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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。 NfwYDY  
插入排序: 8Kk\*8 <  
_ 08];M|  
package org.rut.util.algorithm.support; kH?#B%N5  
vT7g<  
import org.rut.util.algorithm.SortUtil; mxJXL":|  
/** hNbIpi=  
* @author treeroot %idk@~HCg  
* @since 2006-2-2 4o5i ."l  
* @version 1.0 J`oTes,  
*/ %0XvJF)s  
public class InsertSort implements SortUtil.Sort{ Zw$ OKU  
+\`rmI  
/* (non-Javadoc) kus}W  J  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |!LnAh  
*/ jN/ j\x'  
public void sort(int[] data) { ssl&5AS  
int temp; @6&JR<g*t  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ;&f1vi4  
} 'jvpNn  
} q`Q}yE> 9  
} l,d, T  
6G_<2bO  
} @`|)Ia<  
E5UcZ7  
冒泡排序: B?6QMC;  
nQ=aLV+'  
package org.rut.util.algorithm.support; S%l:kKD  
m 22wF>9  
import org.rut.util.algorithm.SortUtil; };S0 G!  
x(~<tX~  
/** JNo8>aFOb  
* @author treeroot lTz6"/  
* @since 2006-2-2 -Mf Q&U   
* @version 1.0 N:W9},  
*/ 4| Ui?.4=  
public class BubbleSort implements SortUtil.Sort{ ::"E?CQLV  
^}>/n. %  
/* (non-Javadoc) '*!L!VJ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Gi7RMql6Q  
*/ /fwgqFVk  
public void sort(int[] data) { h-mTj3p-K  
int temp; &Lt@} 7$8  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ^oeJKjJ  
if(data[j] SortUtil.swap(data,j,j-1); `\b+[Nes  
} ,rO[mNk9@  
} %l$W*.j|;  
} WzlC*iv  
} Ceg!w#8Z,  
h$fe -G#  
} +jV_Wz  
q#[`KOPV  
选择排序: .  /m hu  
^:cRp9l"7  
package org.rut.util.algorithm.support; =r6qX  
EW(J5/mn  
import org.rut.util.algorithm.SortUtil; +)/ Uu3"=  
)#[|hb=o  
/** `s /?b|,  
* @author treeroot 9l !S9d  
* @since 2006-2-2 ][:rLs  
* @version 1.0 }5n  
*/ QK <\kVZ8  
public class SelectionSort implements SortUtil.Sort { `X8@/wf#  
REA;x-u*  
/* wE Qi0!  
* (non-Javadoc) V4K'R2t  
* }ug xN0  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N|dD!  
*/ ]gP5f@`  
public void sort(int[] data) { "H+,E_&(  
int temp; xRxy|x[  
for (int i = 0; i < data.length; i++) { ClQe4uo{  
int lowIndex = i; dM]#WBOP y  
for (int j = data.length - 1; j > i; j--) { YfDWM7x7,  
if (data[j] < data[lowIndex]) { eegx'VSX4  
lowIndex = j; E1*QdCV2  
} ?R'Y?b  
} 2@Lb foA  
SortUtil.swap(data,i,lowIndex); h9CIZU[Nh  
} ZYMw}]#((E  
} qL 5>o>J  
Oh; Jw  
} .+.j*>q>u  
658^"]Rk'/  
Shell排序: };katqzEg  
o"+ i&Wp~  
package org.rut.util.algorithm.support; vg\/DbI'  
ai-n z-;  
import org.rut.util.algorithm.SortUtil; }Dfwm)]Q  
r>n" 51*  
/** wk $,k  
* @author treeroot 5Ec/(-F  
* @since 2006-2-2 l-O$m  
* @version 1.0 2 y8~#*O  
*/ I.V:q!4*  
public class ShellSort implements SortUtil.Sort{ "/+zMLY  
SvuTc!$?  
/* (non-Javadoc) &M[f&_"8Q  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PkUd~c  
*/ !1Y&Y@ze  
public void sort(int[] data) { :1aL ?  
for(int i=data.length/2;i>2;i/=2){ f =s&n}  
for(int j=0;j insertSort(data,j,i); r4{<Z3*N  
} qx)?buAij  
} :td ~g;w  
insertSort(data,0,1); LN^f1/ b*  
} ]r/^9XaqtA  
wpo1  
/** }nrXxfu  
* @param data !a-b6Aa  
* @param j /@YCA}|/  
* @param i )&W**!(C  
*/ bbN%$/d  
private void insertSort(int[] data, int start, int inc) { pGGmA;TC1  
int temp; %s=Dj2+  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); v#oi0-9o[  
} w# y2_  
} H3KTir"on  
} gS9>N/b|  
yfj(Q s  
} dt,3"J  
3Qn!y\#  
快速排序: :#{Xuy:  
>lzA]aM$c  
package org.rut.util.algorithm.support; ` E`HVZ}  
m VxO$A,  
import org.rut.util.algorithm.SortUtil; B#l?IB~  
*dsX#Iz  
/** *b|NjwmB  
* @author treeroot ff2d @P,!  
* @since 2006-2-2 9Sg<K)Mc  
* @version 1.0 lxb zHlX  
*/ 4_=Ja2v8;`  
public class QuickSort implements SortUtil.Sort{ N|Cs=-+  
{7"0,2 Hb?  
/* (non-Javadoc) <M+R\SH-  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +pmu2}E.3  
*/ I -@?guZ r  
public void sort(int[] data) { 4,P bg|  
quickSort(data,0,data.length-1); +}kgQ^  
} x4kWLy7Sz  
private void quickSort(int[] data,int i,int j){ 4[2_,9}  
int pivotIndex=(i+j)/2; yi6N-7  
file://swap +s[\g>i  
SortUtil.swap(data,pivotIndex,j); l* dV\ B  
p~jlx~1-]  
int k=partition(data,i-1,j,data[j]); `C72sA{M.  
SortUtil.swap(data,k,j); 1=VJ&D;  
if((k-i)>1) quickSort(data,i,k-1); O1y|v[-BW  
if((j-k)>1) quickSort(data,k+1,j); v zo4g,Bj  
0D&>Gyc*0  
} X` r* ob  
/** E1V^}dn  
* @param data </~ 6f(mg  
* @param i +Ic ~ f1zh  
* @param j J./d!an  
* @return #2p#VQh  
*/ PS>x,T  
private int partition(int[] data, int l, int r,int pivot) { tjnPyaJEl  
do{ S;\R!%t_  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); {3\R|tZh,`  
SortUtil.swap(data,l,r); Pcd *">v  
} e{w>%)rcP  
while(l SortUtil.swap(data,l,r); 7'p8 a<x  
return l; A#@_V'a8  
} ;iQEkn2T|}  
9(_{`2R8  
} _S?qDG{E|  
eny/ fm  
改进后的快速排序: Z=z%$l  
PR7f(NC  
package org.rut.util.algorithm.support; m?CZQq,  
PRu&3BP  
import org.rut.util.algorithm.SortUtil; y0bq;(~X~  
#=c`of6  
/** lx0 ~>K]  
* @author treeroot 47By`Jh71  
* @since 2006-2-2 pHE}ytcT  
* @version 1.0 n%%7KTqu  
*/  Gs0H@  
public class ImprovedQuickSort implements SortUtil.Sort { U]6&b  
]wn/BG)  
private static int MAX_STACK_SIZE=4096; Tenf:Hm/k  
private static int THRESHOLD=10; $9!D\N,}]C  
/* (non-Javadoc) c WAtju?L;  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lHfe<j]  
*/ ~eh0[mF^]  
public void sort(int[] data) { VDF)zA1V  
int[] stack=new int[MAX_STACK_SIZE]; jQs>`P-CM  
b0<o  
int top=-1; 6cS>bl  
int pivot; J1ON,&[J  
int pivotIndex,l,r; `{K_/Cit  
rVSZ.+n  
stack[++top]=0; cDEJk?3+  
stack[++top]=data.length-1; G7LIdn=  
vG.9 H_&  
while(top>0){ u eb-2[=  
int j=stack[top--]; E)N<lh  
int i=stack[top--]; Q+q,!w8  
[]kN16F  
pivotIndex=(i+j)/2; )U t5+-UK  
pivot=data[pivotIndex]; ?knYY>Kzh1  
aG`;OgrH  
SortUtil.swap(data,pivotIndex,j); $0A~uDbs  
_RkuBOv@e  
file://partition i{c@S:&@^  
l=i-1; '\q f^?9  
r=j; _D7]-3uC!  
do{ ?Ke eHMu  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); wNJzwC&iQ  
SortUtil.swap(data,l,r); <PN"oa#  
} @p=AWi}\  
while(l SortUtil.swap(data,l,r); ;QCrHqRT`  
SortUtil.swap(data,l,j); eet Q}]  
yCz|{=7"j  
if((l-i)>THRESHOLD){ tAu4haa4;  
stack[++top]=i; @Yw,nQE)b  
stack[++top]=l-1; .4y>QN#VL  
} &BE  g  
if((j-l)>THRESHOLD){ 9O*_L:4o  
stack[++top]=l+1; *LC+ PZV@  
stack[++top]=j; (@0O   
} SGc8^%-`  
\00DqL(Oj`  
} 6vKS".4C  
file://new InsertSort().sort(data); sW#JjtK  
insertSort(data); Fm_y&7._  
} 13'vH]S$M  
/** ^eYqll/U  
* @param data `6Qdfmk=  
*/ sZgRt  
private void insertSort(int[] data) { IeX^4 rc(  
int temp; VhGs/5  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ![6EUMx  
} "t=hzn"~%  
} U5HKRO  
} -Ng'<7  
U:6W+p8  
} <bck~E  
tMx}*l|]  
归并排序: D#A~Nbc  
r,P1^uHx  
package org.rut.util.algorithm.support; G$zL)R8GE|  
#zUXyT#X  
import org.rut.util.algorithm.SortUtil; qm*}U3K  
0yM[Z':i'{  
/** LK9g0_  
* @author treeroot c?2MBtnu  
* @since 2006-2-2 o_M.EZO  
* @version 1.0 98jN)Nl,oD  
*/ gy: %l  
public class MergeSort implements SortUtil.Sort{ wXjFLg!g?  
=,!\~`^  
/* (non-Javadoc) gwd (N  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RPnRVJ&"Z  
*/ y4:H3Sk  
public void sort(int[] data) {  ,B<l  
int[] temp=new int[data.length]; @Y,7'0U  
mergeSort(data,temp,0,data.length-1); ^-CINt{O  
} sd#|3  
PYRd] %X  
private void mergeSort(int[] data,int[] temp,int l,int r){ ^I mP`*X  
int mid=(l+r)/2; 'uDjFQX  
if(l==r) return ; sAJ7R(p  
mergeSort(data,temp,l,mid); mV^Zy  
mergeSort(data,temp,mid+1,r); >evS} O6  
for(int i=l;i<=r;i++){ iJxQB\x  
temp=data; )QagS.L{z  
} Si 9Z>MR  
int i1=l; L(>=BK*  
int i2=mid+1; ^04Q%,  
for(int cur=l;cur<=r;cur++){ P|2E2=G  
if(i1==mid+1) u,3,ck!B>@  
data[cur]=temp[i2++]; kU-t7'?4  
else if(i2>r) IL/Yc1  
data[cur]=temp[i1++]; %ows BO+  
else if(temp[i1] data[cur]=temp[i1++]; IPSF]"}~  
else R1:k23{  
data[cur]=temp[i2++]; p R dk>Ph  
} 8mLP5s!7  
} y %$O-q  
r,goRK.  
} <!$:8ls  
t%zpNd2lk  
改进后的归并排序: lJP1XzN_  
R`";Z$~{  
package org.rut.util.algorithm.support; R:JX<Ba  
"1q>At  
import org.rut.util.algorithm.SortUtil; ,6 !rR,0  
Mr--4D0Hk  
/** SjjIr ^  
* @author treeroot q{2I_[p  
* @since 2006-2-2 E Uar/  
* @version 1.0 wfL-oi'5  
*/ M}_ i52  
public class ImprovedMergeSort implements SortUtil.Sort { _ ~RpGX  
]u-]'P  
private static final int THRESHOLD = 10; gw`B"c|  
@\oz4^  
/* &AuF]VT  
* (non-Javadoc) < _$%@4 L  
* 6ZgU"!|r  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Glq85S  
*/ YI-O{U  
public void sort(int[] data) { 04%S+y.6&Y  
int[] temp=new int[data.length]; .,~(%#Wl$  
mergeSort(data,temp,0,data.length-1); f"7M^1)h2%  
} N$Y" c*  
xR"M*%{@0  
private void mergeSort(int[] data, int[] temp, int l, int r) { ; UiwH  
int i, j, k; ;Zj]~|  
int mid = (l + r) / 2; ]Mj/&b>"e  
if (l == r) M@P 1,Y  
return; 6*l^1;U  
if ((mid - l) >= THRESHOLD) zJM S=r  
mergeSort(data, temp, l, mid); ;TcvA  
else P^MOx4  
insertSort(data, l, mid - l + 1); ;o/>JHGj  
if ((r - mid) > THRESHOLD) T,fI BD:  
mergeSort(data, temp, mid + 1, r); #U=X NU}k  
else <]C$xp<2  
insertSort(data, mid + 1, r - mid); k{tMzx]F__  
)CI1;  
for (i = l; i <= mid; i++) { T{]~07N?  
temp = data; :RSz4  
} ; )Kh;;e  
for (j = 1; j <= r - mid; j++) { N3t0-6$_  
temp[r - j + 1] = data[j + mid]; 1tCQpf  
} +,:^5{9{  
int a = temp[l]; + SZYg[  
int b = temp[r]; KucV3-I  
for (i = l, j = r, k = l; k <= r; k++) { @ZN^1?][  
if (a < b) { V&soN:HS  
data[k] = temp[i++]; TGuiNobD  
a = temp; t3Z_Dp~\  
} else { nI*/Mhx  
data[k] = temp[j--]; Ub0/r$]DK  
b = temp[j]; c4e_6=Iv  
} ^^i6|l1  
} *BD=O@  
} W$JebW<z(  
?^' 7+8C*J  
/** $d+DDm1o  
* @param data 0s#vwK13  
* @param l L?_7bX oD  
* @param i )f+U~4G&  
*/ _a_xzv'  
private void insertSort(int[] data, int start, int len) { {^{p,9  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $=sXAK9   
} ;E~4)^  
} 6*9}4`  
} Z'pQ^MO  
} -B#yy]8  
W$dn_9W  
堆排序: ?%R w(E  
@RD+xYm  
package org.rut.util.algorithm.support; Dz!fpE'L  
y`e4;*1  
import org.rut.util.algorithm.SortUtil; =U OLT>!  
uBg 8h{>  
/** wI M{pK  
* @author treeroot R8*Q$rH<  
* @since 2006-2-2 p6EDQwlf  
* @version 1.0 AJt!!crs  
*/ CZ 2`H[8  
public class HeapSort implements SortUtil.Sort{ RVtQ20e";r  
-7WW[ w  
/* (non-Javadoc) 8pLBt:  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C2]Kc{4  
*/ +i `*lBup$  
public void sort(int[] data) { T1B|w"In  
MaxHeap h=new MaxHeap(); e"-X U@`k1  
h.init(data); +ww^ev%  
for(int i=0;i h.remove(); kI*(V [i  
System.arraycopy(h.queue,1,data,0,data.length); J2GcBzRH  
} 7RU}FE  
p\wJD1s  
private static class MaxHeap{ \^+ILYO:$  
MgnM,95  
void init(int[] data){ 0?7XtC P<  
this.queue=new int[data.length+1]; n9LGP2#!  
for(int i=0;i queue[++size]=data; m!XI{F@x  
fixUp(size); pl*~kG=  
} L^kp8o^$  
} ,Y_{L|:w  
mOll5O7VW  
private int size=0; O(2cWQ  
W:&R~R  
private int[] queue; iWXc  
(lA.3 4.p  
public int get() { <dA8 '7^  
return queue[1]; k>4qkigjc  
} <Pqv;WI|R  
5`^o1nGO'  
public void remove() { #$S}3 o  
SortUtil.swap(queue,1,size--); h4&;?T S  
fixDown(1); ~ <0Z>qr  
} !Gs} tiMH  
file://fixdown CF y}r(q  
private void fixDown(int k) { fT:}Lj\L1  
int j; .W\ve>;  
while ((j = k << 1) <= size) { yT OyDm-  
if (j < size %26amp;%26amp; queue[j] j++; 4YG/`P  
if (queue[k]>queue[j]) file://不用交换 3{raKM6F  
break; T*2C_oW  
SortUtil.swap(queue,j,k); KV!<Oq  
k = j; huFz97?y(  
} yT /EHmJ  
} hp!d/X=J_  
private void fixUp(int k) { Zp`T  
while (k > 1) { :bM+&EP  
int j = k >> 1; U0B2WmT~Q  
if (queue[j]>queue[k]) ={(j`VSUX0  
break; I\P Bu$Ww  
SortUtil.swap(queue,j,k); @B1{r|-<^  
k = j; ^~ =9  
} b=##A  
} bPD)D'Hs  
IxSV?k   
} uq7T{7~<  
}amU[U,  
} n"{X!(RIcx  
U)jUq_LX  
SortUtil: Eyh|a. )-  
^t. W|teD  
package org.rut.util.algorithm;  I?Y d   
,krS-.  
import org.rut.util.algorithm.support.BubbleSort; y%BX]~  
import org.rut.util.algorithm.support.HeapSort; .:1qK<vz  
import org.rut.util.algorithm.support.ImprovedMergeSort; ,cHU) j  
import org.rut.util.algorithm.support.ImprovedQuickSort; 0A$SYF$O+[  
import org.rut.util.algorithm.support.InsertSort; ^tAO_~4  
import org.rut.util.algorithm.support.MergeSort; w8M2N]&:  
import org.rut.util.algorithm.support.QuickSort; q|#MB7e/  
import org.rut.util.algorithm.support.SelectionSort;  y).P=z  
import org.rut.util.algorithm.support.ShellSort; LVtu*k   
_g|acBF  
/** WO</Q6+  
* @author treeroot Q}vbm4)[  
* @since 2006-2-2 83;IyvbL  
* @version 1.0 s"#]L44N  
*/ )q^ Bj$  
public class SortUtil { ~uaP$*B[  
public final static int INSERT = 1; \P?ToTTV  
public final static int BUBBLE = 2; :X>DkRP  
public final static int SELECTION = 3; ?X_V#8JK  
public final static int SHELL = 4; # mT]j""  
public final static int QUICK = 5; 1M5 -pZ[D  
public final static int IMPROVED_QUICK = 6; Ek .3  
public final static int MERGE = 7; ,+L KJl  
public final static int IMPROVED_MERGE = 8; +uQB rG  
public final static int HEAP = 9; 7 ^I:=qc72  
(!zM\sF  
public static void sort(int[] data) { T!^Mvat  
sort(data, IMPROVED_QUICK); }5gr5g\OtP  
} Aka^e\Y@6*  
private static String[] name={ T0 |H9>M  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4,}GyVJFb`  
}; 'V!kL, 9ES  
D s-`  
private static Sort[] impl=new Sort[]{ =MSu3<y,  
new InsertSort(), #ooc)),  
new BubbleSort(), |-kEGLH[*V  
new SelectionSort(), (([I]q  
new ShellSort(), K5flit4-  
new QuickSort(), DX@}!6|T  
new ImprovedQuickSort(), Jp ]T9W\  
new MergeSort(), *8\(FVyG^  
new ImprovedMergeSort(), {'~sS  
new HeapSort() @>O&Cpt  
}; \iZ1W  
6E+=Xi  
public static String toString(int algorithm){ 9*pG?3*I  
return name[algorithm-1]; epVH.u%  
} -CU,z|g+  
T-P@u-DU  
public static void sort(int[] data, int algorithm) { L>nO:`>h  
impl[algorithm-1].sort(data); X <xqT  
} < l[` "0  
`pYE[y+  
public static interface Sort { eTZ`q_LfI1  
public void sort(int[] data); q<XcOc5  
} (3fPt;U  
/=M.-MU2  
public static void swap(int[] data, int i, int j) { 3wNN<R  
int temp = data; qJMp1DC  
data = data[j]; oNSz&)LP  
data[j] = temp; a;p6?kv  
} nHU3%%%cU  
} #$uZDQY_  
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