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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。 * $  
插入排序: 0?]Y^:  
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package org.rut.util.algorithm.support; U"Gg ,  
&$\B&Hp@  
import org.rut.util.algorithm.SortUtil; pS1f y]  
/** -k$*@Hq  
* @author treeroot \I! C`@0  
* @since 2006-2-2 x.=Np\#\G-  
* @version 1.0 J%_m`?  
*/ Bz&6kRPv  
public class InsertSort implements SortUtil.Sort{ (?9@nS  
l%$~X0%DM  
/* (non-Javadoc) X:aLed_{f  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hKZ<PwBi  
*/ TLBIM  
public void sort(int[] data) { 75u5zD   
int temp;  j|Q*L<J  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); vG`;2laY  
} C}i1)   
}  j-H2h  
} COV8=E~  
?3f-" K_r  
} :\]TAQd-  
7P& O{tl(  
冒泡排序: PRR]DEz  
{S+  $C  
package org.rut.util.algorithm.support; EWcqMD]4u  
q+KGQ*   
import org.rut.util.algorithm.SortUtil; f WUFCbSU  
vlygS(Y_7  
/** td}%reH  
* @author treeroot K\bA[5+N  
* @since 2006-2-2 [iT*L)R4  
* @version 1.0 dX720/R  
*/ 2 Nr*  
public class BubbleSort implements SortUtil.Sort{ EFd9n  
)~u<u:N  
/* (non-Javadoc) _m;H$N~I#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |8DMj s()*  
*/ ji8)/  
public void sort(int[] data) { /t4#-vz  
int temp; 5a0&LNm  
for(int i=0;i for(int j=data.length-1;j>i;j--){ u3[A~V|0=  
if(data[j] SortUtil.swap(data,j,j-1); V|v KYEFry  
} dKG2f  
} :n%KHen3\  
} AW6"1(D  
} =!?4$vW  
_? aI/D  
}  D|8Pe{`  
<w9<G  
选择排序: :iKk"r,2P[  
'yIz<o  
package org.rut.util.algorithm.support; OYbgt4  
t XbMP  
import org.rut.util.algorithm.SortUtil; <kc9KE  
Z(~v{c %<  
/** dXBXV>rbB  
* @author treeroot )<>1Q{j@  
* @since 2006-2-2 hFiJHV  
* @version 1.0 <,X?+hr  
*/ ]b&"](A  
public class SelectionSort implements SortUtil.Sort { Bh%Yu*.f  
&_Vd  
/* u3VSS4RG%  
* (non-Javadoc) HOY@<'  
* $+%eLx*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &B c$8ZR  
*/ W["c3c  
public void sort(int[] data) { K'DRX85F  
int temp; c]OK)i-{l  
for (int i = 0; i < data.length; i++) { |B` mWZ'"  
int lowIndex = i; N H$!<ffz  
for (int j = data.length - 1; j > i; j--) { `#Yv(a2TY  
if (data[j] < data[lowIndex]) { 3<:m;F*#  
lowIndex = j; :5 zXW;s  
} aR@s. ll  
} 61*inGRB  
SortUtil.swap(data,i,lowIndex); %s(Ri6R&  
} 'xn3g;5  
} xUw)mUn@N  
j_#oP  
}  Xb'UsQ  
^j)0&}fB  
Shell排序: F8T.}qI  
K3xs=q]:@  
package org.rut.util.algorithm.support; `{ 6K~(  
:TTZ@ q  
import org.rut.util.algorithm.SortUtil; Lfj]Y~*z  
mY& HK)  
/** rT}k[  
* @author treeroot u,f$cR  
* @since 2006-2-2 7L"Pe'Hw  
* @version 1.0 z~R:!O-  
*/ dK^WZQ  
public class ShellSort implements SortUtil.Sort{ 9[7Gxmf  
~ 6`Ha@  
/* (non-Javadoc) ex}6(;7)O  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^|+;~3<J  
*/ g~Hmka_fD1  
public void sort(int[] data) { p0b2n a !  
for(int i=data.length/2;i>2;i/=2){ )c"m:3D@  
for(int j=0;j insertSort(data,j,i); I"Gr<?r  
} 9bVPMq7}i  
} =4H"&Eu{  
insertSort(data,0,1); QaAWO  
} U`HSq=J  
}.$5'VGO  
/** 2TxHY|4  
* @param data N7WQ{/PSG  
* @param j /A{/  
* @param i ',g'Tl^E  
*/ ^vQ,t*Uj=  
private void insertSort(int[] data, int start, int inc) { WdvXVF  
int temp; S.$/uDwo  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); }wkZ\q[  
} d4]9oi{}  
} F]4JemSjK  
} @9X+ BdQU  
f(r=S Xa*  
} ^o@N.+`&<  
y))) {X  
快速排序: K>a+-QWK3  
8U$(9X  
package org.rut.util.algorithm.support; %x2_njDd  
:Q@qR((&o  
import org.rut.util.algorithm.SortUtil; j4fv-{=$  
G7yR&x^  
/** %0<-5&GE  
* @author treeroot /`b(} m  
* @since 2006-2-2 &0='z  
* @version 1.0 ;94e   
*/ + yF._Ie=  
public class QuickSort implements SortUtil.Sort{ #F~^m  
;vDjd2@  
/* (non-Javadoc) (Q/Kp*a  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g=gWkN <  
*/ A3Lfh6O  
public void sort(int[] data) { 0OrT{jo  
quickSort(data,0,data.length-1); P t)Ni  
} * t-Wol  
private void quickSort(int[] data,int i,int j){ 6S2u%-]  
int pivotIndex=(i+j)/2; f L}3I(VK  
file://swap "iC*Eoz#.  
SortUtil.swap(data,pivotIndex,j); Zc<fopih  
S=R}#  
int k=partition(data,i-1,j,data[j]); @0 mR_\u\  
SortUtil.swap(data,k,j); l1utk8'-  
if((k-i)>1) quickSort(data,i,k-1); "")I1 iO g  
if((j-k)>1) quickSort(data,k+1,j); x^J}]5{0  
Z|h&Zd1z  
} F*bmV>Qq  
/** N!u(G  
* @param data IQ`#M~:  
* @param i fF"\$Ny  
* @param j -b7q)%V  
* @return .8O.  
*/ {);S6F$[3  
private int partition(int[] data, int l, int r,int pivot) { \U0p?wdr:  
do{ k$u/6lw]IB  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ;ZSJ-r  
SortUtil.swap(data,l,r); etPb^&#$  
} heAbxs  
while(l SortUtil.swap(data,l,r); k70o=}  
return l; nVp*u9]  
} !='?+Ysxs  
v`Iw:?)%  
} ,Qd;t  
_"Bh 3 7  
改进后的快速排序: l.V{H<v}  
.BWCGb2bH  
package org.rut.util.algorithm.support; "8'aZ.P  
U1Z.#ETnM  
import org.rut.util.algorithm.SortUtil; "'@iDq%y  
RwG@C|sG  
/** Td7=La0   
* @author treeroot 7AE)P[  
* @since 2006-2-2 "-pQL )f  
* @version 1.0 ^Ia:e ?)W  
*/ IC1oW)  
public class ImprovedQuickSort implements SortUtil.Sort { rhLm2q  
u+&t"B  
private static int MAX_STACK_SIZE=4096; LFi8@  
private static int THRESHOLD=10; O e-FI+7  
/* (non-Javadoc) efK|)_i :  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K KPQ[3g  
*/ VSW:h  
public void sort(int[] data) { e~NEyS~3  
int[] stack=new int[MAX_STACK_SIZE]; Ic%c%U=i  
.%.bIT  
int top=-1; epcBr_}  
int pivot; 4H<@da}  
int pivotIndex,l,r; cVx#dDdA  
.d^XM  
stack[++top]=0; O0"u-UX{  
stack[++top]=data.length-1; }67lL~L  
IfK%i/J  
while(top>0){ !`3q9RT3."  
int j=stack[top--]; yo#aX^v~y  
int i=stack[top--]; IQ${2Dpg[  
$50/wb6s  
pivotIndex=(i+j)/2; N^)\+*tf1  
pivot=data[pivotIndex]; 5#DtaVz  
@Kx@ 2#~b  
SortUtil.swap(data,pivotIndex,j); |>/T*zk<  
M<4tjVQ6  
file://partition @w8MOT$  
l=i-1; w^_[(9 `  
r=j; |f :1Br  
do{ Ewfzjc  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); z'FpP  
SortUtil.swap(data,l,r); C J@G8>  
} F5hOKUjv  
while(l SortUtil.swap(data,l,r); Wfw6(L  
SortUtil.swap(data,l,j); SuO@LroxTB  
Sk ~( t  
if((l-i)>THRESHOLD){ s.9)? < [  
stack[++top]=i; a2'si}'3  
stack[++top]=l-1; NZP>aV-  
} ,?'":T1[  
if((j-l)>THRESHOLD){ ai3wSUYJi  
stack[++top]=l+1; ?hz9]I/8  
stack[++top]=j; f  _ O  
} c]u^0X?&  
5._=m"Pl  
} %, U@ D4w  
file://new InsertSort().sort(data); i^i^g5l!  
insertSort(data); aUqVcEU1  
} myR}~Cj;q  
/** gbC!>LV  
* @param data ogOUrJ}P  
*/ e >OYJd0s  
private void insertSort(int[] data) { OdZLJt?g  
int temp; _ ?\4k{ET  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); K+`$*vS~ws  
} @CxXkR  
} 2l8TX#K  
} b <1k$0J6  
" ,qcqG(  
} O%$XgEJ8p  
YFGQPg  
归并排序: N ?RJuDW  
Q#,j,h  
package org.rut.util.algorithm.support; "!fvEE  
!%1=|PX_  
import org.rut.util.algorithm.SortUtil; Nydhal00  
"1-|ahW  
/** 1]yjhw9g  
* @author treeroot A3!xYG=+  
* @since 2006-2-2 ssWSY(j]  
* @version 1.0 .3tyNjsn\  
*/ 0zL7$Q#c  
public class MergeSort implements SortUtil.Sort{ q%RPA e  
!6d6b@Mv  
/* (non-Javadoc) LK?V`J5wY  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DaK2P;WP  
*/ 3Mw2;.rk  
public void sort(int[] data) { MV~-']2u  
int[] temp=new int[data.length]; VkD8h+)  
mergeSort(data,temp,0,data.length-1); =$^<@-;  
} :J'ibb1  
9uRs@]i  
private void mergeSort(int[] data,int[] temp,int l,int r){ Hf ]w  
int mid=(l+r)/2; Y(` # J[  
if(l==r) return ; }+" N '  
mergeSort(data,temp,l,mid); _kJ?mTk  
mergeSort(data,temp,mid+1,r); cSkJlhwNn  
for(int i=l;i<=r;i++){  =Y0>b4  
temp=data; us:V\V  
} z;74(5?q  
int i1=l; 6z(eW]p  
int i2=mid+1; mp\`9j+{  
for(int cur=l;cur<=r;cur++){ "(U%Vg|)  
if(i1==mid+1) T9N&Nh7 3  
data[cur]=temp[i2++]; JLZ[sWP='  
else if(i2>r) #4iiY6  
data[cur]=temp[i1++]; T\Zq/Z\  
else if(temp[i1] data[cur]=temp[i1++]; g#=~A&4q  
else HifU65"8  
data[cur]=temp[i2++]; :EX H8n&|  
} /!u#S9_B  
} @`</Z)  
uAWmg8  
} |&>!"27;w  
xEA%UFB.!G  
改进后的归并排序: icX$<lD  
|H,g}XWMU  
package org.rut.util.algorithm.support; r RfPq  
Rilr)$  
import org.rut.util.algorithm.SortUtil; pO~VI$7  
CkJU5D  
/** V?k"BU  
* @author treeroot wR"4slY_%  
* @since 2006-2-2 6Wos6_  
* @version 1.0 d^&F%)AT  
*/ aWLeyXsAu  
public class ImprovedMergeSort implements SortUtil.Sort { CQq'x +{F  
+dkbt%7M  
private static final int THRESHOLD = 10; /$IF!q+C  
pY3N7&m\:  
/* j'?^<4i  
* (non-Javadoc) t*fG;YOg  
* -*?Y4}mK  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pvz*(u  
*/  9"@P.8_  
public void sort(int[] data) { 4b"%171  
int[] temp=new int[data.length]; [ imC21U  
mergeSort(data,temp,0,data.length-1); a?+Ni|+  
} [7gyF}*;  
!U,^+"l'GP  
private void mergeSort(int[] data, int[] temp, int l, int r) { ^ ExA  
int i, j, k; bb6 ~H  
int mid = (l + r) / 2; b&$ ?.z  
if (l == r) seFug  
return; :'OCQ.[{s  
if ((mid - l) >= THRESHOLD) ?kICYtY:_b  
mergeSort(data, temp, l, mid); ${$XJs4  
else q\qV~G`  
insertSort(data, l, mid - l + 1); XUD/\MoV  
if ((r - mid) > THRESHOLD) 9<An^lLK*  
mergeSort(data, temp, mid + 1, r); O<R6^0B42  
else W|U!kqU  
insertSort(data, mid + 1, r - mid); :!a9|Fh~  
wz*QB6QtU  
for (i = l; i <= mid; i++) { (K$K;f$"r  
temp = data; r9Ux=W\  
} O&# bC  
for (j = 1; j <= r - mid; j++) { 2`#jw)dM;}  
temp[r - j + 1] = data[j + mid]; w;.'>ORC  
} (~oUd 4  
int a = temp[l]; %h** L'~``  
int b = temp[r]; ?Z@FxW  
for (i = l, j = r, k = l; k <= r; k++) { |Xblz1>DF  
if (a < b) { L~1u?-zu  
data[k] = temp[i++]; 4C(vBKl  
a = temp; @GGzah#  
} else { $]CZ]EWts  
data[k] = temp[j--]; 5_+vjV;5  
b = temp[j];  6h N~<  
} B$k<F8!%  
} ?lv{;4BC  
} f\"Qgn  
f>JuxX\G  
/** omM*h{z$$  
* @param data eI?<*  
* @param l WYTeu "  
* @param i tRYMK+  
*/ @v9 PI/c  
private void insertSort(int[] data, int start, int len) { A)En25,X  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2 [a#wz'  
} ZLdvzH@'  
} }N5>^y  
} chsjY]b  
} 2q J}5  
[7?K9r\#  
堆排序: %4U;Rdq&Ud  
v?rjQ'OP  
package org.rut.util.algorithm.support; #d%'BUde  
nM  D^x  
import org.rut.util.algorithm.SortUtil; ~C< X~$y&  
< vU<:S  
/** \pZ,gF;y  
* @author treeroot 6\)61o_1|  
* @since 2006-2-2 E;~gQ6vAI  
* @version 1.0 ,v:m  
*/ 7]Y Le+Ds  
public class HeapSort implements SortUtil.Sort{ .Vux~A  
<OF7:f  
/* (non-Javadoc) bp2l%A;  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oju7<b9Ez  
*/ ^AMcZ6!\  
public void sort(int[] data) { 0\%/:2   
MaxHeap h=new MaxHeap(); STs~GOm-  
h.init(data); J&S$F:HM  
for(int i=0;i h.remove(); *. l,_68  
System.arraycopy(h.queue,1,data,0,data.length); -,Cx|Nl  
} M(x5D;db/  
#gi0FXL  
private static class MaxHeap{ 3N(s)N_P M  
~WU _u,:  
void init(int[] data){  @jO3+  
this.queue=new int[data.length+1]; ]uX'[Z}t  
for(int i=0;i queue[++size]=data; w"$CV@AJ  
fixUp(size);  ^ruS  
} t>f<4~%MJ  
} n(,b$_JK7  
R_\{a*lV0  
private int size=0; @Z~lM5n$8  
6#fl1GdH-  
private int[] queue; #9}E@GGs  
s;X"E =  
public int get() { _KC)f'Cx  
return queue[1]; z$oA6qB)  
} *qYcb} ]  
{NXc<0a(  
public void remove() { mf6?8!O}>  
SortUtil.swap(queue,1,size--); Ji4c8*&Jpc  
fixDown(1); :pcKww|V  
} CFAz/x@%  
file://fixdown 0e9W>J9  
private void fixDown(int k) { NqvL,~1G  
int j; lBh|+K N  
while ((j = k << 1) <= size) { U|6ME%xm  
if (j < size %26amp;%26amp; queue[j] j++; qlD+[`=b  
if (queue[k]>queue[j]) file://不用交换 _H>ABo  
break; B;Ab`UX#t  
SortUtil.swap(queue,j,k); KB <n-'  
k = j; L)&?$V  
} "AP'' XNi  
} ?Q;8D@   
private void fixUp(int k) { cW;to Q!P  
while (k > 1) { JYOyz+wNd  
int j = k >> 1; @4Z>;  
if (queue[j]>queue[k]) l;}D| 6+_W  
break; ]Gm,sp.x  
SortUtil.swap(queue,j,k); 2+ F34  
k = j; FYR%>Em  
} K/79Tb-  
} /vS!9f${  
8:0QIkqk  
} ,n TC7V  
wQWokpP;T7  
} o1YX^-<[F  
7'Y 3T[  
SortUtil: "pdmz+k8S  
Gp'rN}i^  
package org.rut.util.algorithm; SdBv?`u|g  
$wH{snX  
import org.rut.util.algorithm.support.BubbleSort; {ER! 0w/  
import org.rut.util.algorithm.support.HeapSort; &Z/aM?  
import org.rut.util.algorithm.support.ImprovedMergeSort; z kQV$n{  
import org.rut.util.algorithm.support.ImprovedQuickSort; 4\4onCzuT  
import org.rut.util.algorithm.support.InsertSort; S-WD?BF C  
import org.rut.util.algorithm.support.MergeSort; ' Dv `Gj  
import org.rut.util.algorithm.support.QuickSort; ` `j..v,  
import org.rut.util.algorithm.support.SelectionSort; I!&|L0Qq  
import org.rut.util.algorithm.support.ShellSort; fs+l  
H!Z=}>TN  
/** H_m(7@=  
* @author treeroot 2s>dlz  
* @since 2006-2-2 V$%%nG uE  
* @version 1.0 [H)NkR;I  
*/ 0b+OB pqN  
public class SortUtil {  }tv%  
public final static int INSERT = 1; jnsV'@v8Nj  
public final static int BUBBLE = 2; Ks . m5R  
public final static int SELECTION = 3; /2pf*\u  
public final static int SHELL = 4; 3US}('  
public final static int QUICK = 5; e}yoy+9  
public final static int IMPROVED_QUICK = 6; YMOy 6C  
public final static int MERGE = 7; $ r)+7i  
public final static int IMPROVED_MERGE = 8; DKgwi'R  
public final static int HEAP = 9; [~9rp]<  
VXXo\LQUU  
public static void sort(int[] data) { lb ol+O65  
sort(data, IMPROVED_QUICK); l?v`kAMR  
} 90L,.  
private static String[] name={ eWzD'3h^  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *c4uCI:0t  
}; ..6 : _{wg  
?nJ7lLQA  
private static Sort[] impl=new Sort[]{ |#8u:rguy  
new InsertSort(), |6w.m<p  
new BubbleSort(), rStfluPL  
new SelectionSort(), fH~InDT^  
new ShellSort(), FJKW=1 =,  
new QuickSort(), x4|>HY<p?  
new ImprovedQuickSort(), wU,{ 5w  
new MergeSort(), P.Pw .[:3  
new ImprovedMergeSort(), |3{DlZ2S  
new HeapSort() y>wrm:b-O  
}; 48dIh\TH"  
&}wr N(?w  
public static String toString(int algorithm){ +^tq?PfE  
return name[algorithm-1]; | n5F_RL  
} 3"=% [  
M,@\*qlEJ  
public static void sort(int[] data, int algorithm) { v(D{_  
impl[algorithm-1].sort(data); HL$}Gh]q  
} n ^P=a'+  
j~,7JJ (y  
public static interface Sort { a7'.*H]  
public void sort(int[] data); C{>@b:]p  
} q<` YJ,  
<"w;:Zs  
public static void swap(int[] data, int i, int j) { hZ2!UW4'  
int temp = data; [.4R ,[U  
data = data[j]; ^|y6oj  
data[j] = temp; wy6>^_z  
} Awl4*J~  
} N %N %  
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