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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。 @3^D[  
插入排序: \ oY/hT_  
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package org.rut.util.algorithm.support; cEdf&*_-'I  
uwL^Tq}Yh  
import org.rut.util.algorithm.SortUtil; cuw 7P  
/** e9LP!"@EY  
* @author treeroot %>z4hH,  
* @since 2006-2-2 %9 q]  
* @version 1.0 F K7cDaI  
*/ |)Q#U$ m  
public class InsertSort implements SortUtil.Sort{ 6#J>b[Q  
gwA+%]  
/* (non-Javadoc) N$!aP/b  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *?JNh;  
*/ qG6?k}\\  
public void sort(int[] data) { "jUM}@q5  
int temp; G!u+~{g  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); {Vw\#/,  
} 6>yfm4o  
} >U~{WM$"Y  
} `{Jo>L .  
a-cLy*W,~  
} 3P.v#TEst  
bwC~  
冒泡排序: &H4Y`xV^=  
s|`ZV^R  
package org.rut.util.algorithm.support; yd}1Mx  
?rJe"TOIy  
import org.rut.util.algorithm.SortUtil; 8 t)?$j$  
PM?F;mj  
/** K9HXy*y49  
* @author treeroot 5LX%S.CW  
* @since 2006-2-2 < dD)>Y.  
* @version 1.0 r6b;v2!8  
*/ cXd?48O  
public class BubbleSort implements SortUtil.Sort{ ee}HQ.}Ja  
up@I,9C/  
/* (non-Javadoc) 8PB 8h  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FwjmC%iY  
*/ +W%3VV$  
public void sort(int[] data) { % tE#%;Z  
int temp; NimW=X;c  
for(int i=0;i for(int j=data.length-1;j>i;j--){ G<$ N*3  
if(data[j] SortUtil.swap(data,j,j-1); TwI'}J|w  
} \) FFV-k5  
} tKX+eA]  
} Hrg~<-.La  
} S;8gX1Uf  
;:]#Isq  
} 3J_B uMV  
(-[73v-w  
选择排序: F1q6 3  
tkX?iqKQ  
package org.rut.util.algorithm.support; s=H| ^v  
8#{DBWU  
import org.rut.util.algorithm.SortUtil; Yo*.? Mq'  
E]0}&YG  
/** 9 WO|g[Y3  
* @author treeroot [["az'Lrk?  
* @since 2006-2-2 IA;'5IF  
* @version 1.0 c gOkm}h  
*/ "g%=FH3e  
public class SelectionSort implements SortUtil.Sort { ED;rp 9(  
YApm)O={  
/* $`&zIz  
* (non-Javadoc) y2o~~te  
* Bln($lOz  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v,d bto0  
*/ *DcB?8%  
public void sort(int[] data) { y,xJ5BI$  
int temp; !de`K |  
for (int i = 0; i < data.length; i++) { Rn_FYP  
int lowIndex = i; BW x=Q  
for (int j = data.length - 1; j > i; j--) { Js'j}w  
if (data[j] < data[lowIndex]) { tJvs ?eZ)  
lowIndex = j; _'0C70  
} O>3f*Cc  
} pGdFeEkB/  
SortUtil.swap(data,i,lowIndex); \\)9QP?  
} >3?p23|;  
} UGP,/[XI  
aCF=Og  
} g2%fla7r  
wZ%a:Z4TcM  
Shell排序: #oD;?Mi  
$4:Se#nl  
package org.rut.util.algorithm.support; a{@gzB  
Db K(Rh_ K  
import org.rut.util.algorithm.SortUtil; Yv/T6z@  
ZZ324UuATX  
/** gZ>) S@  
* @author treeroot oe*CZ  
* @since 2006-2-2 P[%nD cB  
* @version 1.0 #GuN.`__n,  
*/ -R-yr.$j*  
public class ShellSort implements SortUtil.Sort{ =mYwO=:D  
Y=ksrs>w  
/* (non-Javadoc) =$-+~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a797'{j#PI  
*/ 2_Gb K-  
public void sort(int[] data) { ]ne  
for(int i=data.length/2;i>2;i/=2){ isU4D  
for(int j=0;j insertSort(data,j,i); *6aIDFNl  
} \P;2s<6i\  
} jdX *  
insertSort(data,0,1); 85_Qb2<'r  
} (3?W) i  
n.7-$1  
/** >zo_}A!  
* @param data rlQ=rNrG&E  
* @param j wE3fKG.  
* @param i LUzn7FZk  
*/ hjq@ .5  
private void insertSort(int[] data, int start, int inc) { *t300`x  
int temp; R.Kz nJ  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); 6E{(_i  
} 2&zklXuo:  
} 9/JB n  
} V~sfR^FQ'  
Vr:`?V9Q2(  
} C@3UsD\s(  
mRIBE9K+&  
快速排序: im@QJ :  
97k}{tG  
package org.rut.util.algorithm.support; MNf^ml[  
1G8,Eah  
import org.rut.util.algorithm.SortUtil; Vt(s4  
`>& K=C?  
/** 8`z  
* @author treeroot DJb9] ,=a  
* @since 2006-2-2 # TZ`   
* @version 1.0 o]DYS,v  
*/ L:\>)6]Ls  
public class QuickSort implements SortUtil.Sort{ bT MgE Y  
LSrKi$   
/* (non-Javadoc) { u3giB  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eig{~3  
*/ g?N^9B,$2  
public void sort(int[] data) { |RL\2j|  
quickSort(data,0,data.length-1); ,WBKN)%u  
} iGN6'm`  
private void quickSort(int[] data,int i,int j){ E:y^= Y  
int pivotIndex=(i+j)/2; n.XgGT=L  
file://swap -TS5g1  
SortUtil.swap(data,pivotIndex,j); ,AH2/^:%c  
q[(1zG%NbA  
int k=partition(data,i-1,j,data[j]); XXA.wPD-  
SortUtil.swap(data,k,j); |W*5<2Q9  
if((k-i)>1) quickSort(data,i,k-1);  I)MRAo  
if((j-k)>1) quickSort(data,k+1,j); j&[u$P*K  
~KczP1p  
} 3e9UDN2  
/** ]app9  
* @param data #nq_R  
* @param i %-[*G;c'w  
* @param j $Lz!04  
* @return (9{qT>eJg=  
*/ &$ fyY:<\  
private int partition(int[] data, int l, int r,int pivot) { WWTRB +1>  
do{ z.^_;Vql_  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); f!F5d1N  
SortUtil.swap(data,l,r); 1\J9QZX0  
} i>KgkRZL#  
while(l SortUtil.swap(data,l,r); P#}vi$dZ  
return l; [#(',~lN7  
} rv c%[HfW;  
1DlXsup&?#  
} vX_;Y#uD  
?R_fg  
改进后的快速排序: A b+qLh&?  
S`Z[MNY  
package org.rut.util.algorithm.support; NA$%Up  
6xFchdMG{m  
import org.rut.util.algorithm.SortUtil; Dutc#?bT  
I|wC`VgB  
/** B`YD>oCN  
* @author treeroot `A#0If  
* @since 2006-2-2 -2j[;kgt}  
* @version 1.0 ' e %>Ip  
*/ ~x^Ra8A  
public class ImprovedQuickSort implements SortUtil.Sort { 9&{z?*  
qP-_xpu]R  
private static int MAX_STACK_SIZE=4096; sL,|+>7T^M  
private static int THRESHOLD=10; -EP(/CS!  
/* (non-Javadoc) RL[F 9g  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xo4lM  
*/ [+L!c}#  
public void sort(int[] data) { RKZBI?@4  
int[] stack=new int[MAX_STACK_SIZE]; i-9W8A  
fmD~f  
int top=-1; +BDW1%  
int pivot; qcC(#0A>  
int pivotIndex,l,r; !<out4Mz"  
E;, __  
stack[++top]=0; 3 2"f'{  
stack[++top]=data.length-1; T[<554  
raZkH8  
while(top>0){ ?_r{G7|D  
int j=stack[top--]; G7i0P j  
int i=stack[top--]; /|3~LvIt=  
KWM.e1(  
pivotIndex=(i+j)/2; .<Ays?  
pivot=data[pivotIndex]; y\,,hs  
zK>m4+)~  
SortUtil.swap(data,pivotIndex,j); mDk6@Gd@U  
\58bz<u"  
file://partition U "r)C;5  
l=i-1; ;NQ}c"9  
r=j; ky&wv+7  
do{ o_BRsJy  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); u}P:9u&h6X  
SortUtil.swap(data,l,r); dc0&*/`:  
} ^rd%{ 6m  
while(l SortUtil.swap(data,l,r); K{,'%|  
SortUtil.swap(data,l,j); Vl3-cW@p  
Z>l|R C  
if((l-i)>THRESHOLD){ *U}-Y*  
stack[++top]=i; #U4 f9.FY*  
stack[++top]=l-1; xel|,|*Yq  
} 5V~vND* s  
if((j-l)>THRESHOLD){ 'h^Ya?g  
stack[++top]=l+1; *3]2vq  
stack[++top]=j; Kz z/]  
} +43~4_Oj  
,N;2"$+E  
} dkY JO!  
file://new InsertSort().sort(data); =M}tet }  
insertSort(data); It<VjN9  
} ^I yYck'y+  
/** u'k+t`V&  
* @param data [LQOP3f  
*/ IG7,-3  
private void insertSort(int[] data) { 6Q J.=.>b  
int temp; C]fX=~?bGQ  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ?JTTl;  
} [-i&)eX  
} P#Whh  
} 1k^$:'  
F|VKrH.  
} We\i0zUU  
s:iBl/N}  
归并排序: c`&g.s@N\  
>ts}\.(]  
package org.rut.util.algorithm.support; R]o0V*n  
d`C$vj  
import org.rut.util.algorithm.SortUtil; NFP h}D  
R*D5n>~  
/** *]}F=dtR k  
* @author treeroot `'*4B_.  
* @since 2006-2-2 :_]0 8  
* @version 1.0 ?6>*mdpl  
*/ 4q:8<*W=  
public class MergeSort implements SortUtil.Sort{ J}+N\V~  
;(jL`L F  
/* (non-Javadoc) }K`KoM  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j8 `7)^  
*/ UbGnU_}  
public void sort(int[] data) { }_F:]lI*R  
int[] temp=new int[data.length]; hW9!  
mergeSort(data,temp,0,data.length-1); d[5v A/8O  
} |@d}O8  
=HJ7tele  
private void mergeSort(int[] data,int[] temp,int l,int r){ Nr+~3:3  
int mid=(l+r)/2; OCJt5#e~A  
if(l==r) return ; ~ ^D2]j  
mergeSort(data,temp,l,mid); ^Sj;~  
mergeSort(data,temp,mid+1,r); 4P=1)t?tX  
for(int i=l;i<=r;i++){ ,G-  
temp=data; ~wF3$H.@;  
} .{ZJywE<  
int i1=l; J7C?Z  
int i2=mid+1; HG< z,gE 2  
for(int cur=l;cur<=r;cur++){ -T i<H9OV  
if(i1==mid+1) IW>~Yl?  
data[cur]=temp[i2++]; B/qN1D]U.  
else if(i2>r) l'M/et{:  
data[cur]=temp[i1++]; Q+wO\TtE  
else if(temp[i1] data[cur]=temp[i1++]; U;*t5l  
else sDR Av%w  
data[cur]=temp[i2++]; YJ-<t6  
} + !" Y C  
} xpCZlOld  
7[uN;B#V  
} 'r ^ .Ao5  
w{lj'3z I  
改进后的归并排序: r%WHYhD  
Oo-4WqRJ  
package org.rut.util.algorithm.support; tQYV4h\Qj  
eK5~gnv,  
import org.rut.util.algorithm.SortUtil; 2{Dnfl'k  
<#;5)!gr{  
/** Qds:*]vGS  
* @author treeroot UZmUYSu;  
* @since 2006-2-2 B0A y  
* @version 1.0 Mw"[2PA  
*/ 8a]g>g  
public class ImprovedMergeSort implements SortUtil.Sort { 7=yjd)Iy9m  
w ^^l,  
private static final int THRESHOLD = 10; ,3iD/8_  
0v9i43[S|J  
/* n/ :#:  
* (non-Javadoc) Iw`|,-|  
* jcvq:i{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _?y3&4N)  
*/ |Kjfh};-C  
public void sort(int[] data) { xLLTp7b(  
int[] temp=new int[data.length]; 'p\&Mc_Gu  
mergeSort(data,temp,0,data.length-1); Cg%Owe/E?0  
} $T:;Kc W)  
kOdpW  
private void mergeSort(int[] data, int[] temp, int l, int r) { iOCs% J  
int i, j, k; ;K|K]c  
int mid = (l + r) / 2; f2pA+j5[  
if (l == r) ^c/3 !"wK  
return; <gGO  
if ((mid - l) >= THRESHOLD) b<#zgf  
mergeSort(data, temp, l, mid); SK&1l`3  
else t9*e"QH  
insertSort(data, l, mid - l + 1); (3Xs  
if ((r - mid) > THRESHOLD) [{R>'~  
mergeSort(data, temp, mid + 1, r); Z]WX 7d  
else __s'/ 6u  
insertSort(data, mid + 1, r - mid); |,S]EHIy  
nUVk;0at  
for (i = l; i <= mid; i++) { w-$iKtb.  
temp = data; V@s93kh  
} ,)!%^ ~v  
for (j = 1; j <= r - mid; j++) { ntB#2S  
temp[r - j + 1] = data[j + mid]; ,quUGS  
} BFP@Yn~k  
int a = temp[l]; {oF;ZM'r  
int b = temp[r]; Vr"'O6  
for (i = l, j = r, k = l; k <= r; k++) { ^+-]V9?+  
if (a < b) { s]`6u yW"  
data[k] = temp[i++]; 2 M\7j  
a = temp; n@h$V\&\iM  
} else { `F1Yfm jZT  
data[k] = temp[j--]; yS:w>xU @<  
b = temp[j]; ~;pP@DA  
} B0p;Zh  
} _3N,oCRm  
} T][c^K*  
l+@k:IK  
/** +t1+1 Zv  
* @param data QmGK! H>3  
* @param l l Le&q  
* @param i "X._:||8  
*/ U(x$&um(l  
private void insertSort(int[] data, int start, int len) { y!:vX6l  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zFipuG02  
} \L$]2"/v-  
} 8tf>G(I{  
} ]]`[tVaFr  
} Z,\(bW qF  
N%q{CYF6  
堆排序: ;14Q@yrZ0  
fhR u-  
package org.rut.util.algorithm.support; sh0x<_  
Q%!xw(  
import org.rut.util.algorithm.SortUtil; 7<(U`9W/q  
hH-!3S2'  
/** 59:kL<;S-  
* @author treeroot "R-j  
* @since 2006-2-2 oRcP4k;d=  
* @version 1.0 n ~&ssFC  
*/ wv\"(e7(  
public class HeapSort implements SortUtil.Sort{ r4gLoHD)  
'Z,7{U1P  
/* (non-Javadoc) *%_M?^  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xkx&'/QG,U  
*/ pNuU{:9 B0  
public void sort(int[] data) { nehk8+eV_  
MaxHeap h=new MaxHeap(); F.(e}EMyNh  
h.init(data); n!~QC  
for(int i=0;i h.remove(); 0R+p\Nc&1  
System.arraycopy(h.queue,1,data,0,data.length); wt'"<UN  
} ){u# (sW  
j5[ >HL  
private static class MaxHeap{ 1|G5 W:  
p14$XV  
void init(int[] data){ k%-UW%  
this.queue=new int[data.length+1]; ?$<~cD" Sw  
for(int i=0;i queue[++size]=data; CI \O)iB  
fixUp(size); Bd;EI)JT  
} \>w 2D  
} L"?4}U:  
L8zMzm=-  
private int size=0; x 2l}$(7  
N>P" $  
private int[] queue; f4dHOH  
prIJjy-F  
public int get() { Oq3t-omXS  
return queue[1]; !^1oH**  
} @^-f +o  
}095U(@  
public void remove() { ov\%*z2=  
SortUtil.swap(queue,1,size--); 673G6Nk  
fixDown(1); Zw/??Tq b  
} cZrJW  
file://fixdown yd45y}uS;F  
private void fixDown(int k) { U}=H1f,  
int j; M3GFKWQI,`  
while ((j = k << 1) <= size) { 6OQ\f,h@  
if (j < size %26amp;%26amp; queue[j] j++; (f#{<^gd  
if (queue[k]>queue[j]) file://不用交换 JE$ $6X  
break; LA6Ik_-F  
SortUtil.swap(queue,j,k); rXe+#`m2  
k = j; eB,@oo%  
} Tn38]UL  
} %F;uW[4r  
private void fixUp(int k) { z!~{3M  
while (k > 1) { }y*rO(cu7G  
int j = k >> 1; 9~iDL|0'~  
if (queue[j]>queue[k]) 5:EE%(g9  
break; 0d`lugf  
SortUtil.swap(queue,j,k); ?4Zo0DiUB  
k = j; #X5Tt  ;  
} N$ 2Iz  
} vDc&m  
*iPBpEWC  
} N$Tzxs  
n.P $E  
} f-}_  
+]VW[ $W  
SortUtil: . ve a[  
8{CBWXo$)  
package org.rut.util.algorithm; pSpxd |k  
GMob&0l8_  
import org.rut.util.algorithm.support.BubbleSort; HuD~(CI.  
import org.rut.util.algorithm.support.HeapSort; O0mQHpi:  
import org.rut.util.algorithm.support.ImprovedMergeSort; AAc2u^spx  
import org.rut.util.algorithm.support.ImprovedQuickSort; +2s][^-KV  
import org.rut.util.algorithm.support.InsertSort; z}7U>y6`  
import org.rut.util.algorithm.support.MergeSort; E `%*lGu_  
import org.rut.util.algorithm.support.QuickSort; P$`k* v  
import org.rut.util.algorithm.support.SelectionSort; &=.7-iC|W  
import org.rut.util.algorithm.support.ShellSort; .Na'yS `J  
k~$}&O  
/** M:K4o%  
* @author treeroot SR9M:%dga  
* @since 2006-2-2 ` B+Pl6l)F  
* @version 1.0 Pj*"2 LBW#  
*/ -9"[/  
public class SortUtil { (i^<er q  
public final static int INSERT = 1; k,[[ CZ0j  
public final static int BUBBLE = 2; 8.' THLI  
public final static int SELECTION = 3; `SYq/6$VEH  
public final static int SHELL = 4; 7)Bizlf  
public final static int QUICK = 5; I{u+=0^Y  
public final static int IMPROVED_QUICK = 6; #j"N5e}U  
public final static int MERGE = 7; ^c>ROpic  
public final static int IMPROVED_MERGE = 8; AiV1 vD`  
public final static int HEAP = 9; X,+N/ nku  
Otm7j>w  
public static void sort(int[] data) { "I[u D)$  
sort(data, IMPROVED_QUICK); {=E,.%8  
} !f8]gTzN  
private static String[] name={ 4({Wipd  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ew8Manx  
}; LBhDP5qF  
HwZ@T &_4  
private static Sort[] impl=new Sort[]{ v;R+{K87  
new InsertSort(), 0 aiE0b9c  
new BubbleSort(), T7 XbbU  
new SelectionSort(), D4QL lP  
new ShellSort(), ZL- ` 3x  
new QuickSort(), zLVk7u{e  
new ImprovedQuickSort(), :}fIu?hCA  
new MergeSort(), DYL\=ya1  
new ImprovedMergeSort(), &vS@-K  
new HeapSort() ",Fqpu&M  
}; 0kld77tn 2  
Csx??T_>r  
public static String toString(int algorithm){ ~`Rooh3m  
return name[algorithm-1]; @LDu08lr  
} }F)eA1  
~^"s.Lsb  
public static void sort(int[] data, int algorithm) { +WFa4NZ  
impl[algorithm-1].sort(data); !tv+,l&L  
} N< 7  
\EeK<)4:  
public static interface Sort { >`.$Tyw  
public void sort(int[] data); gS ^Y?  
} \ >|:URnD  
Ezw<  
public static void swap(int[] data, int i, int j) { Zk 9i}H  
int temp = data; x?-kt.M  
data = data[j]; .&c!k1kH  
data[j] = temp; DP7B X^e  
} Pt %EyFG  
} BYsQu.N  
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