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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。 F*Hovxez  
插入排序: lemV&$WN|  
>yP> ]r+  
package org.rut.util.algorithm.support; 8N9,HNBT$  
j?]+~  
import org.rut.util.algorithm.SortUtil;  + @f  
/** XP%_|Q2X  
* @author treeroot Vh?vD:|  
* @since 2006-2-2 =FIZh}JD  
* @version 1.0 .B2e$`s$  
*/ Pp69|lxV=k  
public class InsertSort implements SortUtil.Sort{ CVkJMH_  
|IzL4>m:;  
/* (non-Javadoc) ONcLhwH  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M.MQ?`_"b  
*/ NopfL  
public void sort(int[] data) { n[K%Xs)  
int temp; U"Bge\6x=  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); l$c/!V[3  
} <kwF<J  
} z@\mn  
} #`%S[)RT  
h,BPf5\S  
} US9aW)8  
Zj ` ;IYFG  
冒泡排序: ^z, B}Nz  
0k?]~ f  
package org.rut.util.algorithm.support; <im}R9eJ1  
p= x &X~  
import org.rut.util.algorithm.SortUtil; =X[?d/[  
)AdwA+-x  
/** T8&sPt,f  
* @author treeroot bZfq?   
* @since 2006-2-2 +cmi?~KS*  
* @version 1.0 tlvZy+Blv  
*/ 4Jc~I  
public class BubbleSort implements SortUtil.Sort{ eUCBQK  
z%+rI  
/* (non-Javadoc) f!5w+6(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tK*y/S  
*/ &c&TQkx  
public void sort(int[] data) { a+k3wzJ  
int temp; `#`C.:/n  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ls9Y?  
if(data[j] SortUtil.swap(data,j,j-1); \j wxW6>  
} |)%H_TXTy  
} 0 .T5% _ /  
} a"g\f{v0AR  
} ?g@X+!RB  
gC kR$.-E  
} !m'Rp~t  
W}zq9|p  
选择排序: Rx&.,gzj[  
:2vuc!Pu  
package org.rut.util.algorithm.support; a;~< iB;3"  
j%Uoigi  
import org.rut.util.algorithm.SortUtil; j!k$SDA-  
s)-bOZi  
/** !a!4^zqp  
* @author treeroot IFa~`Gf[  
* @since 2006-2-2 +tg${3ti_  
* @version 1.0 PX/^*  
*/ y[S9b (:+  
public class SelectionSort implements SortUtil.Sort { LZs'hA<L  
xkSVD6Km  
/* }jWg&<5+z  
* (non-Javadoc) U-,s/VQ?  
* 7z/O#Fbs  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G6x'Myg I  
*/ tk8\,!9Q  
public void sort(int[] data) { :1gpbfW  
int temp; CMv8n@ry  
for (int i = 0; i < data.length; i++) { 4N7|LxNNl_  
int lowIndex = i; Y;g\ @j  
for (int j = data.length - 1; j > i; j--) { v|]"uPxH?  
if (data[j] < data[lowIndex]) { 8$ X3J[_j  
lowIndex = j; lU$0e09  
} ,TB$D]u8  
} Pl`Nniy  
SortUtil.swap(data,i,lowIndex); NB.'>Sar  
} "}-S%v`)z  
} +/M%%:>mY  
fuF{8-ua  
} ,i;#e  
:LdPqFXj  
Shell排序: 2hryY  
%S$$*|_G  
package org.rut.util.algorithm.support; %yl17:h#  
JZ:yPvJ  
import org.rut.util.algorithm.SortUtil; e VQ-?DK  
"o_'q@.}  
/** _bgv +/  
* @author treeroot O;}K7rSc  
* @since 2006-2-2 PqF&[M<)  
* @version 1.0 NN5Ejr,  
*/ tB(~:"|8  
public class ShellSort implements SortUtil.Sort{ |pq9i)e&  
fYh<S  
/* (non-Javadoc) P46Q3EE  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p7r/`_'|  
*/ QH,(iX6RY  
public void sort(int[] data) { Z`ww[Tbv~  
for(int i=data.length/2;i>2;i/=2){ 'lu3BQvfh  
for(int j=0;j insertSort(data,j,i); L2~'Z'q  
} 39F e#u  
} SR?(z  
insertSort(data,0,1); B_b5&M@  
} ~gNFcJuy  
-R\dgS3  
/** &"hEKIqL  
* @param data GCfVH?Vx  
* @param j wArfnB&  
* @param i u3pFH(  
*/ ;_E|I=%'E  
private void insertSort(int[] data, int start, int inc) { X:g#&e_  
int temp; WLfDXx 2A  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); Np ru  
} S'hUh'PZ  
} jF/S2Ty2  
} !=a]Awr\  
v'S5F@ln  
} BpYxH#4  
BHZhdm@),  
快速排序: Z,Us<du  
W7!iYxO  
package org.rut.util.algorithm.support; n+YUG  
`<M>"~W  
import org.rut.util.algorithm.SortUtil; k6RVP: V  
['sNk[-C  
/** &/"a E  
* @author treeroot uN>5Eh&=Pf  
* @since 2006-2-2 W\;|mEEu  
* @version 1.0 jvL!pEC!  
*/ rPGj+wL5-  
public class QuickSort implements SortUtil.Sort{ -)}Z $;1a  
/7:+.#Ag`  
/* (non-Javadoc) uZ\+{j=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u#Jr_ze  
*/  [)~1Lu  
public void sort(int[] data) { G'PZ=+!XO/  
quickSort(data,0,data.length-1); 3JBXGT0gJ  
} A>2_I)  
private void quickSort(int[] data,int i,int j){ U,;796h  
int pivotIndex=(i+j)/2; " r o'?  
file://swap m_@XoS yxI  
SortUtil.swap(data,pivotIndex,j); >$E;."a  
_6ck@  
int k=partition(data,i-1,j,data[j]); qq)}GK8K&  
SortUtil.swap(data,k,j); BI%XF 9{  
if((k-i)>1) quickSort(data,i,k-1); NlKVl~_ C  
if((j-k)>1) quickSort(data,k+1,j); /WE\0bf  
gBcs  
} -eyF9++`  
/** `?3f76}h  
* @param data ]7S f)  
* @param i /W BmR R  
* @param j f pq|mY  
* @return -bHlFNRm  
*/ P~=yTW  
private int partition(int[] data, int l, int r,int pivot) { 'xx M0Kn`  
do{ }^&f {   
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Z/ jmi  
SortUtil.swap(data,l,r); 5:f!EMb  
} sg2%BkTI  
while(l SortUtil.swap(data,l,r); ;(Ug]U%3_  
return l; A`Y^qXFb`  
} Hcu!bOQ  
~o"=4q`>  
} pa+'0Y]71  
d9;&Y?fp  
改进后的快速排序: kexV~Q  
uMZ~[S z  
package org.rut.util.algorithm.support; E(|A"=\  
DlE,aYB  
import org.rut.util.algorithm.SortUtil; \?T9 v  
<;PKec  
/** R2sG'<0B0  
* @author treeroot wb?k  
* @since 2006-2-2 J~]@#=,v  
* @version 1.0 8lYA6A  
*/ Si?s69  
public class ImprovedQuickSort implements SortUtil.Sort { hDJG.,r  
n*wQgC'vw  
private static int MAX_STACK_SIZE=4096; C:t>u..  
private static int THRESHOLD=10; h' !C  
/* (non-Javadoc) -?)^ hbr  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =IsmPQKi  
*/ 'QT~o-U  
public void sort(int[] data) { dnoF)(d&Cm  
int[] stack=new int[MAX_STACK_SIZE]; \~E?;q!  
O?Bf (y  
int top=-1; {k_\1t(/  
int pivot; W4^zKnH  
int pivotIndex,l,r; =?6c&Z  
rAu% bF  
stack[++top]=0; JfN '11,$  
stack[++top]=data.length-1; : x&R'wX-  
CsA(oX  
while(top>0){ qS/}aDk&  
int j=stack[top--]; s"=TM$Vb  
int i=stack[top--]; *zrGrk:l  
0NU%z.(%s  
pivotIndex=(i+j)/2; < bC'.m  
pivot=data[pivotIndex]; . f ja;aG  
.t1:;H b  
SortUtil.swap(data,pivotIndex,j); ;^xM" {G8  
*pwkv7Z h  
file://partition B.r^'>jQ  
l=i-1; '/u|32  
r=j; W:RjWn@<  
do{ uAA2G\3  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); o(SPT?ao~  
SortUtil.swap(data,l,r); rH`\UZ{cc  
} q!:dZES  
while(l SortUtil.swap(data,l,r); >SDQ@63E?  
SortUtil.swap(data,l,j); 9Y.(xp &vw  
7?whxi Qs  
if((l-i)>THRESHOLD){ RD:G 9[  
stack[++top]=i; W 94:%  
stack[++top]=l-1; -13}]Gls7Q  
} \.mVLLtG  
if((j-l)>THRESHOLD){ -H6[{WVW!  
stack[++top]=l+1; ck{S  
stack[++top]=j; bs"J]">(N  
} wH o}wp  
i`gM> q&  
} Q<V(#)*  
file://new InsertSort().sort(data); i4|R0>b  
insertSort(data); fG'~@'P~  
} e|{R2z"^  
/** 5FR#CQ  
* @param data H\Qk U`b  
*/ H7tv iSTd  
private void insertSort(int[] data) { 0beP7}$  
int temp; Mm@G{J\\  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); _ARG "  
} AZQQge  
} ar<8wq<4G  
} PN93.G(W  
x\G%  
} Bn]=T  
*Mhirz% iD  
归并排序: \~*<[.8~  
'{2]:  
package org.rut.util.algorithm.support; %FYhq:j  
^Ye(b7Gd  
import org.rut.util.algorithm.SortUtil; $"vz>SuB  
j<~Wp$\i7>  
/** P_5aHeiJ  
* @author treeroot 06]3+s{{  
* @since 2006-2-2 V#w$|2  
* @version 1.0 .JLJ(WM  
*/ qt@/  
public class MergeSort implements SortUtil.Sort{ >}*W$i  
{C 5:as  
/* (non-Javadoc)  ,RR{Y-  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %8n<#0v-|4  
*/ t?>}0\1  
public void sort(int[] data) { `;}`>!8j  
int[] temp=new int[data.length]; /#Pm'i>B  
mergeSort(data,temp,0,data.length-1); ,pD sU@  
} 0E26J@jcZ7  
CBd%}il  
private void mergeSort(int[] data,int[] temp,int l,int r){ &'/"=lK  
int mid=(l+r)/2; mj'~-$5T  
if(l==r) return ; *:H,-@  
mergeSort(data,temp,l,mid); p"hO6b%V  
mergeSort(data,temp,mid+1,r); Em&3g  
for(int i=l;i<=r;i++){ uNn1qV  
temp=data; Hy3J2p9.  
} ~JT2el2W7p  
int i1=l; I]eeV+U8W  
int i2=mid+1; W~mo*EJ'^  
for(int cur=l;cur<=r;cur++){ y7UU'k`  
if(i1==mid+1) (@} ^ 3jpT  
data[cur]=temp[i2++]; ^)9/Wz _x  
else if(i2>r) [ ojL9.6  
data[cur]=temp[i1++]; 7310'wc  
else if(temp[i1] data[cur]=temp[i1++]; 2B$dT=G  
else *}C%z(  
data[cur]=temp[i2++]; c-hc.i}!  
} ZOfv\(iJ;  
} 4|_xz; i  
OT\D;Z"__I  
} 3q4Zwv0z20  
lknj/i5L  
改进后的归并排序: I?D=Q $s  
K{_~W yRF  
package org.rut.util.algorithm.support; aiX&`   
Y[L,rc/j  
import org.rut.util.algorithm.SortUtil; 0E#??gN  
!X7z y9  
/** RTVU3fw  
* @author treeroot I7Kgi3  
* @since 2006-2-2 g"sb0d9  
* @version 1.0 uH$hMg  
*/ ?H8w;Csq-  
public class ImprovedMergeSort implements SortUtil.Sort { s;P _LaIp)  
pHR`%2!"t  
private static final int THRESHOLD = 10; ^?fsJ  
sRT5i9TQ  
/* iyCH)MA  
* (non-Javadoc) mIf)=RW  
* 4'D^>z!c  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2n>mISy+  
*/ b [HnhAI  
public void sort(int[] data) { j6^.Q/{^  
int[] temp=new int[data.length]; &kd W(;`  
mergeSort(data,temp,0,data.length-1); a`yCPnB(  
} ?W ^`Fa)]o  
x3'ANw6E  
private void mergeSort(int[] data, int[] temp, int l, int r) { *8qRdI9  
int i, j, k; =UO7!vr;[  
int mid = (l + r) / 2; SLP $|E;  
if (l == r) N@0/=B[n  
return; ,hNs{-*  
if ((mid - l) >= THRESHOLD) A* qR<cp[  
mergeSort(data, temp, l, mid); "=]'"'B:  
else ?_{{iil  
insertSort(data, l, mid - l + 1); B[sI7D>Y  
if ((r - mid) > THRESHOLD) Wx/PD=Sf&  
mergeSort(data, temp, mid + 1, r); IH*G7;  
else zLr:zfl  
insertSort(data, mid + 1, r - mid); umPN=0u6  
CA|W4f}  
for (i = l; i <= mid; i++) { 68~]_r.a  
temp = data; W"/,<xHuh  
} q\P{h ij  
for (j = 1; j <= r - mid; j++) { ~]%re9jGW  
temp[r - j + 1] = data[j + mid]; 8}oe))b  
} P<1&kUZL  
int a = temp[l]; 4t*VI<=<[  
int b = temp[r]; 2bXCFv7}  
for (i = l, j = r, k = l; k <= r; k++) { F$v^S+Ch  
if (a < b) { Y]&2E/oc  
data[k] = temp[i++]; 3 P\4K  
a = temp; fCb&$oRr!  
} else { y\6C9%.  
data[k] = temp[j--]; :`yW^b  
b = temp[j]; Xa}y.qH  
} V?MaI .gj  
} (Gzq 1+B  
} :gkn`z  
iF##3H$c  
/** 9Z2aFW9  
* @param data >r:z`^p  
* @param l l0!`>Xx[b  
* @param i F%ukT6xp  
*/ v{SYz<(  
private void insertSort(int[] data, int start, int len) { ]R"n+LnI:=  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _}H`(d%N  
} -k,}LJjo  
} @MH/e fW.  
} }z-)!8vF  
} @!\lt$  
Em<J{`k6  
堆排序: oe_,q&e  
rt! lc-g%/  
package org.rut.util.algorithm.support; >va9*pdJ  
tdi}P/x  
import org.rut.util.algorithm.SortUtil; :=`N2D  
(j)>npOd9  
/** fJ-8$w\uL  
* @author treeroot o[G,~f\-  
* @since 2006-2-2 s\ ]Rgi>w  
* @version 1.0 8{.:$T  
*/ @rW%*?$7  
public class HeapSort implements SortUtil.Sort{ y?s#pSX;N  
Q0_|?]v  
/* (non-Javadoc) `ucr;P  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \xtmd[7lb<  
*/ ByXcs'  
public void sort(int[] data) { 'q*/P&x5  
MaxHeap h=new MaxHeap(); ~u80v h'  
h.init(data); @ GzN0yXhR  
for(int i=0;i h.remove(); 9y"\]G77E  
System.arraycopy(h.queue,1,data,0,data.length); P-lE,X   
} "IsDL^)A9  
-}<W|r  
private static class MaxHeap{ kKSn^q L*  
[hXU$Y>"0  
void init(int[] data){ <j89HtCz  
this.queue=new int[data.length+1]; ^,Y#_$oR  
for(int i=0;i queue[++size]=data; GfT`>M?QGK  
fixUp(size); n&uD=-  
} 8h7z  
} 9/S-=VOe.t  
>&N8Du*[  
private int size=0; "(#]H;!W  
fNaS?tV)  
private int[] queue; owc#RW9 7  
hAp<$7  
public int get() { R`|GBVbv  
return queue[1]; KC{ HX?  
} t.oP]_mI  
:Keek-E`e=  
public void remove() { B?J #NFUb  
SortUtil.swap(queue,1,size--); JB= L\E}  
fixDown(1); 6muZE1sn  
} _/5mgn<GK  
file://fixdown aYQIe7J90J  
private void fixDown(int k) { [SJ*ks,]  
int j; >*%mJX/F  
while ((j = k << 1) <= size) { k:0HsN!F9  
if (j < size %26amp;%26amp; queue[j] j++; ( XoL,lJ  
if (queue[k]>queue[j]) file://不用交换 p M:lg  
break; ^SKuX?f\  
SortUtil.swap(queue,j,k); PNn{Rt  
k = j; lclSzC9  
} a$SGFA}V  
} Zg/ra1n  
private void fixUp(int k) { bm_'giQ:  
while (k > 1) { wh@;$s"B  
int j = k >> 1; @m[r0i0J"  
if (queue[j]>queue[k]) +Q3i&"QB.  
break; ?HBNd&gZ1G  
SortUtil.swap(queue,j,k); 4~3 N;]X  
k = j; |BGQ|7DyG  
} W"_")V=QBz  
} Z!P7mH\c}  
I=)u:l c  
} lV-b   
%(,Kj ~0  
} _>8ZL)NQQ  
wtCz%!OYB  
SortUtil: B6&;nU>;  
V(|@6ww  
package org.rut.util.algorithm; %o4ZD7@ '  
i"~J -{d}  
import org.rut.util.algorithm.support.BubbleSort; |?=K'[ 5  
import org.rut.util.algorithm.support.HeapSort; mX9amS&B$  
import org.rut.util.algorithm.support.ImprovedMergeSort; ?H\K];  
import org.rut.util.algorithm.support.ImprovedQuickSort; VFj}{Y  
import org.rut.util.algorithm.support.InsertSort; YQWGv,47\  
import org.rut.util.algorithm.support.MergeSort; `<1o}r 7i  
import org.rut.util.algorithm.support.QuickSort; B 3Y,|*  
import org.rut.util.algorithm.support.SelectionSort; KErQCBeJ  
import org.rut.util.algorithm.support.ShellSort; x78`dX  
:nZVP_d+  
/** LE!xj 0  
* @author treeroot E)l0`83~^  
* @since 2006-2-2 |kPjjVGF{  
* @version 1.0 AM4lAq_  
*/ ' XJ>;",[  
public class SortUtil { 3":vjDq$  
public final static int INSERT = 1; 6;WfsG5  
public final static int BUBBLE = 2; 1 PL2[_2:  
public final static int SELECTION = 3; }w{ 6Ua  
public final static int SHELL = 4; ZS*PY,  
public final static int QUICK = 5; ^=f<WKn  
public final static int IMPROVED_QUICK = 6; 4PtRTb0<i3  
public final static int MERGE = 7; =P}ob eY  
public final static int IMPROVED_MERGE = 8; jlvh'y`  
public final static int HEAP = 9; $on"@l%U  
.ME>ICA  
public static void sort(int[] data) { !6Sr*a*5  
sort(data, IMPROVED_QUICK); Hd*e9;z  
} dwd5P7  
private static String[] name={ c2Q KI~\x  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U($bR|%D  
}; T?vM\o%i3  
[Dr'  
private static Sort[] impl=new Sort[]{ g=)B+SY'  
new InsertSort(), aQjs5RbP~  
new BubbleSort(), 0&M~lJ  
new SelectionSort(), 7s8-Uwl<  
new ShellSort(), =E6ND8l@2  
new QuickSort(), ;a"g<v  
new ImprovedQuickSort(), 52X[ {  
new MergeSort(), WP*xu-(:  
new ImprovedMergeSort(), 'q3<R%^Q   
new HeapSort() 3K;V3pJ].  
}; |/^ KFY"  
8 5 L<  
public static String toString(int algorithm){ S vTd#>ke  
return name[algorithm-1]; l k~VvRq  
} |7Dc7p"D  
55Pe&V1=  
public static void sort(int[] data, int algorithm) { )RUx  
impl[algorithm-1].sort(data); 6zbqv6  
} zR@4Z>6   
.rPg  
public static interface Sort { ?04jkq&  
public void sort(int[] data); "SMRvi57T  
} 4{PN9i E  
s9#WkDR  
public static void swap(int[] data, int i, int j) { ttP|}|O  
int temp = data; \wjT|z1+Y  
data = data[j]; Lm-f0\(  
data[j] = temp; > J.q3  
} ^;8dl.;  
} 5q^5DH_;  
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