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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,WKo B  
插入排序: N4a`8dS|  
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package org.rut.util.algorithm.support; coF T2Pq  
% QPWw~}:  
import org.rut.util.algorithm.SortUtil; H ~[LJ5x  
/** `!nJS|  
* @author treeroot ,G[r+4|h  
* @since 2006-2-2 c{mKra  
* @version 1.0 >P\h,1  
*/ qukjS#>+  
public class InsertSort implements SortUtil.Sort{ &0+x2e)7g  
,pyQP^u-  
/* (non-Javadoc) iY ^{wi~?  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1m>^{u  
*/ |oe!P}u  
public void sort(int[] data) { <AI>8j6#B  
int temp; cQ(}^KO  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); c$Xe.:QY  
} "[jhaUAK  
} 9Hf*cQ  
} NqJ<!q)  
ptV4s=G2  
} _{6,.TN  
~LawF_]6  
冒泡排序: ;RWW+x8IB  
8%o~4u3  
package org.rut.util.algorithm.support; .vv5 t  
FOCoiocPi  
import org.rut.util.algorithm.SortUtil; p!+L  
5Noe/6  
/** ^oQekga\l  
* @author treeroot Dq/3E-y5  
* @since 2006-2-2 C9<4~IM w  
* @version 1.0 45x,|h[F{5  
*/ SkiJ pMN  
public class BubbleSort implements SortUtil.Sort{  r=fE8[,  
!uWxRpT,7  
/* (non-Javadoc) cVQatm  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &sm @  
*/ owE<7TGPI?  
public void sort(int[] data) { 29"mE;j  
int temp; XVQL.A7  
for(int i=0;i for(int j=data.length-1;j>i;j--){ H1` rM^,%A  
if(data[j] SortUtil.swap(data,j,j-1); sA/,+aM  
} <9ma(PFa  
} )K{o<m~WAo  
} ;#3ekl{-g  
} \s=QiPK  
Bu7A{DRf  
} f;.SSiT  
zzX<?6MS  
选择排序: \Y*!f|=of  
3YR* ^  
package org.rut.util.algorithm.support; 6#<Ir @z  
c}\ ' x5:o  
import org.rut.util.algorithm.SortUtil; ! L4dUMo  
Dba+z-3Nzy  
/** H}vn$$ O  
* @author treeroot 8NnhT E  
* @since 2006-2-2 z>6.[Z(T  
* @version 1.0 c  Qld$  
*/ 1'NhjL  
public class SelectionSort implements SortUtil.Sort { o g_Ri$x8  
RNGO~:k?r  
/* P,(9cyS{  
* (non-Javadoc) j7f5|^/x3  
* Ll,I-BQ 9  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mHKJ  
*/ GF&_~48GD  
public void sort(int[] data) { XmP;L(wa   
int temp; S#,+Z7  
for (int i = 0; i < data.length; i++) { F y b[{"  
int lowIndex = i; $h,d? .u6w  
for (int j = data.length - 1; j > i; j--) { ZQ|5W6c  
if (data[j] < data[lowIndex]) { 'r~8  
lowIndex = j; rB,ldy,f  
} {`a(Tl8V  
} +|6`E3j%  
SortUtil.swap(data,i,lowIndex); O{~KR/  
} Gc wt7~  
} FtE90=$  
ri:,q/-  
} '}_=kp'X  
_0K.Fk*(!  
Shell排序: f6Ml[!aU  
X1Qr _o-BR  
package org.rut.util.algorithm.support; ThtMRB)9  
6_WmCtvF  
import org.rut.util.algorithm.SortUtil; mxgqS=`  
jDkm:X}:  
/** -!l^]MU  
* @author treeroot L ${m/@9  
* @since 2006-2-2 :WVSJ,. !  
* @version 1.0 Uls+n@\!  
*/ DE%fF,Hk3  
public class ShellSort implements SortUtil.Sort{ VrVDm*AGQ  
w^3|(F  
/* (non-Javadoc) ?b56AE  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p+$+MeBz  
*/ &Y+e=1a+  
public void sort(int[] data) { 6F(hY !}5  
for(int i=data.length/2;i>2;i/=2){ wZQ)jo7*g  
for(int j=0;j insertSort(data,j,i); ^_sQG  
} 0Q7MM6  
} [P{a_(  
insertSort(data,0,1); )AI?x@  
} "TfI+QgLF  
!~)90Z!  
/** u\f3qc,]F  
* @param data B_hPcmB  
* @param j d .p'pGL  
* @param i  c-5Ysg  
*/ =5?.'XMk  
private void insertSort(int[] data, int start, int inc) { `%Q&</X  
int temp; 6AAswz'$P  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); F_ 81l<  
} b:1 L@8s;  
} /[%w*v*'  
} okstY4f'  
?pqU3-knH  
} cAb>2]M5V  
w//omF'`  
快速排序: UA0F):  
a fx'  
package org.rut.util.algorithm.support; 4@h;5   
gX^ PSsp  
import org.rut.util.algorithm.SortUtil; %&h c"7/k  
J#''q"rZ  
/** W&YU^&`Yr  
* @author treeroot _lX8K:C(  
* @since 2006-2-2 ALXTR%f  
* @version 1.0 zW5C1:.3K  
*/ b1xpz1  
public class QuickSort implements SortUtil.Sort{ vQgq]mA?  
6WeM rWx  
/* (non-Javadoc) !p',Za   
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7 \X$7  
*/ {~_ Y _-  
public void sort(int[] data) { RkA8  
quickSort(data,0,data.length-1); WI&lj<*  
} gw+eM,Yp  
private void quickSort(int[] data,int i,int j){ &iBNO,v  
int pivotIndex=(i+j)/2; !zR)D|w&  
file://swap w#9_eq|3  
SortUtil.swap(data,pivotIndex,j); Xh}&uZ`A  
9 I{/zKq  
int k=partition(data,i-1,j,data[j]); 8Q=ZH=SQK  
SortUtil.swap(data,k,j); : y1Bt+Fp  
if((k-i)>1) quickSort(data,i,k-1); RYy,wVh}  
if((j-k)>1) quickSort(data,k+1,j); pawl|Z'Ez  
aCl A{  
} UV@0gdy[  
/** G?xJv`"9iC  
* @param data Bd# TUy  
* @param i O,'#C\   
* @param j E7`qmn  
* @return 64umul  
*/ ]Lm'RlV  
private int partition(int[] data, int l, int r,int pivot) { C6]OAUXy:F  
do{ $gvr -~  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); mp1ttGUtM  
SortUtil.swap(data,l,r); QIK 9  
} `N'V#)Pi  
while(l SortUtil.swap(data,l,r); (`c G  
return l; :h*a rT4{  
} Jzex]_:1~  
3{ "O,h  
} .3X Y&6  
I 8z G~L%"  
改进后的快速排序: d:rGyA]  
I2[]A,f ,  
package org.rut.util.algorithm.support; '3Q3lM'lh  
 "r$/  
import org.rut.util.algorithm.SortUtil; )];aIA$  
vFhz!P~  
/** e.8$ga{  
* @author treeroot (>7>3  
* @since 2006-2-2 >bIF>9T  
* @version 1.0 :FHA]oec1  
*/ Ej"u1F14J  
public class ImprovedQuickSort implements SortUtil.Sort { !YE zFU`L  
# yN*',I&  
private static int MAX_STACK_SIZE=4096; |`0n"x7  
private static int THRESHOLD=10; pW|u P8#  
/* (non-Javadoc) tTuX\;G  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |]sx+NlNc  
*/ {dzoEM[ 1s  
public void sort(int[] data) { Cy@ cLdV  
int[] stack=new int[MAX_STACK_SIZE]; L'E^c,-x~  
fYX<d%?7  
int top=-1; >cgpajx*  
int pivot; tJU-<{8  
int pivotIndex,l,r; .zkP~xQ~  
Md&WJ };L  
stack[++top]=0; U(,.D}PG  
stack[++top]=data.length-1; :_HF j.JW  
7lA:)a_!]  
while(top>0){ "#4dW7E  
int j=stack[top--]; k;KdW P  
int i=stack[top--]; Mu&x_&|  
fk{0d  
pivotIndex=(i+j)/2; m4m<nnM  
pivot=data[pivotIndex]; |5MbAqjzC  
`^6 ,kI-c  
SortUtil.swap(data,pivotIndex,j); @dEiVF`4:  
75NRCXh.  
file://partition AK@L32-S  
l=i-1; [Qj;/  
r=j; <]d LX}C)  
do{ %!|O.xxRR  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); E^CiOTN  
SortUtil.swap(data,l,r); z]@6fM[  
} Or+p%K}-7  
while(l SortUtil.swap(data,l,r); s\3q!A?S3  
SortUtil.swap(data,l,j); &JhX +'U  
cUk*C  
if((l-i)>THRESHOLD){ \?lz&<  
stack[++top]=i; 5v _P Oq  
stack[++top]=l-1; ,hRN\Kt)p  
} $>q@SJ1q  
if((j-l)>THRESHOLD){ 1cC1*c0Z  
stack[++top]=l+1; c0rk<V%5+  
stack[++top]=j; vhgLcrn  
} {C3Y7<  
8@\7&C(g17  
} ?Bx./t><  
file://new InsertSort().sort(data); ]A+o>#n}x  
insertSort(data); Es4qPB`g.  
} ',=g;  
/** 5V5w:U>_z  
* @param data S Xr%kndS  
*/ C9~~O~7x  
private void insertSort(int[] data) { #Dy?GB08  
int temp; X#p Wyo~  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); l#qv 5f  
} ^@6q  
} PK2~fJB  
} E"PcrWB&  
Xm!-~n@-m7  
} nJFg^s 1  
egR-w[{  
归并排序: QlZ@ To  
tWPO]3hW  
package org.rut.util.algorithm.support; {D`T0qPT[  
r4XH =  
import org.rut.util.algorithm.SortUtil; G| m4m.  
5iX! lAFJ  
/** ~)]} 91p  
* @author treeroot 1vevEa$  
* @since 2006-2-2 q1{H~VSn"  
* @version 1.0 ^{yk[tHpS  
*/ nk=$B (h  
public class MergeSort implements SortUtil.Sort{ \2e0|)aF6  
 zGlZ!t:  
/* (non-Javadoc) S: :>N.y  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G}zZQy  
*/ \_BkY%a  
public void sort(int[] data) { Ym8}ZW-  
int[] temp=new int[data.length]; m`A% p  
mergeSort(data,temp,0,data.length-1); 5Av=3[kh"%  
} :k=mzO<&  
gAbD7SE  
private void mergeSort(int[] data,int[] temp,int l,int r){ A%bCMP  
int mid=(l+r)/2; +9A\HQ|22  
if(l==r) return ; nv/[I,nw  
mergeSort(data,temp,l,mid); 7/Il L  
mergeSort(data,temp,mid+1,r); 3iNkoBCg  
for(int i=l;i<=r;i++){ @%ECj)u`O  
temp=data; f'Mop= .  
} ,_ 2x{0w:>  
int i1=l; N_gD>6I  
int i2=mid+1; Bi%x`4Lf  
for(int cur=l;cur<=r;cur++){ &#{dWObh  
if(i1==mid+1) r6.d s^  
data[cur]=temp[i2++]; ~/#1G.H  
else if(i2>r) vGd1w%J-  
data[cur]=temp[i1++]; &, a3@i  
else if(temp[i1] data[cur]=temp[i1++]; Fke//- R  
else 7<\C ?`q"  
data[cur]=temp[i2++]; C(?blv-vM0  
} V-yUJ#f8[  
} tT%/r,  
^s:y/Kd  
} >l5$9wO  
6<'K~1do:  
改进后的归并排序: &2.u%[gO[q  
(R}ii}&  
package org.rut.util.algorithm.support; 2t#L:vY  
'DbMF?<.  
import org.rut.util.algorithm.SortUtil; w Iv o"|%  
Vm1-C<V9  
/** A<MtKb  
* @author treeroot `)$_YZq|SR  
* @since 2006-2-2 0#p/A^\#7M  
* @version 1.0 e]8,:Gd(  
*/ Am4lEvb  
public class ImprovedMergeSort implements SortUtil.Sort { $&I 'o  
5g5'@vMN  
private static final int THRESHOLD = 10; fz_nsVD  
 ZI>km?w  
/* Q;/a F`  
* (non-Javadoc) KA s1(oG  
* \3YO<E!t  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (g!p>m!Z  
*/ UK[v6".^h  
public void sort(int[] data) { J5M+FwZq  
int[] temp=new int[data.length]; [1G^/K"  
mergeSort(data,temp,0,data.length-1); >!6JKL~=  
} kSncZ0K{  
R!\EK H  
private void mergeSort(int[] data, int[] temp, int l, int r) { i'/m4 !>h  
int i, j, k; 2h=%K/hhY  
int mid = (l + r) / 2; HfNDD| Zz  
if (l == r) `TLzVB-j3  
return; W6c]-pc  
if ((mid - l) >= THRESHOLD) +K",^6%1  
mergeSort(data, temp, l, mid); / +K?  
else ^C)n$L>C0  
insertSort(data, l, mid - l + 1); '-$XX%TOAc  
if ((r - mid) > THRESHOLD) Rqip kx  
mergeSort(data, temp, mid + 1, r); tfO#vw,@  
else YPDf Y<?v  
insertSort(data, mid + 1, r - mid); v6(E3)J7  
256LHY|6  
for (i = l; i <= mid; i++) { y2L#:[8  
temp = data; }ut]\]b  
} <U Zd;e@  
for (j = 1; j <= r - mid; j++) { 7L5P%zLtB  
temp[r - j + 1] = data[j + mid]; D=f7NVc>Q  
} : esg(  
int a = temp[l]; z,SYw &S  
int b = temp[r]; Aj>[z8!,  
for (i = l, j = r, k = l; k <= r; k++) { }GwVKAjP  
if (a < b) { Ka!I`Yf  
data[k] = temp[i++]; I<oL}f  
a = temp; >`RRP}u=u  
} else { Ut@RGg+f8  
data[k] = temp[j--]; >H][.@LyR  
b = temp[j]; eU+ {*YJg  
} 4vnUN  
} I,@r5tK o  
} F0Jx(  
ChrY"  
/** OTWkUB{  
* @param data d50Vtm\  
* @param l XKOUQc4!R  
* @param i vT^Sk;E  
*/ Sb2v_o  
private void insertSort(int[] data, int start, int len) { + xv!$gJEj  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z`Wt%tL(  
} :fcM:w&  
} dIwe g=x  
} t:~t@4j}  
} UKd'+R]  
2.uA|~qH  
堆排序: 1 k8x%5p  
Pz_Oe,{.I  
package org.rut.util.algorithm.support; IE~%=/|  
F t&+vS  
import org.rut.util.algorithm.SortUtil; unl1*4e+  
K]oM8H1  
/** ^y.nDs%ZT7  
* @author treeroot C2U~=q>>  
* @since 2006-2-2 rt-\g1x  
* @version 1.0 &$FvWFRh#  
*/ nv0@xnbz  
public class HeapSort implements SortUtil.Sort{ q(o/yx{bm  
5FKBv e@  
/* (non-Javadoc) JNI>VP[c  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?WI3/>:<  
*/ I_)*)d44_  
public void sort(int[] data) { fN%jJ-[d  
MaxHeap h=new MaxHeap(); +Lm4kA+aE5  
h.init(data); 'Ye v} QM  
for(int i=0;i h.remove(); `|O yRU"EK  
System.arraycopy(h.queue,1,data,0,data.length); 3k$[r$+"  
} 2/P"7A=<  
Et2JxbD  
private static class MaxHeap{ kTIYD o  
:t$aN|>y  
void init(int[] data){ ihe(F7\U  
this.queue=new int[data.length+1]; 9v )%dO.  
for(int i=0;i queue[++size]=data; bKVj[r8D~  
fixUp(size); u+9<&)X0  
} u^W2UE\  
} _,AzJ^  
v5ur&egVs  
private int size=0; [] W;t\h  
l3o#@sz:  
private int[] queue; #G]!%  
zJlQ_U-!  
public int get() { 7^TV~E#  
return queue[1]; Tpp&  
} ?^#lWx q  
's x\P[a  
public void remove() { qOV[TP,  
SortUtil.swap(queue,1,size--); CG]Sj*SA~  
fixDown(1); :,pSWfK H  
} @ez Tbc3  
file://fixdown K ?$#nt p  
private void fixDown(int k) { !<@J6??a}s  
int j; ^nK7i[yF.k  
while ((j = k << 1) <= size) { gYop--\14]  
if (j < size %26amp;%26amp; queue[j] j++; ybdd;t}&1  
if (queue[k]>queue[j]) file://不用交换 xG&SX#[2  
break; +#J,BKul  
SortUtil.swap(queue,j,k); \$*$='6"  
k = j; t=euE{c  
} K r`]_m  
} +V862R4,o  
private void fixUp(int k) { q~K(]Ya/  
while (k > 1) { @JkK99\(>9  
int j = k >> 1; qF)< H  
if (queue[j]>queue[k]) 7Du1RuxP  
break; nxm$}!Df  
SortUtil.swap(queue,j,k); R5_i15<  
k = j; 8[%Ao/m  
} qa >Ay|92e  
} [&S}dQ"  
Oeya%C5'  
} \a^,sV  
th5g\h%j*  
} Wo$%9!W  
8euZTfK9e  
SortUtil: cTZ.}eLh  
,hxkk`  
package org.rut.util.algorithm; \[2lvft!  
$gle8Z-  
import org.rut.util.algorithm.support.BubbleSort; n_D8JF  
import org.rut.util.algorithm.support.HeapSort; VzS&`d.h  
import org.rut.util.algorithm.support.ImprovedMergeSort;  @gGRm  
import org.rut.util.algorithm.support.ImprovedQuickSort; L];y}]:F*  
import org.rut.util.algorithm.support.InsertSort; 'WyTI^K9  
import org.rut.util.algorithm.support.MergeSort; ?wpB`  
import org.rut.util.algorithm.support.QuickSort; VxO%rq3  
import org.rut.util.algorithm.support.SelectionSort; M.}7pJ7f  
import org.rut.util.algorithm.support.ShellSort; #b0{#^S:  
_1Z=q.sC  
/** lt'I,Xt  
* @author treeroot Eu<1Bse;  
* @since 2006-2-2 Mq%,lJA\  
* @version 1.0 7YWNd^FI V  
*/ HHk)ZfWRo  
public class SortUtil { Y]aW)u  
public final static int INSERT = 1; `:{B(+6  
public final static int BUBBLE = 2; }*U[>Z-eO  
public final static int SELECTION = 3; 2Nc>6  
public final static int SHELL = 4; -5G)?J/*  
public final static int QUICK = 5; 96Wp!]*  
public final static int IMPROVED_QUICK = 6; =;~I_)Pg1  
public final static int MERGE = 7; 1{"llD  
public final static int IMPROVED_MERGE = 8; ?z-}>$I;  
public final static int HEAP = 9; ^>4o$}  
JMBK{JK>  
public static void sort(int[] data) { 5wtTP ;P  
sort(data, IMPROVED_QUICK); ']6VB,c`  
} JHn*->m  
private static String[] name={ }]P4-KqI  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q!'rz  
}; Z@D*1\TG=  
iGXI6`F"  
private static Sort[] impl=new Sort[]{ `xS{0P{uj  
new InsertSort(), t-%Q`V=[  
new BubbleSort(), [V# r7a  
new SelectionSort(), ^S)TO}e  
new ShellSort(), [(LV  
new QuickSort(), p 5u_1U0  
new ImprovedQuickSort(), BF|(!8S$U  
new MergeSort(), m8]?hJY 3l  
new ImprovedMergeSort(), {-zMHVw=}  
new HeapSort() :Gqy>)CxX  
}; Tn-C>=tR~%  
DdV'c@rq+  
public static String toString(int algorithm){ V% TH7@y  
return name[algorithm-1]; %n0;[sD0A  
} ;bu#8,  
T0HuqJty  
public static void sort(int[] data, int algorithm) { $e%2t^ i.g  
impl[algorithm-1].sort(data); 3Q}$fQ&S  
} JEn3`B!*  
r WtZj}A  
public static interface Sort { =#5D(0Ab  
public void sort(int[] data); <T?oKOD ]  
} OqhD7 +  
@pV5}N[]  
public static void swap(int[] data, int i, int j) { z(RL<N%  
int temp = data; ~K_Uq*dCE  
data = data[j]; <{(/E0~V/<  
data[j] = temp; &6 -k#r  
} 4tA_YIv  
} Die-@z|Y  
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