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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。 -, +o*BP  
插入排序: 1 k!gR  
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package org.rut.util.algorithm.support; ,q*|R O  
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import org.rut.util.algorithm.SortUtil; 0faf4LzU!  
/** VsA_x  
* @author treeroot JSg=9p$  
* @since 2006-2-2 nIH(2j  
* @version 1.0 yi^X?E{WnX  
*/ 7NEOaX(J9  
public class InsertSort implements SortUtil.Sort{ <w&'E6mU  
A#$l;M.3R  
/* (non-Javadoc)  '0f!o&?g  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J|xXo  
*/ -AnJLFY  
public void sort(int[] data) { ~%\vX  
int temp; oxFd@WV5  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);  e$  
} ~JZLWTEe  
} eZ) |m  
} CMC p7- v  
tln}jpCw  
} y2%[/L: u~  
em'3 8L|(  
冒泡排序: tDAX pi(  
`LFT"qnp  
package org.rut.util.algorithm.support; W[QgddR  
KUW )F  
import org.rut.util.algorithm.SortUtil; <> =(BAw  
9on$0  
/** ?z`yNx6  
* @author treeroot v*excl~  
* @since 2006-2-2 4-O.i\1q  
* @version 1.0 ~DLxIe  
*/ \R&ZWJKh  
public class BubbleSort implements SortUtil.Sort{ aQhT*OT{Q  
rDaiA x&  
/* (non-Javadoc) b0f6?s  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |{M F o)  
*/ bjUe+ #BL  
public void sort(int[] data) { "7 alpjwb  
int temp; 2aivc,m{r  
for(int i=0;i for(int j=data.length-1;j>i;j--){ &}gH!5L m  
if(data[j] SortUtil.swap(data,j,j-1); ]mBlXE:Z  
} #)D$\0ag  
} 7TX$  
} Q-_;.xy#4  
} a&)$s;  
]$K58C  
} -b%' K}.C  
U&kdR+dB  
选择排序: ADP[KZO$ 4  
ke*&*mx"L  
package org.rut.util.algorithm.support; )$Fw<;4  
@ 6jKjI  
import org.rut.util.algorithm.SortUtil; ;).QhHeg>  
`5t~ Vlp  
/** 99h#M3@!  
* @author treeroot /\jRr7 Cd  
* @since 2006-2-2 %|}7YH41  
* @version 1.0 l5e`m^GK  
*/ K(mzt[n(  
public class SelectionSort implements SortUtil.Sort { C/"Wh=h6  
ORo +]9)Yv  
/* O6-"q+H)  
* (non-Javadoc) F8m@mh*8>  
* j~2t^Qz  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VjSbx'i  
*/ USf;}F:-C  
public void sort(int[] data) { tV.96P;)/9  
int temp; r-BqIoVT  
for (int i = 0; i < data.length; i++) { aj+I+r"~  
int lowIndex = i; $I@. <J*  
for (int j = data.length - 1; j > i; j--) { x@@k_'~t%  
if (data[j] < data[lowIndex]) { e]jzFm~  
lowIndex = j; D>#Jh>4  
} 9 LEUj  
} $<wU>X  
SortUtil.swap(data,i,lowIndex); 6l?KX  
} >*w(YB]/$V  
} d cht8nX7~  
%c c<>Hi  
} wd:SBU~f5*  
vP<8 ,XG  
Shell排序: >>7m'-k%D  
$_Lcw"xO  
package org.rut.util.algorithm.support; 5[qx5|O  
fwyz|>H_Y(  
import org.rut.util.algorithm.SortUtil; 5#? HL  
9T;l*  
/** QEL3b4Vm  
* @author treeroot 1K$8F ~%Z  
* @since 2006-2-2 47/YD y%  
* @version 1.0 A^7Y%  
*/ &_6B{Q  
public class ShellSort implements SortUtil.Sort{ z2V_nkI  
hzk]kM/OC  
/* (non-Javadoc) iGeuO[ ^  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F[|aDj@q e  
*/ \h/aD1 &g  
public void sort(int[] data) { l< |)LD q~  
for(int i=data.length/2;i>2;i/=2){ r+l3J>:K  
for(int j=0;j insertSort(data,j,i); q(@hYp#O"3  
} i3y>@$fRL\  
} 'v3> "b  
insertSort(data,0,1); _EZrZB  
} b~;+E#[*  
a U*cwR  
/** ab5z&7Re6  
* @param data {wf e!f  
* @param j [.iz<Yh  
* @param i oxm3R8 S  
*/ hz+x)M`Y  
private void insertSort(int[] data, int start, int inc) { OGO4~Up  
int temp; $5l=&  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); T%:W6fH7  
} <N;HB&mr  
} [^-DFq5@  
}  t"'aQr  
Y_&)>;  
} G&*2h2,]  
)![? JXf  
快速排序: ('p~h-9Vi  
Ik|nL#JH]  
package org.rut.util.algorithm.support; n.xW"omN  
?g'? Ou  
import org.rut.util.algorithm.SortUtil; *9Nq^+  
Yf(QU`w_  
/** Go_~8w0<  
* @author treeroot )Wm:Ilq  
* @since 2006-2-2 DbkKmv&  
* @version 1.0 pEE.%U  
*/ 2V#(1Hc!  
public class QuickSort implements SortUtil.Sort{ . ),m7"u|  
_gF )aE  
/* (non-Javadoc) Dx27s  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f?A*g$v  
*/ i/U HDqZ  
public void sort(int[] data) { Ik4U+'z6  
quickSort(data,0,data.length-1); &<sDbN S  
} j!P]xl0vOZ  
private void quickSort(int[] data,int i,int j){ H6XlSj  
int pivotIndex=(i+j)/2; )W/ mt[;  
file://swap V"@]PI pr  
SortUtil.swap(data,pivotIndex,j); #4*~ 4/  
vN%SN>=L<  
int k=partition(data,i-1,j,data[j]); (-(sBQa+  
SortUtil.swap(data,k,j); #Hr>KQ5mJQ  
if((k-i)>1) quickSort(data,i,k-1); ZK@ENfG  
if((j-k)>1) quickSort(data,k+1,j); H?>R#Ds-  
!7-dqw%l  
} ?8Hr 9  
/** !8U\GR `  
* @param data .pOTIRbA  
* @param i ^i^/d#  
* @param j 0Y9\,y_  
* @return Iw$7f kq  
*/ V1j5jjck  
private int partition(int[] data, int l, int r,int pivot) { qJN2\e2~f  
do{ /r Hd9^Y  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Hb;#aXHSd  
SortUtil.swap(data,l,r); *.J)7~(P  
} #yk m  
while(l SortUtil.swap(data,l,r); ]QS? fs Z  
return l; tQ:)j^\  
} Ln})\ UDK)  
s^b2H !~  
} /gKX%`ZF/r  
!(soMv  
改进后的快速排序: ["\Y-6"l  
iii2nmiK  
package org.rut.util.algorithm.support; !;^sIoRPV  
nDS mr  
import org.rut.util.algorithm.SortUtil; (JHL0Z/  
0BM3:]=wr  
/** )q\|f_  
* @author treeroot TC4W7} }  
* @since 2006-2-2 v'*#P7%Kf  
* @version 1.0 g,!6, v@  
*/ 1#9Q1@'OS  
public class ImprovedQuickSort implements SortUtil.Sort { MGd 7Ont  
&C+pen) Z  
private static int MAX_STACK_SIZE=4096; nxP>IfSA  
private static int THRESHOLD=10; eFUJASc  
/* (non-Javadoc) wTGH5}QZ+  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mpBSd+ ;Z  
*/ `2y2Bk  
public void sort(int[] data) { brGUK PB  
int[] stack=new int[MAX_STACK_SIZE]; ([='LyH];z  
R;gN^Yjk:  
int top=-1; PG8|w[V1"  
int pivot; I_IDrS)O  
int pivotIndex,l,r; 9GuG"^08  
hGx)X64Mw  
stack[++top]=0; Lc!% 3,#.  
stack[++top]=data.length-1; |>(;gr/5(  
jX79Nm|  
while(top>0){ PYYOC"$  
int j=stack[top--]; S$Tc\ /{  
int i=stack[top--]; ,25Qhz]  
`Pv[A  
pivotIndex=(i+j)/2; C{<qc,!4  
pivot=data[pivotIndex]; [ 44d(P'  
.AOf-a  
SortUtil.swap(data,pivotIndex,j); ~ r6qnC2  
Tp&03  
file://partition E4aCL#}D  
l=i-1; oX@0+*"  
r=j; #y"E hwF  
do{ Re**)3#gn  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); b/='M`D}#G  
SortUtil.swap(data,l,r); n0:Y* Op  
} JB~79Lsdz  
while(l SortUtil.swap(data,l,r); NWuS/Ur`9  
SortUtil.swap(data,l,j); .V9/0  
mr]IxTv  
if((l-i)>THRESHOLD){ ({g7{tUy^H  
stack[++top]=i; Gk0f#;  
stack[++top]=l-1; #8G (r9  
} w:P$ S  
if((j-l)>THRESHOLD){ y{ReQn3> y  
stack[++top]=l+1; @sRUl ,M;Z  
stack[++top]=j; r7r>1W%4  
} U)%gzXTZ%  
x'OE},>i  
} s_A<bW566F  
file://new InsertSort().sort(data); [!B($c|\  
insertSort(data); st"uD\L1p:  
} {#aW")x^#  
/** > Q+Bw"W<  
* @param data ]42bd  
*/ u/3 4E=  
private void insertSort(int[] data) { 3>Ts7 wM  
int temp; p}%T`e=Z9  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 01VEz 8[\  
} M[N$N`9  
} B:om61Dn  
} `x2Q:&.H`  
Q%6 1_l  
} -NW7ncB|  
Sdl1k+u  
归并排序: u6{= Z:  
,*SoV~  
package org.rut.util.algorithm.support; [hE0 9W  
j] \3>.  
import org.rut.util.algorithm.SortUtil; Z?yMy zT  
v`ckvl)(C  
/** Z<6XB{Nh\  
* @author treeroot 3[plwe  
* @since 2006-2-2 1'wwwxe7  
* @version 1.0 rcUXYJCh-  
*/ 5(0f"zY  
public class MergeSort implements SortUtil.Sort{ (he cvJ  
7/nnl0u8  
/* (non-Javadoc) $Cw> z^}u  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !e?g"5r{Bv  
*/ dGf:0xE"  
public void sort(int[] data) { x#ub % t  
int[] temp=new int[data.length]; .}W#YN$  
mergeSort(data,temp,0,data.length-1); JX%B_eUlAs  
} ,;LxFS5\  
t .*z)N  
private void mergeSort(int[] data,int[] temp,int l,int r){  B@Acm  
int mid=(l+r)/2; /g}2QmvH  
if(l==r) return ; f$Fa*O-  
mergeSort(data,temp,l,mid); cn1UFmT  
mergeSort(data,temp,mid+1,r); -I-u.!  
for(int i=l;i<=r;i++){ v o vc,4}  
temp=data; 7'g'qUW+~  
} by z2u  
int i1=l; ,f ..46G  
int i2=mid+1; {[~cQgCI  
for(int cur=l;cur<=r;cur++){ 0F$;]zg  
if(i1==mid+1) %$K2$dq5  
data[cur]=temp[i2++]; "L yMw){  
else if(i2>r) #-b0U[,.  
data[cur]=temp[i1++]; g.![>?2$8  
else if(temp[i1] data[cur]=temp[i1++]; <BoDLvW>  
else Y)*5M  
data[cur]=temp[i2++]; W`HO Q  
} oG5 :]/F  
} q3a`Y)aVB  
FV>j !>Y  
} am >X7  
y5;l?v94  
改进后的归并排序: $2u^z=`b!%  
;8z40cD  
package org.rut.util.algorithm.support; i[obQx S94  
U40adP? a  
import org.rut.util.algorithm.SortUtil; o4I&?d7;"  
|DAe2RK  
/** >_3+s~  
* @author treeroot 2$8#ePyq*  
* @since 2006-2-2 (#6E{@eq  
* @version 1.0 rO8Q||@>A  
*/ NHKIZx8sR  
public class ImprovedMergeSort implements SortUtil.Sort { kkfwICBI  
Q2[@yRY/z  
private static final int THRESHOLD = 10; N\ nr  
)aY^k|I  
/* n{oRmw-  
* (non-Javadoc) +3B^e%`NPm  
* "YLH]9"=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *LnY}#  
*/ ?@W=bJ8{  
public void sort(int[] data) { c5~d^  
int[] temp=new int[data.length]; NPjh2 AJm  
mergeSort(data,temp,0,data.length-1); #$trC)?~q  
} o(iv=(o  
Q}# 5mf&cD  
private void mergeSort(int[] data, int[] temp, int l, int r) { .{6?%lt  
int i, j, k; n^O Wz4  
int mid = (l + r) / 2; DoV<p?U  
if (l == r) HD"Pz}k4  
return; -~z]ut<Z  
if ((mid - l) >= THRESHOLD) CS[[TzC=5  
mergeSort(data, temp, l, mid); P $4h_dw  
else vwZd@%BO  
insertSort(data, l, mid - l + 1); S,&tKDJn  
if ((r - mid) > THRESHOLD) GtZkzVqLd  
mergeSort(data, temp, mid + 1, r); .eQIU$Kw!O  
else V&)lS Qw  
insertSort(data, mid + 1, r - mid); +QS7F`O  
B-63IN  
for (i = l; i <= mid; i++) { }T!2IaAB  
temp = data; AEx|<E0  
} UPtWj8h  
for (j = 1; j <= r - mid; j++) { W)rE_tw,|  
temp[r - j + 1] = data[j + mid]; z0ULB? *"  
} u+7B-l=u*  
int a = temp[l]; YLc 2:9  
int b = temp[r]; `V N $ S  
for (i = l, j = r, k = l; k <= r; k++) { "]BefvE  
if (a < b) { 4fe$0mye  
data[k] = temp[i++]; /($!("b  
a = temp; cI#2MjL  
} else { |E+tQQr%'  
data[k] = temp[j--]; v]*(Wd~|  
b = temp[j]; FS.z lk\D=  
} _;*|"e@^  
} =}@m$g  
} }hT1@I   
z!09vDB^  
/** '8g/^Y@  
* @param data k:(i sKIA  
* @param l &&C]i~  
* @param i }NQx2k0  
*/ l@}BWSx&ms  
private void insertSort(int[] data, int start, int len) { [.e Y xZ{=  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :sT\-MpQvn  
} W!a~ #R/r-  
} i?^C c\gH  
} |.D_[QI  
} 5u ED  
~<0!sE&y  
堆排序: 6km{= ```  
,}&E=5MF\  
package org.rut.util.algorithm.support; %SV"iXxY  
% I]?xe6  
import org.rut.util.algorithm.SortUtil; y]OW{5(  
x~."P*5  
/** B7Um G)C  
* @author treeroot iR-MuDM  
* @since 2006-2-2 13s0uyYU<m  
* @version 1.0  YM9oVF-  
*/ A[juzOn\  
public class HeapSort implements SortUtil.Sort{ h3^ &,U  
-la~p~8  
/* (non-Javadoc) U:]b&I  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q?C)5(  
*/ K7&A^$`  
public void sort(int[] data) { xN t  
MaxHeap h=new MaxHeap(); tMaJ; 4  
h.init(data); 02]9 OnWw  
for(int i=0;i h.remove(); )=\W sQ  
System.arraycopy(h.queue,1,data,0,data.length); \6B,\l]$t@  
} e=t?mDh#E  
C~M~2@Iori  
private static class MaxHeap{ AR\?bB~`c  
LX<c(i  
void init(int[] data){ g{8 R+  
this.queue=new int[data.length+1]; XezO_V  
for(int i=0;i queue[++size]=data; `~( P  
fixUp(size); kmM4KP#&|  
} 4%WV)lt  
} G+ =6]0HT  
]rM{\En  
private int size=0; 2aUz.k8o  
xh> /bU!>  
private int[] queue; H[%F o  
.kM74X=S  
public int get() { Hk-)fl#dr  
return queue[1]; hoASrj{s  
} _t:cDXj  
o"^}2^)_SR  
public void remove() { ypXKw7f(  
SortUtil.swap(queue,1,size--); )>,b>7  
fixDown(1); 4ei .-  
} ]>@; 2%YvY  
file://fixdown  l;>#O  
private void fixDown(int k) { V"VWHAu*.w  
int j; 3OHP-oa.  
while ((j = k << 1) <= size) { 9frx60  
if (j < size %26amp;%26amp; queue[j] j++; Ms ?V1  
if (queue[k]>queue[j]) file://不用交换 ~4Is   
break; S[UHx}.  
SortUtil.swap(queue,j,k); {Ny\9r  
k = j; &)Z8Qu  
} 1Qf21oN{  
} (H9%a-3  
private void fixUp(int k) { ( DwIAO/S  
while (k > 1) { q{f%U.  
int j = k >> 1; bIizh8d?  
if (queue[j]>queue[k]) : o$ R@l  
break; @u/<^j3Q  
SortUtil.swap(queue,j,k); 1G|Q~%cv  
k = j; XzQ=8r>l  
} @.kv",[{[  
} 8aGZ% UI  
MAR kTxzi  
} fD q, )~D  
kETA3(h'  
} )iy>sa{  
tZ[BfO  
SortUtil: [p@NzS/  
5h[u2&;G  
package org.rut.util.algorithm; p)ta c*US  
QN-n9f8  
import org.rut.util.algorithm.support.BubbleSort; CzzG  
import org.rut.util.algorithm.support.HeapSort; +nd'Uf   
import org.rut.util.algorithm.support.ImprovedMergeSort; &+`l $h  
import org.rut.util.algorithm.support.ImprovedQuickSort; oO @6c%  
import org.rut.util.algorithm.support.InsertSort; 'KQ]7  
import org.rut.util.algorithm.support.MergeSort; W<2%J)N<  
import org.rut.util.algorithm.support.QuickSort; uYL6g:]+ZC  
import org.rut.util.algorithm.support.SelectionSort; )F? 57eh  
import org.rut.util.algorithm.support.ShellSort; P0Na<)\'Y!  
!N,Z3p>Q  
/** 5 LX3.  
* @author treeroot wRPBJ-C)  
* @since 2006-2-2 UF<|1;'  
* @version 1.0 *ILS/`mdav  
*/ q30WUO;  
public class SortUtil { YH<F~F _  
public final static int INSERT = 1; C?rL>_+71  
public final static int BUBBLE = 2; CpS' 2@6  
public final static int SELECTION = 3; Beqhe\{  
public final static int SHELL = 4; mkBQX  
public final static int QUICK = 5; QC<( rx  
public final static int IMPROVED_QUICK = 6; h9+ylHW_cp  
public final static int MERGE = 7; G !1- 20  
public final static int IMPROVED_MERGE = 8; f'FY<ed<w  
public final static int HEAP = 9; +nuv?QB/  
6WfyP@ f  
public static void sort(int[] data) { dGIu0\J\$  
sort(data, IMPROVED_QUICK); <zZAVGb4I  
} uc Z(D|a   
private static String[] name={ ? z=>n  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .ET;wK  
}; JIb<>X,  
Pms3X  
private static Sort[] impl=new Sort[]{ xOT'4v&.  
new InsertSort(), K- }k-S  
new BubbleSort(), `r*6P^P  
new SelectionSort(), ? |8&!F  
new ShellSort(), ,zXL8T  
new QuickSort(), 'dWJ#9C  
new ImprovedQuickSort(), phXVuQ  
new MergeSort(), X""'}X|O  
new ImprovedMergeSort(), oTI*mGR1Z  
new HeapSort() TP{a*ke^5,  
}; sxThz7#i)  
|~ \K:[T&  
public static String toString(int algorithm){ CHeG{l)<r  
return name[algorithm-1]; }0 <x4|=  
} sTG+c E  
2zFdKs,  
public static void sort(int[] data, int algorithm) { 6S6nE%.3  
impl[algorithm-1].sort(data); t C6c4j  
} FG#j0#|*  
c+a f=ac  
public static interface Sort { v9inBBC q  
public void sort(int[] data); CPVKz   
} VdeK~#k  
@0 -B&w  
public static void swap(int[] data, int i, int j) { -m|b2g}"3  
int temp = data; rG\m]C3E  
data = data[j]; Czv lZDo  
data[j] = temp; ZC2C`S\xr  
} 6km u'vw  
} fykN\b  
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