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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。 =t/ "&[r  
插入排序: ~t>i+{J KE  
s=Cu-.~L  
package org.rut.util.algorithm.support; vKcZgIR  
IL]Js W  
import org.rut.util.algorithm.SortUtil; #j+0jFu  
/** qZV.~F+  
* @author treeroot 0^0Q0A  
* @since 2006-2-2 H%peE9>$  
* @version 1.0 !Ojf9 6is  
*/ (bX77 Xr  
public class InsertSort implements SortUtil.Sort{ ]O^C'GzZ  
L[D<e?j  
/* (non-Javadoc) wWI1%#__|o  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kH.W17D~  
*/ LLMom.  
public void sort(int[] data) { !kTI@103Wd  
int temp; )K.'sX{B  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 8]`LRzM  
} ?2q;`Nb  
} + a,x  
} }akF=/M  
aqw;T\GI+~  
}  )S8fFV  
l_ES $%d  
冒泡排序: &OM e'P  
e5GJ:2sH  
package org.rut.util.algorithm.support; <o aVI?  
Vx~N`|yY  
import org.rut.util.algorithm.SortUtil; -p-<mC@<&S  
V-7A80!5  
/** RBA{!  
* @author treeroot tO@n3"O  
* @since 2006-2-2 :L6,=#  
* @version 1.0 ru#CywK{{;  
*/ 7 {n>0@_  
public class BubbleSort implements SortUtil.Sort{ @V7HxW7RX  
q-3e^-S*  
/* (non-Javadoc) ,ix>e  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .H33C@  
*/ z'!sc"]W6  
public void sort(int[] data) { Ec/-f `8  
int temp;  |Ok=aV7  
for(int i=0;i for(int j=data.length-1;j>i;j--){ oIJ.Tv@N(  
if(data[j] SortUtil.swap(data,j,j-1); < %t$0'  
} V6CRl&ZKO  
} &^I2NpT  
} \7d T]VV  
} $q%l)]+  
hmG^l4B.T  
} 7rZE7+%]  
uto E}U7]  
选择排序: FQgc\-8tm  
sT<XZLu  
package org.rut.util.algorithm.support; :&'[#%h8  
<CIy|&J6  
import org.rut.util.algorithm.SortUtil; @((Y[<  
mC,:.d  
/** 2Sha&Z*CE  
* @author treeroot %u@}lG k  
* @since 2006-2-2 k0e {c  
* @version 1.0 P'Gf7sQt7  
*/ Q2 S!}A  
public class SelectionSort implements SortUtil.Sort { ? kBX:(g  
B=;p wX  
/* 5i eF8F%  
* (non-Javadoc) OngUZMgdb  
* ^rX5C2}G\D  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yo^9Y@WDW  
*/ fhp+Ep!0Y  
public void sort(int[] data) { VmbfwHRWb  
int temp; b;~?a#Z}  
for (int i = 0; i < data.length; i++) { m+LP5S  
int lowIndex = i; #$?!P1  
for (int j = data.length - 1; j > i; j--) { vyXL F'L  
if (data[j] < data[lowIndex]) { Tg;1;XM%  
lowIndex = j; GX@=b6#-  
} H2iC? cSR  
} 7K`Z<v&*  
SortUtil.swap(data,i,lowIndex); _enS_R  
} gc"A Tc  
} 9u^yEqG`  
Y *?hA'  
} FDQP|,  
KrzIL[;2o  
Shell排序: ZR |n\.  
-SeHz.` N  
package org.rut.util.algorithm.support; 7+c}D>/`:  
*vS)aRK  
import org.rut.util.algorithm.SortUtil; Tsc2;I  
:vWixgLg  
/** 6qYK"^+xu  
* @author treeroot QZ?%xN(4  
* @since 2006-2-2 EA=EcUf'  
* @version 1.0 /@xL {  
*/ .{t]Mc  
public class ShellSort implements SortUtil.Sort{ '1NZSiv+C?  
0\DlzIO  
/* (non-Javadoc) yq]/r=e!k  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pY"&=I79tb  
*/ &3~_9+  
public void sort(int[] data) { ;]A:(HSZj  
for(int i=data.length/2;i>2;i/=2){ ^3 6oqe{  
for(int j=0;j insertSort(data,j,i); ;>jLRx<KC  
} #_9Jam%M  
} 9X ^D(  
insertSort(data,0,1); [qHtN.  
} NB)$l2<d  
{K ,-fbE  
/** *T:gx:Sg/  
* @param data *m.4)2u=  
* @param j = t!$72g\  
* @param i +T*]!9%<`:  
*/ ^Sj*  
private void insertSort(int[] data, int start, int inc) { $-l\&V++F  
int temp; &l;wb.%ijW  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); Bm:N@wg  
} 'M=c-{f~  
} skzTw66W.  
} M?I^Od'8  
96 P3B}Dk  
} ~z&Ho  
a$2 WL g,  
快速排序: VcpN PU6  
LP:U6 Z  
package org.rut.util.algorithm.support; Ew$-,KC[  
bG&vCH;}%  
import org.rut.util.algorithm.SortUtil; c8}jO=/5+  
E As1 =  
/** A>Y!d9]ti  
* @author treeroot 0?/vcsO  
* @since 2006-2-2 dePI&z:  
* @version 1.0 LvbS")  
*/ -5.~POO  
public class QuickSort implements SortUtil.Sort{ wpS $ -  
Ou,Eu05jt'  
/* (non-Javadoc) &8'QD~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aX,ux9#  
*/ k`;&??  
public void sort(int[] data) { _ H$^m#h  
quickSort(data,0,data.length-1); y1*z," dx  
} GkYD:o=qx  
private void quickSort(int[] data,int i,int j){ `bMwt?[*  
int pivotIndex=(i+j)/2; S/H!a:_5r  
file://swap 3lo.YLP^  
SortUtil.swap(data,pivotIndex,j); }v$T1Cw  
8B"my\  
int k=partition(data,i-1,j,data[j]); 6Cvg-X@  
SortUtil.swap(data,k,j); >#8J@=iuqv  
if((k-i)>1) quickSort(data,i,k-1); DfX}^'#m+  
if((j-k)>1) quickSort(data,k+1,j); <rAWu\d;  
6"PwOEt  
} n^:Wc[[m  
/** ~h@<14c{X  
* @param data u8sK~1CPf  
* @param i }\wTV*n`X  
* @param j :j4i(qcF  
* @return jSMs<ox  
*/ ]YqeI*BX  
private int partition(int[] data, int l, int r,int pivot) { ^iz2 =}Q8  
do{ w/Ej>OS  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); h& Q9  
SortUtil.swap(data,l,r); O({vHqN>  
} MsLQ'9%Au  
while(l SortUtil.swap(data,l,r); t]PO4GA  
return l; UCDvN  
} u[yUUYe  
?KF.v1w7  
} ]id5jVY  
zyF[I6Gs  
改进后的快速排序: w 7Y>B`wm?  
97~*Z|#<+  
package org.rut.util.algorithm.support; .>bvI1  
s\#eD0|  
import org.rut.util.algorithm.SortUtil; 1h0cId8d  
-YfpfNt  
/** +'fdAc:5',  
* @author treeroot 3G9AS#-C  
* @since 2006-2-2 7.DAwx.HYK  
* @version 1.0 ~n $e  
*/ f[$9k}.  
public class ImprovedQuickSort implements SortUtil.Sort { dab[x@#r>  
({l!'>?  
private static int MAX_STACK_SIZE=4096; {<}kqn83sT  
private static int THRESHOLD=10; Ow7}&\;^-  
/* (non-Javadoc) UB&)U\hn  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (y;8izp9!  
*/ 2O~I.(9(  
public void sort(int[] data) { km+}./@  
int[] stack=new int[MAX_STACK_SIZE]; Ls~F4ar$/  
EPMdR66  
int top=-1; *[?DnF+  
int pivot; n^m6m%J)  
int pivotIndex,l,r; M.QXwIT  
_O*"_^6  
stack[++top]=0; @vcvte  
stack[++top]=data.length-1; Mk"V%)1k  
2~BId&]  
while(top>0){ 3cztMi  
int j=stack[top--]; ?]bZ6|;2  
int i=stack[top--]; %}%vey  
d,0Yi u.p  
pivotIndex=(i+j)/2; r\sQ8/  
pivot=data[pivotIndex]; k2S6 SB  
MX.=k>  
SortUtil.swap(data,pivotIndex,j); hc4W|Ofj  
|K%nVcR=  
file://partition WF{rrU:  
l=i-1; Gj}P6V _  
r=j; BHW8zY=F  
do{ XCTee  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); SKf[&eP,G  
SortUtil.swap(data,l,r); zXHCP.Rmg  
} (!0=~x|Z[  
while(l SortUtil.swap(data,l,r); 5$ra4+k0  
SortUtil.swap(data,l,j); e2 ?7>?  
!SFF 79$c  
if((l-i)>THRESHOLD){ <Hq|<^_K  
stack[++top]=i; N>$Nw<wV  
stack[++top]=l-1; t6)wR  
} !pNY`sw}  
if((j-l)>THRESHOLD){ ZxRD+`  
stack[++top]=l+1; Kpo{:a  
stack[++top]=j; =os%22*  
} UEvRK?mm=  
9V%s1@K  
} Ba],ONM4k  
file://new InsertSort().sort(data); *CH lg1  
insertSort(data); oKJj?%dHK9  
} PB :Lj  
/** e Ert_@}  
* @param data K 8gd?88  
*/ 5r:SBt|/  
private void insertSort(int[] data) { 9 OC!\' 8  
int temp; 4?AggqW  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); b]NSCu*)s  
} G^]7!:0  
} jI8qiZ);~  
} yBPaGZ{f  
lF\oEMd*  
} h>6'M  
d2x|PpmH  
归并排序: &.Jp,Xt)  
~8-Z=-  
package org.rut.util.algorithm.support; [kyF|3k~  
CjtXU=}A  
import org.rut.util.algorithm.SortUtil; /8GgEW9Q~G  
IR+dGqIjZb  
/** >!OD[9  
* @author treeroot y6lle<SIu  
* @since 2006-2-2 WJ9=hr  
* @version 1.0 8- ?.Q"D7%  
*/ Asn7 ;x0;  
public class MergeSort implements SortUtil.Sort{ v [_C^;  
oXc!JZ^  
/* (non-Javadoc) 8gv \`  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aIv>X@U}  
*/ @}K'Ic  
public void sort(int[] data) { 1A4!zqT;  
int[] temp=new int[data.length]; XF{ g~M  
mergeSort(data,temp,0,data.length-1); LsnM5GU7  
} z\,g %u41  
g3%Xh0007{  
private void mergeSort(int[] data,int[] temp,int l,int r){ 99@uU[&IJ  
int mid=(l+r)/2; n# %mL<  
if(l==r) return ; 1@ )8E`u  
mergeSort(data,temp,l,mid); M%dXy^e  
mergeSort(data,temp,mid+1,r); JRkC~fv  
for(int i=l;i<=r;i++){ Y{TzN%|LV  
temp=data; m ?a&XZ  
} %&+j(?9  
int i1=l; &k /uR;yw  
int i2=mid+1; 4+od N.  
for(int cur=l;cur<=r;cur++){ 1Z?en  
if(i1==mid+1) /RuGh8qzP  
data[cur]=temp[i2++];  iK$)Iy0  
else if(i2>r) "r!O9X6  
data[cur]=temp[i1++]; !e?GS"L~  
else if(temp[i1] data[cur]=temp[i1++]; GNzk Vy:u  
else yVvO!  
data[cur]=temp[i2++]; [a;U'v*  
} J~6+zBF  
} Vf#X[$pc/  
W>Eee?  
} i2SR.{&  
,F7W_f# @3  
改进后的归并排序: 1MH[-=[Q  
.v36xXK(  
package org.rut.util.algorithm.support; >;eWgQ6V  
aU,Zjm7fp  
import org.rut.util.algorithm.SortUtil; (c ?OcwTH  
(PjC]`FK  
/** XYtDovbv&  
* @author treeroot }1P>^I"[Y  
* @since 2006-2-2 |*W`}i  
* @version 1.0 {)j3Pn  
*/ `H6-g=C  
public class ImprovedMergeSort implements SortUtil.Sort { ?GPTJ#=j=]  
Cpu L[|51  
private static final int THRESHOLD = 10; :b[ [}'  
|*5Kfxq  
/* hPa:>e  
* (non-Javadoc) B] dvX  
* +1R?R9^Fw  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n 0_q-8r  
*/ R _WP r[P  
public void sort(int[] data) { C fKvC  
int[] temp=new int[data.length]; (+d7cln  
mergeSort(data,temp,0,data.length-1); +85i;gO5  
} =m.Lw  
\jDD=ew  
private void mergeSort(int[] data, int[] temp, int l, int r) { ufE;rcYE  
int i, j, k; XBE+O7  
int mid = (l + r) / 2; A*jU&3#  
if (l == r) M=$ qus  
return; zdFO&YHTw  
if ((mid - l) >= THRESHOLD) V9*Z  
mergeSort(data, temp, l, mid); VMPBM:k G  
else ?IR]y-r  
insertSort(data, l, mid - l + 1); ,U+y)w]ar  
if ((r - mid) > THRESHOLD) /EF0~iy  
mergeSort(data, temp, mid + 1, r); U|QLc   
else 4.:2!Q  
insertSort(data, mid + 1, r - mid); a>x3UVf_  
u}ULb F  
for (i = l; i <= mid; i++) { BbEWa  
temp = data; "c8 -xG  
} n,hl6[OL7  
for (j = 1; j <= r - mid; j++) { P(BjXMd  
temp[r - j + 1] = data[j + mid]; Q>R jv.1  
} m~c z  
int a = temp[l]; 5+*MqO>  
int b = temp[r]; (- `h8M  
for (i = l, j = r, k = l; k <= r; k++) { 7\>P@s  
if (a < b) { b^[Ab:`}[V  
data[k] = temp[i++]; ~.99H  
a = temp; qPeaSv]W  
} else { hK F*{,'  
data[k] = temp[j--]; .?T,>#R  
b = temp[j]; 6)i4&  
} #9-qF9M  
} u~WBu|  
} npC:SrI%  
"mlVs/nsyG  
/** E9e|+$  
* @param data '4-J0S<<_  
* @param l `|maf=SnY5  
* @param i 32nB9[l  
*/ a*?bnw?  
private void insertSort(int[] data, int start, int len) { nBw4YDR!  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {~J'J$hn8  
} coa+@g,w7#  
} t5: 1' N9P  
} L?_'OwaY  
} 1t&LNIc|^  
a6\0XVU  
堆排序: N 4Kj)E@  
2d),*Cvf  
package org.rut.util.algorithm.support; nn[OC=cDN  
?=zF]J:G1w  
import org.rut.util.algorithm.SortUtil;  A [W3.$s  
h9<*+T  
/** 6Ih8~Hu  
* @author treeroot L'(ei7Z  
* @since 2006-2-2 mX8k4$z  
* @version 1.0 ^pgVU&-~]/  
*/ r<< ]41  
public class HeapSort implements SortUtil.Sort{ t&5N{C:  
O5X@'.#rU  
/* (non-Javadoc) 8EbJ5wu/%S  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?|4Y(0N  
*/ %gBulvg  
public void sort(int[] data) { w[ )97d  
MaxHeap h=new MaxHeap(); ,#n$YT7  
h.init(data); N@}5Fnk-  
for(int i=0;i h.remove(); 90g=&O5@O  
System.arraycopy(h.queue,1,data,0,data.length); <}Hfu-PLo  
} 1jHugss9|  
p>Z18  
private static class MaxHeap{ ,xcm:; &  
d\c?sYLv  
void init(int[] data){ 3|++2Z{},  
this.queue=new int[data.length+1]; |E]`rfr  
for(int i=0;i queue[++size]=data; 73C7g< Mx  
fixUp(size); CuT~ Bj  
} ~ 9Xs=S!  
} hIBW$  
3[_zz;Y*d  
private int size=0; 9NXL8QmC8  
2TQyQ%  
private int[] queue; MSQz,nn  
{>EM=ZZfg  
public int get() { hCpX# rg?  
return queue[1]; nDG41)|  
} { $ a $m  
Qqm$Jl!  
public void remove() { 9:\#GOg  
SortUtil.swap(queue,1,size--); \eH`{Z'.x5  
fixDown(1); vZ6_/ew8  
} B}?$kp  
file://fixdown 0NB5YQ8_]  
private void fixDown(int k) { S/?!ESW6  
int j; d ,"L8  
while ((j = k << 1) <= size) { G~. bi<(v  
if (j < size %26amp;%26amp; queue[j] j++; i>elK<R4  
if (queue[k]>queue[j]) file://不用交换 c]Z@L~WW  
break; 4Su|aWL-  
SortUtil.swap(queue,j,k); K U;d[Z@g  
k = j; s?j||  
} K>a@AXC  
} bM@8[&t a  
private void fixUp(int k) { Ca]V%g(  
while (k > 1) { wC&+nS1  
int j = k >> 1; v % c-El%  
if (queue[j]>queue[k]) vV$6fvS  
break; aG*Mj;J  
SortUtil.swap(queue,j,k); +uqP:z  
k = j; (Zi,~Wqm$  
} pw, <0UhV  
} :Vnus @#r  
T[(4z@d`5  
} :qAF}|6  
S\jIs[Dz  
} 9coN >y  
}57d3s  
SortUtil: bVgmjt2&>  
#Y_v0.N  
package org.rut.util.algorithm; E9N.b.Q)  
*B*dWMh  
import org.rut.util.algorithm.support.BubbleSort; -|cB7 P  
import org.rut.util.algorithm.support.HeapSort; c{(4s6D  
import org.rut.util.algorithm.support.ImprovedMergeSort; B k yW  
import org.rut.util.algorithm.support.ImprovedQuickSort; K lbUs\E  
import org.rut.util.algorithm.support.InsertSort; _N1UL?  
import org.rut.util.algorithm.support.MergeSort; TGuvyY  
import org.rut.util.algorithm.support.QuickSort; FfSKE  
import org.rut.util.algorithm.support.SelectionSort; L"x9O'U  
import org.rut.util.algorithm.support.ShellSort; TBU.%3dEyI  
1RU+d.&D  
/** znq/ %7  
* @author treeroot i_' u:P<t  
* @since 2006-2-2 KQu lz  
* @version 1.0  \LP?,<  
*/ 4*9WxhJ ]0  
public class SortUtil { 6 _n~E e  
public final static int INSERT = 1; 1cdX0[sN  
public final static int BUBBLE = 2; oMV^W^<  
public final static int SELECTION = 3; -<Oy5N  
public final static int SHELL = 4; ?ISv|QpC  
public final static int QUICK = 5; j0(+Kq:J  
public final static int IMPROVED_QUICK = 6; X"fSM #  
public final static int MERGE = 7; K /A1g.$  
public final static int IMPROVED_MERGE = 8; kf -/rC)>  
public final static int HEAP = 9; U#gv ~)\k  
D//uwom  
public static void sort(int[] data) { gZ 6Hj62D  
sort(data, IMPROVED_QUICK); ,!I'0x1OR  
} r>kDRIHB  
private static String[] name={ i-W!`1LH'  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6$'0^Ftm'  
}; oc0z1u  
LVAnZ'h/|  
private static Sort[] impl=new Sort[]{ iJ%`ym4Y  
new InsertSort(), hcrx(oJ5  
new BubbleSort(), :yS Q[AJ"  
new SelectionSort(), F7N4qq1  
new ShellSort(), -guVl 4 V  
new QuickSort(),  Z5[f  
new ImprovedQuickSort(), I]jK]]@  
new MergeSort(), LQ'VhNU  
new ImprovedMergeSort(), UEh-k"  
new HeapSort() WEZ)>[Xj?  
}; U66}nN9  
Y)KO*40c  
public static String toString(int algorithm){ R1/87eB  
return name[algorithm-1]; > Du>vlT Y  
} R)u ${  
?]Z EK8c  
public static void sort(int[] data, int algorithm) { 3`^NaQ  
impl[algorithm-1].sort(data); Q VJvuiUh  
} H'2Un(#Al  
eGW~4zU  
public static interface Sort { n%%u0a %  
public void sort(int[] data); 4K<T_B/  
} ?6>rQ6tBv  
`mo>~c7  
public static void swap(int[] data, int i, int j) { 6~y7A<[^  
int temp = data; w@Gk#  
data = data[j]; :d`8:gv?  
data[j] = temp; KGq4tlM6  
} P6([[mmG  
} bR&<vrMmrA  
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