; &M<431y  
1f~_# EIC  
import org.rut.util.algorithm.SortUtil; 6Q\n<&,{  
F=# zy#@.  
/** W&rjJZY6  
* @author treeroot {9P<G]Z  
* @since 2006-2-2 bXtA4O  
* @version 1.0 K)^.96{/@  
*/ H#6J7\xcS  
public class ShellSort implements SortUtil.Sort{ fDqlN`P@  
smk0*m4  
/* (non-Javadoc) Ot v{#bB$  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4;%=ohD:!  
*/ ))eR  
public void sort(int[] data) { -[+FVvS  
for(int i=data.length/2;i>2;i/=2){ aIkxN&  
for(int j=0;j insertSort(data,j,i); p%j@2U  
} _gU [FUBtJ  
} Ih"f98lV  
insertSort(data,0,1); ^gv)[  
} ]jM D'vg^b  
KxiZx I  
/** M"~B_t,Nw  
* @param data &0Nd9%>  
* @param j /@on=~  
* @param i >R.~'A/$F  
*/ ;/ p)vR  
private void insertSort(int[] data, int start, int inc) { {%~Sbcq4F  
int temp; &4DvZq=  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); Hjlx,:'M  
} na%9E8;:&v  
} pW!]  
} x37r{$2  
'\ 6.GP  
} /GCSC8T  
_{T`ka  
快速排序: YMz[je  
b$g.">:$  
package org.rut.util.algorithm.support; _Z9I')  
f61~%@fE  
import org.rut.util.algorithm.SortUtil; b/E1v,/<  
nEs l  
/** Vd|/]Zj  
* @author treeroot -BNW\ ]}  
* @since 2006-2-2 ox)/*c<  
* @version 1.0 V GM/ed5-  
*/ Ik~5j(^E-  
public class QuickSort implements SortUtil.Sort{ J2yq|n?2gq  
Cvi-4   
/* (non-Javadoc) @-Gf+*GZys  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a#KxjVM  
*/ nj)M$'  
public void sort(int[] data) { k98--kc5  
quickSort(data,0,data.length-1); \#~~,k 6f  
} gNe{P~ $=  
private void quickSort(int[] data,int i,int j){ !L>'g  
int pivotIndex=(i+j)/2; v82@']IN  
file://swap OhIUm4=|$  
SortUtil.swap(data,pivotIndex,j); }p."7(  
{dCkiF  
int k=partition(data,i-1,j,data[j]); ~d>O.*Q)  
SortUtil.swap(data,k,j); %K?~$;Z.  
if((k-i)>1) quickSort(data,i,k-1); cjH ~H8  
if((j-k)>1) quickSort(data,k+1,j); ijC;"j/(  
OB5{EILej  
}  M3u[E  
/** 0(0Ep(Vj  
* @param data bQ_i&t\yzB  
* @param i ?c(f6p?%  
* @param j G=\rlH]N  
* @return DlTV1X-^1  
*/ 8+ `cv"  
private int partition(int[] data, int l, int r,int pivot) { Pq;1EI  
do{ +X.iJ$)  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ZH.l^'(W  
SortUtil.swap(data,l,r); Z=n& fsE  
} Bxz{rR0XV  
while(l SortUtil.swap(data,l,r); KvC:(Vqj  
return l; %!LrC!6P4  
} ]uj H7T  
4AUY8Pxp  
} FL0[V,  
*}3~8fu{  
改进后的快速排序: us$~6  
)FE'#\  
package org.rut.util.algorithm.support; <@e6zQG  
0^tF_."Y  
import org.rut.util.algorithm.SortUtil; k|a{ |2p  
)p ,-TtV  
/** hoeOdWI pf  
* @author treeroot i^="*t\i  
* @since 2006-2-2 , lT8gQ|u  
* @version 1.0 :9]23'Md  
*/ &`t-[5O\  
public class ImprovedQuickSort implements SortUtil.Sort { "'s`?  
Mm|HA@W^  
private static int MAX_STACK_SIZE=4096; rcNM,!dZ  
private static int THRESHOLD=10; #S_LKc  
/* (non-Javadoc) aRj3TtFh  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r=8]Ub[  
*/ +qjW;]yxP  
public void sort(int[] data) { nM\W a  
int[] stack=new int[MAX_STACK_SIZE]; Q8T4_p [-o  
\-`L}$  
int top=-1; a]$KI$)e  
int pivot; d.2   
int pivotIndex,l,r; o y}(  
7{/qQGL  
stack[++top]=0; Z A7u66  
stack[++top]=data.length-1; R4p bi=  
Zo'lvOpyZ  
while(top>0){ *Cj]j-  
int j=stack[top--]; `Fu|50_@V  
int i=stack[top--]; Y~gpiL3u  
vAU^<$D27  
pivotIndex=(i+j)/2; >TwOL  
pivot=data[pivotIndex]; ~r&Q\G  
"fS9Nx3  
SortUtil.swap(data,pivotIndex,j); _U/etlDTO  
2-UZ|y  
file://partition X[grV e  
l=i-1; KiH#*u S  
r=j; gO_^{>2  
do{ R0-ARq#0<  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); fJC)>doM  
SortUtil.swap(data,l,r); Mp"] =  
} Ypha{d  
while(l SortUtil.swap(data,l,r); 80l(,0`,  
SortUtil.swap(data,l,j); +xFtGF)  
OjyS ?YY)b  
if((l-i)>THRESHOLD){ B3)#Ou2  
stack[++top]=i; GsE?<3  
stack[++top]=l-1; |LiFX5!\  
} ?jz{fU  
if((j-l)>THRESHOLD){ |oPqX %?  
stack[++top]=l+1; 7q$9\RR5  
stack[++top]=j; sW|u}8`  
} ;MNEe% TJ  
2|w(d  
} D[:7B:i  
file://new InsertSort().sort(data); A3!NEFBK  
insertSort(data); iTqv=  
} aN%t>*?Xa  
/** 2ggW4`"c  
* @param data /.7x[Yc  
*/ s13Iu#  
private void insertSort(int[] data) { $?ke "  
int temp; R*VZ=i  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 7A3e-51 >  
} (:M6*RV  
} ;cxYX/fJ  
} At+on9&=  
y#YCc{K [  
} vTU"c>]  
kd!f/'E!  
归并排序: i|.!*/qF  
^ chlAQz(  
package org.rut.util.algorithm.support; B>YrDJUN  
9Ni$nZN  
import org.rut.util.algorithm.SortUtil; Ho\K %#u  
DCP "  
/** (J$JIPF  
* @author treeroot 3l5q?"$  
* @since 2006-2-2 $N:m 9R  
* @version 1.0 8Bo'0  
*/ kZPj{^c:  
public class MergeSort implements SortUtil.Sort{ cg0L(oI~  
in(n[K  
/* (non-Javadoc) nb(#;3DQ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ] M_[*OAb  
*/ Zff-Hl  
public void sort(int[] data) { 4>$>XL1  
int[] temp=new int[data.length]; oV,>u5:B  
mergeSort(data,temp,0,data.length-1); j%~UU0(J  
} 6;[iX`LL  
q+|Dm<Ug  
private void mergeSort(int[] data,int[] temp,int l,int r){ n3~xiQ'  
int mid=(l+r)/2; )x?F1/  
if(l==r) return ; w4RP*Da?:  
mergeSort(data,temp,l,mid); $o {f)'.>n  
mergeSort(data,temp,mid+1,r); (O /hu3  
for(int i=l;i<=r;i++){ Kgk9p`C(  
temp=data; v\$XhOK  
} |hOqz2|  
int i1=l; 2$\Du9+  
int i2=mid+1; Z+I[  
for(int cur=l;cur<=r;cur++){ XW5r@:e  
if(i1==mid+1) mbJ#-^}V  
data[cur]=temp[i2++]; mZMLDs:  
else if(i2>r) j"}alS`-  
data[cur]=temp[i1++]; 7QQ1oPV  
else if(temp[i1] data[cur]=temp[i1++]; ~`8`kk8  
else f<0-'fGJd  
data[cur]=temp[i2++]; /of,4aaK7  
} X(g<rz1J]  
} 7&|fD{:4U  
<P g.N  
} @0n #Qs|E!  
?Za1  b  
改进后的归并排序: L{<E'#@F  
CNf eHMT  
package org.rut.util.algorithm.support; Jq/([  
 yZdM4`  
import org.rut.util.algorithm.SortUtil; vTP'\^;  
B5J=q("P  
/** cz&FOP+!  
* @author treeroot Wa ,[#H  
* @since 2006-2-2 *8X: fq  
* @version 1.0 *gVRMSrx4  
*/ F0Rk[GM  
public class ImprovedMergeSort implements SortUtil.Sort { QJ>+!p*  
w9c  
private static final int THRESHOLD = 10; eX;"kO  
R &T(S  
/* 80axsU^H0  
* (non-Javadoc) OC"W=[Myl  
* u=RF6V|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a?\ Au  
*/ `')3}  
public void sort(int[] data) { au0)yg*V1  
int[] temp=new int[data.length]; F9-xp7 T  
mergeSort(data,temp,0,data.length-1); LT# *nr  
} NqlG=pu  
6S<J'9sE  
private void mergeSort(int[] data, int[] temp, int l, int r) { CXvL`d"  
int i, j, k; sq-[<ryk  
int mid = (l + r) / 2; ks:Z=%o   
if (l == r) 80 i<Ij8J  
return; 9M<qk si  
if ((mid - l) >= THRESHOLD) a:v&pj+|<  
mergeSort(data, temp, l, mid); G|IO~o0+  
else W[w8@OCNf  
insertSort(data, l, mid - l + 1); kCLz@9>FQ  
if ((r - mid) > THRESHOLD) $WrDZU 2z  
mergeSort(data, temp, mid + 1, r); ]"{K5s7  
else WPpl9)Qc  
insertSort(data, mid + 1, r - mid); | u7vY/  
9q;+ Al^Z  
for (i = l; i <= mid; i++) { O .m; a_  
temp = data; -~]*)&  
} "*XR'9~7  
for (j = 1; j <= r - mid; j++) { 2c_#q1/Z/  
temp[r - j + 1] = data[j + mid];  ()=  
} Rco#?'  
int a = temp[l]; $Rd74;edn  
int b = temp[r]; K"#np!Y)  
for (i = l, j = r, k = l; k <= r; k++) { ^)D[ W(*  
if (a < b) { \C~Y  
data[k] = temp[i++]; pDrM8)r  
a = temp; FF)F%o+:w  
} else { !T#~.QP4  
data[k] = temp[j--]; D CcM~  
b = temp[j]; ]'EtLFv)  
} =Y?M#3P.I  
} s+h`,gg9  
} u-f_,],p  
59F AhEg  
/** gj0gs  
* @param data aS-rRL|\L  
* @param l BD\xUjd?)Q  
* @param i TmvI+AY/  
*/ sas;<yh  
private void insertSort(int[] data, int start, int len) {  (/-2bO  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /{."*jK  
} A<ur20   
} @M?;~M?B]J  
} cX 9 !a,  
} 4 B"tz!  
&CV%+  
堆排序: &S>m +m'  
nX7{09  
package org.rut.util.algorithm.support; H3H3UIIT_  
 ?; ZTJ  
import org.rut.util.algorithm.SortUtil; z v*hA/  
J/:9;{R  
/** ^dJ/>?1  
* @author treeroot K|[[A)tt6  
* @since 2006-2-2 "\Zsr6y  
* @version 1.0 UpF,e>s  
*/ XkDjA#nx`  
public class HeapSort implements SortUtil.Sort{ PxhB=i!'$  
kXFgvIpg<  
/* (non-Javadoc) 1 `hj]@.]  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $8kc1Q  
*/ G&I\Za;   
public void sort(int[] data) { C4 H M  
MaxHeap h=new MaxHeap(); y)0r%=  
h.init(data); vUk <z*  
for(int i=0;i h.remove(); 5A g 4o  
System.arraycopy(h.queue,1,data,0,data.length); [y7BHikX)  
} LBh|4S$K  
O-[lL"T  
private static class MaxHeap{ u]lf~EE  
_DnZ=&=MA  
void init(int[] data){ sOhQu>gN  
this.queue=new int[data.length+1]; 8J-$+ ;  
for(int i=0;i queue[++size]=data; 56Z 1jN^U  
fixUp(size); 5(W`{{AW  
} ]vo&NE  
} .bE+dA6:v  
9+k7x,  
private int size=0; Q x}\[  
:s`~m;Y9?  
private int[] queue; JKN0:/t7 Q  
i0; p?4`m  
public int get() { Xxhzzm-B  
return queue[1]; 5v >0$Y{  
} ca%s$' d  
,Dd )=  
public void remove() { -LI^(_  
SortUtil.swap(queue,1,size--); fTQRn  
fixDown(1); 1AiqB Rs  
} FRqJ#yd]  
file://fixdown Q}zAC2@L  
private void fixDown(int k) { 7DQ{#Gf#G  
int j; AJ1(q:P  
while ((j = k << 1) <= size) { <mN.6@*{  
if (j < size %26amp;%26amp; queue[j] j++; fn(< <FA)  
if (queue[k]>queue[j]) file://不用交换 O75^(keW  
break; ~IrrX,mp:  
SortUtil.swap(queue,j,k); tl5}#uJ  
k = j; M#ED49Dh>  
} /o%J / |  
} .h O ) R.  
private void fixUp(int k) { [\+"<;m$  
while (k > 1) { aly1=j  
int j = k >> 1; 9+><:(,  
if (queue[j]>queue[k]) bWU4lPfP  
break; 7:iTx;,v  
SortUtil.swap(queue,j,k); lAYyxG#  
k = j; EMK>7 aks  
} ai|d`:;  
} #( G>J4E,  
JAEn 72  
} J" :R,w`  
sv}k_6XgY  
} m+&) eQ:  
@q8h'@sX  
SortUtil: a@+n  
!Miw.UmPm  
package org.rut.util.algorithm; SbrKNADH%  
Yu1[`QbB  
import org.rut.util.algorithm.support.BubbleSort; vSyR% j  
import org.rut.util.algorithm.support.HeapSort;  NW$_w  
import org.rut.util.algorithm.support.ImprovedMergeSort; "}/$xOl"  
import org.rut.util.algorithm.support.ImprovedQuickSort; W#^W1j>_G  
import org.rut.util.algorithm.support.InsertSort; F`C$F!GE  
import org.rut.util.algorithm.support.MergeSort; f&5'1tG  
import org.rut.util.algorithm.support.QuickSort; 4o|-v  
import org.rut.util.algorithm.support.SelectionSort; p>9-Ga  
import org.rut.util.algorithm.support.ShellSort; YC,)t71l{  
QV&yVH=Xs  
/** kx3?'=0;5  
* @author treeroot yxz)32B?  
* @since 2006-2-2 TDqH"q0  
* @version 1.0 9| ('*  
*/ Qg^Ga0Lf6  
public class SortUtil { [9c|!w^F  
public final static int INSERT = 1; ^"  
public final static int BUBBLE = 2; {`KRr:w  
public final static int SELECTION = 3; Y:;]qoF  
public final static int SHELL = 4; m@A?'gD  
public final static int QUICK = 5; (-e*xM m  
public final static int IMPROVED_QUICK = 6; *{K?JB#W  
public final static int MERGE = 7; #gQaNc?  
public final static int IMPROVED_MERGE = 8; 7~f"8\  
public final static int HEAP = 9; V DN@=/  
[>MPM$9F-m  
public static void sort(int[] data) { kuX{2h*`  
sort(data, IMPROVED_QUICK); |L}1@0i  
} #?^%#"~4H  
private static String[] name={ +xL*`fn  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W08rGY  
}; iCZuE:I1K,  
VMZUJ2Yj/&  
private static Sort[] impl=new Sort[]{ i L48  
new InsertSort(), |mS-<e8LY4  
new BubbleSort(), (H[ .\O-`  
new SelectionSort(), p)k5Uh"  
new ShellSort(), l>t0 H($  
new QuickSort(), C)z?-f  
new ImprovedQuickSort(), R?Ou=p .  
new MergeSort(), FdcmA22k*  
new ImprovedMergeSort(), m|by^40A(  
new HeapSort() @ =XJ<  
}; rm5@dM@  
0nu&JQ  
public static String toString(int algorithm){ ZR[6-  
return name[algorithm-1]; s~tZN  
} -TT{4\%s  
>U9JbkeF  
public static void sort(int[] data, int algorithm) { "?n;dXYSi  
impl[algorithm-1].sort(data); +YFAZv7`  
} }fqy vI  
tupAU$h?!  
public static interface Sort { C&/_mm5  
public void sort(int[] data); AK_,$'f  
} ]ME2V  
.`TDpi9OB  
public static void swap(int[] data, int i, int j) { mr[+\ 5  
int temp = data; v"v-c!k  
data = data[j]; v~AD7k2{8  
data[j] = temp; kBlk^=h<:w  
} :< *xG&  
} 8iwH^+h~  
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